b019e4235a
Prior to this commit, variables inside `StrokeCache` used either a `true_` prefix to indicate that the relevant position / normal / displacement was not modified by symmetry, or a `_symmetry` / `_symm` suffix to indicate that it was. This commit changes all such variables to have a `_symm` suffix, as that has fewer connotations than the `true_` prefix. Pull Request: https://projects.blender.org/blender/blender/pulls/126902