Welcome to mirror list, hosted at ThFree Co, Russian Federation.

git.blender.org/blender.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
path: root/source/blender/blenkernel/intern/mesh_wrapper.cc
diff options
context:
space:
mode:
Diffstat (limited to 'source/blender/blenkernel/intern/mesh_wrapper.cc')
-rw-r--r--source/blender/blenkernel/intern/mesh_wrapper.cc380
1 files changed, 380 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/mesh_wrapper.cc b/source/blender/blenkernel/intern/mesh_wrapper.cc
new file mode 100644
index 00000000000..8291765c2ef
--- /dev/null
+++ b/source/blender/blenkernel/intern/mesh_wrapper.cc
@@ -0,0 +1,380 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup bke
+ *
+ * The primary purpose of this API is to avoid unnecessary mesh conversion for the final
+ * output of a modified mesh.
+ *
+ * This API handles the case when the modifier stack outputs a mesh which does not have
+ * #Mesh data (#MPoly, #MLoop, #MEdge, #MVert).
+ * Currently this is used so the resulting mesh can have #BMEditMesh data,
+ * postponing the converting until it's needed or avoiding conversion entirely
+ * which can be an expensive operation.
+ * Once converted, the meshes type changes to #ME_WRAPPER_TYPE_MDATA,
+ * although the edit mesh is not cleared.
+ *
+ * This API exposes functions that abstract over the different kinds of internal data,
+ * as well as supporting converting the mesh into regular mesh.
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "DNA_mesh_types.h"
+#include "DNA_meshdata_types.h"
+#include "DNA_modifier_types.h"
+#include "DNA_object_types.h"
+
+#include "BLI_ghash.h"
+#include "BLI_math.h"
+#include "BLI_task.hh"
+#include "BLI_threads.h"
+#include "BLI_utildefines.h"
+
+#include "BKE_editmesh.h"
+#include "BKE_editmesh_cache.h"
+#include "BKE_lib_id.h"
+#include "BKE_mesh.h"
+#include "BKE_mesh_runtime.h"
+#include "BKE_mesh_wrapper.h"
+#include "BKE_modifier.h"
+#include "BKE_object.h"
+#include "BKE_subdiv.h"
+#include "BKE_subdiv_mesh.h"
+#include "BKE_subdiv_modifier.h"
+
+#include "DEG_depsgraph.h"
+#include "DEG_depsgraph_query.h"
+
+Mesh *BKE_mesh_wrapper_from_editmesh_with_coords(BMEditMesh *em,
+ const CustomData_MeshMasks *cd_mask_extra,
+ const float (*vert_coords)[3],
+ const Mesh *me_settings)
+{
+ Mesh *me = static_cast<Mesh *>(BKE_id_new_nomain(ID_ME, nullptr));
+ BKE_mesh_copy_parameters_for_eval(me, me_settings);
+ BKE_mesh_runtime_ensure_edit_data(me);
+
+ me->runtime.wrapper_type = ME_WRAPPER_TYPE_BMESH;
+ if (cd_mask_extra) {
+ me->runtime.cd_mask_extra = *cd_mask_extra;
+ }
+
+ /* Use edit-mesh directly where possible. */
+ me->runtime.is_original = true;
+
+ me->edit_mesh = static_cast<BMEditMesh *>(MEM_dupallocN(em));
+ me->edit_mesh->is_shallow_copy = true;
+
+ /* Make sure we crash if these are ever used. */
+#ifdef DEBUG
+ me->totvert = INT_MAX;
+ me->totedge = INT_MAX;
+ me->totpoly = INT_MAX;
+ me->totloop = INT_MAX;
+#else
+ me->totvert = 0;
+ me->totedge = 0;
+ me->totpoly = 0;
+ me->totloop = 0;
+#endif
+
+ EditMeshData *edit_data = me->runtime.edit_data;
+ edit_data->vertexCos = vert_coords;
+ return me;
+}
+
+Mesh *BKE_mesh_wrapper_from_editmesh(BMEditMesh *em,
+ const CustomData_MeshMasks *cd_mask_extra,
+ const Mesh *me_settings)
+{
+ return BKE_mesh_wrapper_from_editmesh_with_coords(em, cd_mask_extra, nullptr, me_settings);
+}
+
+void BKE_mesh_wrapper_ensure_mdata(Mesh *me)
+{
+ ThreadMutex *mesh_eval_mutex = (ThreadMutex *)me->runtime.eval_mutex;
+ BLI_mutex_lock(mesh_eval_mutex);
+
+ if (me->runtime.wrapper_type == ME_WRAPPER_TYPE_MDATA) {
+ BLI_mutex_unlock(mesh_eval_mutex);
+ return;
+ }
+
+ /* Must isolate multithreaded tasks while holding a mutex lock. */
+ blender::threading::isolate_task([&]() {
+ const eMeshWrapperType geom_type_orig = static_cast<eMeshWrapperType>(
+ me->runtime.wrapper_type);
+ me->runtime.wrapper_type = ME_WRAPPER_TYPE_MDATA;
+
+ switch (geom_type_orig) {
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD: {
+ break; /* Quiet warning. */
+ }
+ case ME_WRAPPER_TYPE_BMESH: {
+ me->totvert = 0;
+ me->totedge = 0;
+ me->totpoly = 0;
+ me->totloop = 0;
+
+ BLI_assert(me->edit_mesh != nullptr);
+ BLI_assert(me->runtime.edit_data != nullptr);
+
+ BMEditMesh *em = me->edit_mesh;
+ BM_mesh_bm_to_me_for_eval(em->bm, me, &me->runtime.cd_mask_extra);
+
+ /* Adding original index layers assumes that all BMesh mesh wrappers are created from
+ * original edit mode meshes (the only case where adding original indices makes sense).
