ac02f94caf
Change PBVH normal calculation to also update vertices connected to vertices with an update tag. This is necessary because vertex normals are the mixed face normals, so changing any face's normal will change the normals of all connected faces. This change requires that the PBVH always have a vertex to face topology map available. In the future this will likely be cached on meshes though, which will reduce the delay it adds when entering sculpt mode. Now, first all face normals are updated, then the normals for connected vertices are mixed from the face normals. This is a significant simplification to the whole process, which previously worked with atomics and normals at the triangle level. Similar changes changes for regular non-sculpt normal calculation are being worked on in #105920. Pull Request: https://projects.blender.org/blender/blender/pulls/107458
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