give the checkerboard "reflections"

take advantage of the empty depth buffer, render the true depth afterwards to embed the teapot wall into the scene

src/body.rs

@@ -1,120 +0,0 @@
-pub struct Body {
-	pub position: glam::Vec3,//I64 where 2^32 = 1 u
-	pub velocity: glam::Vec3,//I64 where 2^32 = 1 u/s
-	pub time: TIME,//nanoseconds x xxxxD!
-}
-
-pub struct PhysicsState {
-	pub body: Body,
-	//pub contacts: Vec<RelativeCollision>,
-	pub time: TIME,
-	pub strafe_tick_rate: TIME,
-	pub tick: u32,
-	pub mv: f32,
-	pub walkspeed: f32,
-	pub friction: f32,
-	pub gravity: glam::Vec3,
-	pub grounded: bool,
-	pub jump_trying: bool,
-}
-
-pub type TIME = i64;
-
-const CONTROL_JUMP:u32 = 0b01000000;//temp
-impl PhysicsState {
-	//delete this, we are tickless gamers
-	pub fn run(&mut self, time: TIME, control_dir: glam::Vec3, controls: u32){
-		let target_tick = (time/10_000_000) as u32;//100t
-		//the game code can run for 1 month before running out of ticks
-		while self.tick<target_tick {
-			self.tick += 1;
-			let dt=0.01;
-			let d=self.body.velocity.dot(control_dir);
-			if d<self.mv {
-				self.body.velocity+=(self.mv-d)*control_dir;
-			}
-			self.body.velocity+=self.gravity*dt;
-			self.body.position+=self.body.velocity*dt;
-			if self.body.position.y<0.0{
-				self.body.position.y=0.0;
-				self.body.velocity.y=0.0;
-				self.grounded=true;
-			}
-			if self.grounded&&(controls&CONTROL_JUMP)!=0 {
-				self.grounded=false;
-				self.body.velocity+=glam::Vec3::new(0.0,0.715588/2.0*100.0,0.0);
-			}
-			if self.grounded {
-				let applied_friction=self.friction*dt;
-				let targetv=control_dir*self.walkspeed;
-				let diffv=targetv-self.body.velocity;
-				if applied_friction*applied_friction<diffv.length_squared() {
-					self.body.velocity+=applied_friction*diffv.normalize();
-				} else {
-					self.body.velocity=targetv;
-				}
-			}
-		}
-
-		self.body.time=target_tick as TIME*10_000_000;
-	}
-
-	//delete this
-	pub fn extrapolate_position(&self, time: TIME) -> glam::Vec3 {
-		let dt=(time-self.body.time) as f64/1_000_000_000f64;
-		self.body.position+self.body.velocity*(dt as f32)+self.gravity*((0.5*dt*dt) as f32)
-	}
-
-	fn next_strafe_event(&self) -> Option<crate::event::EventStruct> {
-		return Some(crate::event::EventStruct{
-			time:self.time/self.strafe_tick_rate*self.strafe_tick_rate,//this is floor(n) I need ceil(n)+1
-			event:crate::event::EventEnum::StrafeTick
-		});
-	}
-}
-
-impl crate::event::EventTrait for PhysicsState {
-	//this little next event function can cache its return value and invalidate the cached value by watching the State.
-	fn next_event(&self) -> Option<crate::event::EventStruct> {
-		//JUST POLLING!!! NO MUTATION
-		let mut best_event: Option<crate::event::EventStruct> = None;
-		let collect_event = |test_event:Option<crate::event::EventStruct>|{
-			match test_event {
-				Some(unwrap_test_event) => match best_event {
-					Some(unwrap_best_event) => if unwrap_test_event.time<unwrap_best_event.time {
-						best_event=test_event;
-					},
-					None => best_event=test_event,
-				},
-				None => (),
-			}
-		};
-		//check to see if yee need to jump (this is not the way lol)
-		if self.grounded&&self.jump_trying {
-			//scroll will be implemented with InputEvent::InstantJump rather than InputEvent::Jump(true)
-			collect_event(Some(crate::event::EventStruct{
-				time:self.time,
-				event:crate::event::EventEnum::Jump
-			}));
-		}
-		//check for collision stop events with curent contacts
-		for collision_data in self.contacts.iter() {
-			collect_event(self.model.predict_collision(collision_data.model));
-		}
-		//check for collision start events (against every part in the game with no optimization!!)
-		for &model in self.world.models {
-			collect_event(self.model.predict_collision(&model));
-		}
-		//check to see when the next strafe tick is
-		collect_event(self.next_strafe_event());
-		best_event
-	}
-}
-
-//something that implements body + hitbox can predict collision
-impl crate::sweep::PredictCollision for Model {
-	fn predict_collision(&self,other:&Model) -> Option<crate::event::EventStruct> {
-		//math!
-		None
-	}
-}

