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blender-archive/source/blender/blenkernel/intern/DerivedMesh.cc
Hans Goudey d20f992322 Mesh: Avoid copying positions in object mode modifier stack 
Remove the use of a separate contiguous positions array now that
they are stored that way in the first place. This allows removing the
complexity of tracking whether it is allocated and deformed in the
mesh modifier stack.

Instead of deferring the creation of the final mesh until after the
positions have been copied and deformed, create the final mesh
first and then deform its positions.

Since vertex and face normals are calculated lazily, we can rely on
individual modifiers to calculate them as necessary and simplify
the modifier stack. This was hard to change before because of the
separate array of deformed positions.

Differential Revision: https://developer.blender.org/D16971
2023-02-06 14:34:29 -05:00

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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2005 Blender Foundation. All rights reserved. */
/** \file
* \ingroup bke
*/
#include <climits>
#include <cstring>
#include "MEM_guardedalloc.h"
#include "DNA_cloth_types.h"
#include "DNA_customdata_types.h"
#include "DNA_key_types.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BLI_array.h"
#include "BLI_bitmap.h"
#include "BLI_blenlib.h"
#include "BLI_linklist.h"
#include "BLI_math.h"
#include "BLI_math_vector_types.hh"
#include "BLI_task.h"
#include "BLI_task.hh"
#include "BLI_utildefines.h"
#include "BLI_vector.hh"
#include "BKE_DerivedMesh.h"
#include "BKE_bvhutils.h"
#include "BKE_colorband.h"
#include "BKE_deform.h"
#include "BKE_editmesh.h"
#include "BKE_editmesh_cache.h"
#include "BKE_geometry_set.hh"
#include "BKE_geometry_set_instances.hh"
#include "BKE_key.h"
#include "BKE_layer.h"
#include "BKE_lib_id.h"
#include "BKE_material.h"
#include "BKE_mesh.h"
#include "BKE_mesh_iterators.h"
#include "BKE_mesh_mapping.h"
#include "BKE_mesh_runtime.h"
#include "BKE_mesh_tangent.h"
#include "BKE_mesh_wrapper.h"
#include "BKE_modifier.h"
#include "BKE_multires.h"
#include "BKE_object.h"
#include "BKE_object_deform.h"
#include "BKE_paint.h"
#include "BKE_subdiv_modifier.h"
#include "BLI_sys_types.h" /* for intptr_t support */
#include "BKE_shrinkwrap.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
#include "CLG_log.h"
#ifdef WITH_OPENSUBDIV
# include "DNA_userdef_types.h"
#endif
using blender::float3;
using blender::IndexRange;
using blender::Span;
using blender::VArray;
/* very slow! enable for testing only! */
//#define USE_MODIFIER_VALIDATE
#ifdef USE_MODIFIER_VALIDATE
# define ASSERT_IS_VALID_MESH(mesh) \
(BLI_assert((mesh == nullptr) || (BKE_mesh_is_valid(mesh) == true)))
#else
# define ASSERT_IS_VALID_MESH(mesh)
#endif
static ThreadRWMutex loops_cache_lock = PTHREAD_RWLOCK_INITIALIZER;
static void mesh_init_origspace(Mesh *mesh);
static void editbmesh_calc_modifier_final_normals(Mesh *mesh_final,
const CustomData_MeshMasks *final_datamask);
static void editbmesh_calc_modifier_final_normals_or_defer(
Mesh *mesh_final, const CustomData_MeshMasks *final_datamask);
/* -------------------------------------------------------------------- */
static float *dm_getVertArray(DerivedMesh *dm)
{
float(*positions)[3] = (float(*)[3])CustomData_get_layer_named_for_write(
&dm->vertData, CD_PROP_FLOAT3, "position", dm->getNumVerts(dm));
if (!positions) {
positions = (float(*)[3])CustomData_add_layer_named(
&dm->vertData, CD_PROP_FLOAT3, CD_SET_DEFAULT, nullptr, dm->getNumVerts(dm), "position");
CustomData_set_layer_flag(&dm->vertData, CD_PROP_FLOAT3, CD_FLAG_TEMPORARY);
dm->copyVertArray(dm, positions);
}
return (float *)positions;
}
static MEdge *dm_getEdgeArray(DerivedMesh *dm)
{
MEdge *medge = (MEdge *)CustomData_get_layer_for_write(
&dm->edgeData, CD_MEDGE, dm->getNumEdges(dm));
if (!medge) {
medge = (MEdge *)CustomData_add_layer(
&dm->edgeData, CD_MEDGE, CD_SET_DEFAULT, nullptr, dm->getNumEdges(dm));
