https://siggraphcontact.github.io/changelog/ https://siggraphcontact.github.io/ https://siggraphcontact.github.io/assets/files/SIGGRAPH21_friction_contact_notes.pdf 2022-08-01T20:54:26+00:00 https://siggraphcontact.github.io/assets/files/SIGGRAPH22_friction_contact_notes.pdf 2022-08-01T20:54:26+00:00