fix lints

these were supposed to be 3 voxels but were on the order of 3 units

engine/graphics/Cargo.toml

@@ -11,7 +11,7 @@ id = { version = "0.1.0", registry = "strafesnet" }
 strafesnet_common = { path = "../../lib/common", registry = "strafesnet" }
 strafesnet_session = { path = "../session", registry = "strafesnet" }
 strafesnet_settings = { path = "../settings", registry = "strafesnet" }
-wgpu = "27.0.0"
+wgpu = "28.0.0"
 
 [lints]
 workspace = true

engine/graphics/src/graphics.rs

@@ -5,7 +5,7 @@ use strafesnet_settings::settings;
 use strafesnet_session::session;
 use strafesnet_common::model::{self, ColorId, NormalId, PolygonIter, PositionId, RenderConfigId, TextureCoordinateId, VertexId};
 use wgpu::{util::DeviceExt,AstcBlock,AstcChannel};
-use crate::model::{self as model_graphics,IndexedGraphicsMeshOwnedRenderConfig,IndexedGraphicsMeshOwnedRenderConfigId,GraphicsMeshOwnedRenderConfig,GraphicsModelColor4,GraphicsModelOwned,GraphicsVertex};
+use crate::model::{self as model_graphics,IndexedGraphicsMeshOwnedRenderConfig,IndexedGraphicsMeshOwnedRenderConfigId,GraphicsMeshOwnedRenderConfig,GraphicsModelColor4,GraphicsModelOwned,GraphicsVertex,DebugGraphicsVertex};
 
 pub fn required_limits()->wgpu::Limits{
 	wgpu::Limits::default()
@@ -36,12 +36,22 @@ struct GraphicsModel{
 	instance_count:u32,
 }
 
+struct DebugGraphicsMesh{
+	indices:Indices,
+	vertex_buf:wgpu::Buffer,
+}
+struct DebugGraphicsModel{
+	debug_mesh_id:u32,
+	bind_group:wgpu::BindGroup,
+}
+
 struct GraphicsSamplers{
 	repeat:wgpu::Sampler,
 }
 
 struct GraphicsBindGroupLayouts{
 	model:wgpu::BindGroupLayout,
+	debug_model:wgpu::BindGroupLayout,
 }
 
 struct GraphicsBindGroups{
@@ -52,6 +62,7 @@ struct GraphicsBindGroups{
 struct GraphicsPipelines{
 	skybox:wgpu::RenderPipeline,
 	model:wgpu::RenderPipeline,
+	debug:wgpu::RenderPipeline,
 }
 
 struct GraphicsCamera{
@@ -132,6 +143,8 @@ pub struct GraphicsState{
 	camera_buf:wgpu::Buffer,
 	temp_squid_texture_view:wgpu::TextureView,
 	models:Vec<GraphicsModel>,
+	debug_meshes:Vec<DebugGraphicsMesh>,
+	debug_models:Vec<DebugGraphicsModel>,
 	depth_view:wgpu::TextureView,
 	staging_belt:wgpu::util::StagingBelt,
 }
@@ -166,6 +179,76 @@ impl GraphicsState{
 		self.camera.fov=user_settings.calculate_fov(1.0,&self.camera.screen_size).as_vec2();
 	}
 	pub fn generate_models(&mut self,device:&wgpu::Device,queue:&wgpu::Queue,map:&map::CompleteMap){
+		//generate debug meshes, each debug model refers to one
+		self.debug_meshes=map.meshes.iter().map(|mesh|{
+			let vertices:Vec<DebugGraphicsVertex>=mesh.unique_vertices.iter().map(|vertex|{
+				DebugGraphicsVertex{
+					pos:mesh.unique_pos[vertex.pos.get() as usize].to_array().map(Into::into),
+					normal:mesh.unique_normal[vertex.normal.get() as usize].to_array().map(Into::into),
+				}
+			}).collect();
+			let vertex_buf=device.create_buffer_init(&wgpu::util::BufferInitDescriptor{
+				label:Some("Vertex"),
+				contents:bytemuck::cast_slice(&vertices),
+				usage:wgpu::BufferUsages::VERTEX,
+			});
+
+			let mut indices=Vec::new();
+			for physics_group in &mesh.physics_groups{
+				for polygon_group_id in &physics_group.groups{
+					for poly in mesh.polygon_groups[polygon_group_id.get() as usize].polys(){
+						// triangulate
+						let mut poly_vertices=poly.into_iter().copied();
+						if let (Some(a),Some(mut b))=(poly_vertices.next(),poly_vertices.next()){
+							for c in poly_vertices{
+								indices.extend([a,b,c]);
+								b=c;
+							}
+						}
+					}
+				}
+			}
+
+			DebugGraphicsMesh{
+				indices:if (u32::MAX as usize)<vertices.len(){
+					panic!("Model has too many vertices!")
+				}else if (u16::MAX as usize)<vertices.len(){
+					Indices::new(device,&indices.into_iter().map(|vertex_idx|vertex_idx.get() as u32).collect(),wgpu::IndexFormat::Uint32)
+				}else{
+					Indices::new(device,&indices.into_iter().map(|vertex_idx|vertex_idx.get() as u16).collect(),wgpu::IndexFormat::Uint16)
+				},
+				vertex_buf,
+			}
+		}).collect();
+
+		//generate debug models, only one will be rendered at a time
+		self.debug_models=map.models.iter().enumerate().map(|(model_id,model)|{
+			let model_uniforms=get_instances_buffer_data(&[GraphicsModelOwned{
+				transform:model.transform.into(),
+				normal_transform:glam::Mat3::from_cols_array_2d(&model.transform.matrix3.to_array().map(|row|row.map(Into::into))).inverse().transpose(),
+				color:GraphicsModelColor4::new(glam::vec4(1.0,0.0,0.0,0.2)),
+			}]);
+			let model_buf=device.create_buffer_init(&wgpu::util::BufferInitDescriptor{
+				label:Some(format!("Debug Model{} Buf",model_id).as_str()),
+				contents:bytemuck::cast_slice(&model_uniforms),
+				usage:wgpu::BufferUsages::UNIFORM|wgpu::BufferUsages::COPY_DST,
+			});
+			let bind_group=device.create_bind_group(&wgpu::BindGroupDescriptor{
+				layout:&self.bind_group_layouts.debug_model,
+				entries:&[
+					wgpu::BindGroupEntry{
+						binding:0,
+						resource:model_buf.as_entire_binding(),
+					},
+				],
+				label:Some(format!("Debug Model{} Bind Group",model_id).as_str()),
+			});
+			DebugGraphicsModel{
+				debug_mesh_id:model.mesh.get(),
+				bind_group,
+			}
+		}).collect();
+
 		//generate texture view per texture
 		let texture_views:HashMap<model::TextureId,wgpu::TextureView>=map.textures.iter().enumerate().filter_map(|(texture_id,texture_data)|{
 			let texture_id=model::TextureId::new(texture_id as u32);
@@ -608,6 +691,21 @@ impl GraphicsState{
 				},
 			],
 		});
+		let debug_model_bind_group_layout=device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor{
+			label:Some("Debug Model Bind Group Layout"),
+			entries:&[
+				wgpu::BindGroupLayoutEntry{
+					binding:0,
+					visibility:wgpu::ShaderStages::VERTEX_FRAGMENT,
+					ty:wgpu::BindingType::Buffer{
+						ty:wgpu::BufferBindingType::Uniform,
+						has_dynamic_offset:false,
+						min_binding_size:None,
+					},
+					count:None,
+				},
+			],
+		});
 
 		let clamp_sampler=device.create_sampler(&wgpu::SamplerDescriptor{
 			label:Some("Clamp Sampler"),
@@ -616,7 +714,7 @@ impl GraphicsState{
 			address_mode_w:wgpu::AddressMode::ClampToEdge,
 			mag_filter:wgpu::FilterMode::Linear,
 			min_filter:wgpu::FilterMode::Linear,
-			mipmap_filter:wgpu::FilterMode::Linear,
+			mipmap_filter:wgpu::MipmapFilterMode::Linear,
 			..Default::default()
 		});
 		let repeat_sampler=device.create_sampler(&wgpu::SamplerDescriptor{
@@ -626,7 +724,7 @@ impl GraphicsState{
 			address_mode_w:wgpu::AddressMode::Repeat,
 			mag_filter:wgpu::FilterMode::Linear,
 			min_filter:wgpu::FilterMode::Linear,
-			mipmap_filter:wgpu::FilterMode::Linear,
+			mipmap_filter:wgpu::MipmapFilterMode::Linear,
 			anisotropy_clamp:16,
 			..Default::default()
 		});
@@ -754,15 +852,23 @@ impl GraphicsState{
 				&skybox_texture_bind_group_layout,
 				&model_bind_group_layout,
 			],
-			push_constant_ranges:&[],
+			immediate_size:0,
 		});
+		let debug_model_pipeline_layout=device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor{
+				label:None,
+				bind_group_layouts:&[
+					&camera_bind_group_layout,
+					&debug_model_bind_group_layout,
+				],
+				push_constant_ranges:&[],
+			});
 		let sky_pipeline_layout=device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor{
 			label:None,
 			bind_group_layouts:&[
 				&camera_bind_group_layout,
 				&skybox_texture_bind_group_layout,
 			],
-			push_constant_ranges:&[],
+			immediate_size:0,
 		});
 
 		// Create the render pipelines
@@ -793,7 +899,7 @@ impl GraphicsState{
 				bias:wgpu::DepthBiasState::default(),
 			}),
 			multisample:wgpu::MultisampleState::default(),
-			multiview:None,
+			multiview_mask:None,
 			cache:None,
 		});
 		let model_pipeline=device.create_render_pipeline(&wgpu::RenderPipelineDescriptor{
@@ -828,6 +934,45 @@ impl GraphicsState{
 				bias:wgpu::DepthBiasState::default(),
 			}),
 			multisample:wgpu::MultisampleState::default(),
+			multiview_mask:None,
+			cache:None,
+		});
+		let debug_model_pipeline=device.create_render_pipeline(&wgpu::RenderPipelineDescriptor{
+			label:Some("Debug Model Pipeline"),
+			layout:Some(&debug_model_pipeline_layout),
+			vertex:wgpu::VertexState{
+				module:&shader,
+				entry_point:Some("vs_debug"),
+				buffers:&[wgpu::VertexBufferLayout{
+					array_stride:size_of::<DebugGraphicsVertex>() as wgpu::BufferAddress,
+					step_mode:wgpu::VertexStepMode::Vertex,
+					attributes:&wgpu::vertex_attr_array![0=>Float32x3,1=>Float32x3],
+				}],
+				compilation_options:wgpu::PipelineCompilationOptions::default(),
+			},
+			fragment:Some(wgpu::FragmentState{
+				module:&shader,
+				entry_point:Some("fs_debug"),
+				targets:&[Some(wgpu::ColorTargetState{
+					format:config.view_formats[0],
+					blend:Some(wgpu::BlendState::ALPHA_BLENDING),
+					write_mask:wgpu::ColorWrites::default(),
+				})],
+				compilation_options:wgpu::PipelineCompilationOptions::default(),
+			}),
+			primitive:wgpu::PrimitiveState{
+				front_face:wgpu::FrontFace::Cw,
+				cull_mode:Some(wgpu::Face::Front),
+				..Default::default()
+			},
+			depth_stencil:Some(wgpu::DepthStencilState{
+				format:Self::DEPTH_FORMAT,
+				depth_write_enabled:true,
+				depth_compare:wgpu::CompareFunction::Always,
+				stencil:wgpu::StencilState::default(),
+				bias:wgpu::DepthBiasState::default(),
+			}),
+			multisample:wgpu::MultisampleState::default(),
 			multiview:None,
 			cache:None,
 		});
@@ -870,7 +1015,8 @@ impl GraphicsState{
 		Self{
 			pipelines:GraphicsPipelines{
 				skybox:sky_pipeline,
-				model:model_pipeline
+				model:model_pipeline,
+				debug:debug_model_pipeline,
 			},
 			bind_groups:GraphicsBindGroups{
 				camera:camera_bind_group,
@@ -879,9 +1025,14 @@ impl GraphicsState{
 			camera,
 			camera_buf,
 			models:Vec::new(),
+			debug_meshes:Vec::new(),
+			debug_models:Vec::new(),
 			depth_view,
-			staging_belt:wgpu::util::StagingBelt::new(0x100),
+			staging_belt:wgpu::util::StagingBelt::new(device.clone(),0x100),
-			bind_group_layouts:GraphicsBindGroupLayouts{model:model_bind_group_layout},
+			bind_group_layouts:GraphicsBindGroupLayouts{
+				model:model_bind_group_layout,
+				debug_model:debug_model_bind_group_layout,
+			},
 			samplers:GraphicsSamplers{repeat:repeat_sampler},
 			temp_squid_texture_view:squid_texture_view,
 		}
@@ -918,7 +1069,6 @@ impl GraphicsState{
 				&self.camera_buf,
 				0,
 				wgpu::BufferSize::new((camera_uniforms.len() * 4) as wgpu::BufferAddress).unwrap(),
-				device,
 			)
 			.copy_from_slice(bytemuck::cast_slice(&camera_uniforms));
 		//This code only needs to run when the uniforms change
@@ -965,11 +1115,13 @@ impl GraphicsState{
 				}),
 				timestamp_writes:Default::default(),
 				occlusion_query_set:Default::default(),
+				multiview_mask:None,
 			});
 
 			rpass.set_bind_group(0,&self.bind_groups.camera,&[]);
 			rpass.set_bind_group(1,&self.bind_groups.skybox_texture,&[]);
 
+			// Draw all models.
 			rpass.set_pipeline(&self.pipelines.model);
 			for model in &self.models{
 				rpass.set_bind_group(2,&model.bind_group,&[]);
@@ -981,6 +1133,19 @@ impl GraphicsState{
 
 			rpass.set_pipeline(&self.pipelines.skybox);
 			rpass.draw(0..3,0..1);
+
+			// render a single debug_model in red
+			if let Some(model_id)=frame_state.debug_model{
+				if let Some(model)=self.debug_models.get(model_id.get() as usize){
+					let mesh=&self.debug_meshes[model.debug_mesh_id as usize];
+					rpass.set_pipeline(&self.pipelines.debug);
+					rpass.set_bind_group(1,&model.bind_group,&[]);
+					rpass.set_vertex_buffer(0,mesh.vertex_buf.slice(..));
+					rpass.set_index_buffer(mesh.indices.buf.slice(..),mesh.indices.format);
+					//TODO: loop over triangle strips
+					rpass.draw_indexed(0..mesh.indices.count,0,0..1);
+				}
+			}
 		}
 
 		queue.submit(std::iter::once(encoder.finish()));

engine/graphics/src/model.rs

@@ -8,6 +8,12 @@ pub struct GraphicsVertex{
 	pub normal:[f32;3],
 	pub color:[f32;4],
 }
+#[derive(Clone,Copy,Pod,Zeroable)]
+#[repr(C)]
+pub struct DebugGraphicsVertex{
+	pub pos:[f32;3],
+	pub normal:[f32;3],
+}
 #[derive(Clone,Copy,id::Id)]
 pub struct IndexedGraphicsMeshOwnedRenderConfigId(u32);
 pub struct IndexedGraphicsMeshOwnedRenderConfig{

engine/physics/src/body.rs

@@ -33,7 +33,7 @@ impl<T:Copy> std::ops::Neg for &Body<T>{
 impl<T> Body<T>
 	where Time<T>:Copy,
 {
-	pub const ZERO:Self=Self::new(vec3::ZERO,vec3::ZERO,vec3::ZERO,Time::ZERO);
+	pub const ZERO:Self=Self::new(vec3::zero(),vec3::zero(),vec3::zero(),Time::ZERO);
 	pub const fn new(position:Planar64Vec3,velocity:Planar64Vec3,acceleration:Planar64Vec3,time:Time<T>)->Self{
 		Self{
 			position,
@@ -107,8 +107,8 @@ impl<T> Body<T>
 		self.time+=dt.into();
 	}
 	pub fn infinity_dir(&self)->Option<Planar64Vec3>{
-		if self.velocity==vec3::ZERO{
+		if self.velocity==vec3::zero(){
-			if self.acceleration==vec3::ZERO{
+			if self.acceleration==vec3::zero(){
 				None
 			}else{
 				Some(self.acceleration)

engine/physics/src/face_crawler.rs

@@ -21,12 +21,6 @@ impl<M:MeshQuery> CrawlResult<M>{
 			CrawlResult::Hit(face,time)=>Some((face,time)),
 		}
 	}
-	pub fn miss(self)->Option<FEV<M>>{
-		match self{
-			CrawlResult::Miss(fev)=>Some(fev),
-			CrawlResult::Hit(_,_)=>None,
-		}
-	}
 }
 
