6afd742f43
Fix a crash and dimension mismatch issue in user_flexcomp when dealing with interpolated="true" meshes that contain unused vertices. Previously, vertbody would correspond only to used vertices while vert included all vertices, leading to assertions or out-of-bounds access. Also enable node pinning for interpolated meshes. PiperOrigin-RevId: 865881995 Change-Id: Id150f00f22b5f48896ffbffddf03c57b252de8c0