Commit: cb2565195e72ee4dc5c0b53b7cd5037b2169d55f Author: Sybren A. Stüvel Date: Thu Aug 13 12:53:21 2020 +0200 Branches: master https://developer.blender.org/rBcb2565195e72ee4dc5c0b53b7cd5037b2169d55f
Fix T65148: Drivers can't access shape keys It was impossible for drivers to use shape key properties, modifiers generate a new mesh. After mesh evaluation the shape keys are no longer necessary, and because of this the `key` pointer was not copied. As drivers work on evaluated data, however, they do need this `key` pointer. This commit makes the `key` pointer available in evaluated meshes, but this is somewhat dangerous. There was an explicit reason why the key on result was kept at null pointer: to have the evaluated mesh in a consistent state. Assigning this pointer makes it potentially inconsistent, as the evaluated mesh and the original shape key may have different topologies. Reviewed By: sergey Differential Revision: https://developer.blender.org/D7785 =================================================================== M source/blender/blenkernel/intern/DerivedMesh.c M source/blender/bmesh/CMakeLists.txt M source/blender/bmesh/intern/bmesh_mesh_convert.c =================================================================== diff --git a/source/blender/blenkernel/intern/DerivedMesh.c b/source/blender/blenkernel/intern/DerivedMesh.c index 63e7933dd56..0dc85dfaa18 100644 --- a/source/blender/blenkernel/intern/DerivedMesh.c +++ b/source/blender/blenkernel/intern/DerivedMesh.c @@ -1810,6 +1810,12 @@ static void mesh_build_data(struct Depsgraph *depsgraph, BKE_object_boundbox_calc_from_mesh(ob, mesh_eval); + /* Make sure that drivers can target shapekey properties. + * Note that this causes a potential inconsistency, as the shapekey may have a + * different topology than the evaluated mesh. */ + BLI_assert(mesh->key == NULL || DEG_is_evaluated_id(&mesh->key->id)); + mesh_eval->key = mesh->key; + if ((ob->mode & OB_MODE_ALL_SCULPT) && ob->sculpt) { if (DEG_is_active(depsgraph)) { BKE_sculpt_update_object_after_eval(depsgraph, ob); diff --git a/source/blender/bmesh/CMakeLists.txt b/source/blender/bmesh/CMakeLists.txt index b97b5cc95f2..0eeb0d21b5b 100644 --- a/source/blender/bmesh/CMakeLists.txt +++ b/source/blender/bmesh/CMakeLists.txt @@ -23,6 +23,7 @@ set(INC ../blenkernel ../blenlib ../blentranslation + ../depsgraph ../makesdna ../../../intern/atomic ../../../intern/eigen diff --git a/source/blender/bmesh/intern/bmesh_mesh_convert.c b/source/blender/bmesh/intern/bmesh_mesh_convert.c index 8db125970fd..4671df90d53 100644 --- a/source/blender/bmesh/intern/bmesh_mesh_convert.c +++ b/source/blender/bmesh/intern/bmesh_mesh_convert.c @@ -90,6 +90,8 @@ #include "BKE_key.h" #include "BKE_main.h" +#include "DEG_depsgraph_query.h" + #include "bmesh.h" #include "intern/bmesh_private.h" /* For element checking. */ @@ -231,7 +233,13 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar /* -------------------------------------------------------------------- */ /* Shape Key */ - int tot_shape_keys = me->key ? BLI_listbase_count(&me->key->block) : 0; + int tot_shape_keys = 0; + if (me->key != NULL && DEG_is_original_id(&me->id)) { + /* Evaluated meshes can be topologically inconsistent with their shape keys. + * Shape keys are also already integrated into the state of the evaluated + * mesh, so considering them here would kind of apply them twice. */ + tot_shape_keys = BLI_listbase_count(&me->key->block); + } if (is_new == false) { tot_shape_keys = min_ii(tot_shape_keys, CustomData_number_of_layers(&bm->vdata, CD_SHAPEKEY)); } @@ -239,7 +247,7 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar BLI_array_alloca(shape_key_table, tot_shape_keys) : NULL; - if ((params->active_shapekey != 0) && (me->key != NULL)) { + if ((params->active_shapekey != 0) && tot_shape_keys > 0) { actkey = BLI_findlink(&me->key->block, params->active_shapekey - 1); } else { @@ -298,7 +306,8 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar const int cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT); const int cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT); const int cd_edge_crease_offset = CustomData_get_offset(&bm->edata, CD_CREASE); - const int cd_shape_key_offset = me->key ? CustomData_get_offset(&bm->vdata, CD_SHAPEKEY) : -1; + const int cd_shape_key_offset = tot_shape_keys ? CustomData_get_offset(&bm->vdata, CD_SHAPEKEY) : + -1; const int cd_shape_keyindex_offset = is_new && (tot_shape_keys || params->add_key_index) ? CustomData_get_offset(&bm->vdata, CD_SHAPE_KEYINDEX) : -1; _______________________________________________ Bf-blender-cvs mailing list [email protected] https://lists.blender.org/mailman/listinfo/bf-blender-cvs