 // TODO: move predict_collision_face_out algorithm in here or something

engine/physics/src/lib.rs

@@ -1,7 +1,8 @@
 mod body;
-mod push_solve;
 mod face_crawler;
 mod model;
+mod push_solve;
+mod minimum_difference;
 
 pub mod physics;
 

engine/physics/src/minimum_difference.rs

@@ -0,0 +1,913 @@
+use strafesnet_common::integer::vec3;
+use strafesnet_common::integer::vec3::Vector3;
+use strafesnet_common::integer::{Fixed,Planar64,Planar64Vec3};
+
+use crate::model::{DirectedEdge,FEV,MeshQuery};
+// TODO: remove mesh invert
+use crate::model::{MinkowskiMesh,MinkowskiVert};
+
+// This algorithm is based on Lua code
+// written by Trey Reynolds in 2021
+
+type Simplex<const N:usize,Vert>=[Vert;N];
+#[derive(Clone,Copy)]
+enum Simplex1_3<Vert>{
+	Simplex1(Simplex<1,Vert>),
+	Simplex2(Simplex<2,Vert>),
+	Simplex3(Simplex<3,Vert>),
+}
+impl<Vert> Simplex1_3<Vert>{
+	fn push_front(self,v:Vert)->Simplex2_4<Vert>{
+		match self{
+			Simplex1_3::Simplex1([v0])=>Simplex2_4::Simplex2([v,v0]),
+			Simplex1_3::Simplex2([v0,v1])=>Simplex2_4::Simplex3([v,v0,v1]),
+			Simplex1_3::Simplex3([v0,v1,v2])=>Simplex2_4::Simplex4([v,v0,v1,v2]),
+		}
+	}
+}
+#[derive(Clone,Copy)]
+enum Simplex2_4<Vert>{
+	Simplex2(Simplex<2,Vert>),
+	Simplex3(Simplex<3,Vert>),
+	Simplex4(Simplex<4,Vert>),
+}
+
+/*
+local function absDet(r, u, v, w)
+	if w then
+		return math.abs((u - r):Cross(v - r):Dot(w - r))
+	elseif v then
+		return (u - r):Cross(v - r).magnitude
+	elseif u then
+		return (u - r).magnitude
+	else
+		return 1
+	end
+end
+*/
+impl<Vert> Simplex2_4<Vert>{
+	fn det_is_zero<M:MeshQuery<Vert=Vert>>(self,mesh:&M)->bool{
+		match self{
+			Self::Simplex4([p0,p1,p2,p3])=>{
+				let p0=mesh.vert(p0);
+				let p1=mesh.vert(p1);
+				let p2=mesh.vert(p2);
+				let p3=mesh.vert(p3);
+				(p1-p0).cross(p2-p0).dot(p3-p0)==Fixed::ZERO
+			},
+			Self::Simplex3([p0,p1,p2])=>{
+				let p0=mesh.vert(p0);
+				let p1=mesh.vert(p1);
+				let p2=mesh.vert(p2);
+				(p1-p0).cross(p2-p0)==vec3::zero()
+			},
+			Self::Simplex2([p0,p1])=>{
+				let p0=mesh.vert(p0);
+				let p1=mesh.vert(p1);
+				p1-p0==vec3::zero()
+			}
+		}
+	}
+}
+
+/*
+local function choosePerpendicularDirection(d)
+	local x, y, z = d.x, d.y, d.z
+	local best = math.min(x*x, y*y, z*z)
+	if x*x == best then
+		return Vector3.new(y*y + z*z, -x*y, -x*z)
+	elseif y*y == best then
+		return Vector3.new(-x*y, x*x + z*z, -y*z)
+	else
+		return Vector3.new(-x*z, -y*z, x*x + y*y)
+	end
+end
+*/
+fn choose_perpendicular_direction(d:Planar64Vec3)->Planar64Vec3{
+	let x=d.x.abs();
+	let y=d.y.abs();
+	let z=d.z.abs();
+	if x<y&&x<z{
+		Vector3::new([Fixed::ZERO,-d.z,d.y])
+	}else if y<z{
+		Vector3::new([d.z,Fixed::ZERO,-d.x])
+	}else{
+		Vector3::new([-d.y,d.x,Fixed::ZERO])
+	}
+}
+
+const fn choose_any_direction()->Planar64Vec3{
+	vec3::X
+}
+
+fn narrow_dir2(dir:Vector3<Fixed<2,64>>)->Planar64Vec3{
+	if dir==vec3::zero(){
+		return dir.narrow_1().unwrap();
+	}
+	let x=dir.x.as_bits().unsigned_abs().bits();
+	let y=dir.y.as_bits().unsigned_abs().bits();
+	let z=dir.z.as_bits().unsigned_abs().bits();
+	let big=x.max(y).max(z);
+	const MAX_BITS:u32=64+31;
+	if MAX_BITS<big{
+		dir>>(big-MAX_BITS)
+	}else{
+		dir
+	}.narrow_1().unwrap()
+}
+fn narrow_dir3(dir:Vector3<Fixed<3,96>>)->Planar64Vec3{
+	if dir==vec3::zero(){
+		return dir.narrow_1().unwrap();
+	}
+	let x=dir.x.as_bits().unsigned_abs().bits();
+	let y=dir.y.as_bits().unsigned_abs().bits();
+	let z=dir.z.as_bits().unsigned_abs().bits();
+	let big=x.max(y).max(z);
+	const MAX_BITS:u32=96+31;
+	if MAX_BITS<big{
+		dir>>(big-MAX_BITS)
+	}else{
+		dir
+	}.narrow_1().unwrap()
+}
+
+fn reduce1<M:MeshQuery>(
+	[v0]:Simplex<1,M::Vert>,
+	mesh:&M,
+	point:Planar64Vec3,
+)->Reduced<M::Vert>{
+	// --debug.profilebegin("reduceSimplex0")
+	// local a = a1 - a0
+	let p0=mesh.vert(v0);
+
+	// local p = -a
+	let p=-(p0+point);
+
+	// local direction = p
+	let mut dir=p;
+
+	// if direction.magnitude == 0 then
+	// 	direction = chooseAnyDirection()
+	if dir==vec3::zero(){
+		dir=choose_any_direction();
+	}
+
+	// return direction, a0, a1
+	Reduced{
+		dir,
+		simplex:Simplex1_3::Simplex1([v0]),
+	}
+}
+
+// local function reduceSimplex1(a0, a1, b0, b1)
+fn reduce2<M:MeshQuery>(
+	[v0,v1]:Simplex<2,M::Vert>,
+	mesh:&M,
+	point:Planar64Vec3,
+)->Reduced<M::Vert>{
+	// --debug.profilebegin("reduceSimplex1")
+	// local a = a1 - a0
+	// local b = b1 - b0
+	let p0=mesh.vert(v0);
+	let p1=mesh.vert(v1);
+
+	// local p = -a
+	// local u = b - a
+	let p=-(p0+point);
+	let u=p1-p0;
+
+	// -- modify to take into account the radiuses
+	// local p_u = p:Dot(u)
+	let p_u=p.dot(u);
+
+	// if p_u >= 0 then
+	if !p_u.is_negative(){
+		// local direction = u:Cross(p):Cross(u)
+		let direction=u.cross(p).cross(u);
+
+		// if direction.magnitude == 0 then
+		if direction==vec3::zero(){
+			return Reduced{
+				dir:choose_perpendicular_direction(u),
+				simplex:Simplex1_3::Simplex2([v0,v1]),
+			};
+		}
+
+		// -- modify the direction to take into account a0R and b0R
+		// return direction, a0, a1, b0, b1
+		return Reduced{
+			dir:narrow_dir3(direction),
+			simplex:Simplex1_3::Simplex2([v0,v1]),
+		};
+	}
+
+	// local direction = p
+	let mut dir=p;
+
+	// if direction.magnitude == 0 then
+	if dir==vec3::zero(){
+		dir=choose_perpendicular_direction(u);
+	}
+
+	// return direction, a0, a1
+	Reduced{
+		dir,
+		simplex:Simplex1_3::Simplex1([v0]),
+	}
+}
+
+// local function reduceSimplex2(a0, a1, b0, b1, c0, c1)
+fn reduce3<M:MeshQuery>(
+	[v0,mut v1,v2]:Simplex<3,M::Vert>,
+	mesh:&M,
+	point:Planar64Vec3,
+)->Reduced<M::Vert>{
+	// --debug.profilebegin("reduceSimplex2")
+	// local a = a1 - a0
+	// local b = b1 - b0
+	// local c = c1 - c0
+	let p0=mesh.vert(v0);
+	let p1=mesh.vert(v1);
+	let p2=mesh.vert(v2);
+
+	// local p = -a
+	// local u = b - a
+	// local v = c - a
+	let p=-(p0+point);
+	let mut u=p1-p0;
+	let v=p2-p0;
+
+	// local uv = u:Cross(v)
+	// local up = u:Cross(p)
+	// local pv = p:Cross(v)
+	// local uv_up = uv:Dot(up)
+	// local uv_pv = uv:Dot(pv)
+	let mut uv=u.cross(v);
+	let mut up=u.cross(p);
+	let pv=p.cross(v);
+	let uv_up=uv.dot(up);
+	let uv_pv=uv.dot(pv);
+
+	// if uv_up >= 0 and uv_pv >= 0 then
+	if !uv_up.is_negative()&&!uv_pv.is_negative(){
+		// local uvp = uv:Dot(p)
+		let uvp=uv.dot(p);
+
+		// local direction = uvp < 0 and -uv or uv
+		let direction=if uvp.is_negative(){
+			-uv
+		}else{
+			uv
+		};
+
+		// return direction, a0, a1, b0, b1, c0, c1
+		return Reduced{
+			dir:narrow_dir2(direction),
+			simplex:Simplex1_3::Simplex3([v0,v1,v2]),
+		};
+	}
+
+	// local u_u = u:Dot(u)
+	// local v_v = v:Dot(v)
+	// local uDist = uv_up/(u_u*v.magnitude)
+	// local vDist = uv_pv/(v_v*u.magnitude)
+	// local minDist2 = math.min(uDist, vDist)
+	let u_dist=uv_up*v.length();
+	let v_dist=uv_pv*u.length();
+
+	// if vDist == minDist2 then
+	if v_dist<u_dist{
+		u=v;
+		up=-pv;
+		uv=-uv;
+		// b0 = c0
+		// b1 = c1
+		v1=v2;
+	}
+
+	// local p_u = p:Dot(u)
+	let p_u=p.dot(u);
+
+	// if p_u >= 0 then
+	if !p_u.is_negative(){
+		// local direction = up:Cross(u)
+		let direction=up.cross(u);
+		// if direction.magnitude == 0 then
+		if direction==vec3::zero(){
+			// direction = uv
+			return Reduced{
+				dir:narrow_dir2(uv),
+				simplex:Simplex1_3::Simplex2([v0,v1]),
+			};
+		}
+
+		// return direction, a0, a1, b0, b1
+		return Reduced{
+			dir:narrow_dir3(direction),
+			simplex:Simplex1_3::Simplex2([v0,v1]),
+		};
+	}
+
+	// local direction = p
+	let dir=p;
+	// if direction.magnitude == 0 then
+	if dir==vec3::zero(){
+		// direction = uv
+		return Reduced{
+			dir:narrow_dir2(uv),
+			simplex:Simplex1_3::Simplex1([v0]),
+		};
+	}
+	// return direction, a0, a0
+	Reduced{
+		dir,
+		simplex:Simplex1_3::Simplex1([v0]),
+	}
+}
+
+// local function reduceSimplex3(a0, a1, b0, b1, c0, c1, d0, d1)
+fn reduce4<M:MeshQuery>(
+	[v0,mut v1,mut v2,v3]:Simplex<4,M::Vert>,
+	mesh:&M,
+	point:Planar64Vec3,
+)->Reduce<M::Vert>{
+	// --debug.profilebegin("reduceSimplex3")
+	// local a = a1 - a0
+	// local b = b1 - b0
+	// local c = c1 - c0
+	// local d = d1 - d0
+	let p0=mesh.vert(v0);
+	let p1=mesh.vert(v1);
+	let p2=mesh.vert(v2);
+	let p3=mesh.vert(v3);
+
+	// local p = -a
+	// local u = b - a
+	// local v = c - a
+	// local w = d - a
+	let p=-(p0+point);
+	let mut u=p1-p0;
+	let mut v=p2-p0;
+	let w=p3-p0;
+
+	// local uv = u:Cross(v)
+	// local vw = v:Cross(w)
+	// local wu = w:Cross(u)
+	// local uvw = uv:Dot(w)
+	// local pvw = vw:Dot(p)
+	// local upw = wu:Dot(p)
+	// local uvp = uv:Dot(p)
+	let mut uv=u.cross(v);
+	let vw=v.cross(w);
+	let wu=w.cross(u);
+	let uv_w=uv.dot(w);
+	let pv_w=vw.dot(p);
+	let up_w=wu.dot(p);
+	let uv_p=uv.dot(p);
+
+	// if pvw/uvw >= 0 and upw/uvw >= 0 and uvp/uvw >= 0 then
+	if !pv_w.div_sign(uv_w).is_negative()
+	 ||!up_w.div_sign(uv_w).is_negative()
+	 ||!uv_p.div_sign(uv_w).is_negative(){
+		// origin is contained, this is a positive detection
+		// local direction = Vector3.new(0, 0, 0)
+		// return direction, a0, a1, b0, b1, c0, c1, d0, d1
+		return Reduce::Escape([v0,v1,v2,v3]);
+	}
+
+	// local uvwSign = uvw < 0 and -1 or uvw > 0 and 1 or 0
+	// local uvDist = uvp*uvwSign/uv.magnitude
+	// local vwDist = pvw*uvwSign/vw.magnitude
+	// local wuDist = upw*uvwSign/wu.magnitude
+	// local minDist3 = math.min(uvDist, vwDist, wuDist)
+	let uv_dist=uv_p.mul_sign(uv_w);
+	let vw_dist=pv_w.mul_sign(uv_w);
+	let wu_dist=up_w.mul_sign(uv_w);
+	let wu_len=wu.length();
+	let uv_len=uv.length();
+	let vw_len=vw.length();
+
+	if vw_dist*wu_len<wu_dist*vw_len{
+		// if vwDist == minDist3 then
+		if vw_dist*uv_len<uv_dist*vw_len{
+			(u,v)=(v,w);
+			uv=vw;
+			// uv_p=pv_w; // unused
+			// b0, c0 = c0, d0
+			// b1, c1 = c1, d1
+			(v1,v2)=(v2,v3);
+		}else{
+			v2=v3;
+		}
+	}else{
+		// elseif wuDist == minDist3 then
+		if wu_dist*uv_len<uv_dist*wu_len{
+			(u,v)=(w,u);
+			uv=wu;
+			// uv_p=up_w; // unused
+			// b0, c0 = d0, b0
+			// b1, c1 = d1, b1
+			// before [a,b,c,d]
+			(v1,v2)=(v3,v1);
+			// after [a,d,b]
+		}else{
+			v2=v3;
+		}
+	}
+
+	// local up = u:Cross(p)
+	// local pv = p:Cross(v)
+	// local uv_up = uv:Dot(up)
+	// local uv_pv = uv:Dot(pv)
+	let mut up=u.cross(p);
+	let pv=p.cross(v);
+	let uv_up=uv.dot(up);
+	let uv_pv=uv.dot(pv);
+
+	// if uv_up >= 0 and uv_pv >= 0 then
+	if !uv_up.is_negative()&&!uv_pv.is_negative(){
+		// local direction = uvw < 0 and uv or -uv
+		// return direction, a0, a1, b0, b1, c0, c1
+		if uv_w.is_negative(){
+			return Reduce::Reduced(Reduced{
+				dir:narrow_dir2(uv),
+				simplex:Simplex1_3::Simplex3([v0,v1,v2]),
+			});
+		}else{
+			return Reduce::Reduced(Reduced{
+				dir:narrow_dir2(-uv),
+				simplex:Simplex1_3::Simplex3([v0,v1,v2]),
+			});
+		}
+	}
+
+	// local u_u = u:Dot(u)
+	// local v_v = v:Dot(v)
+	// local uDist = uv_up/(u_u*v.magnitude)
+	// local vDist = uv_pv/(v_v*u.magnitude)
+	// local minDist2 = math.min(uDist, vDist)
+	let u_dist=uv_up*v.length();
+	let v_dist=uv_pv*u.length();
+
+	// if vDist == minDist2 then
+	if v_dist<u_dist{
+		u=v;
+		up=-pv;
+		uv=-uv;
+		// b0 = c0
+		// b1 = c1
+		v1=v2;
+	}
+
+	// local p_u = p:Dot(u)
+	let p_u=p.dot(u);
+
+	// if p_u >= 0 then
+	if !p_u.is_negative(){
+		// local direction = up:Cross(u)
+		let direction=up.cross(u);
+		// if direction.magnitude == 0 then
+		if direction==vec3::zero(){
+			// direction = uvw < 0 and uv or -uv
+			// return direction, a0, a1, b0, b1
+			if uv_w.is_negative(){
+				return Reduce::Reduced(Reduced{
+					dir:narrow_dir2(uv),
+					simplex:Simplex1_3::Simplex2([v0,v1]),
+				});
+			}else{
+				return Reduce::Reduced(Reduced{
+					dir:narrow_dir2(-uv),
+					simplex:Simplex1_3::Simplex2([v0,v1]),
+				});
+			}
+		}
+
+		// return direction, a0, a1, b0, b1
+		return Reduce::Reduced(Reduced{
+			dir:narrow_dir3(direction),
+			simplex:Simplex1_3::Simplex2([v0,v1]),
+		});
+	}
+
+	// local direction = p
+	let dir=p;
+	// if direction.magnitude == 0 then
+	if dir==vec3::zero(){
+		// direction = uvw < 0 and uv or -uv
+		if uv_w.is_negative(){
+			return Reduce::Reduced(Reduced{
+				dir:narrow_dir2(uv),
+				simplex:Simplex1_3::Simplex1([v0]),
+			});
+		}else{
+			return Reduce::Reduced(Reduced{
+				dir:narrow_dir2(-uv),
+				simplex:Simplex1_3::Simplex1([v0]),
+			});
+		}
+	}
+
+	// return direction, a0, a1
+	Reduce::Reduced(Reduced{
+		dir,
+		simplex:Simplex1_3::Simplex1([v0]),
+	})
+}
+
+struct Reduced<Vert>{
+	dir:Planar64Vec3,
+	simplex:Simplex1_3<Vert>,
+}
+
+enum Reduce<Vert>{
+	Escape(Simplex<4,Vert>),
+	Reduced(Reduced<Vert>),
+}
+
+impl<Vert> Simplex2_4<Vert>{
+	fn reduce<M:MeshQuery<Vert=Vert>>(self,mesh:&M,point:Planar64Vec3)->Reduce<Vert>{
+		match self{
+			Self::Simplex2(simplex)=>Reduce::Reduced(reduce2(simplex,mesh,point)),
+			Self::Simplex3(simplex)=>Reduce::Reduced(reduce3(simplex,mesh,point)),
+			Self::Simplex4(simplex)=>reduce4(simplex,mesh,point),
+		}
+	}
+}
+
+pub fn contains_point(mesh:&MinkowskiMesh<'_>,point:Planar64Vec3)->bool{
+	const ENABLE_FAST_FAIL:bool=true;
+	// TODO: remove mesh negation
+	minimum_difference::<ENABLE_FAST_FAIL,_,_>(&-mesh,point,
+		// on_exact
+		|is_intersecting,_simplex|{
+			is_intersecting
+		},
+		// on_escape
+		|_simplex|{
+			// intersection is guaranteed at this point
+			true
+		},
+		// fast_fail value
+		||false
+	)
+}
+
+//infinity fev algorithm state transition
+#[derive(Debug)]
+enum Transition<Vert>{
+	Done,//found closest vert, no edges are better
+	Vert(Vert),//transition to vert
+}
+enum EV<M:MeshQuery>{
+	Vert(M::Vert),
+	Edge(<M::Edge as DirectedEdge>::UndirectedEdge),
+}
+impl<M:MeshQuery> From<EV<M>> for FEV<M>{
+	fn from(value:EV<M>)->Self{
+		match value{
+			EV::Vert(minkowski_vert)=>FEV::Vert(minkowski_vert),
+			EV::Edge(minkowski_edge)=>FEV::Edge(minkowski_edge),
+		}
+	}
+}
+
+trait Contains{
+	fn contains(&self,point:Planar64Vec3)->bool;
+}
+
+// convenience type to check if a point is within some threshold of a plane.
+struct ThickPlane{
+	point:Planar64Vec3,
+	normal:Vector3<Fixed<2,64>>,
+	epsilon:Fixed<3,96>,
+}
+impl ThickPlane{
+	fn new<M:MeshQuery>(mesh:&M,[v0,v1,v2]:Simplex<3,M::Vert>)->Self{
+		let p0=mesh.vert(v0);
+		let p1=mesh.vert(v1);
+		let p2=mesh.vert(v2);
+		let point=p0;
+		let normal=(p1-p0).cross(p2-p0);
+		// Allow ~ 2*sqrt(3) units of thickness on the plane
+		// This is to account for the variance of two voxels across the longest diagonal
+		let epsilon=(normal.length()*(Planar64::EPSILON*3)).wrap_3();
+		Self{point,normal,epsilon}
+	}
+}
+impl Contains for ThickPlane{
+	fn contains(&self,point:Planar64Vec3)->bool{
+		(point-self.point).dot(self.normal).abs()<=self.epsilon
+	}
+}
+
+struct ThickLine{
+	point:Planar64Vec3,
+	dir:Planar64Vec3,
+	epsilon:Fixed<4,128>,
+}
+impl ThickLine{
+	fn new<M:MeshQuery>(mesh:&M,[v0,v1]:Simplex<2,M::Vert>)->Self{
+		let p0=mesh.vert(v0);
+		let p1=mesh.vert(v1);
+		let point=p0;
+		let dir=p1-p0;
+		// Allow ~ 2*sqrt(3) units of thickness on the plane
+		// This is to account for the variance of two voxels across the longest diagonal
+		let epsilon=(dir.length_squared()*(Planar64::EPSILON*3)).widen_4();
+		Self{point,dir,epsilon}
+	}
+}
+impl Contains for ThickLine{
+	fn contains(&self,point:Planar64Vec3)->bool{
+		(point-self.point).cross(self.dir).length_squared()<=self.epsilon
+	}
+}
+
+struct EVFinder<'a,M,C>{
+	mesh:&'a M,
+	constraint:C,
+	best_distance_squared:Fixed<2,64>,
+}
+
+impl<M:MeshQuery,C:Contains> EVFinder<'_,M,C>{
+	fn next_transition_vert(&mut self,vert_id:M::Vert,point:Planar64Vec3)->Transition<M::Vert>{
+		let mut best_transition=Transition::Done;
+		for &directed_edge_id in self.mesh.vert_edges(vert_id).as_ref(){
+			//test if this edge's opposite vertex closer
+			let edge_verts=self.mesh.edge_verts(directed_edge_id.as_undirected());
+			//select opposite vertex
+			let test_vert_id=edge_verts.as_ref()[directed_edge_id.parity() as usize];
+			let test_pos=self.mesh.vert(test_vert_id);
+			let diff=point-test_pos;
+			let distance_squared=diff.dot(diff);
+			// ensure test_vert_id is coplanar to simplex
+			if distance_squared<self.best_distance_squared&&self.constraint.contains(test_pos){
+				best_transition=Transition::Vert(test_vert_id);
+				self.best_distance_squared=distance_squared;
+			}
+		}
+		best_transition
+	}
+	fn final_ev(&mut self,vert_id:M::Vert,point:Planar64Vec3)->EV<M>{
+		let mut best_transition=EV::Vert(vert_id);
+		let vert_pos=self.mesh.vert(vert_id);
+		let diff=point-vert_pos;
+		for &directed_edge_id in self.mesh.vert_edges(vert_id).as_ref(){
+			//test if this edge is closer
+			let edge_verts=self.mesh.edge_verts(directed_edge_id.as_undirected());
+			let test_vert_id=edge_verts.as_ref()[directed_edge_id.parity() as usize];
+			let test_pos=self.mesh.vert(test_vert_id);
+			let edge_n=test_pos-vert_pos;
+			let d=edge_n.dot(diff);
+			//test the edge
+			let edge_nn=edge_n.dot(edge_n);
+			// ensure edge contains closest point and directed_edge_id is coplanar to simplex
+			if !d.is_negative()&&d<=edge_nn&&self.constraint.contains(test_pos){
+				let distance_squared={
+					let c=diff.cross(edge_n);
+					//wrap for speed
+					(c.dot(c)/edge_nn).divide().wrap_2()
+				};
+				if distance_squared<=self.best_distance_squared{
+					best_transition=EV::Edge(directed_edge_id.as_undirected());
+					self.best_distance_squared=distance_squared;
+				}
+			}
+		}
+		best_transition
+	}
+	fn crawl_boundaries(&mut self,mut vert_id:M::Vert,point:Planar64Vec3)->EV<M>{
+		loop{
+			match self.next_transition_vert(vert_id,point){
+				Transition::Done=>return self.final_ev(vert_id,point),
+				Transition::Vert(new_vert_id)=>vert_id=new_vert_id,
+			}
+		}
+	}
+}
+/// This function drops a vertex down to an edge or a face if the path from infinity did not cross any vertex-edge boundaries but the point is supposed to have already crossed a boundary down from a vertex
+fn crawl_to_closest_ev<M:MeshQuery>(mesh:&M,simplex:Simplex<2,M::Vert>,point:Planar64Vec3)->EV<M>{
+	// naively start at the closest vertex
+	// the closest vertex is not necessarily the one with the fewest boundary hops
+	// but it doesn't matter, we will get there regardless.
+	let (vert_id,best_distance_squared)=simplex.into_iter().map(|vert_id|{
+		let diff=point-mesh.vert(vert_id);
+		(vert_id,diff.dot(diff))
+	}).min_by_key(|&(_,d)|d).unwrap();
+
+	let constraint=ThickLine::new(mesh,simplex);
+	let mut finder=EVFinder{constraint,mesh,best_distance_squared};
+	//start on any vertex
+	//cross uncrossable vertex-edge boundaries until you find the closest vertex or edge
+	//cross edge-face boundary if it's uncrossable
+	finder.crawl_boundaries(vert_id,point)
+}
+
+/// This function drops a vertex down to an edge or a face if the path from infinity did not cross any vertex-edge boundaries but the point is supposed to have already crossed a boundary down from a vertex
+fn crawl_to_closest_fev<'a>(mesh:&MinkowskiMesh<'a>,simplex:Simplex<3,MinkowskiVert>,point:Planar64Vec3)->FEV::<MinkowskiMesh<'a>>{
+	// naively start at the closest vertex
+	// the closest vertex is not necessarily the one with the fewest boundary hops
+	// but it doesn't matter, we will get there regardless.
+	let (vert_id,best_distance_squared)=simplex.into_iter().map(|vert_id|{
+		let diff=point-mesh.vert(vert_id);
+		(vert_id,diff.dot(diff))
+	}).min_by_key(|&(_,d)|d).unwrap();
+
+	let constraint=ThickPlane::new(mesh,simplex);
+	let mut finder=EVFinder{constraint,mesh,best_distance_squared};
+	//start on any vertex
+	//cross uncrossable vertex-edge boundaries until you find the closest vertex or edge
+	//cross edge-face boundary if it's uncrossable
+	match finder.crawl_boundaries(vert_id,point){
+		//if a vert is returned, it is the closest point to the infinity point
+		EV::Vert(vert_id)=>FEV::Vert(vert_id),
+		EV::Edge(edge_id)=>{
+			//cross to face if we are on the wrong side
+			let edge_n=mesh.edge_n(edge_id);
+			// point is multiplied by two because vert_sum sums two vertices.
+			let delta_pos=point*2-{
+				let &[v0,v1]=mesh.edge_verts(edge_id).as_ref();
+				mesh.vert(v0)+mesh.vert(v1)
+			};
+			for (i,&face_id) in mesh.edge_faces(edge_id).as_ref().iter().enumerate(){
+				//test if this face is closer
+				let (face_n,d)=mesh.face_nd(face_id);
+				//if test point is behind face, the face is invalid
+				// TODO: find out why I thought of this backwards
+				if !(face_n.dot(point)-d).is_positive(){
+					continue;
+				}
+				//edge-face boundary nd, n facing out of the face towards the edge
+				let boundary_n=face_n.cross(edge_n)*(i as i64*2-1);
+				let boundary_d=boundary_n.dot(delta_pos);
+				//is test point behind edge, i.e. contained in the face
+				if !boundary_d.is_positive(){
+					//both faces cannot pass this condition, return early if one does.
+					return FEV::Face(face_id);
+				}
+			}
+			FEV::Edge(edge_id)
+		},
+	}
+}
+
+pub fn closest_fev_not_inside<'a>(mesh:&MinkowskiMesh<'a>,point:Planar64Vec3)->Option<FEV<MinkowskiMesh<'a>>>{
+	const ENABLE_FAST_FAIL:bool=false;
+	// TODO: remove mesh negation
+	minimum_difference::<ENABLE_FAST_FAIL,_,_>(&-mesh,point,
+		// on_exact
+		|is_intersecting,simplex|{
+			if is_intersecting{
+				return None;
+			}
+			// Convert simplex to FEV
+			// Vertices must be inverted since the mesh is inverted
+			Some(match simplex{
+				Simplex1_3::Simplex1([v0])=>FEV::Vert(-v0),
+				Simplex1_3::Simplex2([v0,v1])=>{
+					// invert
+					let (v0,v1)=(-v0,-v1);
+					let ev=crawl_to_closest_ev(mesh,[v0,v1],point);
+					if !matches!(ev,EV::Edge(_)){
+						println!("I can't believe it's not an edge!");
+					}
+					ev.into()
+				},
+				Simplex1_3::Simplex3([v0,v1,v2])=>{
+					// invert
+					let (v0,v1,v2)=(-v0,-v1,-v2);
+					// Shimmy to the side until you find a face that contains the closest point
+					// it's ALWAYS representable as a face, but this algorithm may
+					// return E or V in edge cases but I don't think that will break the face crawler
+					let fev=crawl_to_closest_fev(mesh,[v0,v1,v2],point);
+					if !matches!(fev,FEV::Face(_)){
+						println!("I can't believe it's not a face!");
+					}
+					fev
+				},
+			})
+		},
+		// on_escape
+		|_simplex|{
+			// intersection is guaranteed at this point
+			// local norm, dist, u0, u1, v0, v1, w0, w1 = expand(queryP, queryQ, a0, a1, b0, b1, c0, c1, d0, d1, 1e-5)
+			// let simplex=refine_to_exact(mesh,simplex);
+			None
+		},
+		// fast_fail value is irrelevant and will never be returned!
+		||unreachable!()
+	)
+}
+
+// local function minimumDifference(
+// 	queryP, radiusP,
+// 	queryQ, radiusQ,
+// 	exitRadius, testIntersection
+// )
+fn minimum_difference<const ENABLE_FAST_FAIL:bool,T,M:MeshQuery>(
+	mesh:&M,
+	point:Planar64Vec3,
+	on_exact:impl FnOnce(bool,Simplex1_3<M::Vert>)->T,
+	on_escape:impl FnOnce(Simplex<4,M::Vert>)->T,
+	on_fast_fail:impl FnOnce()->T,
+)->T{
+	// local initialAxis = queryQ() - queryP()
+	// local new_point_p = queryP(initialAxis)
+	// local new_point_q = queryQ(-initialAxis)
+	// local direction, a0, a1, b0, b1, c0, c1, d0, d1
+	let mut initial_axis=mesh.hint_point()+point;
+	// degenerate case
+	if initial_axis==vec3::zero(){
+		initial_axis=choose_any_direction();
+	}
+	let last_point=mesh.farthest_vert(-initial_axis);
+	// this represents the 'a' value in the commented code
+	let mut last_pos=mesh.vert(last_point);
+	let Reduced{dir:mut direction,simplex:mut simplex_small}=reduce1([last_point],mesh,point);
+
+	// exitRadius = testIntersection and 0 or exitRadius or 1/0
+	// for _ = 1, 100 do
+	loop{
+		// new_point_p = queryP(-direction)
+		// new_point_q = queryQ(direction)
+		// local next_point = new_point_q - new_point_p
+		let next_point=mesh.farthest_vert(direction);
+		let next_pos=mesh.vert(next_point);
+
+		// if -direction:Dot(next_point) > (exitRadius + radiusP + radiusQ)*direction.magnitude then
+		if ENABLE_FAST_FAIL&&direction.dot(next_pos+point).is_negative(){
+			return on_fast_fail();
+		}
+
+		let simplex_big=simplex_small.push_front(next_point);
+
+		// if
+		// 	direction:Dot(next_point - a) <= 0 or
+		// 	absDet(next_point, a, b, c) < 1e-6
+		if !direction.dot(next_pos-last_pos).is_positive()
+		||simplex_big.det_is_zero(mesh){
+			// Found enough information to compute the exact closest point.
+			// local norm = direction.unit
+			// local dist = a:Dot(norm)
+			// local hits = -dist < radiusP + radiusQ
+			let is_intersecting=(last_pos+point).dot(direction).is_positive();
+			return on_exact(is_intersecting,simplex_small);
+		}
+
+		// direction, a0, a1, b0, b1, c0, c1, d0, d1 = reduceSimplex(new_point_p, new_point_q, a0, a1, b0, b1, c0, c1)
+		match simplex_big.reduce(mesh,point){
+			// if a and b and c and d then
+			Reduce::Escape(simplex)=>{
+				// Enough information to conclude that the meshes are intersecting.
+				// Topology information is computed if needed.
+				return on_escape(simplex);
+			},
+			Reduce::Reduced(reduced)=>{
+				direction=reduced.dir;
+				simplex_small=reduced.simplex;
+			},
+		}
+
+		// next loop this will be a
+		last_pos=next_pos;
+	}
+}
+
+#[cfg(test)]
+mod test{
+	use super::*;
+    use crate::model::{PhysicsMesh,PhysicsMeshView};
+
+    fn mesh_contains_point(mesh:PhysicsMeshView<'_>,point:Planar64Vec3)->bool{
+		const ENABLE_FAST_FAIL:bool=true;
+		// TODO: remove mesh negation
+		minimum_difference::<ENABLE_FAST_FAIL,_,_>(&mesh,point,
+			// on_exact
+			|is_intersecting,_simplex|{
+				is_intersecting
+			},
+			// on_escape
+			|_simplex|{
+				// intersection is guaranteed at this point
+				true
+			},
+			// fast_fail value
+			||false
+		)
+	}
+
+	#[test]
+	fn test_cube_points(){
+		let mesh=PhysicsMesh::unit_cube();
+		let mesh_view=mesh.complete_mesh_view();
+		for x in -2..=2{
+			for y in -2..=2{
+				for z in -2..=2{
+					let point=vec3::int(x,y,z)>>1;
+					assert!(mesh_contains_point(mesh_view,point),"Mesh did not contain point {point}");
+				}
+			}
+		}
+	}
+}

