Add pivot offset for rotations.

DaggerFramework/Source/SceneGraph/Entities/Particles2d.cs

@@ -31,7 +31,7 @@ namespace DaggerFramework.SceneGraph
                 var scale = MathUtils.Lerp(_settings.ScaleEnd, _settings.ScaleBegin, t);
                 var color = MathUtils.LerpColor(_settings.ColorEnd, _settings.ColorBegin, t);
 
-                renderer.SetTransform(particle.Position, particle.Rotation);
+                renderer.SetTransform(particle.Position, Vector2.Zero, particle.Rotation);
                 renderer.DrawRectangle(Vector2.One * scale, color);
             }
         }