src/event.rs

@@ -1,15 +0,0 @@
-pub struct EventStruct {
-	pub time: crate::body::TIME,
-	pub event: EventEnum,
-}
-
-pub enum EventEnum {
-	CollisionStart,//(Collideable),//Body::CollisionStart
-	CollisionEnd,//(Collideable),//Body::CollisionEnd
-	StrafeTick,
-	Jump,
-}
-
-pub trait EventTrait {
-	fn next_event(&self) -> Option<EventStruct>;
-}

src/lib.rs

@@ -1,3 +1 @@
 pub mod framework;
-pub mod body;
-pub mod event;

src/main.rs

@@ -20,12 +20,16 @@ struct Entity {
 //temp?
 struct ModelData {
 	transform: glam::Mat4,
+	transform_depth: glam::Mat4,
+	use_depth: glam::Vec4,
 	vertex_buf: wgpu::Buffer,
 	entities: Vec<Entity>,
 }
 
 struct Model {
 	transform: glam::Mat4,
+	transform_depth: glam::Mat4,
+	use_depth: glam::Vec4,
 	vertex_buf: wgpu::Buffer,
 	entities: Vec<Entity>,
 	bind_group: wgpu::BindGroup,
@@ -34,12 +38,20 @@ struct Model {
 
 // Note: we use the Y=up coordinate space in this example.
 struct Camera {
+	time: Instant,
+	pos: glam::Vec3,
+	vel: glam::Vec3,
+	gravity: glam::Vec3,
+	friction: f32,
 	screen_size: (u32, u32),
 	offset: glam::Vec3,
 	fov: f32,
 	yaw: f32,
 	pitch: f32,
 	controls: u32,
+	mv: f32,
+	grounded: bool,
+	walkspeed: f32,
 }
 
 const CONTROL_MOVEFORWARD:u32 = 0b00000001;
@@ -92,7 +104,7 @@ fn get_control_dir(controls: u32) -> glam::Vec3{
 	}
 
 impl Camera {
-	fn to_uniform_data(&self, pos: glam::Vec3) -> [f32; 16 * 3 + 4] {
+	fn to_uniform_data(&self) -> [f32; 16 * 3 + 4] {
 		let aspect = self.screen_size.0 as f32 / self.screen_size.1 as f32;
 		let fov = if self.controls&CONTROL_ZOOM==0 {
 			self.fov
@@ -101,7 +113,7 @@ impl Camera {
 		};
 		let proj = perspective_rh(fov, aspect, 0.5, 1000.0);
 		let proj_inv = proj.inverse();
-		let view = glam::Mat4::from_translation(pos+self.offset) * glam::Mat4::from_euler(glam::EulerRot::YXZ, self.yaw, self.pitch, 0f32);
+		let view = glam::Mat4::from_translation(self.pos+self.offset) * glam::Mat4::from_euler(glam::EulerRot::YXZ, self.yaw, self.pitch, 0f32);
 		let view_inv = view.inverse();
 
 		let mut raw = [0f32; 16 * 3 + 4];
@@ -114,17 +126,19 @@ impl Camera {
 }
 
 pub struct Skybox {
-	start_time: std::time::Instant,
 	camera: Camera,
-	physics: strafe_client::body::PhysicsState,
 	sky_pipeline: wgpu::RenderPipeline,
 	entity_pipeline: wgpu::RenderPipeline,
 	ground_pipeline: wgpu::RenderPipeline,
+	special_teapot: Model,
+	checkered_pipeline: wgpu::RenderPipeline,
+	depth_overwrite_pipeline: wgpu::RenderPipeline,
 	main_bind_group: wgpu::BindGroup,
 	camera_buf: wgpu::Buffer,
 	models: Vec<Model>,
 	depth_view: wgpu::TextureView,
 	staging_belt: wgpu::util::StagingBelt,
+	start_time: Instant,
 }
 