CustomData_set_layer_flag(&dm->edgeData, CD_MEDGE, CD_FLAG_TEMPORARY);
dm->copyEdgeArray(dm, medge);
}
return medge;
}
static MLoop *dm_getLoopArray(DerivedMesh *dm)
{
MLoop *mloop = (MLoop *)CustomData_get_layer_for_write(
&dm->loopData, CD_MLOOP, dm->getNumLoops(dm));
if (!mloop) {
mloop = (MLoop *)CustomData_add_layer(
&dm->loopData, CD_MLOOP, CD_SET_DEFAULT, nullptr, dm->getNumLoops(dm));
CustomData_set_layer_flag(&dm->loopData, CD_MLOOP, CD_FLAG_TEMPORARY);
dm->copyLoopArray(dm, mloop);
}
return mloop;
}
static MPoly *dm_getPolyArray(DerivedMesh *dm)
{
MPoly *mpoly = (MPoly *)CustomData_get_layer_for_write(
&dm->polyData, CD_MPOLY, dm->getNumPolys(dm));
if (!mpoly) {
mpoly = (MPoly *)CustomData_add_layer(
&dm->polyData, CD_MPOLY, CD_SET_DEFAULT, nullptr, dm->getNumPolys(dm));
CustomData_set_layer_flag(&dm->polyData, CD_MPOLY, CD_FLAG_TEMPORARY);
dm->copyPolyArray(dm, mpoly);
}
return mpoly;
}
static int dm_getNumLoopTri(DerivedMesh *dm)
{
const int numlooptris = poly_to_tri_count(dm->getNumPolys(dm), dm->getNumLoops(dm));
BLI_assert(ELEM(dm->looptris.num, 0, numlooptris));
return numlooptris;
}
static const MLoopTri *dm_getLoopTriArray(DerivedMesh *dm)
{
MLoopTri *looptri;
BLI_rw_mutex_lock(&loops_cache_lock, THREAD_LOCK_READ);
looptri = dm->looptris.array;
BLI_rw_mutex_unlock(&loops_cache_lock);
if (looptri != nullptr) {
BLI_assert(dm->getNumLoopTri(dm) == dm->looptris.num);
}
else {
BLI_rw_mutex_lock(&loops_cache_lock, THREAD_LOCK_WRITE);
/* We need to ensure array is still nullptr inside mutex-protected code,
* some other thread might have already recomputed those looptris. */
if (dm->looptris.array == nullptr) {
dm->recalcLoopTri(dm);
}
looptri = dm->looptris.array;
BLI_rw_mutex_unlock(&loops_cache_lock);
}
return looptri;
}
void DM_init_funcs(DerivedMesh *dm)
{
/* default function implementations */
dm->getVertArray = dm_getVertArray;
dm->getEdgeArray = dm_getEdgeArray;
dm->getLoopArray = dm_getLoopArray;
dm->getPolyArray = dm_getPolyArray;
dm->getLoopTriArray = dm_getLoopTriArray;
/* Sub-types handle getting actual data. */
dm->getNumLoopTri = dm_getNumLoopTri;
dm->getVertDataArray = DM_get_vert_data_layer;
dm->getEdgeDataArray = DM_get_edge_data_layer;
dm->getPolyDataArray = DM_get_poly_data_layer;
dm->getLoopDataArray = DM_get_loop_data_layer;
}
void DM_init(DerivedMesh *dm,
DerivedMeshType type,
int numVerts,
int numEdges,
int numTessFaces,
int numLoops,
int numPolys)
{
dm->type = type;
dm->numVertData = numVerts;
dm->numEdgeData = numEdges;
dm->numTessFaceData = numTessFaces;
dm->numLoopData = numLoops;
dm->numPolyData = numPolys;
DM_init_funcs(dm);
dm->needsFree = 1;
/* Don't use #CustomData_reset because we don't want to touch custom-data. */
copy_vn_i(dm->vertData.typemap, CD_NUMTYPES, -1);
copy_vn_i(dm->edgeData.typemap, CD_NUMTYPES, -1);
copy_vn_i(dm->faceData.typemap, CD_NUMTYPES, -1);
copy_vn_i(dm->loopData.typemap, CD_NUMTYPES, -1);
copy_vn_i(dm->polyData.typemap, CD_NUMTYPES, -1);
}
void DM_from_template(DerivedMesh *dm,
DerivedMesh *source,
DerivedMeshType type,
int numVerts,
int numEdges,
int numTessFaces,
int numLoops,
int numPolys)
{
const CustomData_MeshMasks *mask = &CD_MASK_DERIVEDMESH;
CustomData_copy(&source->vertData, &dm->vertData, mask->vmask, CD_SET_DEFAULT, numVerts);
CustomData_copy(&source->edgeData, &dm->edgeData, mask->emask, CD_SET_DEFAULT, numEdges);
CustomData_copy(&source->faceData, &dm->faceData, mask->fmask, CD_SET_DEFAULT, numTessFaces);
CustomData_copy(&source->loopData, &dm->loopData, mask->lmask, CD_SET_DEFAULT, numLoops);
CustomData_copy(&source->polyData, &dm->polyData, mask->pmask, CD_SET_DEFAULT, numPolys);
dm->type = type;
dm->numVertData = numVerts;
dm->numEdgeData = numEdges;
dm->numTessFaceData = numTessFaces;
dm->numLoopData = numLoops;
dm->numPolyData = numPolys;
DM_init_funcs(dm);
dm->needsFree = 1;
}
bool DM_release(DerivedMesh *dm)
{
if (dm->needsFree) {
CustomData_free(&dm->vertData, dm->numVertData);
CustomData_free(&dm->edgeData, dm->numEdgeData);
CustomData_free(&dm->faceData, dm->numTessFaceData);
