I need to rethink Collision vs Attributes

src/physics.rs

@@ -1103,8 +1103,7 @@ impl crate::instruction::InstructionConsumer<PhysicsInstruction> for PhysicsStat
 		}
 		match ins.instruction{
 			PhysicsInstruction::CollisionStart(c)=>{
-				let model=c.model(&self.models).unwrap();
-				match &model.attributes{
+				match self.models.attr(c.model_id()){
 					PhysicsCollisionAttributes::Contact{contacting,general}=>{
 						let mut v=self.body.velocity;
 						match &contacting.contact_behaviour{