 impl Skybox {
@@ -153,9 +167,18 @@ impl Skybox {
 	}
 }
 
-fn get_transform_uniform_data(transform:&glam::Mat4) -> [f32; 4*4] {
-	let mut raw = [0f32; 4*4];
-	raw[0..16].copy_from_slice(&AsRef::<[f32; 4*4]>::as_ref(transform)[..]);
+fn get_model_uniform_data(model:&Model) -> [f32; 4*4*2+4] {
+	let mut raw = [0f32; 4*4*2+4];
+	raw[0..16].copy_from_slice(&AsRef::<[f32; 4*4]>::as_ref(&model.transform)[..]);
+	raw[16..32].copy_from_slice(&AsRef::<[f32; 4*4]>::as_ref(&model.transform_depth)[..]);
+	raw[32..36].copy_from_slice(AsRef::<[f32; 4]>::as_ref(&model.use_depth));
+	raw
+}
+fn get_modeldata_uniform_data(model:&ModelData) -> [f32; 4*4*2+4] {
+	let mut raw = [0f32; 4*4*2+4];
+	raw[0..16].copy_from_slice(&AsRef::<[f32; 4*4]>::as_ref(&model.transform)[..]);
+	raw[16..32].copy_from_slice(&AsRef::<[f32; 4*4]>::as_ref(&model.transform_depth)[..]);
+	raw[32..36].copy_from_slice(AsRef::<[f32; 4]>::as_ref(&model.use_depth));
 	raw
 }
 
@@ -203,6 +226,8 @@ fn add_obj(device:&wgpu::Device,modeldatas:& mut Vec<ModelData>,source:&[u8]){
 		});
 		modeldatas.push(ModelData {
 			transform: glam::Mat4::default(),
+			transform_depth: glam::Mat4::default(),
+			use_depth: glam::Vec4::ZERO,
 			vertex_buf,
 			entities,
 		})
@@ -228,7 +253,13 @@ impl strafe_client::framework::Example for Skybox {
 		add_obj(device,& mut modeldatas,include_bytes!("../models/teapot.obj"));
 		println!("models.len = {:?}", modeldatas.len());
 		modeldatas[1].transform=glam::Mat4::from_translation(glam::vec3(10.,5.,10.));
-		modeldatas[2].transform=glam::Mat4::from_translation(glam::vec3(-10.,5.,10.));
+
+		let proj1 = glam::Mat4::orthographic_rh(-20.0, 20.0, -20.0, 20.0, -20.0, 20.0);
+		let model0 = glam::Mat4::from_translation(glam::vec3(-10.,5.,10.)) * glam::Mat4::from_scale(glam::vec3(10.0,10.0,10.0));
+
+		modeldatas[2].transform=model0;
+		modeldatas[2].transform_depth=proj1;// * view1_inv
+		modeldatas[2].use_depth=glam::Vec4::Z;
 
 		let main_bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
 			label: None,
@@ -284,30 +315,22 @@ impl strafe_client::framework::Example for Skybox {
 		});
 