CustomData_free(&dm->loopData, dm->numLoopData);
CustomData_free(&dm->polyData, dm->numPolyData);
MEM_SAFE_FREE(dm->looptris.array);
dm->looptris.num = 0;
dm->looptris.num_alloc = 0;
return true;
}
CustomData_free_temporary(&dm->vertData, dm->numVertData);
CustomData_free_temporary(&dm->edgeData, dm->numEdgeData);
CustomData_free_temporary(&dm->faceData, dm->numTessFaceData);
CustomData_free_temporary(&dm->loopData, dm->numLoopData);
CustomData_free_temporary(&dm->polyData, dm->numPolyData);
return false;
}
void DM_ensure_looptri_data(DerivedMesh *dm)
{
const uint totpoly = dm->numPolyData;
const uint totloop = dm->numLoopData;
const int looptris_num = poly_to_tri_count(totpoly, totloop);
BLI_assert(dm->looptris.array_wip == nullptr);
std::swap(dm->looptris.array, dm->looptris.array_wip);
if ((looptris_num > dm->looptris.num_alloc) || (looptris_num < dm->looptris.num_alloc * 2) ||
(totpoly == 0)) {
MEM_SAFE_FREE(dm->looptris.array_wip);
dm->looptris.num_alloc = 0;
dm->looptris.num = 0;
}
if (totpoly) {
if (dm->looptris.array_wip == nullptr) {
dm->looptris.array_wip = (MLoopTri *)MEM_malloc_arrayN(
looptris_num, sizeof(*dm->looptris.array_wip), __func__);
dm->looptris.num_alloc = looptris_num;
}
dm->looptris.num = looptris_num;
}
}
void BKE_mesh_runtime_eval_to_meshkey(Mesh *me_deformed, Mesh *me, KeyBlock *kb)
{
/* Just a shallow wrapper around #BKE_keyblock_convert_from_mesh,
* that ensures both evaluated mesh and original one has same number of vertices. */
const int totvert = me_deformed->totvert;
if (totvert == 0 || me->totvert == 0 || me->totvert != totvert) {
return;
}
BKE_keyblock_convert_from_mesh(me_deformed, me->key, kb);
}
void DM_set_only_copy(DerivedMesh *dm, const CustomData_MeshMasks *mask)
{
CustomData_set_only_copy(&dm->vertData, mask->vmask);
CustomData_set_only_copy(&dm->edgeData, mask->emask);
CustomData_set_only_copy(&dm->faceData, mask->fmask);
/* this wasn't in 2.63 and is disabled for 2.64 because it gives problems with
* weight paint mode when there are modifiers applied, needs further investigation,
* see replies to r50969, Campbell */
#if 0
CustomData_set_only_copy(&dm->loopData, mask->lmask);
Custom(&dm->polyData, mask->pmask);
#endif
}
static void mesh_set_only_copy(Mesh *mesh, const CustomData_MeshMasks *mask)
{
CustomData_set_only_copy(&mesh->vdata, mask->vmask);
CustomData_set_only_copy(&mesh->edata, mask->emask);
CustomData_set_only_copy(&mesh->fdata, mask->fmask);
/* this wasn't in 2.63 and is disabled for 2.64 because it gives problems with
* weight paint mode when there are modifiers applied, needs further investigation,
* see replies to r50969, Campbell */
#if 0
CustomData_set_only_copy(&mesh->ldata, mask->lmask);
CustomData_set_only_copy(&mesh->pdata, mask->pmask);
#endif
}
void *DM_get_vert_data_layer(DerivedMesh *dm, int type)
{
return CustomData_get_layer_for_write(&dm->vertData, type, dm->getNumVerts(dm));
}
void *DM_get_edge_data_layer(DerivedMesh *dm, int type)
{
if (type == CD_MEDGE) {
return dm->getEdgeArray(dm);
}
return CustomData_get_layer_for_write(&dm->edgeData, type, dm->getNumEdges(dm));
}
void *DM_get_poly_data_layer(DerivedMesh *dm, int type)
{
return CustomData_get_layer_for_write(&dm->polyData, type, dm->getNumPolys(dm));
}
void *DM_get_loop_data_layer(DerivedMesh *dm, int type)
{
return CustomData_get_layer_for_write(&dm->loopData, type, dm->getNumLoops(dm));
}
void DM_copy_vert_data(
DerivedMesh *source, DerivedMesh *dest, int source_index, int dest_index, int count)
{
CustomData_copy_data(&source->vertData, &dest->vertData, source_index, dest_index, count);
}
void DM_interp_vert_data(DerivedMesh *source,
DerivedMesh *dest,
int *src_indices,
float *weights,
int count,
int dest_index)
{
CustomData_interp(
&source->vertData, &dest->vertData, src_indices, weights, nullptr, count, dest_index);
}
static float (*get_editbmesh_orco_verts(BMEditMesh *em))[3]
{
BMIter iter;
BMVert *eve;
float(*orco)[3];
int i;
/* these may not really be the orco's, but it's only for preview.