+ * If that assumption is broken, the layers might be incorrect in that they might not
+ * actually be "original".
+ *
+ * There is also a performance aspect, where this also assumes that original indices are
+ * always needed when converting an edit mesh to a mesh. That might be wrong, but it's not
+ * harmful. */
+ BKE_mesh_ensure_default_orig_index_customdata(me);
+
+ EditMeshData *edit_data = me->runtime.edit_data;
+ if (edit_data->vertexCos) {
+ BKE_mesh_vert_coords_apply(me, edit_data->vertexCos);
+ me->runtime.is_original = false;
+ }
+ break;
+ }
+ }
+
+ if (me->runtime.wrapper_type_finalize) {
+ BKE_mesh_wrapper_deferred_finalize(me, &me->runtime.cd_mask_extra);
+ }
+ });
+
+ BLI_mutex_unlock(mesh_eval_mutex);
+}
+
+bool BKE_mesh_wrapper_minmax(const Mesh *me, float min[3], float max[3])
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH:
+ return BKE_editmesh_cache_calc_minmax(me->edit_mesh, me->runtime.edit_data, min, max);
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD:
+ return BKE_mesh_minmax(me, min, max);
+ }
+ BLI_assert_unreachable();
+ return false;
+}
+
+/* -------------------------------------------------------------------- */
+/** \name Mesh Coordinate Access
+ * \{ */
+
+void BKE_mesh_wrapper_vert_coords_copy(const Mesh *me,
+ float (*vert_coords)[3],
+ int vert_coords_len)
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH: {
+ BMesh *bm = me->edit_mesh->bm;
+ BLI_assert(vert_coords_len <= bm->totvert);
+ EditMeshData *edit_data = me->runtime.edit_data;
+ if (edit_data->vertexCos != nullptr) {
+ for (int i = 0; i < vert_coords_len; i++) {
+ copy_v3_v3(vert_coords[i], edit_data->vertexCos[i]);
+ }
+ }
+ else {
+ BMIter iter;
+ BMVert *v;
+ int i;
+ BM_ITER_MESH_INDEX (v, &iter, bm, BM_VERTS_OF_MESH, i) {
+ copy_v3_v3(vert_coords[i], v->co);
+ }
+ }
+ return;
+ }
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD: {
+ BLI_assert(vert_coords_len <= me->totvert);
+ const MVert *mvert = me->mvert;
+ for (int i = 0; i < vert_coords_len; i++) {
+ copy_v3_v3(vert_coords[i], mvert[i].co);
+ }
+ return;
+ }
+ }
+ BLI_assert_unreachable();
+}
+
+void BKE_mesh_wrapper_vert_coords_copy_with_mat4(const Mesh *me,
+ float (*vert_coords)[3],
+ int vert_coords_len,
+ const float mat[4][4])
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH: {
+ BMesh *bm = me->edit_mesh->bm;
+ BLI_assert(vert_coords_len == bm->totvert);
+ EditMeshData *edit_data = me->runtime.edit_data;
+ if (edit_data->vertexCos != nullptr) {
+ for (int i = 0; i < vert_coords_len; i++) {
+ mul_v3_m4v3(vert_coords[i], mat, edit_data->vertexCos[i]);
+ }
+ }
+ else {
+ BMIter iter;
+ BMVert *v;
+ int i;
+ BM_ITER_MESH_INDEX (v, &iter, bm, BM_VERTS_OF_MESH, i) {
+ mul_v3_m4v3(vert_coords[i], mat, v->co);
+ }
+ }
+ return;
+ }
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD: {
+ BLI_assert(vert_coords_len == me->totvert);
+ const MVert *mvert = me->mvert;
+ for (int i = 0; i < vert_coords_len; i++) {
+ mul_v3_m4v3(vert_coords[i], mat, mvert[i].co);
+ }
+ return;
+ }
+ }
+ BLI_assert_unreachable();
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Mesh Array Length Access
+ * \{ */
+
+int BKE_mesh_wrapper_vert_len(const Mesh *me)
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH:
+ return me->edit_mesh->bm->totvert;