engine/physics/src/model.rs

@@ -90,6 +90,10 @@ pub trait MeshQuery{
 		let &[v0,v1]=self.edge_verts(directed_edge_id.as_undirected()).as_ref();
 		(self.vert(v1)-self.vert(v0))*((directed_edge_id.parity() as i64)*2-1)
 	}
+	/// This must return a point inside the mesh.
+	#[expect(dead_code)]
+	fn hint_point(&self)->Planar64Vec3;
+	fn farthest_vert(&self,dir:Planar64Vec3)->Self::Vert;
 	fn vert(&self,vert_id:Self::Vert)->Planar64Vec3;
 	fn face_nd(&self,face_id:Self::Face)->(Self::Normal,Self::Offset);
 	fn face_edges(&self,face_id:Self::Face)->impl AsRef<[Self::Edge]>;
@@ -100,17 +104,21 @@ pub trait MeshQuery{
 }
 #[derive(Debug)]
 struct FaceRefs{
+	// I didn't write it down, but I assume the edges are directed
+	// clockwise when looking towards the face normal, i.e. right hand rule.
 	edges:Vec<SubmeshDirectedEdgeId>,
+	//verts are redundant, use edge[i].verts[0]
 	//verts:Vec<VertId>,
 }
 #[derive(Debug)]
 struct EdgeRefs{
 	faces:[SubmeshFaceId;2],//left, right
-	verts:[SubmeshVertId;2],//bottom, top
+	verts:[SubmeshVertId;2],//start, end
 }
 #[derive(Debug)]
 struct VertRefs{
 	faces:Vec<SubmeshFaceId>,
+	// edges are always directed away from the vert
 	edges:Vec<SubmeshDirectedEdgeId>,
 }
 #[derive(Debug)]
@@ -432,7 +440,7 @@ impl TryFrom<&model::Mesh> for PhysicsMesh{
 	}
 }
 
-#[derive(Debug)]
+#[derive(Debug,Clone,Copy)]
 pub struct PhysicsMeshView<'a>{
 	data:&'a PhysicsMeshData,
 	topology:&'a PhysicsMeshTopology,
@@ -447,6 +455,22 @@ impl MeshQuery for PhysicsMeshView<'_>{
 		let face_idx=self.topology.faces[face_id.get() as usize].get() as usize;
 		(self.data.faces[face_idx].normal,self.data.faces[face_idx].dot)
 	}
+	fn hint_point(&self)->Planar64Vec3{
+		// invariant: meshes always encompass the origin
+		vec3::zero()
+	}
+	fn farthest_vert(&self,dir:Planar64Vec3)->SubmeshVertId{
+		//this happens to be well-defined.  there are no virtual virtices
+		SubmeshVertId::new(
+			self.topology.verts.iter()
+			.enumerate()
+			.max_by_key(|&(_,&vert_id)|
+				dir.dot(self.data.verts[vert_id.get() as usize].0)
+			)
+			//assume there is more than zero vertices.
+			.unwrap().0 as u32
+		)
+	}
 	//ideally I never calculate the vertex position, but I have to for the graphical meshes...
 	fn vert(&self,vert_id:SubmeshVertId)->Planar64Vec3{
 		let vert_idx=self.topology.verts[vert_id.get() as usize].get() as usize;
@@ -485,7 +509,7 @@ impl PhysicsMeshTransform{
 	}
 }
 