* could be solver better once, but isn't simple */
orco = (float(*)[3])MEM_malloc_arrayN(em->bm->totvert, sizeof(float[3]), "BMEditMesh Orco");
BM_ITER_MESH_INDEX (eve, &iter, em->bm, BM_VERTS_OF_MESH, i) {
copy_v3_v3(orco[i], eve->co);
}
return orco;
}
/* orco custom data layer */
static float (*get_orco_coords(Object *ob, BMEditMesh *em, int layer, int *free))[3]
{
*free = 0;
if (layer == CD_ORCO) {
/* get original coordinates */
*free = 1;
if (em) {
return get_editbmesh_orco_verts(em);
}
return BKE_mesh_orco_verts_get(ob);
}
if (layer == CD_CLOTH_ORCO) {
/* apply shape key for cloth, this should really be solved
* by a more flexible customdata system, but not simple */
if (!em) {
ClothModifierData *clmd = (ClothModifierData *)BKE_modifiers_findby_type(
ob, eModifierType_Cloth);
if (clmd) {
KeyBlock *kb = BKE_keyblock_from_key(BKE_key_from_object(ob),
clmd->sim_parms->shapekey_rest);
if (kb && kb->data) {
return (float(*)[3])kb->data;
}
}
}
return nullptr;
}
return nullptr;
}
static Mesh *create_orco_mesh(Object *ob, Mesh *me, BMEditMesh *em, int layer)
{
Mesh *mesh;
float(*orco)[3];
int free;
if (em) {
mesh = BKE_mesh_from_bmesh_for_eval_nomain(em->bm, nullptr, me);
BKE_mesh_ensure_default_orig_index_customdata(mesh);
}
else {
mesh = BKE_mesh_copy_for_eval(me, true);
}
orco = get_orco_coords(ob, em, layer, &free);
if (orco) {
BKE_mesh_vert_coords_apply(mesh, orco);
if (free) {
MEM_freeN(orco);
}
}
return mesh;
}
static void add_orco_mesh(Object *ob, BMEditMesh *em, Mesh *mesh, Mesh *mesh_orco, int layer)
{
float(*orco)[3], (*layerorco)[3];
int totvert, free;
totvert = mesh->totvert;
if (mesh_orco) {
free = 1;
if (mesh_orco->totvert == totvert) {
orco = BKE_mesh_vert_coords_alloc(mesh_orco, nullptr);
}
else {
orco = BKE_mesh_vert_coords_alloc(mesh, nullptr);
}
}
else {
/* TODO(sybren): totvert should potentially change here, as ob->data
* or em may have a different number of vertices than dm. */
orco = get_orco_coords(ob, em, layer, &free);
}
if (orco) {
if (layer == CD_ORCO) {
BKE_mesh_orco_verts_transform((Mesh *)ob->data, orco, totvert, 0);
}
layerorco = (float(*)[3])CustomData_get_layer_for_write(&mesh->vdata, layer, mesh->totvert);
if (!layerorco) {
layerorco = (float(*)[3])CustomData_add_layer(
&mesh->vdata, layer, CD_SET_DEFAULT, nullptr, mesh->totvert);
}
memcpy(layerorco, orco, sizeof(float[3]) * totvert);
if (free) {
MEM_freeN(orco);
}
}
}
static bool mesh_has_modifier_final_normals(const Mesh *mesh_input,
const CustomData_MeshMasks *final_datamask,
Mesh *mesh_final)
{
/* Test if mesh has the required loop normals, in case an additional modifier
* evaluation from another instance or from an operator requests it but the
* initial normals were not loop normals. */
const bool calc_loop_normals = ((mesh_input->flag & ME_AUTOSMOOTH) != 0 ||
(final_datamask->lmask & CD_MASK_NORMAL) != 0);
return (!calc_loop_normals || CustomData_has_layer(&mesh_final->ldata, CD_NORMAL));
}
static void mesh_calc_modifier_final_normals(const Mesh *mesh_input,
const CustomData_MeshMasks *final_datamask,
const bool sculpt_dyntopo,
Mesh *mesh_final)
{
/* Compute normals. */
const bool calc_loop_normals = ((mesh_input->flag & ME_AUTOSMOOTH) != 0 ||
(final_datamask->lmask & CD_MASK_NORMAL) != 0);
/* Needed as `final_datamask` is not preserved outside modifier stack evaluation. */
SubsurfRuntimeData *subsurf_runtime_data = mesh_final->runtime->subsurf_runtime_data;
if (subsurf_runtime_data) {
subsurf_runtime_data->calc_loop_normals = calc_loop_normals;
}
