public virtual void Draw(GameTime gameTime, IDebugDraw debugDraw)
        {
            space.DebugDraw(debugDraw);

            var colorMagenta = new DebugColor(1, 0, 1, 1);

            debugDraw.DrawCircle(ChipmunkDemoGame.ChipmunkDemoMouse, 0.0, 5, colorMagenta, colorMagenta);
        }
        private static void SpaceDebugDrawCircleCallback(Vect pos, double angle, double radius, DebugColor outlineColor, DebugColor fillColor, voidptr_t data)
        {
            IDebugDraw debugDraw = NativeInterop.FromIntPtr <IDebugDraw>(data);

            debugDraw.DrawCircle(pos, angle, radius, outlineColor, fillColor);
        }