-#[derive(Debug)]
+#[derive(Debug,Clone,Copy)]
 pub struct TransformedMesh<'a>{
 	view:PhysicsMeshView<'a>,
 	transform:&'a PhysicsMeshTransform,
@@ -503,17 +527,8 @@ impl TransformedMesh<'_>{
 	pub fn verts<'a>(&'a self)->impl Iterator<Item=Vector3<Fixed<2,64>>>+'a{
 		self.view.data.verts.iter().map(|&Vert(pos)|self.transform.vertex.transform_point3(pos))
 	}
-	fn farthest_vert(&self,dir:Planar64Vec3)->SubmeshVertId{
+	pub fn faces(&self)->impl Iterator<Item=SubmeshFaceId>{
-		//this happens to be well-defined.  there are no virtual virtices
+		(0..self.view.topology.faces.len() as u32).map(SubmeshFaceId::new)
-		SubmeshVertId::new(
-			self.view.topology.verts.iter()
-			.enumerate()
-			.max_by_key(|&(_,&vert_id)|
-				dir.dot(self.transform.vertex.transform_point3(self.view.data.verts[vert_id.get() as usize].0))
-			)
-			//assume there is more than zero vertices.
-			.unwrap().0 as u32
-		)
 	}
 }
 impl MeshQuery for TransformedMesh<'_>{
@@ -532,6 +547,21 @@ impl MeshQuery for TransformedMesh<'_>{
 		// wrap for speed
 		self.transform.vertex.transform_point3(self.view.vert(vert_id)).wrap_1()
 	}
+	fn hint_point(&self)->Planar64Vec3{
+		self.transform.vertex.translation
+	}
+	fn farthest_vert(&self,dir:Planar64Vec3)->SubmeshVertId{
+		//this happens to be well-defined.  there are no virtual virtices
+		SubmeshVertId::new(
+			self.view.topology.verts.iter()
+			.enumerate()
+			.max_by_key(|&(_,&vert_id)|
+				dir.dot(self.transform.vertex.transform_point3(self.view.data.verts[vert_id.get() as usize].0))
+			)
+			//assume there is more than zero vertices.
+			.unwrap().0 as u32
+		)
+	}
 	#[inline]
 	fn face_edges(&self,face_id:SubmeshFaceId)->impl AsRef<[SubmeshDirectedEdgeId]>{
 		self.view.face_edges(face_id)
@@ -558,11 +588,20 @@ impl MeshQuery for TransformedMesh<'_>{
 //(face,vertex)
 //(edge,edge)
 //(vertex,face)
-#[derive(Clone,Copy,Debug)]
+#[derive(Clone,Copy,Debug,Eq,PartialEq)]
 pub enum MinkowskiVert{
 	VertVert(SubmeshVertId,SubmeshVertId),
 }
-#[derive(Clone,Copy,Debug)]
+// TODO: remove this
+impl core::ops::Neg for MinkowskiVert{
+	type Output=Self;
+	fn neg(self)->Self::Output{
+		match self{
+			MinkowskiVert::VertVert(v0,v1)=>MinkowskiVert::VertVert(v1,v0),
+		}
+	}
+}
+#[derive(Clone,Copy,Debug,Eq,PartialEq)]
 pub enum MinkowskiEdge{
 	VertEdge(SubmeshVertId,SubmeshEdgeId),
 	EdgeVert(SubmeshEdgeId,SubmeshVertId),
@@ -577,7 +616,7 @@ impl UndirectedEdge for MinkowskiEdge{
 		}
 	}
 }
-#[derive(Clone,Copy,Debug)]
+#[derive(Clone,Copy,Debug,Eq,PartialEq)]
 pub enum MinkowskiDirectedEdge{
 	VertEdge(SubmeshVertId,SubmeshDirectedEdgeId),
 	EdgeVert(SubmeshDirectedEdgeId,SubmeshVertId),
@@ -598,7 +637,7 @@ impl DirectedEdge for MinkowskiDirectedEdge{
 		}
 	}
 }
-#[derive(Clone,Copy,Debug,Hash,Eq,PartialEq)]
+#[derive(Clone,Copy,Debug,Hash)]
 pub enum MinkowskiFace{
 	VertFace(SubmeshVertId,SubmeshFaceId),
 	EdgeEdge(SubmeshEdgeId,SubmeshEdgeId,bool),
@@ -614,23 +653,20 @@ pub struct MinkowskiMesh<'a>{
 	mesh1:TransformedMesh<'a>,
 }
 
-//infinity fev algorithm state transition
-#[derive(Debug)]
-enum Transition{
-	Done,//found closest vert, no edges are better
-	Vert(MinkowskiVert),//transition to vert
-}
-enum EV{
-	Vert(MinkowskiVert),
-	Edge(MinkowskiEdge),
-}
-
 pub type GigaTime=Ratio<Fixed<4,128>,Fixed<4,128>>;
 pub fn into_giga_time(time:Time,relative_to:Time)->GigaTime{
 	let r=(time-relative_to).to_ratio();
 	Ratio::new(r.num.widen_4(),r.den.widen_4())
 }
 
+// TODO: remove this
+impl<'a> core::ops::Neg for &MinkowskiMesh<'a>{
+	type Output=MinkowskiMesh<'a>;
+	fn neg(self)->Self::Output{
+		MinkowskiMesh::minkowski_sum(self.mesh1,self.mesh0)
+	}
+}
+
 impl MinkowskiMesh<'_>{
 	pub fn minkowski_sum<'a>(mesh0:TransformedMesh<'a>,mesh1:TransformedMesh<'a>)->MinkowskiMesh<'a>{
 		MinkowskiMesh{
@@ -638,140 +674,27 @@ impl MinkowskiMesh<'_>{
 			mesh1,
 		}
 	}
-	fn farthest_vert(&self,dir:Planar64Vec3)->MinkowskiVert{
-		MinkowskiVert::VertVert(self.mesh0.farthest_vert(dir),self.mesh1.farthest_vert(-dir))
-	}
-	fn next_transition_vert(&self,vert_id:MinkowskiVert,best_distance_squared:&mut Fixed<2,64>,infinity_dir:Planar64Vec3,point:Planar64Vec3)->Transition{
-		let mut best_transition=Transition::Done;
-		for &directed_edge_id in self.vert_edges(vert_id).as_ref(){
-			let edge_n=self.directed_edge_n(directed_edge_id);
-			//is boundary uncrossable by a crawl from infinity
-			let edge_verts=self.edge_verts(directed_edge_id.as_undirected());
-			//select opposite vertex
-			let test_vert_id=edge_verts.as_ref()[directed_edge_id.parity() as usize];
-			//test if it's closer
-			let diff=point-self.vert(test_vert_id);
-			if edge_n.dot(infinity_dir).is_zero(){
-				let distance_squared=diff.dot(diff);
-				if distance_squared<*best_distance_squared{
-					best_transition=Transition::Vert(test_vert_id);
-					*best_distance_squared=distance_squared;
-				}
-			}
-		}
-		best_transition
-	}
-	fn final_ev(&self,vert_id:MinkowskiVert,best_distance_squared:&mut Fixed<2,64>,infinity_dir:Planar64Vec3,point:Planar64Vec3)->EV{
-		let mut best_transition=EV::Vert(vert_id);
-		let diff=point-self.vert(vert_id);
-		for &directed_edge_id in self.vert_edges(vert_id).as_ref(){
-			let edge_n=self.directed_edge_n(directed_edge_id);
-			//is boundary uncrossable by a crawl from infinity
-			//check if time of collision is outside Time::MIN..Time::MAX
-			if edge_n.dot(infinity_dir).is_zero(){
-				let d=edge_n.dot(diff);
-				//test the edge
-				let edge_nn=edge_n.dot(edge_n);
-				if !d.is_negative()&&d<=edge_nn{
-					let distance_squared={
-						let c=diff.cross(edge_n);
-						//wrap for speed
-						(c.dot(c)/edge_nn).divide().wrap_2()
-					};
-					if distance_squared<=*best_distance_squared{
-						best_transition=EV::Edge(directed_edge_id.as_undirected());
-						*best_distance_squared=distance_squared;
-					}
-				}
-			}
-		}
-		best_transition
-	}
-	fn crawl_boundaries(&self,mut vert_id:MinkowskiVert,infinity_dir:Planar64Vec3,point:Planar64Vec3)->EV{
-		let mut best_distance_squared={
-			let diff=point-self.vert(vert_id);
-			diff.dot(diff)
-		};
-		loop{
-			match self.next_transition_vert(vert_id,&mut best_distance_squared,infinity_dir,point){
-				Transition::Done=>return self.final_ev(vert_id,&mut best_distance_squared,infinity_dir,point),
-				Transition::Vert(new_vert_id)=>vert_id=new_vert_id,
-			}
-		}
-	}
-	/// This function drops a vertex down to an edge or a face if the path from infinity did not cross any vertex-edge boundaries but the point is supposed to have already crossed a boundary down from a vertex
-	fn infinity_fev(&self,infinity_dir:Planar64Vec3,point:Planar64Vec3)->FEV::<MinkowskiMesh<'_>>{
-		//start on any vertex
-		//cross uncrossable vertex-edge boundaries until you find the closest vertex or edge
-		//cross edge-face boundary if it's uncrossable
-		match self.crawl_boundaries(self.farthest_vert(infinity_dir),infinity_dir,point){
-			//if a vert is returned, it is the closest point to the infinity point
-			EV::Vert(vert_id)=>FEV::Vert(vert_id),
-			EV::Edge(edge_id)=>{
-				//cross to face if the boundary is not crossable and we are on the wrong side
-				let edge_n=self.edge_n(edge_id);
-				// point is multiplied by two because vert_sum sums two vertices.
-				let delta_pos=point*2-{
-					let &[v0,v1]=self.edge_verts(edge_id).as_ref();
-					self.vert(v0)+self.vert(v1)
-				};
-				for (i,&face_id) in self.edge_faces(edge_id).as_ref().iter().enumerate(){
-					let face_n=self.face_nd(face_id).0;
-					//edge-face boundary nd, n facing out of the face towards the edge
-					let boundary_n=face_n.cross(edge_n)*(i as i64*2-1);
-					let boundary_d=boundary_n.dot(delta_pos);
-					//check if time of collision is outside Time::MIN..Time::MAX
-					//infinity_dir can always be treated as a velocity
-					if !boundary_d.is_positive()&&boundary_n.dot(infinity_dir).is_zero(){
-						//both faces cannot pass this condition, return early if one does.
-						return FEV::Face(face_id);
-					}
-				}
-				FEV::Edge(edge_id)
-			},
-		}
-	}
-	// TODO: fundamentally improve this algorithm.
-	// All it needs to do is find the closest point on the mesh
-	// and return the FEV which the point resides on.
-	//
-	// What it actually does is use the above functions to trace a ray in from infinity,
-	// crawling the closest point along the mesh surface until the ray reaches
-	// the starting point to discover the final FEV.
-	//
-	// The actual collision prediction probably does a single test
-	// and then immediately returns with 0 FEV transitions on average,
-	// because of the strict time_limit constraint.
-	//
-	// Most of the calculation time is just calculating the starting point
-	// for the "actual" crawling algorithm below (predict_collision_{in|out}).
-	fn closest_fev_not_inside(&self,mut infinity_body:Body,start_time:Bound<&Time>)->Option<FEV<MinkowskiMesh<'_>>>{
-		infinity_body.infinity_dir().and_then(|dir|{
-			let infinity_fev=self.infinity_fev(-dir,infinity_body.position);
-			//a line is simpler to solve than a parabola
-			infinity_body.velocity=dir;
-			infinity_body.acceleration=vec3::ZERO;
-			//crawl in from negative infinity along a tangent line to get the closest fev
-			infinity_fev.crawl(self,&infinity_body,Bound::Unbounded,start_time).miss()
-		})
-	}
 	pub fn predict_collision_in(&self,relative_body:&Body,range:impl RangeBounds<Time>)->Option<(MinkowskiFace,GigaTime)>{
-		self.closest_fev_not_inside(*relative_body,range.start_bound()).and_then(|fev|{
+		let fev=crate::minimum_difference::closest_fev_not_inside(self,relative_body.position)?;
-			//continue forwards along the body parabola
+		//continue forwards along the body parabola
-			fev.crawl(self,relative_body,range.start_bound(),range.end_bound()).hit()
+		fev.crawl(self,relative_body,range.start_bound(),range.end_bound()).hit()
-		})
 	}
 	pub fn predict_collision_out(&self,relative_body:&Body,range:impl RangeBounds<Time>)->Option<(MinkowskiFace,GigaTime)>{
 		let (lower_bound,upper_bound)=(range.start_bound(),range.end_bound());
+		// TODO: handle unbounded collision using infinity fev
+		let time=match upper_bound{
+			Bound::Included(&time)=>time,
+			Bound::Excluded(&time)=>time,
+			Bound::Unbounded=>unimplemented!("unbounded collision out"),
+		};
+		let fev=crate::minimum_difference::closest_fev_not_inside(self,relative_body.extrapolated_position(time))?;
 		// swap and negate bounds to do a time inversion
 		let (lower_bound,upper_bound)=(upper_bound.map(|&t|-t),lower_bound.map(|&t|-t));
 		let infinity_body=-relative_body;
-		self.closest_fev_not_inside(infinity_body,lower_bound.as_ref()).and_then(|fev|{
+		//continue backwards along the body parabola
-			//continue backwards along the body parabola
+		fev.crawl(self,&infinity_body,lower_bound.as_ref(),upper_bound.as_ref()).hit()
-			fev.crawl(self,&infinity_body,lower_bound.as_ref(),upper_bound.as_ref()).hit()
+			//no need to test -time<time_limit because of the first step
-				//no need to test -time<time_limit because of the first step
+			.map(|(face,time)|(face,-time))
-				.map(|(face,time)|(face,-time))
-		})
 	}
 	pub fn predict_collision_face_out(&self,relative_body:&Body,range:impl RangeBounds<Time>,contact_face_id:MinkowskiFace)->Option<(MinkowskiDirectedEdge,GigaTime)>{
 		// TODO: make better
@@ -801,20 +724,8 @@ impl MinkowskiMesh<'_>{
 		}
 		best_edge
 	}
-	fn infinity_in(&self,infinity_body:Body)->Option<(MinkowskiFace,GigaTime)>{
+	pub fn contains_point(&self,point:Planar64Vec3)->bool{
-		let infinity_fev=self.infinity_fev(-infinity_body.velocity,infinity_body.position);
+		crate::minimum_difference::contains_point(self,point)
-		// Bound::Included means that the surface of the mesh is included in the mesh
-		infinity_fev.crawl(self,&infinity_body,Bound::Unbounded,Bound::Included(&infinity_body.time)).hit()
-	}
-	pub fn is_point_in_mesh(&self,point:Planar64Vec3)->bool{
-		let infinity_body=Body::new(point,vec3::Y,vec3::ZERO,Time::ZERO);
-		//movement must escape the mesh forwards and backwards in time,
-		//otherwise the point is not inside the mesh
-		self.infinity_in(infinity_body)
-    	.is_some_and(|_|
-			self.infinity_in(-infinity_body)
-    		.is_some()
-     	)
 	}
 }
 impl MeshQuery for MinkowskiMesh<'_>{
@@ -853,6 +764,12 @@ impl MeshQuery for MinkowskiMesh<'_>{
 			},
 		}
 	}
+	fn hint_point(&self)->Planar64Vec3{
+		self.mesh0.transform.vertex.translation-self.mesh1.transform.vertex.translation
+	}
+	fn farthest_vert(&self,dir:Planar64Vec3)->MinkowskiVert{
+		MinkowskiVert::VertVert(self.mesh0.farthest_vert(dir),self.mesh1.farthest_vert(-dir))
+	}
 	fn face_edges(&self,face_id:MinkowskiFace)->impl AsRef<[MinkowskiDirectedEdge]>{
 		match face_id{
 			MinkowskiFace::VertFace(v0,f1)=>{