if (calc_loop_normals) {
/* Compute loop normals (NOTE: will compute poly and vert normals as well, if needed!). In case
* of deferred CPU subdivision, this will be computed when the wrapper is generated. */
if (!subsurf_runtime_data || subsurf_runtime_data->resolution == 0) {
BKE_mesh_calc_normals_split(mesh_final);
}
}
else {
if (sculpt_dyntopo == false) {
/* without this, drawing ngon tri's faces will show ugly tessellated face
* normals and will also have to calculate normals on the fly, try avoid
* this where possible since calculating polygon normals isn't fast,
* note that this isn't a problem for subsurf (only quads) or edit-mode
* which deals with drawing differently. */
BKE_mesh_ensure_normals_for_display(mesh_final);
}
/* Some modifiers, like data-transfer, may generate those data as temp layer,
* we do not want to keep them, as they are used by display code when available
* (i.e. even if auto-smooth is disabled). */
if (CustomData_has_layer(&mesh_final->ldata, CD_NORMAL)) {
CustomData_free_layers(&mesh_final->ldata, CD_NORMAL, mesh_final->totloop);
}
}
}
/* Does final touches to the final evaluated mesh, making sure it is perfectly usable.
*
* This is needed because certain information is not passed along intermediate meshes allocated
* during stack evaluation.
*/
static void mesh_calc_finalize(const Mesh *mesh_input, Mesh *mesh_eval)
{
/* Make sure the name is the same. This is because mesh allocation from template does not
* take care of naming. */
BLI_strncpy(mesh_eval->id.name, mesh_input->id.name, sizeof(mesh_eval->id.name));
/* Make evaluated mesh to share same edit mesh pointer as original and copied meshes. */
mesh_eval->edit_mesh = mesh_input->edit_mesh;
}
void BKE_mesh_wrapper_deferred_finalize_mdata(Mesh *me_eval,
const CustomData_MeshMasks *cd_mask_finalize)
{
if (me_eval->runtime->wrapper_type_finalize & (1 << ME_WRAPPER_TYPE_BMESH)) {
editbmesh_calc_modifier_final_normals(me_eval, cd_mask_finalize);
me_eval->runtime->wrapper_type_finalize = eMeshWrapperType(
me_eval->runtime->wrapper_type_finalize & ~(1 << ME_WRAPPER_TYPE_BMESH));
}
BLI_assert(me_eval->runtime->wrapper_type_finalize == 0);
}
/**
* Modifies the given mesh and geometry set. The mesh is not passed as part of the mesh component
* in the \a geometry_set input, it is only passed in \a input_mesh and returned in the return
* value.
*
* The purpose of the geometry set is to store all geometry components that are generated
* by modifiers to allow outputting non-mesh data from modifiers.
*/
static Mesh *modifier_modify_mesh_and_geometry_set(ModifierData *md,
const ModifierEvalContext &mectx,
Mesh *input_mesh,
GeometrySet &geometry_set)
{
Mesh *mesh_output = nullptr;
const ModifierTypeInfo *mti = BKE_modifier_get_info((ModifierType)md->type);
if (mti->modifyGeometrySet == nullptr) {
mesh_output = BKE_modifier_modify_mesh(md, &mectx, input_mesh);
}
else {
/* For performance reasons, this should be called by the modifier and/or nodes themselves at
* some point. */
BKE_mesh_wrapper_ensure_mdata(input_mesh);
/* Adds a new mesh component to the geometry set based on the #input_mesh. */
MeshComponent &mesh_component = geometry_set.get_component_for_write<MeshComponent>();
/* Replace only the mesh rather than the whole component, because the entire #MeshComponent
* might have been replaced by data from a different object in the node tree, which means the
* component contains vertex group name data for that object that should not be removed. */
mesh_component.replace(input_mesh, GeometryOwnershipType::Editable);
