I annotated a screenshot with winding numbers. You'll see that the filled areas correspond to the parts with non-zero winding numbers, but the physics simulatio

I annotated a screenshot with winding numbers. You'll see that the filled areas correspond to the parts with non-zero winding numbers, but the physics simulation considers the sign and magnitude. https://i.imgur.com/3OLflHc.png https://i.imgur.com/3OLflHc.png