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD:
+ return me->totvert;
+ }
+ BLI_assert_unreachable();
+ return -1;
+}
+
+int BKE_mesh_wrapper_edge_len(const Mesh *me)
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH:
+ return me->edit_mesh->bm->totedge;
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD:
+ return me->totedge;
+ }
+ BLI_assert_unreachable();
+ return -1;
+}
+
+int BKE_mesh_wrapper_loop_len(const Mesh *me)
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH:
+ return me->edit_mesh->bm->totloop;
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD:
+ return me->totloop;
+ }
+ BLI_assert_unreachable();
+ return -1;
+}
+
+int BKE_mesh_wrapper_poly_len(const Mesh *me)
+{
+ switch ((eMeshWrapperType)me->runtime.wrapper_type) {
+ case ME_WRAPPER_TYPE_BMESH:
+ return me->edit_mesh->bm->totface;
+ case ME_WRAPPER_TYPE_MDATA:
+ case ME_WRAPPER_TYPE_SUBD:
+ return me->totpoly;
+ }
+ BLI_assert_unreachable();
+ return -1;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name CPU Subdivision Evaluation
+ * \{ */
+
+static Mesh *mesh_wrapper_ensure_subdivision(const Object *ob, Mesh *me)
+{
+ SubsurfModifierData *smd = BKE_object_get_last_subsurf_modifier(ob);
+ if (!smd) {
+ return me;
+ }
+
+ /* Initialize the settings before ensuring the descriptor as this is checked to decide whether
+ * subdivision is needed at all, and checking the descriptor status might involve checking if the
+ * data is out-of-date, which is a very expensive operation. */
+ SubdivToMeshSettings mesh_settings;
+ mesh_settings.resolution = me->runtime.subsurf_resolution;
+ mesh_settings.use_optimal_display = me->runtime.subsurf_use_optimal_display;
+
+ if (mesh_settings.resolution < 3) {
+ return me;
+ }
+
+ const bool apply_render = me->runtime.subsurf_apply_render;
+
+ SubdivSettings subdiv_settings;
+ BKE_subsurf_modifier_subdiv_settings_init(&subdiv_settings, smd, apply_render);
+ if (subdiv_settings.level == 0) {
+ return me;
+ }
+
+ SubsurfRuntimeData *runtime_data = BKE_subsurf_modifier_ensure_runtime(smd);
+
+ Subdiv *subdiv = BKE_subsurf_modifier_subdiv_descriptor_ensure(smd, &subdiv_settings, me, false);
+ if (subdiv == nullptr) {
+ /* Happens on bad topology, but also on empty input mesh. */
+ return me;
+ }
+
+ Mesh *subdiv_mesh = BKE_subdiv_to_mesh(subdiv, &mesh_settings, me);
+
+ if (subdiv != runtime_data->subdiv) {
+ BKE_subdiv_free(subdiv);
+ }
+
+ if (subdiv_mesh != me) {
+ if (me->runtime.mesh_eval != nullptr) {
+ BKE_id_free(nullptr, me->runtime.mesh_eval);
+ }
+ me->runtime.mesh_eval = subdiv_mesh;
+ me->runtime.wrapper_type = ME_WRAPPER_TYPE_SUBD;
+ }
+
+ return me->runtime.mesh_eval;
+}
+
+Mesh *BKE_mesh_wrapper_ensure_subdivision(const Object *ob, Mesh *me)
+{
+ ThreadMutex *mesh_eval_mutex = (ThreadMutex *)me->runtime.eval_mutex;
+ BLI_mutex_lock(mesh_eval_mutex);
+
+ if (me->runtime.wrapper_type == ME_WRAPPER_TYPE_SUBD) {
+ BLI_mutex_unlock(mesh_eval_mutex);
+ return me->runtime.mesh_eval;
+ }
+
+ Mesh *result;
+
+ /* Must isolate multithreaded tasks while holding a mutex lock. */
+ blender::threading::isolate_task([&]() { result = mesh_wrapper_ensure_subdivision(ob, me); });
+
+ BLI_mutex_unlock(mesh_eval_mutex);
+ return result;
+}
+
+/** \} */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-18 10:43:40 +0300