/* Let the modifier change the geometry set. */
mti->modifyGeometrySet(md, &mectx, &geometry_set);
/* Release the mesh from the geometry set again. */
if (geometry_set.has<MeshComponent>()) {
MeshComponent &mesh_component = geometry_set.get_component_for_write<MeshComponent>();
if (mesh_component.get_for_read() != input_mesh) {
/* Make sure the mesh component actually owns the mesh before taking over ownership. */
mesh_component.ensure_owns_direct_data();
}
mesh_output = mesh_component.release();
}
/* Return an empty mesh instead of null. */
if (mesh_output == nullptr) {
mesh_output = BKE_mesh_new_nomain(0, 0, 0, 0, 0);
BKE_mesh_copy_parameters_for_eval(mesh_output, input_mesh);
}
}
return mesh_output;
}
static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const bool use_deform,
const bool need_mapping,
const CustomData_MeshMasks *dataMask,
const bool use_cache,
const bool allow_shared_mesh,
/* return args */
Mesh **r_deform,
Mesh **r_final,
GeometrySet **r_geometry_set)
{
using namespace blender::bke;
/* Input mesh shouldn't be modified. */
Mesh *mesh_input = (Mesh *)ob->data;
/* The final mesh is the result of calculating all enabled modifiers. */
Mesh *mesh_final = nullptr;
/* The result of calculating all leading deform modifiers. */
Mesh *mesh_deform = nullptr;
/* This geometry set contains the non-mesh data that might be generated by modifiers. */
GeometrySet geometry_set_final;
BLI_assert((mesh_input->id.tag & LIB_TAG_COPIED_ON_WRITE_EVAL_RESULT) == 0);
/* Mesh with constructive modifiers but no deformation applied. Tracked
* along with final mesh if undeformed / orco coordinates are requested
* for texturing. */
Mesh *mesh_orco = nullptr;
Mesh *mesh_orco_cloth = nullptr;
/* Modifier evaluation modes. */
const bool use_render = (DEG_get_mode(depsgraph) == DAG_EVAL_RENDER);
const int required_mode = use_render ? eModifierMode_Render : eModifierMode_Realtime;
/* Sculpt can skip certain modifiers. */
const bool has_multires = BKE_sculpt_multires_active(scene, ob) != nullptr;
bool multires_applied = false;
const bool sculpt_mode = ob->mode & OB_MODE_SCULPT && ob->sculpt && !use_render;
const bool sculpt_dyntopo = (sculpt_mode && ob->sculpt->bm) && !use_render;
/* Modifier evaluation contexts for different types of modifiers. */
ModifierApplyFlag apply_render = use_render ? MOD_APPLY_RENDER : (ModifierApplyFlag)0;
ModifierApplyFlag apply_cache = use_cache ? MOD_APPLY_USECACHE : (ModifierApplyFlag)0;
const ModifierEvalContext mectx = {
depsgraph, ob, (ModifierApplyFlag)(apply_render | apply_cache)};
const ModifierEvalContext mectx_orco = {
depsgraph, ob, (ModifierApplyFlag)(apply_render | MOD_APPLY_ORCO)};
/* Get effective list of modifiers to execute. Some effects like shape keys
* are added as virtual modifiers before the user created modifiers. */
VirtualModifierData virtualModifierData;
ModifierData *firstmd = BKE_modifiers_get_virtual_modifierlist(ob, &virtualModifierData);
ModifierData *md = firstmd;
/* Preview colors by modifiers such as dynamic paint, to show the results
* even if the resulting data is not used in a material. Only in object mode.
* TODO: this is broken, not drawn by the drawn manager. */
const bool do_mod_mcol = (ob->mode == OB_MODE_OBJECT);
ModifierData *previewmd = nullptr;
CustomData_MeshMasks previewmask = {0};
if (do_mod_mcol) {
/* Find the last active modifier generating a preview, or nullptr if none. */
/* XXX Currently, DPaint modifier just ignores this.
* Needs a stupid hack...
