do not step physics on mouse input, only update pos (overwriting previous pos)

src/body.rs

@@ -102,7 +102,7 @@ pub struct MouseInterpolationState {
 impl MouseInterpolationState {
 	pub fn new() -> Self {
 		Self {
-			interpolation:MouseInterpolation::Lerp,
+			interpolation:MouseInterpolation::First,
 			time0:0,
 			time1:1,//ONE NANOSECOND!!!! avoid divide by zero
 			mouse0:glam::IVec2::ZERO,
@@ -902,6 +902,7 @@ impl crate::instruction::InstructionConsumer<PhysicsInstruction> for PhysicsStat
 		}
 		//selectively update body
 		match &ins.instruction {
+		    PhysicsInstruction::Input(InputInstruction::MoveMouse(_)) => (),//dodge time for mouse movement
     		PhysicsInstruction::Input(_)
 		    |PhysicsInstruction::ReachWalkTargetVelocity
 		    |PhysicsInstruction::CollisionStart(_)

src/main.rs

@@ -495,7 +495,6 @@ impl strafe_client::framework::Example for Skybox {
 	fn device_event(&mut self, event: winit::event::DeviceEvent) {
 		//there's no way this is the best way get a timestamp.
 		let time=self.start_time.elapsed().as_nanos() as i64;
-		self.physics.run(time);//call it a day
 		match event {
 			winit::event::DeviceEvent::Key(winit::event::KeyboardInput {
 				state,
@@ -519,6 +518,7 @@ impl strafe_client::framework::Example for Skybox {
 					_ => None,
 				}
 				{
+					self.physics.run(time);
 					self.physics.process_instruction(TimedInstruction{
 						time,
 						instruction:PhysicsInstruction::Input(input_instruction),
@@ -528,6 +528,9 @@ impl strafe_client::framework::Example for Skybox {
 			winit::event::DeviceEvent::MouseMotion {
 			    delta,//these (f64,f64) are integers on my machine
 			} => {
+				//do not step the physics because the mouse polling rate is higher than the physics can run.
+				//essentially the previous input will be overwritten until a true step runs
+				//which is fine because they run all the time.
 				self.physics.process_instruction(TimedInstruction{
 					time,
 					instruction:PhysicsInstruction::Input(InputInstruction::MoveMouse(glam::ivec2(delta.0 as i32,delta.1 as i32))),
@@ -538,6 +541,7 @@ impl strafe_client::framework::Example for Skybox {
 			} => {
 				println!("mousewheel{:?}",delta);
 				if true{//self.physics.use_scroll
+					self.physics.run(time);
 					self.physics.process_instruction(TimedInstruction{
 						time,
 						instruction:PhysicsInstruction::Input(InputInstruction::Jump(true)),//activates the immediate jump path, but the style modifier prevents controls&CONTROL_JUMP bit from being set to auto jump