fix: angle negation for Pymunk physics engine to ensure correct sprite rotation (#2840)

lokman928 · web-flow · commit 535d349ea6be · 2026-04-16T12:47:33.000-04:00
diff --git a/arcade/pymunk_physics_engine.py b/arcade/pymunk_physics_engine.py
@@ -266,7 +266,7 @@ def add_sprite(
 
         # Set the body's position
         body.position = pymunk.Vec2d(sprite.center_x, sprite.center_y)
-        body.angle = math.radians(sprite.angle)
+        body.angle = math.radians(-sprite.angle)
 
         # Callback used if we need custom gravity, damping, velocity, etc.
         def velocity_callback(
@@ -514,7 +514,7 @@ def set_rotation(self, sprite: Sprite, rotation: float) -> None:
             raise PymunkException(
                 "Tried to set a rotation, but this physics object has no 'body' set."
             )
-        physics_object.body.angle = math.radians(rotation)
+        physics_object.body.angle = math.radians(-rotation)
 
     def set_velocity(self, sprite: Sprite, velocity: tuple[float, float]) -> None:
         """Directly set the velocity of a sprite known to the engine.