* The whole "modifier preview" thing has to be (re?)designed, anyway! */
previewmd = BKE_modifier_get_last_preview(scene, md, required_mode);
}
/* Compute accumulated datamasks needed by each modifier. It helps to do
* this fine grained so that for example vertex groups are preserved up to
* an armature modifier, but not through a following subsurf modifier where
* subdividing them is expensive. */
CustomData_MeshMasks final_datamask = *dataMask;
CDMaskLink *datamasks = BKE_modifier_calc_data_masks(
scene, md, &final_datamask, required_mode, previewmd, &previewmask);
CDMaskLink *md_datamask = datamasks;
/* XXX Always copying POLYINDEX, else tessellated data are no more valid! */
CustomData_MeshMasks append_mask = CD_MASK_BAREMESH_ORIGINDEX;
/* Clear errors before evaluation. */
BKE_modifiers_clear_errors(ob);
if (ob->modifier_flag & OB_MODIFIER_FLAG_ADD_REST_POSITION) {
if (mesh_final == nullptr) {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
ASSERT_IS_VALID_MESH(mesh_final);
}
MutableAttributeAccessor attributes = mesh_final->attributes_for_write();
SpanAttributeWriter<float3> rest_positions =
attributes.lookup_or_add_for_write_only_span<float3>("rest_position", ATTR_DOMAIN_POINT);
if (rest_positions && attributes.domain_size(ATTR_DOMAIN_POINT) > 0) {
attributes.lookup<float3>("position").materialize(rest_positions.span);
rest_positions.finish();
}
}
/* Apply all leading deform modifiers. */
if (use_deform) {
for (; md; md = md->next, md_datamask = md_datamask->next) {
const ModifierTypeInfo *mti = BKE_modifier_get_info((ModifierType)md->type);
if (!BKE_modifier_is_enabled(scene, md, required_mode)) {
continue;
}
if (mti->type == eModifierTypeType_OnlyDeform && !sculpt_dyntopo) {
blender::bke::ScopedModifierTimer modifier_timer{*md};
if (!mesh_final) {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
ASSERT_IS_VALID_MESH(mesh_final);
}
BKE_modifier_deform_verts(md,
&mectx,
mesh_final,
BKE_mesh_vert_positions_for_write(mesh_final),
mesh_final->totvert);
}
else {
break;
}
}
/* Result of all leading deforming modifiers is cached for
* places that wish to use the original mesh but with deformed
* coordinates (like vertex paint). */
if (r_deform) {
mesh_deform = BKE_mesh_copy_for_eval(mesh_input, true);
}
}
/* Apply all remaining constructive and deforming modifiers. */
bool have_non_onlydeform_modifiers_appled = false;
for (; md; md = md->next, md_datamask = md_datamask->next) {
const ModifierTypeInfo *mti = BKE_modifier_get_info((ModifierType)md->type);
if (!BKE_modifier_is_enabled(scene, md, required_mode)) {
continue;
}
if (mti->type == eModifierTypeType_OnlyDeform && !use_deform) {
continue;
}
if ((mti->flags & eModifierTypeFlag_RequiresOriginalData) &&
have_non_onlydeform_modifiers_appled) {
BKE_modifier_set_error(ob, md, "Modifier requires original data, bad stack position");
continue;
}
if (sculpt_mode && (!has_multires || multires_applied || sculpt_dyntopo)) {
bool unsupported = false;
if (md->type == eModifierType_Multires && ((MultiresModifierData *)md)->sculptlvl == 0) {
/* If multires is on level 0 skip it silently without warning message. */
if (!sculpt_dyntopo) {
continue;
}
}
if (sculpt_dyntopo) {
unsupported = true;
}
if (scene->toolsettings->sculpt->flags & SCULPT_ONLY_DEFORM) {
unsupported |= (mti->type != eModifierTypeType_OnlyDeform);
}
unsupported |= multires_applied;
if (unsupported) {
if (sculpt_dyntopo) {
BKE_modifier_set_error(ob, md, "Not supported in dyntopo");
}
else {
BKE_modifier_set_error(ob, md, "Not supported in sculpt mode");
}
continue;
}
}
if (need_mapping && !BKE_modifier_supports_mapping(md)) {
continue;
}
blender::bke::ScopedModifierTimer modifier_timer{*md};
/* Add orco mesh as layer if needed by this modifier. */
if (mesh_final && mesh_orco && mti->requiredDataMask) {
CustomData_MeshMasks mask = {0};
mti->requiredDataMask(md, &mask);
if (mask.vmask & CD_MASK_ORCO) {
add_orco_mesh(ob, nullptr, mesh_final, mesh_orco, CD_ORCO);
}
}
if (mti->type == eModifierTypeType_OnlyDeform) {
if (!mesh_final) {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
ASSERT_IS_VALID_MESH(mesh_final);
}
BKE_modifier_deform_verts(md,
&mectx,
mesh_final,
BKE_mesh_vert_positions_for_write(mesh_final),
mesh_final->totvert);
}
else {
bool check_for_needs_mapping = false;
if (mesh_final != nullptr) {
if (have_non_onlydeform_modifiers_appled == false) {
/* If we only deformed, we won't have initialized #CD_ORIGINDEX.
* as this is the only part of the function that initializes mapping. */
check_for_needs_mapping = true;
}
}
else {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
ASSERT_IS_VALID_MESH(mesh_final);
check_for_needs_mapping = true;
}
have_non_onlydeform_modifiers_appled = true;
/* determine which data layers are needed by following modifiers */
CustomData_MeshMasks nextmask = md_datamask->next ? md_datamask->next->mask : final_datamask;
if (check_for_needs_mapping) {
/* Initialize original indices the first time we evaluate a
* constructive modifier. Modifiers will then do mapping mostly
* automatic by copying them through CustomData_copy_data along
* with other data.