 		let camera = Camera {
+			time: Instant::now(),
+			pos: glam::Vec3::new(5.0,0.0,5.0),
+			vel: glam::Vec3::new(0.0,0.0,0.0),
+			gravity: glam::Vec3::new(0.0,-100.0,0.0),
+			friction: 90.0,
 			screen_size: (config.width, config.height),
 			offset: glam::Vec3::new(0.0,4.5,0.0),
 			fov: 1.0, //fov_slope = tan(fov_y/2)
 			pitch: 0.0,
 			yaw: 0.0,
-			controls:0,
-		};
-		let physics = strafe_client::body::PhysicsState {
-			body: strafe_client::body::Body {
-				position: glam::Vec3::new(5.0,0.0,5.0),
-				velocity: glam::Vec3::new(0.0,0.0,0.0),
-				time: 0,
-			},
-			time: 0,
-			tick: 0,
-			tick_rate: 100,
-			gravity: glam::Vec3::new(0.0,-100.0,0.0),
-			friction: 90.0,
 			mv: 2.7,
+			controls:0,
 			grounded: true,
 			walkspeed: 18.0,
 		};
-
-		let camera_uniforms = camera.to_uniform_data(physics.extrapolate_position(0));
+		let camera_uniforms = camera.to_uniform_data();
 		let camera_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
 			label: Some("Camera"),
 			contents: bytemuck::cast_slice(&camera_uniforms),
@@ -406,6 +429,60 @@ impl strafe_client::framework::Example for Skybox {
 			multisample: wgpu::MultisampleState::default(),
 			multiview: None,
 		});
+		let checkered_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+			label: Some("Checkered"),
+			layout: Some(&pipeline_layout),
+			vertex: wgpu::VertexState {
+				module: &shader,
+				entry_point: "vs_square",
+				buffers: &[],
+			},
+			fragment: Some(wgpu::FragmentState {
+				module: &shader,
+				entry_point: "fs_checkered",
+				targets: &[Some(config.view_formats[0].into())],
+			}),
+			primitive: wgpu::PrimitiveState {
+				front_face: wgpu::FrontFace::Cw,
+				..Default::default()
+			},
+			depth_stencil: Some(wgpu::DepthStencilState {
+				format: Self::DEPTH_FORMAT,
+				depth_write_enabled: false,
+				depth_compare: wgpu::CompareFunction::Always,
+				stencil: wgpu::StencilState::default(),
+				bias: wgpu::DepthBiasState::default(),
+			}),
+			multisample: wgpu::MultisampleState::default(),
+			multiview: None,
+		});
+		let depth_overwrite_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+			label: Some("Overwrite"),
+			layout: Some(&pipeline_layout),
+			vertex: wgpu::VertexState {
+				module: &shader,
+				entry_point: "vs_square",
+				buffers: &[],
+			},
+			fragment: Some(wgpu::FragmentState {
+				module: &shader,
+				entry_point: "fs_overwrite",
+				targets: &[Some(config.view_formats[0].into())],
+			}),
+			primitive: wgpu::PrimitiveState {
+				front_face: wgpu::FrontFace::Cw,
+				..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,
+		});
 
 		let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
 			label: None,
@@ -512,7 +589,7 @@ impl strafe_client::framework::Example for Skybox {
 		//drain the modeldata vec so entities can be /moved/ to models.entities
 		let mut models = Vec::<Model>::with_capacity(modeldatas.len());
 		for (i,modeldata) in modeldatas.drain(..).enumerate() {
-			let model_uniforms = get_transform_uniform_data(&modeldata.transform);
+			let model_uniforms = get_modeldata_uniform_data(&modeldata);
 			let model_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
 				label: Some(format!("Model{}",i).as_str()),
 				contents: bytemuck::cast_slice(&model_uniforms),
@@ -531,6 +608,8 @@ impl strafe_client::framework::Example for Skybox {
 			//all of these are being moved here
 			models.push(Model{
 				transform: modeldata.transform,
+				transform_depth: modeldata.transform_depth,
+				use_depth: modeldata.use_depth,
 				vertex_buf:modeldata.vertex_buf,
 				entities: modeldata.entities,
 				bind_group: model_bind_group,
@@ -538,20 +617,24 @@ impl strafe_client::framework::Example for Skybox {
 			})
 		}
 
+		let teapot = models.pop().unwrap();
+
 		let depth_view = Self::create_depth_texture(config, device);
 
 		Skybox {
-			start_time: Instant::now(),
 			camera,
-			physics,
 			sky_pipeline,
 			entity_pipeline,
 			ground_pipeline,
+			special_teapot: teapot,
+			checkered_pipeline,
+			depth_overwrite_pipeline,
 			main_bind_group,
 			camera_buf,
 			models,
 			depth_view,
 			staging_belt: wgpu::util::StagingBelt::new(0x100),
+			start_time: Instant::now(),
 		}
 	}
 