engine/physics/src/physics.rs

@@ -1,4 +1,5 @@
 use std::collections::{HashMap,HashSet};
+use crate::model::DirectedEdge;
 use crate::model::{self as model_physics,PhysicsMesh,PhysicsMeshTransform,TransformedMesh,MeshQuery,PhysicsMeshId,PhysicsSubmeshId};
 use strafesnet_common::bvh;
 use strafesnet_common::map;
@@ -87,7 +88,7 @@ enum JumpDirection{
 impl JumpDirection{
 	fn direction(&self,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,contact:&ContactCollision)->Planar64Vec3{
 		match self{
-			JumpDirection::FromContactNormal=>contact_normal(models,hitbox_mesh,contact),
+			JumpDirection::FromContactNormal=>contact_normal(models,hitbox_mesh,&contact.convex_mesh_id,contact.face_id),
 			&JumpDirection::Exactly(dir)=>dir,
 		}
 	}
@@ -100,7 +101,6 @@ enum TransientAcceleration{
 		time:Time,
 	},
 	//walk target will never be reached
-	#[expect(dead_code)]
 	Unreachable{
 		acceleration:Planar64Vec3,
 	}
@@ -114,8 +114,12 @@ struct ContactMoveState{
 }
 impl TransientAcceleration{
 	fn with_target_diff(target_diff:Planar64Vec3,accel:Planar64,time:Time)->Self{
-		if target_diff==vec3::ZERO{
+		if target_diff==vec3::zero(){
 			TransientAcceleration::Reached
+		}else if accel==Planar64::ZERO{
+			TransientAcceleration::Unreachable{
+				acceleration:vec3::zero()
+			}
 		}else{
 			//normal friction acceleration is clippedAcceleration.dot(normal)*friction
 			TransientAcceleration::Reachable{
@@ -137,7 +141,7 @@ impl TransientAcceleration{
 	}
 	fn acceleration(&self)->Planar64Vec3{
 		match self{
-			TransientAcceleration::Reached=>vec3::ZERO,
+			TransientAcceleration::Reached=>vec3::zero(),
 			&TransientAcceleration::Reachable{acceleration,time:_}=>acceleration,
 			&TransientAcceleration::Unreachable{acceleration}=>acceleration,
 		}
@@ -160,7 +164,7 @@ impl ContactMoveState{
 	}
 }
 fn ground_things(walk_settings:&gameplay_style::WalkSettings,contact:&ContactCollision,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState)->(Planar64Vec3,Planar64Vec3){
-	let normal=contact_normal(models,hitbox_mesh,contact);
+	let normal=contact_normal(models,hitbox_mesh,&contact.convex_mesh_id,contact.face_id);
 	let gravity=touching.base_acceleration(models,style,camera,input_state);
 	let control_dir=style.get_y_control_dir(camera,input_state.controls);
 	let target_velocity=walk_settings.get_walk_target_velocity(control_dir,normal);
@@ -168,7 +172,7 @@ fn ground_things(walk_settings:&gameplay_style::WalkSettings,contact:&ContactCol
 	(gravity,target_velocity_clipped)
 }
 fn ladder_things(ladder_settings:&gameplay_style::LadderSettings,contact:&ContactCollision,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState)->(Planar64Vec3,Planar64Vec3){
-	let normal=contact_normal(models,hitbox_mesh,contact);
+	let normal=contact_normal(models,hitbox_mesh,&contact.convex_mesh_id,contact.face_id);
 	let gravity=touching.base_acceleration(models,style,camera,input_state);
 	let control_dir=style.get_y_control_dir(camera,input_state.controls);
 	let target_velocity=ladder_settings.get_ladder_target_velocity(control_dir,normal);
@@ -193,7 +197,7 @@ impl PhysicsModels{
 		self.contact_attributes.clear();
 		self.intersect_attributes.clear();
 	}
-	fn mesh(&self,convex_mesh_id:ConvexMeshId)->TransformedMesh<'_>{
+	fn mesh(&self,convex_mesh_id:ConvexMeshId<PhysicsModelId>)->TransformedMesh<'_>{
 		let (mesh_id,transform)=match convex_mesh_id.model_id{
 			PhysicsModelId::Contact(model_id)=>{
 				let model=&self.contact_models[&model_id];
@@ -210,25 +214,25 @@ impl PhysicsModels{
 		)
 	}
 	//it's a bit weird to have three functions, but it's always going to be one of these
-	fn contact_mesh(&self,contact:&ContactCollision)->TransformedMesh<'_>{
+	fn contact_mesh(&self,convex_mesh_id:&ConvexMeshId<ContactModelId>)->TransformedMesh<'_>{
-		let model=&self.contact_models[&contact.model_id];
+		let model=&self.contact_models[&convex_mesh_id.model_id];
 		TransformedMesh::new(
-			self.meshes[&model.mesh_id].submesh_view(contact.submesh_id),
+			self.meshes[&model.mesh_id].submesh_view(convex_mesh_id.submesh_id),
 			&model.transform
 		)
 	}
-	fn intersect_mesh(&self,intersect:&IntersectCollision)->TransformedMesh<'_>{
+	fn intersect_mesh(&self,convex_mesh_id:&ConvexMeshId<IntersectModelId>)->TransformedMesh<'_>{
-		let model=&self.intersect_models[&intersect.model_id];
+		let model=&self.intersect_models[&convex_mesh_id.model_id];
 		TransformedMesh::new(
-			self.meshes[&model.mesh_id].submesh_view(intersect.submesh_id),
+			self.meshes[&model.mesh_id].submesh_view(convex_mesh_id.submesh_id),
 			&model.transform
 		)
 	}
 	fn get_model_transform(&self,model_id:ModelId)->Option<&PhysicsMeshTransform>{
 		//ModelId can possibly be a decoration
-		match self.contact_models.get(&ContactModelId::new(model_id.get())){
+		match self.contact_models.get(&model_id.into()){
 			Some(model)=>Some(&model.transform),
-			None=>self.intersect_models.get(&IntersectModelId::new(model_id.get()))
+			None=>self.intersect_models.get(&model_id.into())
 				.map(|model|&model.transform),
 		}
 	}
@@ -283,7 +287,8 @@ impl PhysicsCamera{
 		.clamp(Self::ANGLE_PITCH_LOWER_LIMIT,Self::ANGLE_PITCH_UPPER_LIMIT);
 		mat3::from_rotation_yx(ax,ay)
 	}
-	fn rotation(&self)->Planar64Mat3{
+	#[inline]
+	pub fn rotation(&self)->Planar64Mat3{
 		self.get_rotation(self.clamped_mouse_pos)
 	}
 	#[expect(dead_code)]
@@ -440,7 +445,7 @@ impl StyleHelper for StyleModifiers{
 
 	fn get_control_dir(&self,controls:Controls)->Planar64Vec3{
 		//don't get fancy just do it
-		let mut control_dir:Planar64Vec3=vec3::ZERO;
+		let mut control_dir:Planar64Vec3=vec3::zero();
 		//Apply mask after held check so you can require non-allowed keys to be held for some reason
 		let controls=controls.intersection(self.controls_mask);
 		if controls.contains(Controls::MoveForward){
@@ -479,7 +484,7 @@ impl StyleHelper for StyleModifiers{
 		};
 		let transform=integer::Planar64Affine3::new(
 			mat3::from_diagonal(self.hitbox.halfsize),
-			vec3::ZERO
+			vec3::zero()
 		);
 		HitboxMesh::new(mesh,transform)
 	}
@@ -497,7 +502,7 @@ impl MoveState{
 	//call this after state.move_state is changed
 	fn apply_enum(&self,body:&mut Body,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState){
 		match self{
-			MoveState::Fly=>body.acceleration=vec3::ZERO,
+			MoveState::Fly=>body.acceleration=vec3::zero(),
 			MoveState::Air=>{
 				//calculate base acceleration
 				let a=touching.base_acceleration(models,style,camera,input_state);
@@ -611,7 +616,7 @@ impl MoveState{
 			// TODO: unduplicate this code
 			match self.get_walk_state(){
 				// did you stop touching the thing you were walking on?
-				Some(walk_state)=>if !touching.contacts.contains(&walk_state.contact){
+				Some(walk_state)=>if !touching.contains_contact(&walk_state.contact.convex_mesh_id){
 					self.set_move_state(MoveState::Air,body,touching,models,hitbox_mesh,style,camera,input_state);
 				}else{
 					// stopped touching something else while walking
@@ -642,9 +647,9 @@ impl TryFrom<&gameplay_attributes::CollisionAttributes> for PhysicsCollisionAttr
 }
 #[derive(Clone,Copy,Hash,id::Id,Eq,PartialEq)]
 struct ContactAttributesId(u32);
-impl Into<CollisionAttributesId> for ContactAttributesId{
+impl From<ContactAttributesId> for CollisionAttributesId{
-	fn into(self)->CollisionAttributesId{
+	fn from(value:ContactAttributesId)->CollisionAttributesId{
-		CollisionAttributesId::new(self.0)
+		CollisionAttributesId::new(value.0)
 	}
 }
 impl From<CollisionAttributesId> for ContactAttributesId{
@@ -654,9 +659,9 @@ impl From<CollisionAttributesId> for ContactAttributesId{
 }
 #[derive(Clone,Copy,Hash,id::Id,Eq,PartialEq)]
 struct IntersectAttributesId(u32);
-impl Into<CollisionAttributesId> for IntersectAttributesId{
+impl From<IntersectAttributesId> for CollisionAttributesId{
-	fn into(self)->CollisionAttributesId{
+	fn from(value:IntersectAttributesId)->CollisionAttributesId{
-		CollisionAttributesId::new(self.0)
+		CollisionAttributesId::new(value.0)
 	}
 }
 impl From<CollisionAttributesId> for IntersectAttributesId{
@@ -666,16 +671,26 @@ impl From<CollisionAttributesId> for IntersectAttributesId{
 }
 #[derive(Debug,Clone,Copy,Hash,id::Id,Eq,PartialEq)]
 struct ContactModelId(u32);
-impl Into<ModelId> for ContactModelId{
+impl From<ContactModelId> for ModelId{
-	fn into(self)->ModelId{
+	fn from(value:ContactModelId)->ModelId{
-		ModelId::new(self.get())
+		ModelId::new(value.get())
+	}
+}
+impl From<ModelId> for ContactModelId{
+	fn from(other: ModelId)->Self{
+		Self::new(other.get())
 	}
 }
 #[derive(Debug,Clone,Copy,Hash,id::Id,Eq,PartialEq)]
 struct IntersectModelId(u32);
-impl Into<ModelId> for IntersectModelId{
+impl From<IntersectModelId> for ModelId{
-	fn into(self)->ModelId{
+	fn from(value:IntersectModelId)->ModelId{
-		ModelId::new(self.get())
+		ModelId::new(value.get())
+	}
+}
+impl From<ModelId> for IntersectModelId{
+	fn from(other: ModelId)->Self{
+		Self::new(other.get())
 	}
 }
 #[derive(Debug,Clone,Copy,Hash,Eq,PartialEq)]
@@ -683,9 +698,9 @@ enum PhysicsModelId{
 	Contact(ContactModelId),
 	Intersect(IntersectModelId),
 }
-impl Into<ModelId> for PhysicsModelId{
+impl From<PhysicsModelId> for ModelId{
-	fn into(self)->ModelId{
+	fn from(value:PhysicsModelId)->ModelId{
-		ModelId::new(match self{
+		ModelId::new(match value{
 			PhysicsModelId::Contact(model_id)=>model_id.get(),
 			PhysicsModelId::Intersect(model_id)=>model_id.get(),
 		})
@@ -693,10 +708,18 @@ impl Into<ModelId> for PhysicsModelId{
 }
 //unique physics meshes indexed by this
 #[derive(Debug,Clone,Copy,Eq,Hash,PartialEq)]
-struct ConvexMeshId{
+struct ConvexMeshId<Id>{
-	model_id:PhysicsModelId,
+	model_id:Id,
 	submesh_id:PhysicsSubmeshId,
 }
+impl<Id> ConvexMeshId<Id>{
+	fn map<NewId>(self,model_id:NewId)->ConvexMeshId<NewId>{
+		ConvexMeshId{
+			model_id,
+			submesh_id:self.submesh_id,
+		}
+	}
+}
 struct ContactModel{
 	mesh_id:PhysicsMeshId,
 	attr_id:ContactAttributesId,
@@ -708,50 +731,62 @@ struct IntersectModel{
 	transform:PhysicsMeshTransform,
 }
 
-#[derive(Debug,Clone,Copy,Eq,Hash,PartialEq)]
+#[derive(Debug,Clone,Copy,Hash)]
 pub struct ContactCollision{
+	convex_mesh_id:ConvexMeshId<ContactModelId>,
 	face_id:model_physics::MinkowskiFace,
-	model_id:ContactModelId,
-	submesh_id:PhysicsSubmeshId,
 }
 #[derive(Debug,Clone,Copy,Eq,Hash,PartialEq)]
 pub struct IntersectCollision{
-	model_id:IntersectModelId,
+	convex_mesh_id:ConvexMeshId<IntersectModelId>,
-	submesh_id:PhysicsSubmeshId,
 }
-#[derive(Debug,Clone,Eq,Hash,PartialEq)]
+#[derive(Debug,Clone,Hash)]
 pub enum Collision{
 	Contact(ContactCollision),
 	Intersect(IntersectCollision),
 }
 impl Collision{
-	const fn new(convex_mesh_id:ConvexMeshId,face_id:model_physics::MinkowskiFace)->Self{
+	fn new(convex_mesh_id:ConvexMeshId<PhysicsModelId>,face_id:model_physics::MinkowskiFace)->Self{
 		match convex_mesh_id.model_id{
-			PhysicsModelId::Contact(model_id)=>Collision::Contact(ContactCollision{model_id,submesh_id:convex_mesh_id.submesh_id,face_id}),
+			PhysicsModelId::Contact(model_id)=>Collision::Contact(ContactCollision{convex_mesh_id:convex_mesh_id.map(model_id),face_id}),
-			PhysicsModelId::Intersect(model_id)=>Collision::Intersect(IntersectCollision{model_id,submesh_id:convex_mesh_id.submesh_id}),
+			PhysicsModelId::Intersect(model_id)=>Collision::Intersect(IntersectCollision{convex_mesh_id:convex_mesh_id.map(model_id)}),
 		}
 	}
 }
 #[derive(Clone,Debug,Default)]
 struct TouchingState{
-	contacts:HashSet<ContactCollision>,
+	// This is kind of jank, it's a ContactCollision
-	intersects:HashSet<IntersectCollision>,
+	// but split over the Key and Value of the HashMap.
+	contacts:HashMap<ConvexMeshId<ContactModelId>,model_physics::MinkowskiFace>,
+	intersects:HashSet<ConvexMeshId<IntersectModelId>>,
 }
 impl TouchingState{
 	fn clear(&mut self){
 		self.contacts.clear();
 		self.intersects.clear();
 	}
-	fn insert(&mut self,collision:Collision)->bool{
+	fn insert_contact(&mut self,contact:ContactCollision)->Option<model_physics::MinkowskiFace>{
-		match collision{
+		self.contacts.insert(contact.convex_mesh_id,contact.face_id)
-			Collision::Contact(collision)=>self.contacts.insert(collision),
-			Collision::Intersect(collision)=>self.intersects.insert(collision),
-		}
 	}
-	fn remove(&mut self,collision:&Collision)->bool{
+	fn insert_intersect(&mut self,intersect:IntersectCollision)->bool{
-		match collision{
+		self.intersects.insert(intersect.convex_mesh_id)
-			Collision::Contact(collision)=>self.contacts.remove(collision),
+	}
-			Collision::Intersect(collision)=>self.intersects.remove(collision),
+	fn remove_contact(&mut self,convex_mesh_id:&ConvexMeshId<ContactModelId>)->Option<model_physics::MinkowskiFace>{
+		self.contacts.remove(convex_mesh_id)
+	}
+	fn remove_intersect(&mut self,convex_mesh_id:&ConvexMeshId<IntersectModelId>)->bool{
+		self.intersects.remove(convex_mesh_id)
+	}
+	fn contains_contact(&self,convex_mesh_id:&ConvexMeshId<ContactModelId>)->bool{
+		self.contacts.contains_key(convex_mesh_id)
+	}
+	fn contains_intersect(&self,convex_mesh_id:&ConvexMeshId<IntersectModelId>)->bool{
+		self.intersects.contains(convex_mesh_id)
+	}
+	fn contains(&self,convex_mesh_id:&ConvexMeshId<PhysicsModelId>)->bool{
+		match convex_mesh_id.model_id{
+			PhysicsModelId::Contact(contact_model_id)=>self.contains_contact(&convex_mesh_id.map(contact_model_id)),
+			PhysicsModelId::Intersect(intersect_model_id)=>self.contains_intersect(&convex_mesh_id.map(intersect_model_id)),
 		}
 	}
 	fn base_acceleration(&self,models:&PhysicsModels,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState)->Planar64Vec3{
@@ -760,7 +795,7 @@ impl TouchingState{
 			a+=rocket_settings.acceleration(style.get_propulsion_control_dir(camera,input_state.controls));
 		}
 		//add accelerators
-		for contact in &self.contacts{
+		for contact in self.contacts.keys(){
 			if let Some(accelerator)=&models.contact_attr(contact.model_id).general.accelerator{
 				a+=accelerator.acceleration;
 			}
@@ -774,10 +809,10 @@ impl TouchingState{
 		a
 	}
 	fn constrain_velocity(&self,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,velocity:Planar64Vec3)->Planar64Vec3{
-		let contacts:Vec<_>=self.contacts.iter().map(|contact|{
+		let contacts:Vec<_>=self.contacts.iter().map(|(convex_mesh_id,face_id)|{
-			let n=contact_normal(models,hitbox_mesh,contact);
+			let n=contact_normal(models,hitbox_mesh,convex_mesh_id,*face_id);
 			crate::push_solve::Contact{
-				position:vec3::ZERO,
+				position:vec3::zero(),
 				velocity:n,
 				normal:n,
 			}
@@ -785,10 +820,10 @@ impl TouchingState{
 		crate::push_solve::push_solve(&contacts,velocity)
 	}
 	fn constrain_acceleration(&self,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,acceleration:Planar64Vec3)->Planar64Vec3{
-		let contacts:Vec<_>=self.contacts.iter().map(|contact|{
+		let contacts:Vec<_>=self.contacts.iter().map(|(convex_mesh_id,face_id)|{
-			let n=contact_normal(models,hitbox_mesh,contact);
+			let n=contact_normal(models,hitbox_mesh,convex_mesh_id,*face_id);
 			crate::push_solve::Contact{
-				position:vec3::ZERO,
+				position:vec3::zero(),
 				velocity:n,
 				normal:n,
 			}
@@ -798,29 +833,29 @@ impl TouchingState{
 	fn predict_collision_end(&self,collector:&mut instruction::InstructionCollector<InternalInstruction,Time>,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,body:&Body,start_time:Time){
 		// let relative_body=body.relative_to(&Body::ZERO);
 		let relative_body=body;
-		for contact in &self.contacts{
+		for (convex_mesh_id,face_id) in &self.contacts{
 			//detect face slide off
-			let model_mesh=models.contact_mesh(contact);
+			let model_mesh=models.contact_mesh(convex_mesh_id);
 			let minkowski=model_physics::MinkowskiMesh::minkowski_sum(model_mesh,hitbox_mesh.transformed_mesh());
-			collector.collect(minkowski.predict_collision_face_out(&relative_body,start_time..collector.time(),contact.face_id).map(|(_face,time)|{
+			collector.collect(minkowski.predict_collision_face_out(&relative_body,start_time..collector.time(),*face_id).map(|(_face,time)|{
 				TimedInstruction{
 					time:relative_body.time+time.into(),
 					instruction:InternalInstruction::CollisionEnd(
-						Collision::Contact(*contact),
+						Collision::Contact(ContactCollision{face_id:*face_id,convex_mesh_id:*convex_mesh_id}),
 						time
 					),
 				}
 			}));
 		}
-		for intersect in &self.intersects{
+		for convex_mesh_id in &self.intersects{
 			//detect model collision in reverse
-			let model_mesh=models.intersect_mesh(intersect);
+			let model_mesh=models.intersect_mesh(convex_mesh_id);
 			let minkowski=model_physics::MinkowskiMesh::minkowski_sum(model_mesh,hitbox_mesh.transformed_mesh());
 			collector.collect(minkowski.predict_collision_out(&relative_body,start_time..collector.time()).map(|(_face,time)|{
 				TimedInstruction{
 					time:relative_body.time+time.into(),
 					instruction:InternalInstruction::CollisionEnd(
-						Collision::Intersect(*intersect),
+						Collision::Intersect(IntersectCollision{convex_mesh_id:*convex_mesh_id}),
 						time
 					),
 				}
@@ -947,7 +982,7 @@ impl PhysicsState{
 // shared geometry for simulations
 pub struct PhysicsData{
 	//permanent map data
-	bvh:bvh::BvhNode<ConvexMeshId>,
+	bvh:bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	//transient map/environment data (open world loads/unloads parts of this data)
 	models:PhysicsModels,
 	//semi-transient data
@@ -964,6 +999,45 @@ impl PhysicsData{
 			hitbox_mesh:StyleModifiers::default().calculate_mesh(),
 		}
 	}
+	pub fn trace_ray(&self,ray:strafesnet_common::ray::Ray)->Option<ModelId>{
+		let (_time,convex_mesh_id)=self.bvh.sample_ray(&ray,Time::ZERO,Time::MAX/4,|&model,ray|{
+			let mesh=self.models.mesh(model);
+			// brute force trace every face
+			let faces=mesh.faces().filter_map(|face_id|{
+				let (n,d)=mesh.face_nd(face_id);
+				// trace ray onto face
+				// n.(o+d*t)==n.p
+				// n.o + n.d * t == n.p
+				// t == (n.p - n.o)/n.d
+				let nd=n.dot(ray.direction);
+				if nd.is_zero(){
+					return None;
+				}
+				let t=(d-n.dot(ray.origin))/nd;
+				Some((face_id,t,n))
+			});
+			let mut min=None;
+			for (face_id,t,n) in faces{
+				if let Some(min)=min&&min<t{
+					continue;
+				}
+				// check if point of intersection is behind face edges
+				// *2 because average of 2 vertices
+				let p=ray.extrapolate(t)*2;
+				let is_inside_face=mesh.face_edges(face_id).as_ref().iter().all(|&directed_edge_id|{
+					let edge_n=mesh.directed_edge_n(directed_edge_id);
+					let cross_n=edge_n.cross(n);
+					let &[vert0,vert1]=mesh.edge_verts(directed_edge_id.as_undirected()).as_ref();
+					cross_n.dot(p)<cross_n.dot(mesh.vert(vert0)+mesh.vert(vert1))
+				});
+				if is_inside_face{
+					min=Some(t);
+				}
+			}
+			min.map(Into::into)
+		})?;
+		Some(convex_mesh_id.model_id.into())
+	}
 	pub fn new(map:&map::CompleteMap)->Self{
 		let modes=map.modes.clone().denormalize();
 		let mut used_contact_attributes=Vec::new();
@@ -1033,14 +1107,16 @@ impl PhysicsData{
 			let transform=PhysicsMeshTransform::new(model.transform);
 			match attr_id{
 				PhysicsAttributesId::Contact(attr_id)=>{
-					contact_models.insert(ContactModelId::new(model_id as u32),ContactModel{
+					let contact_model_id=ContactModelId::new(model_id as u32);
+					contact_models.insert(contact_model_id,ContactModel{
 						mesh_id,
 						attr_id,
 						transform,
 					});
 				},
 				PhysicsAttributesId::Intersect(attr_id)=>{
-					intersect_models.insert(IntersectModelId::new(model_id as u32),IntersectModel{
+					let intersect_model_id=IntersectModelId::new(model_id as u32);
+					intersect_models.insert(intersect_model_id,IntersectModel{
 						mesh_id,
 						attr_id,
 						transform,
@@ -1054,12 +1130,23 @@ impl PhysicsData{
 				(PhysicsMeshId::new(mesh_id as u32),mesh)
 			).collect();
 		let convex_mesh_aabb_list=
-		//map the two lists into a single type so they can be processed with one closure
+		// use the map models iteration order to ensure that the
-		contact_models.iter().map(|(&model_id,model)|
+		// order that the models are passed into bvh::generate_bvh is consistent
-			(PhysicsModelId::Contact(model_id),&model.mesh_id,&model.transform)
+		map.models.iter().enumerate().filter_map(|(model_id,model)|{
-		).chain(intersect_models.iter().map(|(&model_id,model)|
+			match map.attributes.get(model.attributes.get() as usize){
-			(PhysicsModelId::Intersect(model_id),&model.mesh_id,&model.transform)
+				None|Some(gameplay_attributes::CollisionAttributes::Decoration)=>None,
-		))
+				Some(gameplay_attributes::CollisionAttributes::Contact(_))=>{
+					let model_id=ContactModelId::new(model_id as u32);
+					let model=contact_models.get(&model_id)?;
+					Some((PhysicsModelId::Contact(model_id),&model.mesh_id,&model.transform))
+				},
+				Some(gameplay_attributes::CollisionAttributes::Intersect(_))=>{
+					let model_id=IntersectModelId::new(model_id as u32);
+					let model=intersect_models.get(&model_id)?;
+					Some((PhysicsModelId::Intersect(model_id),&model.mesh_id,&model.transform))
+				},
+			}
+		})
 		.flat_map(|(model_id,mesh_id,transform)|{
 			meshes[mesh_id].submesh_views()
 			.enumerate().map(move|(submesh_id,view)|{
@@ -1161,21 +1248,19 @@ impl<'a> PhysicsContext<'a>{
 		//relative to moving platforms
 		//let relative_body=state.body.relative_to(&Body::ZERO);
 		let relative_body=&state.body;
-		data.bvh.sample_aabb(&aabb,&mut |&convex_mesh_id|{
+		data.bvh.sample_aabb(&aabb,&mut |convex_mesh_id|{
+			if state.touching.contains(convex_mesh_id){
+				return;
+			}
 			//no checks are needed because of the time limits.
-			let model_mesh=data.models.mesh(convex_mesh_id);
+			let model_mesh=data.models.mesh(*convex_mesh_id);
 			let minkowski=model_physics::MinkowskiMesh::minkowski_sum(model_mesh,data.hitbox_mesh.transformed_mesh());
 			collector.collect(minkowski.predict_collision_in(relative_body,state.time..collector.time())
-				//temp (?) code to avoid collision loops
+				.map(|(face,dt)|
-				.and_then(|(face,dt)|{
-					// this must be rounded to avoid the infinite loop when hitting the start zone
-					let time=relative_body.time+dt.into();
-					(state.time<time).then_some((time,face,dt))
-				}).map(|(time,face,dt)|
 					TimedInstruction{
-						time,
+						time:relative_body.time+dt.into(),
 						instruction:InternalInstruction::CollisionStart(
-							Collision::new(convex_mesh_id,face),
+							Collision::new(*convex_mesh_id,face),
 							dt
 						)
 					}
@@ -1186,12 +1271,17 @@ impl<'a> PhysicsContext<'a>{
 	}
 
