refactor physics to use shared context for multiple simulations

strafe-client/src/physics.rs

@@ -829,17 +829,7 @@ pub struct PhysicsState{
 	//a start zone.  If you change mode, a new run is created.
 	run:run::Run,
 }
-//random collection of contextual data that doesn't belong in PhysicsState
-pub struct PhysicsData{
-	//permanent map data
-	bvh:bvh::BvhNode<ConvexMeshId>,
-	//transient map/environment data (open world loads/unloads parts of this data)
-	models:PhysicsModels,
-	//semi-transient data
-	modes:gameplay_modes::Modes,
-	//cached calculations
-	hitbox_mesh:HitboxMesh,
-}
+
 impl Default for PhysicsState{
 	fn default()->Self{
  		Self{
@@ -856,19 +846,18 @@ impl Default for PhysicsState{
 		}
 	}
 }
-impl Default for PhysicsData{
-	fn default()->Self{
- 		Self{
-			bvh:bvh::BvhNode::default(),
-			models:Default::default(),
-			modes:Default::default(),
-			hitbox_mesh:StyleModifiers::default().calculate_mesh(),
-		}
-	}
-}
 
 impl PhysicsState{
-	fn clear(&mut self){
+	pub fn camera_body(&self)->Body{
+		Body{
+			position:self.body.position+self.style.camera_offset,
+			..self.body
+		}
+	}
+	pub const fn camera(&self)->PhysicsCamera{
+		self.camera
+	}
+	pub fn clear(&mut self){
 		self.touching.clear();
 	}
 	fn reset_to_default(&mut self){
@@ -917,46 +906,67 @@ impl PhysicsState{
 	// 	});
 	// }
 }
-
-#[derive(Default)]
-pub struct PhysicsContext{
-	state:PhysicsState,//this captures the entire state of the physics.
-	data:PhysicsData,//data currently loaded into memory which is needded for physics to run, but is not part of the state.
+// shared geometry for simulations
+pub struct PhysicsData{
+	//permanent map data
+	bvh:bvh::BvhNode<ConvexMeshId>,
+	//transient map/environment data (open world loads/unloads parts of this data)
+	models:PhysicsModels,
+	//semi-transient data
+	modes:gameplay_modes::Modes,
+	//cached calculations
+	hitbox_mesh:HitboxMesh,
+}
+impl Default for PhysicsData{
+	fn default()->Self{
+ 		Self{
+			bvh:bvh::BvhNode::default(),
+			models:Default::default(),
+			modes:Default::default(),
+			hitbox_mesh:StyleModifiers::default().calculate_mesh(),
+		}
+	}
+}
+// the collection of information required to run physics
+pub struct PhysicsContext<'a>{
+	state:&'a mut PhysicsState,//this captures the entire state of the physics.
+	data:&'a PhysicsData,//data currently loaded into memory which is needded for physics to run, but is not part of the state.
 }
 // the physics consumes both Instruction and PhysicsInternalInstruction,
 // but can only emit PhysicsInternalInstruction
-impl InstructionConsumer<InternalInstruction> for PhysicsContext{
+impl InstructionConsumer<InternalInstruction> for PhysicsContext<'_>{
 	type TimeInner=TimeInner;
 	fn process_instruction(&mut self,ins:TimedInstruction<InternalInstruction,TimeInner>){
 		atomic_internal_instruction(&mut self.state,&self.data,ins)
 	}
 }
-impl InstructionConsumer<Instruction> for PhysicsContext{
+impl InstructionConsumer<Instruction> for PhysicsContext<'_>{
 	type TimeInner=TimeInner;
 	fn process_instruction(&mut self,ins:TimedInstruction<Instruction,TimeInner>){
 		atomic_input_instruction(&mut self.state,&self.data,ins)
 	}
 }
-impl InstructionEmitter<InternalInstruction> for PhysicsContext{
+impl InstructionEmitter<InternalInstruction> for PhysicsContext<'_>{
 	type TimeInner=TimeInner;
 	//this little next instruction function could cache its return value and invalidate the cached value by watching the State.
 	fn next_instruction(&self,time_limit:Time)->Option<TimedInstruction<InternalInstruction,TimeInner>>{
 		next_instruction_internal(&self.state,&self.data,time_limit)
 	}
 }
-impl PhysicsContext{
-	pub fn camera_body(&self)->Body{
-		Body{
-			position:self.state.body.position+self.state.style.camera_offset,
-			..self.state.body
+impl PhysicsContext<'_>{
+	pub fn run_input_instruction(
+		state:&mut PhysicsState,
+		data:&PhysicsData,
+		instruction:TimedInstruction<Instruction,TimeInner>
+	){
+		let mut context=PhysicsContext{state,data};
+		context.process_exhaustive(instruction.time);
+		context.process_instruction(instruction);
 	}
 }
-	pub const fn camera(&self)->PhysicsCamera{
-		self.state.camera
-	}
+impl PhysicsData{
 	/// use with caution, this is the only non-instruction way to mess with physics
 	pub fn generate_models(&mut self,map:&map::CompleteMap){
-		self.state.clear();
 		let mut modes=map.modes.clone();
 		for mode in &mut modes.modes{
 			mode.denormalize_data();
@@ -1087,17 +1097,12 @@ impl PhysicsContext{
 					(IntersectAttributesId::new(attr_id as u32),attr)
 				).collect(),
 		};
-		self.data.bvh=bvh;
-		self.data.models=models;
-		self.data.modes=modes;
+		self.bvh=bvh;
+		self.models=models;
+		self.modes=modes;
 		//hitbox_mesh is unchanged
 		println!("Physics Objects: {}",model_count);
 	}
-
-	pub fn run_input_instruction(&mut self,instruction:TimedInstruction<Instruction,TimeInner>){
-		self.process_exhaustive(instruction.time);
-		self.process_instruction(instruction);
-	}
 }
 