@@ -629,18 +712,49 @@ impl strafe_client::framework::Example for Skybox {
 		queue: &wgpu::Queue,
 		_spawner: &strafe_client::framework::Spawner,
 	) {
+		let time = Instant::now();
+
+		//physique
+		let dt=(time-self.camera.time).as_secs_f32();
+		self.camera.time=time;
 		let camera_mat=glam::Mat3::from_euler(glam::EulerRot::YXZ,self.camera.yaw,0f32,0f32);
 		let control_dir=camera_mat*get_control_dir(self.camera.controls&(CONTROL_MOVELEFT|CONTROL_MOVERIGHT|CONTROL_MOVEFORWARD|CONTROL_MOVEBACK)).normalize_or_zero();
+		let d=self.camera.vel.dot(control_dir);
+		if d<self.camera.mv {
+			self.camera.vel+=(self.camera.mv-d)*control_dir;
+		}
+		self.camera.vel+=self.camera.gravity*dt;
+		self.camera.pos+=self.camera.vel*dt;
+		if self.camera.pos.y<0.0{
+			self.camera.pos.y=0.0;
+			self.camera.vel.y=0.0;
+			self.camera.grounded=true;
+		}
+		if self.camera.grounded&&(self.camera.controls&CONTROL_JUMP)!=0 {
+			self.camera.grounded=false;
+			self.camera.vel+=glam::Vec3::new(0.0,0.715588/2.0*100.0,0.0);
+		}
+		if self.camera.grounded {
+			let applied_friction=self.camera.friction*dt;
+			let targetv=control_dir*self.camera.walkspeed;
+			let diffv=targetv-self.camera.vel;
+			if applied_friction*applied_friction<diffv.length_squared() {
+				self.camera.vel+=applied_friction*diffv.normalize();
+			} else {
+				self.camera.vel=targetv;
+			}
+		}
 
-		let time=self.start_time.elapsed().as_nanos() as i64;
+		let proj1 = glam::Mat4::orthographic_rh(-20.0, 20.0, -20.0, 20.0, -20.0, 20.0);
+		let model1 = glam::Mat4::from_euler(glam::EulerRot::YXZ, self.start_time.elapsed().as_secs_f32(),0f32,0f32);
 
-		self.physics.run(time,control_dir,self.camera.controls);
+		self.special_teapot.transform_depth=proj1 * model1;
 
 		let mut encoder =
 			device.create_command_encoder(&wgpu::CommandEncoderDescriptor { label: None });
 
 		// update rotation
-		let camera_uniforms = self.camera.to_uniform_data(self.physics.extrapolate_position(time));
+		let camera_uniforms = self.camera.to_uniform_data();
 		self.staging_belt
 			.write_buffer(
 				&mut encoder,
@@ -650,9 +764,22 @@ impl strafe_client::framework::Example for Skybox {
 				device,
 			)
 			.copy_from_slice(bytemuck::cast_slice(&camera_uniforms));
+		//special teapot
+		{
+			let model_uniforms = get_model_uniform_data(&self.special_teapot);
+			self.staging_belt
+				.write_buffer(
+					&mut encoder,
+					&self.special_teapot.model_buf,//description of where data will be written when command is executed
+					0,//offset in staging belt?
+					wgpu::BufferSize::new((model_uniforms.len() * 4) as wgpu::BufferAddress).unwrap(),
+					device,
+				)
+				.copy_from_slice(bytemuck::cast_slice(&model_uniforms));
+		}
 		//This code only needs to run when the uniforms change
 		for model in self.models.iter() {
-			let model_uniforms = get_transform_uniform_data(&model.transform);
+			let model_uniforms = get_model_uniform_data(&model);
 			self.staging_belt
 				.write_buffer(
 					&mut encoder,
@@ -693,6 +820,23 @@ impl strafe_client::framework::Example for Skybox {
 
 			rpass.set_bind_group(0, &self.main_bind_group, &[]);
 
+			//draw special teapot
+			rpass.set_bind_group(1, &self.special_teapot.bind_group, &[]);
+			rpass.set_pipeline(&self.checkered_pipeline);
+			rpass.draw(0..6, 0..1);
+
+			rpass.set_pipeline(&self.entity_pipeline);
+			rpass.set_vertex_buffer(0, self.special_teapot.vertex_buf.slice(..));
+
+			for entity in self.special_teapot.entities.iter() {
+				rpass.set_index_buffer(entity.index_buf.slice(..), wgpu::IndexFormat::Uint16);
+				rpass.draw_indexed(0..entity.index_count, 0, 0..1);
+			}
+
+			rpass.set_pipeline(&self.depth_overwrite_pipeline);
+			rpass.draw(0..6, 0..1);
+
+			//draw models
 			rpass.set_pipeline(&self.entity_pipeline);
 			for model in self.models.iter() {
 				rpass.set_bind_group(1, &model.bind_group, &[]);

src/shader.wgsl

@@ -68,9 +68,15 @@ struct EntityOutput {
 	@location(3) view: vec3<f32>,
 };
 
