diff --git a/src/physics.rs b/src/physics.rs
index 43808f6..db25b8f 100644
--- a/src/physics.rs
+++ b/src/physics.rs
@@ -488,6 +488,19 @@ enum MoveState{
 	Fly,
 }
 impl MoveState{
+	//call this after state.move_state is changed
+	fn changed(&self,body:&mut Body,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState){
+		match self{
+			MoveState::Fly=>body.acceleration=Planar64Vec3::ZERO,
+			MoveState::Air=>{
+				//calculate base acceleration
+				let a=touching.base_acceleration(models,style,camera,input_state);
+				//set_acceleration clips according to contacts
+				set_acceleration(body,touching,models,hitbox_mesh,a);
+			},
+			_=>(),
+		}
+	}
 	//function to coerce &mut self into &self
 	fn apply_to_body(&self,body:&mut Body,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState){
 		match self{
@@ -569,18 +582,6 @@ impl MoveState{
 		}
 	}
 }
-fn move_state_edge(old_move_state:&MoveState,new_move_state:&MoveState,body:&mut Body,touching:&TouchingState,models:&PhysicsModels,hitbox_mesh:&HitboxMesh,style:&StyleModifiers,camera:&PhysicsCamera,input_state:&InputState){
-	match new_move_state{
-		MoveState::Fly=>body.acceleration=Planar64Vec3::ZERO,
-		MoveState::Air=>{
-			//calculate base acceleration
-			let a=touching.base_acceleration(models,style,camera,input_state);
-			//set_acceleration clips according to contacts
-			set_acceleration(body,touching,models,hitbox_mesh,a);
-		},
-		_=>(),
-	}
-}
 
 #[derive(Clone,Default)]
 pub struct PhysicsOutputState{
@@ -955,7 +956,7 @@ impl PhysicsState {
 		self.move_state.next_move_instruction(&self.style.strafe,self.time)
 	}
 	fn set_move_state(&mut self,data:&PhysicsData,move_state:MoveState){
-		move_state_edge(&self.move_state,&move_state,&mut self.body,&self.touching,&data.models,&data.hitbox_mesh,&self.style,&self.camera,&self.input_state);
+		move_state.changed(&mut self.body,&self.touching,&data.models,&data.hitbox_mesh,&self.style,&self.camera,&self.input_state);
 		self.move_state=move_state;
 	}