 
-fn contact_normal(models:&PhysicsModels,hitbox_mesh:&HitboxMesh,contact:&ContactCollision)->Planar64Vec3{
+fn contact_normal(
-	let model_mesh=models.contact_mesh(contact);
+	models:&PhysicsModels,
+	hitbox_mesh:&HitboxMesh,
+	convex_mesh_id:&ConvexMeshId<ContactModelId>,
+    face_id:model_physics::MinkowskiFace,
+)->Planar64Vec3{
+	let model_mesh=models.contact_mesh(convex_mesh_id);
 	let minkowski=model_physics::MinkowskiMesh::minkowski_sum(model_mesh,hitbox_mesh.transformed_mesh());
 	// TODO: normalize to i64::MAX>>1
 	// wrap for speed
-	minkowski.face_nd(contact.face_id).0.wrap_1()
+	minkowski.face_nd(face_id).0.wrap_1()
 }
 
 fn recalculate_touching(
@@ -1203,7 +1293,7 @@ fn recalculate_touching(
 	mode:Option<&gameplay_modes::Mode>,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1212,11 +1302,11 @@ fn recalculate_touching(
 	//collision_end all existing contacts
 	//I would have preferred while let Some(contact)=contacts.pop()
 	//but there is no such method
-	while let Some(&contact)=touching.contacts.iter().next(){
+	while let Some((&convex_mesh_id,_face_id))=touching.contacts.iter().next(){
-		collision_end_contact(move_state,body,touching,models,hitbox_mesh,style,camera,input_state,models.contact_attr(contact.model_id),contact)
+		collision_end_contact(move_state,body,touching,models,hitbox_mesh,style,camera,input_state,models.contact_attr(convex_mesh_id.model_id),&convex_mesh_id)
 	}
-	while let Some(&intersect)=touching.intersects.iter().next(){
+	while let Some(&convex_mesh_id)=touching.intersects.iter().next(){
-		collision_end_intersect(move_state,body,touching,models,hitbox_mesh,style,camera,input_state,mode,run,models.intersect_attr(intersect.model_id),intersect,time);
+		collision_end_intersect(move_state,body,touching,models,hitbox_mesh,style,camera,input_state,mode,run,models.intersect_attr(convex_mesh_id.model_id),&convex_mesh_id,time);
 	}
 	//find all models in the teleport region
 	let mut aabb=aabb::Aabb::default();
@@ -1228,7 +1318,7 @@ fn recalculate_touching(
 		//no checks are needed because of the time limits.
 		let model_mesh=models.mesh(convex_mesh_id);
 		let minkowski=model_physics::MinkowskiMesh::minkowski_sum(model_mesh,hitbox_mesh.transformed_mesh());
-		if minkowski.is_point_in_mesh(body.position){
+		if minkowski.contains_point(body.position){
 			match convex_mesh_id.model_id{
 				//being inside of contact objects is an invalid physics state
 				//but the physics isn't advanced enough to do anything about it yet
@@ -1238,8 +1328,7 @@ fn recalculate_touching(
 				collision_start_intersect(move_state,body,mode_state,touching,mode,run,models,hitbox_mesh,bvh,style,camera,input_state,
 					models.intersect_attr(model_id),
 					IntersectCollision{
-						model_id,
+						convex_mesh_id:convex_mesh_id.map(model_id),
-						submesh_id:convex_mesh_id.submesh_id,
 					},
 					time,
 				),
@@ -1257,7 +1346,7 @@ fn set_position(
 	mode:Option<&gameplay_modes::Mode>,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1273,8 +1362,8 @@ fn set_position(
 fn set_velocity_cull(body:&mut Body,touching:&mut TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,v:Planar64Vec3)->bool{
 	//This is not correct but is better than what I have
 	let mut culled=false;
-	touching.contacts.retain(|contact|{
+	touching.contacts.retain(|convex_mesh_id,face_id|{
-		let n=contact_normal(models,hitbox_mesh,contact);
+		let n=contact_normal(models,hitbox_mesh,convex_mesh_id,*face_id);
 		let r=n.dot(v).is_positive();
 		if r{
 			culled=true;
@@ -1291,8 +1380,8 @@ fn set_velocity(body:&mut Body,touching:&TouchingState,models:&PhysicsModels,hit
 fn set_acceleration_cull(body:&mut Body,touching:&mut TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,a:Planar64Vec3)->bool{
 	//This is not correct but is better than what I have
 	let mut culled=false;
-	touching.contacts.retain(|contact|{
+	touching.contacts.retain(|convex_mesh_id,face_id|{
-		let n=contact_normal(models,hitbox_mesh,contact);
+		let n=contact_normal(models,hitbox_mesh,convex_mesh_id,*face_id);
 		let r=n.dot(a).is_positive();
 		if r{
 			culled=true;
@@ -1316,7 +1405,7 @@ fn teleport(
 	mode:Option<&gameplay_modes::Mode>,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1338,7 +1427,7 @@ fn teleport_to_spawn(
 	mode:&gameplay_modes::Mode,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1427,7 +1516,7 @@ fn run_teleport_behaviour(
 	mode_state:&mut ModeState,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1474,7 +1563,7 @@ fn run_teleport_behaviour(
 	}
 }
 
-fn not_spawn_at(
+fn is_not_spawn_at(
 	mode:Option<&gameplay_modes::Mode>,
 	model_id:ModelId,
 )->bool{
@@ -1495,7 +1584,7 @@ fn collision_start_contact(
 	mode:Option<&gameplay_modes::Mode>,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1505,12 +1594,12 @@ fn collision_start_contact(
 ){
 	let incident_velocity=body.velocity;
 	//add to touching
-	touching.insert(Collision::Contact(contact));
+	touching.insert_contact(contact);
 	//clip v
 	set_velocity(body,touching,models,hitbox_mesh,incident_velocity);
 	let mut allow_jump=true;
-	let model_id=contact.model_id.into();
+	let model_id=contact.convex_mesh_id.model_id.into();
-	let mut allow_run_teleport_behaviour=not_spawn_at(mode,model_id);
+	let mut allow_run_teleport_behaviour=is_not_spawn_at(mode,model_id);
 	match &attr.contacting.contact_behaviour{
 		Some(gameplay_attributes::ContactingBehaviour::Surf)=>(),
 		Some(gameplay_attributes::ContactingBehaviour::Cling)=>println!("Unimplemented!"),
@@ -1524,7 +1613,7 @@ fn collision_start_contact(
 				//kill v
 				//actually you could do this with a booster attribute :thinking:
 				//it's a little bit different because maybe you want to chain ladders together
-				set_velocity(body,touching,models,hitbox_mesh,vec3::ZERO);//model.velocity
+				set_velocity(body,touching,models,hitbox_mesh,vec3::zero());//model.velocity
 			}
 			//ladder walkstate
 			let (gravity,target_velocity)=ladder_things(ladder_settings,&contact,touching,models,hitbox_mesh,style,camera,input_state);
@@ -1533,7 +1622,7 @@ fn collision_start_contact(
 		},
 		Some(gameplay_attributes::ContactingBehaviour::NoJump)=>allow_jump=false,
 		None=>if let Some(walk_settings)=&style.walk{
-			if walk_settings.is_slope_walkable(contact_normal(models,hitbox_mesh,&contact),vec3::Y){
+			if walk_settings.is_slope_walkable(contact_normal(models,hitbox_mesh,&contact.convex_mesh_id,contact.face_id),vec3::Y){
 				allow_run_teleport_behaviour=true;
 				//ground
 				let (gravity,target_velocity)=ground_things(walk_settings,&contact,touching,models,hitbox_mesh,style,camera,input_state);
@@ -1598,7 +1687,7 @@ fn collision_start_intersect(
 	run:&mut run::Run,
 	models:&PhysicsModels,
 	hitbox_mesh:&HitboxMesh,
-	bvh:&bvh::BvhNode<ConvexMeshId>,
+	bvh:&bvh::BvhNode<ConvexMeshId<PhysicsModelId>>,
 	style:&StyleModifiers,
 	camera:&PhysicsCamera,
 	input_state:&InputState,
@@ -1607,13 +1696,13 @@ fn collision_start_intersect(
 	time:Time,
 ){
 	//I think that setting the velocity to 0 was preventing surface contacts from entering an infinite loop
-	touching.insert(Collision::Intersect(intersect));
+	touching.insert_intersect(intersect);
 	//insta booster!
 	if let Some(booster)=&attr.general.booster{
 		move_state.cull_velocity(booster.boost(body.velocity),body,touching,models,hitbox_mesh,style,camera,input_state);
 	}
 	if let Some(mode)=mode{
-		let zone=mode.get_zone(intersect.model_id.into());
+		let zone=mode.get_zone(intersect.convex_mesh_id.model_id.into());
 		match zone{
 			Some(gameplay_modes::Zone::Start)=>{
 				println!("@@@@ Starting new run!");
@@ -1630,7 +1719,7 @@ fn collision_start_intersect(
 		}
 	}
 	move_state.apply_enum_and_body(body,touching,models,hitbox_mesh,style,camera,input_state);
-	run_teleport_behaviour(intersect.model_id.into(),attr.general.wormhole.as_ref(),mode,move_state,body,touching,run,mode_state,models,hitbox_mesh,bvh,style,camera,input_state,time);
+	run_teleport_behaviour(intersect.convex_mesh_id.model_id.into(),attr.general.wormhole.as_ref(),mode,move_state,body,touching,run,mode_state,models,hitbox_mesh,bvh,style,camera,input_state,time);
 }
 