 	//this is the one who asks

strafe-client/src/physics_worker.rs

@@ -21,7 +21,7 @@ pub fn new<'a>(
 	mut graphics_worker:crate::compat_worker::INWorker<'a,crate::graphics_worker::Instruction>,
 	user_settings:crate::settings::UserSettings,
 )->crate::compat_worker::QNWorker<'a,TimedInstruction<Instruction,SessionTimeInner>>{
-	let physics=crate::physics::PhysicsContext::default();
+	let physics=crate::physics::PhysicsState::default();
 	let timer=Timer::unpaused(SessionTime::ZERO,PhysicsTime::ZERO);
 	let simulation=Simulation::new(timer,physics);
 	let mut session=Session::new(

strafe-client/src/session.rs

@@ -14,6 +14,7 @@ use strafesnet_common::timer::{Scaled,Timer};
 use strafesnet_common::session::{TimeInner as SessionTimeInner,Time as SessionTime};
 
 use crate::mouse_interpolator::{MouseInterpolator,StepInstruction,Instruction as MouseInterpolatorInstruction};
+use crate::physics::{PhysicsContext,PhysicsData};
 use crate::settings::UserSettings;
 
 pub enum Instruction<'a>{
@@ -60,12 +61,12 @@ pub struct FrameState{
 
 pub struct Simulation{
 	timer:Timer<Scaled<SessionTimeInner,PhysicsTimeInner>>,
-	physics:crate::physics::PhysicsContext,
+	physics:crate::physics::PhysicsState,
 }
 impl Simulation{
 	pub const fn new(
 		timer:Timer<Scaled<SessionTimeInner,PhysicsTimeInner>>,
-		physics:crate::physics::PhysicsContext,
+		physics:crate::physics::PhysicsState,
 	)->Self{
 		Self{
 			timer,
@@ -106,12 +107,12 @@ impl Replay{
 			simulation,
 		}
 	}
-	pub fn advance(&mut self,time_limit:SessionTime){
+	pub fn advance(&mut self,physics_data:&PhysicsData,time_limit:SessionTime){
 		let mut time=self.simulation.timer.time(time_limit);
 		loop{
 			if let Some(ins)=self.recording.instructions.get(self.last_instruction_id){
 				if ins.time<time{
-					self.simulation.physics.run_input_instruction(ins.clone());
+					PhysicsContext::run_input_instruction(&mut self.simulation.physics,physics_data,ins.clone());
 					self.last_instruction_id+=1;
 				}else{
 					break;
@@ -144,6 +145,7 @@ pub struct Session{
 	mouse_interpolator:crate::mouse_interpolator::MouseInterpolator,
 	view_state:ViewState,
 	//gui:GuiState
+	geometry_shared:crate::physics::PhysicsData,
 	simulation:Simulation,
 	// below fields not included in lite session
 	recording:Recording,
@@ -158,6 +160,7 @@ impl Session{
 		Self{
 			user_settings,
 			mouse_interpolator:MouseInterpolator::new(),
+			geometry_shared:Default::default(),
 			simulation,
 			view_state:ViewState::Play,
 			recording:Default::default(),
@@ -168,7 +171,8 @@ impl Session{
 		self.recording.clear();
 	}
 	fn change_map(&mut self,map:&strafesnet_common::map::CompleteMap){
-		self.simulation.physics.generate_models(map);
+		self.simulation.physics.clear();
+		self.geometry_shared.generate_models(map);
 	}
 	pub fn get_frame_state(&self,time:SessionTime)->Option<FrameState>{
 		match &self.view_state{
@@ -339,7 +343,7 @@ impl InstructionConsumer<Instruction<'_>> for Session{
 				// this just refreshes the replays
 				for replay in self.replays.values_mut(){
 					// TODO: filter idles from recording, inject new idles in real time
-					replay.advance(ins.time);
+					replay.advance(&self.geometry_shared,ins.time);
 				}
 			}
 		};
@@ -355,7 +359,7 @@ impl InstructionConsumer<StepInstruction> for Session{
 		if let Some(instruction)=self.mouse_interpolator.pop_buffered_instruction(ins.set_time(time)){
 			//record
 			self.recording.instructions.push(instruction.clone());
-			self.simulation.physics.run_input_instruction(instruction);
+			PhysicsContext::run_input_instruction(&mut self.simulation.physics,&self.geometry_shared,instruction);
 		}
 	}
 }