- particle set weight operator (Shift + K) and from the menu. - mirror vertex groups operator can also flip weight group names. a number of utility functions for weight groups added int *get_defgroup_flip_map(struct Object *ob); void flip_vertexgroup_name (char *name_r, const char *name, int strip_number); // moved from modifier.c void copy_defvert (struct MDeformVert *dvert_r, const struct MDeformVert *dvert); void flip_defvert (struct MDeformVert *dvert, int *flip_map);