 fn collision_end_contact(
@@ -1643,15 +1732,17 @@ fn collision_end_contact(
 	camera:&PhysicsCamera,
 	input_state:&InputState,
 	_attr:&gameplay_attributes::ContactAttributes,
-	contact:ContactCollision,
+	convex_mesh_id:&ConvexMeshId<ContactModelId>,
 ){
-	touching.remove(&Collision::Contact(contact));//remove contact before calling contact_constrain_acceleration
+	touching.remove_contact(convex_mesh_id);//remove contact before calling contact_constrain_acceleration
 	//check ground
 	//TODO do better
 	//this is inner code from move_state.cull_velocity
 	match move_state.get_walk_state(){
 		// did you stop touching the thing you were walking on?
-		Some(walk_state)=>if walk_state.contact==contact{
+		// This does not check the face! Is that a bad thing? It should be
+		// impossible to stop touching a different face than you started touching...
+		Some(walk_state)=>if &walk_state.contact.convex_mesh_id==convex_mesh_id{
 			move_state.set_move_state(MoveState::Air,body,touching,models,hitbox_mesh,style,camera,input_state);
 		}else{
 			// stopped touching something else while walking
@@ -1673,13 +1764,13 @@ fn collision_end_intersect(
 	mode:Option<&gameplay_modes::Mode>,
 	run:&mut run::Run,
 	_attr:&gameplay_attributes::IntersectAttributes,
-	intersect:IntersectCollision,
+	convex_mesh_id:&ConvexMeshId<IntersectModelId>,
 	time:Time,
 ){
-	touching.remove(&Collision::Intersect(intersect));
+	touching.remove_intersect(convex_mesh_id);
 	move_state.apply_enum_and_body(body,touching,models,hitbox_mesh,style,camera,input_state);
 	if let Some(mode)=mode{
-		let zone=mode.get_zone(intersect.model_id.into());
+		let zone=mode.get_zone(convex_mesh_id.model_id.into());
 		match zone{
 			Some(gameplay_modes::Zone::Start)=>{
 				match run.start(time){
@@ -1713,7 +1804,7 @@ fn atomic_internal_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:Tim
 						&mut state.move_state,&mut state.body,&mut state.mode_state,&mut state.touching,&mut state.run,
 						mode,
 						&data.models,&data.hitbox_mesh,&data.bvh,&state.style,&state.camera,&state.input_state,
-						data.models.contact_attr(contact.model_id),
+						data.models.contact_attr(contact.convex_mesh_id.model_id),
 						contact,
 						state.time,
 					),
@@ -1721,7 +1812,7 @@ fn atomic_internal_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:Tim
 						&mut state.move_state,&mut state.body,&mut state.mode_state,&mut state.touching,
 						mode,
 						&mut state.run,&data.models,&data.hitbox_mesh,&data.bvh,&state.style,&state.camera,&state.input_state,
-						data.models.intersect_attr(intersect.model_id),
+						data.models.intersect_attr(intersect.convex_mesh_id.model_id),
 						intersect,
 						state.time,
 					),
@@ -1730,15 +1821,15 @@ fn atomic_internal_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:Tim
 			InternalInstruction::CollisionEnd(collision,_)=>match collision{
 				Collision::Contact(contact)=>collision_end_contact(
 					&mut state.move_state,&mut state.body,&mut state.touching,&data.models,&data.hitbox_mesh,&state.style,&state.camera,&state.input_state,
-					data.models.contact_attr(contact.model_id),
+					data.models.contact_attr(contact.convex_mesh_id.model_id),
-					contact
+					&contact.convex_mesh_id
 				),
 				Collision::Intersect(intersect)=>collision_end_intersect(
 					&mut state.move_state,&mut state.body,&mut state.touching,&data.models,&data.hitbox_mesh,&state.style,&state.camera,&state.input_state,
 					data.modes.get_mode(state.mode_state.get_mode_id()),
 					&mut state.run,
-					data.models.intersect_attr(intersect.model_id),
+					data.models.intersect_attr(intersect.convex_mesh_id.model_id),
-					intersect,
+					&intersect.convex_mesh_id,
 					state.time
 				),
 			},
@@ -1749,7 +1840,7 @@ fn atomic_internal_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:Tim
 					if strafe_settings.activates(controls){
 						let masked_controls=strafe_settings.mask(controls);
 						let control_dir=state.style.get_control_dir(masked_controls);
-						if control_dir!=vec3::ZERO{
+						if control_dir!=vec3::zero(){
 							let camera_mat=state.camera.simulate_move_rotation_y(state.input_state.lerp_delta(state.time).x);
 							if let Some(ticked_velocity)=strafe_settings.tick_velocity(state.body.velocity,(camera_mat*control_dir).with_length(Planar64::ONE).divide().wrap_1()){
 								//this is wrong but will work ig
@@ -1772,7 +1863,7 @@ fn atomic_internal_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:Tim
 						//which means that gravity can be fully cancelled
 						//ignore moving platforms for now
 						let target=core::mem::replace(&mut walk_state.target,TransientAcceleration::Reached);
-						set_acceleration(&mut state.body,&state.touching,&data.models,&data.hitbox_mesh,vec3::ZERO);
+						set_acceleration(&mut state.body,&state.touching,&data.models,&data.hitbox_mesh,vec3::zero());
 						// check what the target was to see if it was invalid
 						match target{
 							//you are not supposed to reach a walk target which is already reached!
@@ -1836,7 +1927,7 @@ fn atomic_input_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:TimedI
 			if let Some(walk_state)=state.move_state.get_walk_state(){
 				if let Some(jump_settings)=&state.style.jump{
 					let jump_dir=walk_state.jump_direction.direction(&data.models,&data.hitbox_mesh,&walk_state.contact);
-					let booster_option=data.models.contact_attr(walk_state.contact.model_id).general.booster.as_ref();
+					let booster_option=data.models.contact_attr(walk_state.contact.convex_mesh_id.model_id).general.booster.as_ref();
 					let jumped_velocity=jump_settings.jumped_velocity(&state.style,jump_dir,state.body.velocity,booster_option);
 					state.cull_velocity(data,jumped_velocity);
 				}
@@ -1854,7 +1945,7 @@ fn atomic_input_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:TimedI
 		},
 		Instruction::Mode(ModeInstruction::Restart(mode_id))=>{
 			//teleport to mode start zone
-			let mut spawn_point=vec3::ZERO;
+			let mut spawn_point=vec3::zero();
 			let mode=data.modes.get_mode(mode_id);
 			if let Some(mode)=mode{
 				// set style
@@ -1867,7 +1958,7 @@ fn atomic_input_instruction(state:&mut PhysicsState,data:&PhysicsData,ins:TimedI
 				}
 			}
 			set_position(spawn_point,&mut state.move_state,&mut state.body,&mut state.touching,&mut state.run,&mut state.mode_state,mode,&data.models,&data.hitbox_mesh,&data.bvh,&state.style,&state.camera,&state.input_state,state.time);
-			set_velocity(&mut state.body,&state.touching,&data.models,&data.hitbox_mesh,vec3::ZERO);
+			set_velocity(&mut state.body,&state.touching,&data.models,&data.hitbox_mesh,vec3::zero());
 			state.set_move_state(data,MoveState::Air);
 			b_refresh_walk_target=false;
 		}
@@ -1917,7 +2008,7 @@ mod test{
 	use strafesnet_common::integer::{vec3::{self,int as int3},mat3};
 	use super::*;
 	fn test_collision_axis_aligned(relative_body:Body,expected_collision_time:Option<Time>){
-		let h0=HitboxMesh::new(PhysicsMesh::unit_cube(),integer::Planar64Affine3::new(mat3::from_diagonal(int3(5,1,5)>>1),vec3::ZERO));
+		let h0=HitboxMesh::new(PhysicsMesh::unit_cube(),integer::Planar64Affine3::new(mat3::from_diagonal(int3(5,1,5)>>1),vec3::zero()));
 		let h1=StyleModifiers::roblox_bhop().calculate_mesh();
 		let hitbox_mesh=h1.transformed_mesh();
 		let platform_mesh=h0.transformed_mesh();
@@ -1933,7 +2024,7 @@ mod test{
 					int3(0,1,0)>>1,
 					int3(-1,0,5)>>1,
 				]),
-				vec3::ZERO
+				vec3::zero()
 			),
 		);
 		let h1=StyleModifiers::roblox_bhop().calculate_mesh();
@@ -1952,7 +2043,7 @@ mod test{
 		test_collision(Body::new(
 			int3(0,5,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -1961,7 +2052,7 @@ mod test{
 		test_collision(Body::new(
 			int3(0,5,0),
 			int3(0,-1,0)+(vec3::X>>32),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -1970,7 +2061,7 @@ mod test{
 		test_collision(Body::new(
 			int3(3,5,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -1979,7 +2070,7 @@ mod test{
 		test_collision(Body::new(
 			int3(0,5,3),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -1988,7 +2079,7 @@ mod test{
 		test_collision(Body::new(
 			int3(-3,5,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -1997,7 +2088,7 @@ mod test{
 		test_collision(Body::new(
 			int3(0,5,-3),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -2114,7 +2205,7 @@ mod test{
 		test_collision(Body::new(
 			int3(0,5,0),
 			int3(1,-64,2)>>6,// /64
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)));
 	}
@@ -2130,7 +2221,7 @@ mod test{
 	#[test]
 	fn already_inside_hit_nothing(){
 		test_collision(Body::new(
-			vec3::ZERO,
+			vec3::zero(),
 			int3(1,0,0),
 			int3(0,1,0),
 			Time::ZERO
@@ -2142,7 +2233,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(0,10,-7)>>1)+vec3::raw_xyz(0,0,1),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)))
 	}
@@ -2151,7 +2242,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(7,10,0)>>1)+vec3::raw_xyz(-1,0,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)))
 	}
@@ -2160,7 +2251,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(0,10,7)>>1)+vec3::raw_xyz(0,0,-1),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)))
 	}
@@ -2169,7 +2260,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(-7,10,0)>>1)+vec3::raw_xyz(1,0,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),Some(Time::from_secs(2)))
 	}
@@ -2179,7 +2270,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			int3(0,10,-7)>>1,
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2188,7 +2279,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			int3(7,10,0)>>1,
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2197,7 +2288,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			int3(0,10,7)>>1,
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2206,7 +2297,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			int3(-7,10,0)>>1,
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2216,7 +2307,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(0,10,-7)>>1)-vec3::raw_xyz(0,0,1),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2225,7 +2316,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(7,10,0)>>1)-vec3::raw_xyz(-1,0,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2234,7 +2325,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(0,10,7)>>1)-vec3::raw_xyz(0,0,-1),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}
@@ -2243,7 +2334,7 @@ mod test{
 		test_collision_axis_aligned(Body::new(
 			(int3(-7,10,0)>>1)-vec3::raw_xyz(1,0,0),
 			int3(0,-1,0),
-			vec3::ZERO,
+			vec3::zero(),
 			Time::ZERO
 		),None)
 	}

engine/physics/src/push_solve.rs

@@ -39,20 +39,18 @@ impl Contact{
 
 //note that this is horrible with fixed point arithmetic
 fn solve1(c0:&Contact)->Option<Ratio<Vector3<Fixed<3,96>>,Fixed<2,64>>>{
-	const EPSILON:Fixed<2,64>=Fixed::from_bits(Fixed::<2,64>::ONE.to_bits().shr(10));
 	let det=c0.normal.dot(c0.velocity);
-	if det.abs()<EPSILON{
+	if det.abs()==Fixed::ZERO{
 		return None;
 	}
 	let d0=c0.normal.dot(c0.position);
 	Some(c0.normal*d0/det)
 }
 fn solve2(c0:&Contact,c1:&Contact)->Option<Ratio<Vector3<Fixed<5,160>>,Fixed<4,128>>>{
-	const EPSILON:Fixed<4,128>=Fixed::from_bits(Fixed::<4,128>::ONE.to_bits().shr(10));
 	let u0_u1=c0.velocity.cross(c1.velocity);
 	let n0_n1=c0.normal.cross(c1.normal);
 	let det=u0_u1.dot(n0_n1);
-	if det.abs()<EPSILON{
+	if det.abs()==Fixed::ZERO{
 		return None;
 	}
 	let d0=c0.normal.dot(c0.position);
@@ -60,10 +58,9 @@ fn solve2(c0:&Contact,c1:&Contact)->Option<Ratio<Vector3<Fixed<5,160>>,Fixed<4,1
 	Some((c1.normal.cross(u0_u1)*d0+u0_u1.cross(c0.normal)*d1)/det)
 }
 fn solve3(c0:&Contact,c1:&Contact,c2:&Contact)->Option<Ratio<Vector3<Fixed<4,128>>,Fixed<3,96>>>{
-	const EPSILON:Fixed<3,96>=Fixed::from_bits(Fixed::<3,96>::ONE.to_bits().shr(10));
 	let n0_n1=c0.normal.cross(c1.normal);
 	let det=c2.normal.dot(n0_n1);
-	if det.abs()<EPSILON{
+	if det.abs()==Fixed::ZERO{
 		return None;
 	}
 	let d0=c0.normal.dot(c0.position);
@@ -149,7 +146,7 @@ fn is_space_enclosed_4(
 }
 
 const fn get_push_ray_0(point:Planar64Vec3)->Ray{
-	Ray{origin:point,direction:vec3::ZERO}
+	Ray{origin:point,direction:vec3::zero()}
 }
 fn get_push_ray_1(point:Planar64Vec3,c0:&Contact)->Option<Ray>{
 	//wrap for speed
@@ -321,13 +318,13 @@ mod tests{
 	fn test_push_solve(){
 		let contacts=vec![
 			Contact{
-				position:vec3::ZERO,
+				position:vec3::zero(),
 				velocity:vec3::Y,
 				normal:vec3::Y,
 			}
 		];
 		assert_eq!(
-			vec3::ZERO,
+			vec3::zero(),
 			push_solve(&contacts,vec3::NEG_Y)
 		);
 	}

engine/session/src/session.rs

@@ -2,6 +2,7 @@ use std::collections::HashMap;
 
 use strafesnet_common::gameplay_modes::{ModeId,StageId};
 use strafesnet_common::instruction::{InstructionConsumer,InstructionEmitter,InstructionFeedback,TimedInstruction};
+use strafesnet_common::model::ModelId;
 // session represents the non-hardware state of the client.
 // Ideally it is a deterministic state which is atomically updated by instructions, same as the simulation state.
 use strafesnet_common::physics::{
@@ -61,6 +62,7 @@ pub struct FrameState{
 	pub body:physics::Body,
 	pub camera:physics::PhysicsCamera,
 	pub time:PhysicsTime,
+	pub debug_model:Option<ModelId>,
 }
 
 pub struct Simulation{
@@ -77,11 +79,12 @@ impl Simulation{
 			physics,
 		}
 	}
-	pub fn get_frame_state(&self,time:SessionTime)->FrameState{
+	pub fn get_frame_state(&self,time:SessionTime,debug_model:Option<ModelId>)->FrameState{
 		FrameState{
 			body:self.physics.camera_body(),
 			camera:self.physics.camera(),
 			time:self.timer.time(time),
+			debug_model,
 		}
 	}
 }
@@ -161,6 +164,7 @@ pub struct Session{
 	recording:Recording,
 	//players:HashMap<PlayerId,Simulation>,
 	replays:HashMap<BotId,Replay>,
+	last_ray_hit:Option<ModelId>,
 }
 impl Session{
 	pub fn new(
@@ -177,6 +181,7 @@ impl Session{
 			view_state:ViewState::Play,
 			recording:Default::default(),
 			replays:HashMap::new(),
+			last_ray_hit:None,
 		}
 	}
 	fn clear_recording(&mut self){
@@ -188,12 +193,25 @@ impl Session{
 	}
 	pub fn get_frame_state(&self,time:SessionTime)->Option<FrameState>{
 		match &self.view_state{
-			ViewState::Play=>Some(self.simulation.get_frame_state(time)),
+			ViewState::Play=>Some(self.simulation.get_frame_state(time,self.last_ray_hit)),
 			ViewState::Replay(bot_id)=>self.replays.get(bot_id).map(|replay|
-				replay.simulation.get_frame_state(time)
+				replay.simulation.get_frame_state(time,None)
 			),
 		}
 	}
+	pub fn debug_raycast_print_model_id_if_changed(&mut self,time:SessionTime){
+		if let Some(frame_state)=self.get_frame_state(time){
+			let ray=strafesnet_common::ray::Ray{
+				origin:frame_state.body.extrapolated_position(self.simulation.timer.time(time)),
+				direction:-frame_state.camera.rotation().z_axis,
+			};
+			let model_id=self.geometry_shared.trace_ray(ray);
+			if model_id!=self.last_ray_hit{
+				println!("hit={model_id:?}");
+				self.last_ray_hit=model_id;
+			}
+		}
+	}
 	pub fn user_settings(&self)->&UserSettings{
 		&self.user_settings
 	}

integration-testing/src/test_scenes.rs

@@ -77,7 +77,7 @@ fn simultaneous_collision(){
 		Time::ZERO,
 	);
 	let mut physics=PhysicsState::new_with_body(body);
-	physics.style_mut().gravity=vec3::ZERO;
+	physics.style_mut().gravity=vec3::zero();
 	let mut phys_iter=PhysicsContext::iter_internal(&mut physics,&physics_data,Time::from_secs(2))
 		.filter(|ins|!matches!(ins.instruction,InternalInstruction::StrafeTick));
 	// the order that they hit does matter, but we aren't currently worrying about that.
@@ -101,7 +101,7 @@ fn bug_3(){
 		Time::ZERO,
 	);
 	let mut physics=PhysicsState::new_with_body(body);
-	physics.style_mut().gravity=vec3::ZERO;
+	physics.style_mut().gravity=vec3::zero();
 	let mut phys_iter=PhysicsContext::iter_internal(&mut physics,&physics_data,Time::from_secs(3))
 		.filter(|ins|!matches!(ins.instruction,InternalInstruction::StrafeTick));
 	// touch side of part at 0,0,0

lib/bsp_loader/src/brush.rs

@@ -210,7 +210,7 @@ pub fn faces_to_mesh(faces:Vec<Vec<integer::Planar64Vec3>>)->model::Mesh{
 	let color=mb.acquire_color_id(glam::Vec4::ONE);
 	let tex=mb.acquire_tex_id(glam::Vec2::ZERO);
 	// normals are ignored by physics
-	let normal=mb.acquire_normal_id(integer::vec3::ZERO);
+	let normal=mb.acquire_normal_id(integer::vec3::zero());
 
 	let polygon_list=faces.into_iter().map(|face|{
 		face.into_iter().map(|pos|{

lib/bsp_loader/src/bsp.rs

@@ -105,7 +105,7 @@ pub fn convert<'a>(
 					water:Some(attr::IntersectingWater{
 						viscosity:integer::Planar64::ONE,
 						density:integer::Planar64::ONE,
-						velocity:integer::vec3::ZERO,
+						velocity:integer::vec3::zero(),
 					}),
 				},
 				general:attr::GeneralAttributes::default(),
@@ -295,7 +295,7 @@ pub fn convert<'a>(
 					attributes,
 					transform:integer::Planar64Affine3::new(
 						integer::mat3::identity(),
-						integer::vec3::ZERO,
+						integer::vec3::zero(),
 					),
 					color:glam::Vec4::ONE,
 				});

lib/common/src/gameplay_style.rs

@@ -319,7 +319,7 @@ impl WalkSettings{
 		self.accelerate.accel.min((-gravity.y*friction).clamp_1())
 	}
 	pub fn get_walk_target_velocity(&self,control_dir:Planar64Vec3,normal:Planar64Vec3)->Planar64Vec3{
-		if control_dir==crate::integer::vec3::ZERO{
+		if control_dir==crate::integer::vec3::zero(){
 			return control_dir;
 		}
 		let nn=normal.length_squared();
@@ -329,13 +329,13 @@ impl WalkSettings{
 		let dd=d*d;
 		if dd<nnmm{
 			let cr=normal.cross(control_dir);
-			if cr==crate::integer::vec3::ZERO_2{
+			if cr==crate::integer::vec3::zero(){
-				crate::integer::vec3::ZERO
+				crate::integer::vec3::zero()
 			}else{
 				(cr.cross(normal)*self.accelerate.topspeed/((nn*(nnmm-dd)).sqrt())).divide().clamp_1()
 			}
 		}else{
-			crate::integer::vec3::ZERO
+			crate::integer::vec3::zero()
 		}
 	}
 	pub fn is_slope_walkable(&self,normal:Planar64Vec3,up:Planar64Vec3)->bool{
@@ -360,7 +360,7 @@ impl LadderSettings{
 		self.accelerate.accel
 	}
 	pub fn get_ladder_target_velocity(&self,mut control_dir:Planar64Vec3,normal:Planar64Vec3)->Planar64Vec3{
-		if control_dir==crate::integer::vec3::ZERO{
+		if control_dir==crate::integer::vec3::zero(){
 			return control_dir;
 		}
 		let nn=normal.length_squared();
@@ -382,13 +382,13 @@ impl LadderSettings{
 		//- fix the underlying issue
 		if dd<nnmm{
 			let cr=normal.cross(control_dir);
-			if cr==crate::integer::vec3::ZERO_2{
+			if cr==crate::integer::vec3::zero(){
-				crate::integer::vec3::ZERO
+				crate::integer::vec3::zero()
 			}else{
 				(cr.cross(normal)*self.accelerate.topspeed/((nn*(nnmm-dd)).sqrt())).divide().clamp_1()
 			}
 		}else{
-			crate::integer::vec3::ZERO
+			crate::integer::vec3::zero()
 		}
 	}
 }