+struct TransformData {
+	transform: mat4x4<f32>,
+	depth: mat4x4<f32>,
+	use_depth: vec4<f32>,
+};
+
 @group(1)
 @binding(0)
-var<uniform> r_EntityTransform: mat4x4<f32>;
+var<uniform> transform: TransformData;
 
 @vertex
 fn vs_entity(
@@ -78,12 +84,42 @@ fn vs_entity(
 	@location(1) texture: vec2<f32>,
 	@location(2) normal: vec3<f32>,
 ) -> EntityOutput {
-	var position: vec4<f32> = r_EntityTransform * vec4<f32>(pos, 1.0);
+	var position_depth: vec4<f32> = transform.depth * vec4<f32>(pos, 1.0);
+	var position_depth_0: vec4<f32> = position_depth;
+	position_depth_0.z=0.0;
+	var position: vec4<f32> = transform.transform * mix(position_depth,position_depth_0,transform.use_depth);
+
 	var result: EntityOutput;
-	result.normal = (r_EntityTransform * vec4<f32>(normal, 0.0)).xyz;
+	result.normal = (transform.transform * mix(vec4<f32>(normal,0.0),vec4<f32>(0.0,0.0,1.0,0.0),transform.use_depth.z)).xyz;
 	result.texture=texture;
 	result.view = position.xyz - r_data.cam_pos.xyz;
-	result.position = r_data.proj * r_data.view * position;
+	var screen_position: vec4<f32> = r_data.proj * r_data.view * position;
+	result.position = mix(screen_position,position_depth,transform.use_depth);
+	return result;
+}
+
+struct SquareOutput {
+	@builtin(position) position: vec4<f32>,
+	@location(2) normal: vec3<f32>,
+	@location(3) view: vec3<f32>,
+	@location(4) pos: vec3<f32>,
+};
+@vertex
+fn vs_square(@builtin(vertex_index) vertex_index: u32) -> SquareOutput {
+	// hacky way to draw two triangles that make a square
+	let tmp1 = i32(vertex_index)/2-i32(vertex_index)/3;
+	let tmp2 = i32(vertex_index)&1;
+	let pos = vec3<f32>(
+		(f32(tmp1) - 0.5)*1.8,
+		f32(tmp2) - 0.5,
+		0.0
+	);
+
+	var result: SquareOutput;
+	result.normal = vec3<f32>(0.0,0.0,1.0);
+	result.pos = (transform.transform * vec4<f32>(pos, 1.0)).xyz;
+	result.view = result.pos - r_data.cam_pos.xyz;
+	result.position = r_data.proj * r_data.view * transform.transform * vec4<f32>(pos, 1.0);
 	return result;
 }
 
@@ -129,3 +165,24 @@ fn fs_ground(vertex: GroundOutput) -> @location(0) vec4<f32> {
 	let dir = vec3<f32>(-1.0)+vec3<f32>(modulo_euclidean(vertex.pos.x/16.,1.0),0.0,modulo_euclidean(vertex.pos.z/16.,1.0))*2.0;
 	return vec4<f32>(textureSample(r_texture, r_sampler, dir).rgb, 1.0);
 }
+
+@fragment
+fn fs_checkered(vertex: SquareOutput) -> @location(0) vec4<f32> {
+	let voxel_parity: f32 = f32(
+		u32(modulo_euclidean(vertex.pos.x,2.0)<1.0)
+		^ u32(modulo_euclidean(vertex.pos.y,2.0)<1.0)
+		//^ u32(modulo_euclidean(vertex.pos.z,2.0)<1.0)
+	);
+
+	let incident = normalize(vertex.view);
+	let normal = normalize(vertex.normal);
+	let d = dot(normal, incident);
+	let reflected = incident - 2.0 * d * normal;
+
+	let texture_color = vec3<f32>(1.0)*voxel_parity;
+	let reflected_color = textureSample(r_texture, r_sampler, reflected).rgb;
+	return vec4<f32>(mix(vec3<f32>(0.1) + 0.5 * reflected_color,texture_color,1.0-pow(1.0-abs(d),2.0)), 1.0);
+}
+
+@fragment
+fn fs_overwrite(vertex: SquareOutput) {}