lib/common/src/integer.rs

@@ -561,12 +561,6 @@ pub mod vec3{
 	pub use linear_ops::types::Vector3;
 	pub const MIN:Planar64Vec3=Planar64Vec3::new([Planar64::MIN;3]);
 	pub const MAX:Planar64Vec3=Planar64Vec3::new([Planar64::MAX;3]);
-	pub const ZERO:Planar64Vec3=Planar64Vec3::new([Planar64::ZERO;3]);
-	pub const ZERO_2:Vector3<Fixed::<2,64>>=Vector3::new([Fixed::<2,64>::ZERO;3]);
-	pub const ZERO_3:Vector3<Fixed::<3,96>>=Vector3::new([Fixed::<3,96>::ZERO;3]);
-	pub const ZERO_4:Vector3<Fixed::<4,128>>=Vector3::new([Fixed::<4,128>::ZERO;3]);
-	pub const ZERO_5:Vector3<Fixed::<5,160>>=Vector3::new([Fixed::<5,160>::ZERO;3]);
-	pub const ZERO_6:Vector3<Fixed::<6,192>>=Vector3::new([Fixed::<6,192>::ZERO;3]);
 	pub const X:Planar64Vec3=Planar64Vec3::new([Planar64::ONE,Planar64::ZERO,Planar64::ZERO]);
 	pub const Y:Planar64Vec3=Planar64Vec3::new([Planar64::ZERO,Planar64::ONE,Planar64::ZERO]);
 	pub const Z:Planar64Vec3=Planar64Vec3::new([Planar64::ZERO,Planar64::ZERO,Planar64::ONE]);
@@ -575,6 +569,10 @@ pub mod vec3{
 	pub const NEG_Y:Planar64Vec3=Planar64Vec3::new([Planar64::ZERO,Planar64::NEG_ONE,Planar64::ZERO]);
 	pub const NEG_Z:Planar64Vec3=Planar64Vec3::new([Planar64::ZERO,Planar64::ZERO,Planar64::NEG_ONE]);
 	pub const NEG_ONE:Planar64Vec3=Planar64Vec3::new([Planar64::NEG_ONE,Planar64::NEG_ONE,Planar64::NEG_ONE]);
+	// TODO: use #![feature(generic_const_items)] when stabilized https://github.com/rust-lang/rust/issues/113521
+	pub const fn zero<const N:usize,const F:usize>()->Vector3<Fixed<N,F>>{
+		Vector3::new([Fixed::ZERO;3])
+	}
 	#[inline]
 	pub const fn int(x:i32,y:i32,z:i32)->Planar64Vec3{
 		Planar64Vec3::new([Planar64::raw((x as i64)<<32),Planar64::raw((y as i64)<<32),Planar64::raw((z as i64)<<32)])
@@ -663,7 +661,7 @@ pub struct Planar64Affine3{
 	pub translation:Planar64Vec3,
 }
 impl Planar64Affine3{
-	pub const IDENTITY:Self=Self::new(mat3::identity(),vec3::ZERO);
+	pub const IDENTITY:Self=Self::new(mat3::identity(),vec3::zero());
 	#[inline]
 	pub const fn new(matrix3:Planar64Mat3,translation:Planar64Vec3)->Self{
 		Self{matrix3,translation}

lib/fixed_wide/src/fixed.rs

@@ -70,6 +70,34 @@ impl<const N:usize,const F:usize> Fixed<N,F>{
 	pub const fn midpoint(self,other:Self)->Self{
 		Self::from_bits(self.bits.midpoint(other.bits))
 	}
+	#[inline]
+	pub const fn min(self,other:Self)->Self{
+		Self::from_bits(self.bits.min(other.bits))
+	}
+	#[inline]
+	pub const fn max(self,other:Self)->Self{
+		Self::from_bits(self.bits.max(other.bits))
+	}
+	/// return the result of self*sign(other)
+	#[inline]
+	pub const fn mul_sign<const N1:usize,const F1:usize>(self,other:Fixed<N1,F1>)->Self{
+		if other.is_negative(){
+			Self::from_bits(self.bits.neg())
+		}else if other.is_zero(){
+			Fixed::ZERO
+		}else{
+			self
+		}
+	}
+	/// return the result of self/sign(other) (divide by zero does not change the sign)
+	#[inline]
+	pub const fn div_sign<const N1:usize,const F1:usize>(self,other:Fixed<N1,F1>)->Self{
+		if other.is_negative(){
+			Self::from_bits(self.bits.neg())
+		}else{
+			self
+		}
+	}
 }
 impl<const F:usize> Fixed<1,F>{
 	/// My old code called this function everywhere so let's provide it
@@ -101,28 +129,6 @@ impl_from!(
 	i8,i16,i32,i64,i128,isize
 );
 
-impl<const N:usize,const F:usize,T> PartialEq<T> for Fixed<N,F>
-where
-		T:Copy,
-		BInt::<N>:From<T>,
-{
-	#[inline]
-	fn eq(&self,&other:&T)->bool{
-		self.bits.eq(&other.into())
-	}
-}
-
-impl<const N:usize,const F:usize,T> PartialOrd<T> for Fixed<N,F>
-	where
-		T:Copy,
-		BInt::<N>:From<T>,
-{
-	#[inline]
-	fn partial_cmp(&self,&other:&T)->Option<std::cmp::Ordering>{
-		self.bits.partial_cmp(&other.into())
-	}
-}
-
 impl<const N:usize,const F:usize> std::ops::Neg for Fixed<N,F>{
 	type Output=Self;
 	#[inline]
@@ -328,16 +334,6 @@ macro_rules! impl_additive_operator {
 				self.$method(other)
 			}
 		}
-		impl<const N:usize,const F:usize,U> core::ops::$trait<U> for $struct<N,F>
-			where
-				BInt::<N>:From<U>,
-		{
-			type Output = $output;
-			#[inline]
-			fn $method(self, other: U) -> Self::Output {
-				Self::from_bits(self.bits.$method(BInt::<N>::from(other).shl(F as u32)))
-			}
-		}
 	};
 }
 macro_rules! impl_additive_assign_operator {
@@ -348,15 +344,6 @@ macro_rules! impl_additive_assign_operator {
 				self.bits.$method(other.bits);
 			}
 		}
-		impl<const N:usize,const F:usize,U> core::ops::$trait<U> for $struct<N,F>
-		where
-				BInt::<N>:From<U>,
-		{
-			#[inline]
-			fn $method(&mut self, other: U) {
-				self.bits.$method(BInt::<N>::from(other).shl(F as u32));
-			}
-		}
 	};
 }
 
@@ -379,7 +366,7 @@ impl_additive_operator!( Fixed, BitXor, bitxor, Self );
 // non-wide operators.  The result is the same width as the inputs.
 
 // This macro is not used in the default configuration.
-#[allow(unused_macros)]
+#[expect(unused_macros)]
 macro_rules! impl_multiplicative_operator_not_const_generic {
 	( ($struct: ident, $trait: ident, $method: ident, $output: ty ), $width:expr ) => {
 		impl<const F:usize> core::ops::$trait for $struct<$width,F>{
@@ -558,7 +545,7 @@ impl_shift_operator!( Fixed, Shr, shr, Self );
 
 // wide operators.  The result width is the sum of the input widths, i.e. none of the multiplication
 
-#[allow(unused_macros)]
+#[expect(unused_macros)]
 macro_rules! impl_wide_operators{
 	($lhs:expr,$rhs:expr)=>{
 		impl core::ops::Mul<Fixed<$rhs,{$rhs*32}>> for Fixed<$lhs,{$lhs*32}>{

lib/rbx_loader/Cargo.toml

@@ -13,16 +13,16 @@ authors = ["Rhys Lloyd <krakow20@gmail.com>"]
 bytemuck = "1.14.3"
 glam = "0.30.0"
 regex = { version = "1.11.3", default-features = false }
-rbx_binary = { version = "1.0.1-sn5", registry = "strafesnet" }
-rbx_dom_weak =  { version = "3.0.1-sn5", registry = "strafesnet" }
 rbx_mesh = "0.5.0"
-rbx_reflection = "5.0.0"
-rbx_reflection_database = "1.0.0"
-rbx_xml = { version = "1.0.1-sn5", registry = "strafesnet" }
 rbxassetid = { version = "0.1.0", path = "../rbxassetid", registry = "strafesnet" }
 roblox_emulator = { version = "0.5.1", path = "../roblox_emulator", default-features = false, registry = "strafesnet" }
 strafesnet_common = { version = "0.7.0", path = "../common", registry = "strafesnet" }
 strafesnet_deferred_loader = { version = "0.5.1", path = "../deferred_loader", registry = "strafesnet" }
+rbx_binary = "2.0.1"
+rbx_dom_weak = "4.1.0"
+rbx_reflection = "6.1.0"
+rbx_reflection_database = "2.0.2"
+rbx_xml = "2.0.1"
 
 [lints]
 workspace = true

lib/rbx_loader/src/rbx.rs

@@ -251,7 +251,7 @@ fn get_attributes(name:&str,can_collide:bool,velocity:Planar64Vec3,model_id:mode
 		}
 	}
 	//need some way to skip this
-	if allow_booster&&velocity!=vec3::ZERO{
+	if allow_booster&&velocity!=vec3::zero(){
 		general.booster=Some(attr::Booster::Velocity(velocity));
 	}
 	Ok(match force_can_collide{
@@ -559,7 +559,7 @@ pub fn convert<'a>(
 	//just going to leave it like this for now instead of reworking the data structures for this whole thing
 	let textureless_render_group=render_config_deferred_loader.acquire_render_config_id(None);
 
-	let db=rbx_reflection_database::get();
+	let db=rbx_reflection_database::get().unwrap();
 	let basepart=&db.classes["BasePart"];
 	let baseparts=dom.descendants().filter(|&instance|
 		db.classes.get(instance.class.as_str()).is_some_and(|class|

lib/rbx_loader/src/union.rs

@@ -250,7 +250,7 @@ pub fn convert(
 		// generate a unit cube as default physics
 		let pos_list=CUBE_DEFAULT_VERTICES.map(|pos|mb.acquire_pos_id(pos>>1));
 		let tex=mb.acquire_tex_id(glam::Vec2::ZERO);
-		let normal=mb.acquire_normal_id(vec3::ZERO);
+		let normal=mb.acquire_normal_id(vec3::zero());
 		let color=mb.acquire_color_id(glam::Vec4::ONE);
 		let polygon_group=PolygonGroup::PolygonList(PolygonList::new(CUBE_DEFAULT_POLYS.map(|poly|poly.map(|[pos_id,_]|
 			mb.acquire_vertex_id(IndexedVertex{pos:pos_list[pos_id as usize],tex,normal,color})

lib/roblox_emulator/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "roblox_emulator"
-version = "0.5.1"
+version = "0.5.2"
 edition = "2024"
 repository = "https://git.itzana.me/StrafesNET/strafe-project"
 license = "MIT OR Apache-2.0"
@@ -15,10 +15,10 @@ run-service=[]
 glam = "0.30.0"
 mlua = { version = "0.11.3", features = ["luau"] }
 phf = { version = "0.13.1", features = ["macros"] }
-rbx_dom_weak = { version = "3.0.1-sn5", registry = "strafesnet" }
+rbx_dom_weak = "4.1.0"
-rbx_reflection = "5.0.0"
+rbx_reflection = "6.1.0"
-rbx_reflection_database = "1.0.0"
+rbx_reflection_database = "2.0.2"
-rbx_types = "2.0.0"
+rbx_types = "3.1.0"
 
 [lints]
 workspace = true

lib/roblox_emulator/src/context.rs

@@ -52,7 +52,7 @@ impl Context{
 	}
 	/// Creates an iterator over all items of a particular class.
 	pub fn superclass_iter<'a>(&'a self,superclass:&'a str)->impl Iterator<Item=Ref>+'a{
-		let db=rbx_reflection_database::get();
+		let db=rbx_reflection_database::get().unwrap();
 		let Some(superclass)=db.classes.get(superclass)else{
 			panic!("Invalid class");
 		};

lib/roblox_emulator/src/runner/enum.rs

@@ -37,7 +37,7 @@ impl PartialEq for EnumItem<'_>{
 pub struct Enums;
 impl Enums{
 	pub fn get(&self,index:&str)->Option<EnumItems<'static>>{
-		let db=rbx_reflection_database::get();
+		let db=rbx_reflection_database::get().unwrap();
 		db.enums.get(index).map(|ed|EnumItems{ed})
 	}
 }

lib/roblox_emulator/src/runner/instance/instance.rs

@@ -37,7 +37,7 @@ pub fn dom_mut<T>(lua:&mlua::Lua,mut f:impl FnMut(&mut WeakDom)->mlua::Result<T>
 }
 
 pub fn class_is_a(class:&str,superclass:&str)->bool{
-	let db=rbx_reflection_database::get();
+	let db=rbx_reflection_database::get().unwrap();
 	let (Some(class),Some(superclass))=(db.classes.get(class),db.classes.get(superclass))else{
 		return false;
 	};
@@ -80,14 +80,14 @@ pub fn find_first_descendant_of_class<'a>(dom:&'a WeakDom,instance:&rbx_dom_weak
 }
 
 pub fn find_first_child_which_is_a<'a>(dom:&'a WeakDom,instance:&rbx_dom_weak::Instance,superclass:&str)->Option<&'a rbx_dom_weak::Instance>{
-	let db=rbx_reflection_database::get();
+	let db=rbx_reflection_database::get().unwrap();
 	let superclass_descriptor=db.classes.get(superclass)?;
 	instance.children().iter().filter_map(|&r|dom.get_by_ref(r)).find(|inst|{
 		db.classes.get(inst.class.as_str()).is_some_and(|descriptor|db.has_superclass(descriptor,superclass_descriptor))
 	})
 }
 pub fn find_first_descendant_which_is_a<'a>(dom:&'a WeakDom,instance:&rbx_dom_weak::Instance,superclass:&str)->Option<&'a rbx_dom_weak::Instance>{
-	let db=rbx_reflection_database::get();
+	let db=rbx_reflection_database::get().unwrap();
 	let superclass_descriptor=db.classes.get(superclass)?;
 	dom.descendants_of(instance.referent()).find(|inst|{
 		db.classes.get(inst.class.as_str()).is_some_and(|descriptor|db.has_superclass(descriptor,superclass_descriptor))
@@ -282,7 +282,7 @@ impl mlua::UserData for Instance{
 			dom_mut(lua,|dom|{
 				let instance=this.get(dom)?;
 				//println!("__index t={} i={index:?}",instance.name);
-				let db=rbx_reflection_database::get();
+				let db=rbx_reflection_database::get().unwrap();
 				let class=db.classes.get(instance.class.as_str()).ok_or_else(||mlua::Error::runtime("Class missing"))?;
 				// Find existing property
 				// Interestingly, ustr can know ahead of time if
@@ -344,7 +344,7 @@ impl mlua::UserData for Instance{
 			let index_str=&*index.to_str()?;
 			dom_mut(lua,|dom|{
 				let instance=this.get_mut(dom)?;
-				let db=rbx_reflection_database::get();
+				let db=rbx_reflection_database::get().unwrap();
 				let class=db.classes.get(instance.class.as_str()).ok_or_else(||mlua::Error::runtime("Class missing"))?;
 				let property=db.superclasses_iter(class).find_map(|cls|
 					cls.properties.get(index_str)

map-tool/Cargo.toml

@@ -13,10 +13,10 @@ futures = "0.3.31"
 image = "0.25.2"
 image_dds = "0.7.1"
 rbx_asset = { version = "0.5.0", registry = "strafesnet" }
-rbx_binary  = { version = "1.0.1-sn5", registry = "strafesnet" }
+rbx_binary = "2.0.1"
-rbx_dom_weak =  { version = "3.0.1-sn5", registry = "strafesnet" }
+rbx_dom_weak = "4.1.0"
-rbx_reflection_database = "1.0.0"
+rbx_reflection_database = "2.0.2"
-rbx_xml = { version = "1.0.1-sn5", registry = "strafesnet" }
+rbx_xml = "2.0.1"
 rbxassetid = { version = "0.1.0", registry = "strafesnet" }
 strafesnet_bsp_loader = { version = "0.3.1", path = "../lib/bsp_loader", registry = "strafesnet" }
 strafesnet_deferred_loader = { version = "0.5.1", path = "../lib/deferred_loader", registry = "strafesnet" }

strafe-client/Cargo.toml

@@ -28,7 +28,7 @@ strafesnet_rbx_loader = { path = "../lib/rbx_loader", registry = "strafesnet", o
 strafesnet_session = { path = "../engine/session", registry = "strafesnet" }
 strafesnet_settings = { path = "../engine/settings", registry = "strafesnet" }
 strafesnet_snf = { path = "../lib/snf", registry = "strafesnet", optional = true }
-wgpu = "27.0.0"
+wgpu = "28.0.0"
 winit = "0.30.7"
 
 [profile.dev]

strafe-client/src/physics_worker.rs

@@ -77,5 +77,8 @@ pub fn new<'a>(
 				run_session_instruction!(ins.time,SessionInstruction::LoadReplay(bot));
 			}
 		}
+
+		//whatever just do it
+		session.debug_raycast_print_model_id_if_changed(ins.time);
 	})
 }

strafe-client/src/setup.rs

@@ -52,7 +52,7 @@ impl<'a> SetupContextPartial2<'a>{
 		let required_features=required_features();
 
 		//no helper function smh gotta write it myself
-		let adapters=self.instance.enumerate_adapters(self.backends);
+		let adapters=pollster::block_on(self.instance.enumerate_adapters(self.backends));
 
 		let mut chosen_adapter=None;
 		let mut chosen_adapter_score=0;

strafe-client/src/shader.wgsl

@@ -86,6 +86,29 @@ fn vs_entity_texture(
 	return result;
 }
 
+@group(1)
+@binding(0)
+var<uniform> model_instance: ModelInstance;
+
+struct DebugEntityOutput {
+	@builtin(position) position: vec4<f32>,
+	@location(1) normal: vec3<f32>,
+	@location(2) view: vec3<f32>,
+};
+
+@vertex
+fn vs_debug(
+	@location(0) pos: vec3<f32>,
+	@location(1) normal: vec3<f32>,
+) -> DebugEntityOutput {
+	var position: vec4<f32> = model_instance.transform * vec4<f32>(pos, 1.0);
+	var result: DebugEntityOutput;
+	result.normal = model_instance.normal_transform * normal;
+	result.view = position.xyz - camera.view_inv[3].xyz;//col(3)
+	result.position = camera.proj * camera.view * position;
+	return result;
+}
+
 //group 2 is the skybox texture
 @group(1)
 @binding(0)
@@ -110,3 +133,8 @@ fn fs_entity_texture(vertex: EntityOutputTexture) -> @location(0) vec4<f32> {
 	let reflected_color = textureSample(cube_texture, cube_sampler, reflected).rgb;
 	return mix(vec4<f32>(vec3<f32>(0.05) + 0.2 * reflected_color,1.0),mix(vertex.model_color,vec4<f32>(fragment_color.rgb,1.0),fragment_color.a),0.5+0.5*abs(d));
 }
+
+@fragment
+fn fs_debug(vertex: DebugEntityOutput) -> @location(0) vec4<f32> {
+	return model_instance.color;
+}