*
* These are created when either requested by evaluation, or if
* following modifiers requested them. */
if (need_mapping ||
((nextmask.vmask | nextmask.emask | nextmask.pmask) & CD_MASK_ORIGINDEX)) {
/* calc */
CustomData_add_layer(
&mesh_final->vdata, CD_ORIGINDEX, CD_CONSTRUCT, nullptr, mesh_final->totvert);
CustomData_add_layer(
&mesh_final->edata, CD_ORIGINDEX, CD_CONSTRUCT, nullptr, mesh_final->totedge);
CustomData_add_layer(
&mesh_final->pdata, CD_ORIGINDEX, CD_CONSTRUCT, nullptr, mesh_final->totpoly);
/* Not worth parallelizing this,
* gives less than 0.1% overall speedup in best of best cases... */
range_vn_i((int *)CustomData_get_layer_for_write(
&mesh_final->vdata, CD_ORIGINDEX, mesh_final->totvert),
mesh_final->totvert,
0);
range_vn_i((int *)CustomData_get_layer_for_write(
&mesh_final->edata, CD_ORIGINDEX, mesh_final->totedge),
mesh_final->totedge,
0);
range_vn_i((int *)CustomData_get_layer_for_write(
&mesh_final->pdata, CD_ORIGINDEX, mesh_final->totpoly),
mesh_final->totpoly,
0);
}
}
/* set the Mesh to only copy needed data */
CustomData_MeshMasks mask = md_datamask->mask;
/* needMapping check here fixes bug T28112, otherwise it's
* possible that it won't be copied */
CustomData_MeshMasks_update(&mask, &append_mask);
if (need_mapping) {
mask.vmask |= CD_MASK_ORIGINDEX;
mask.emask |= CD_MASK_ORIGINDEX;
mask.pmask |= CD_MASK_ORIGINDEX;
}
mesh_set_only_copy(mesh_final, &mask);
/* add cloth rest shape key if needed */
if (mask.vmask & CD_MASK_CLOTH_ORCO) {
add_orco_mesh(ob, nullptr, mesh_final, mesh_orco, CD_CLOTH_ORCO);
}
/* add an origspace layer if needed */
if ((md_datamask->mask.lmask) & CD_MASK_ORIGSPACE_MLOOP) {
if (!CustomData_has_layer(&mesh_final->ldata, CD_ORIGSPACE_MLOOP)) {
CustomData_add_layer(&mesh_final->ldata,
CD_ORIGSPACE_MLOOP,
CD_SET_DEFAULT,
nullptr,
mesh_final->totloop);
mesh_init_origspace(mesh_final);
}
}
Mesh *mesh_next = modifier_modify_mesh_and_geometry_set(
md, mectx, mesh_final, geometry_set_final);
ASSERT_IS_VALID_MESH(mesh_next);
if (mesh_next) {
/* if the modifier returned a new mesh, release the old one */
if (mesh_final != mesh_next) {
BLI_assert(mesh_final != mesh_input);
BKE_id_free(nullptr, mesh_final);
}
mesh_final = mesh_next;
}
/* create an orco mesh in parallel */
if (nextmask.vmask & CD_MASK_ORCO) {
if (!mesh_orco) {
mesh_orco = create_orco_mesh(ob, mesh_input, nullptr, CD_ORCO);
}
nextmask.vmask &= ~CD_MASK_ORCO;
CustomData_MeshMasks temp_cddata_masks = {0};
temp_cddata_masks.vmask = CD_MASK_ORIGINDEX;
temp_cddata_masks.emask = CD_MASK_ORIGINDEX;
temp_cddata_masks.fmask = CD_MASK_ORIGINDEX;
temp_cddata_masks.pmask = CD_MASK_ORIGINDEX;
if (mti->requiredDataMask != nullptr) {
mti->requiredDataMask(md, &temp_cddata_masks);
}
CustomData_MeshMasks_update(&temp_cddata_masks, &nextmask);
mesh_set_only_copy(mesh_orco, &temp_cddata_masks);
mesh_next = BKE_modifier_modify_mesh(md, &mectx_orco, mesh_orco);
ASSERT_IS_VALID_MESH(mesh_next);
if (mesh_next) {
/* if the modifier returned a new mesh, release the old one */
if (mesh_orco != mesh_next) {
BLI_assert(mesh_orco != mesh_input);
BKE_id_free(nullptr, mesh_orco);
}
mesh_orco = mesh_next;
}
}
/* create cloth orco mesh in parallel */
if (nextmask.vmask & CD_MASK_CLOTH_ORCO) {
if (!mesh_orco_cloth) {
mesh_orco_cloth = create_orco_mesh(ob, mesh_input, nullptr, CD_CLOTH_ORCO);
}
nextmask.vmask &= ~CD_MASK_CLOTH_ORCO;
nextmask.vmask |= CD_MASK_ORIGINDEX;
nextmask.emask |= CD_MASK_ORIGINDEX;
nextmask.pmask |= CD_MASK_ORIGINDEX;
mesh_set_only_copy(mesh_orco_cloth, &nextmask);
mesh_next = BKE_modifier_modify_mesh(md, &mectx_orco, mesh_orco_cloth);
ASSERT_IS_VALID_MESH(mesh_next);
if (mesh_next) {
/* if the modifier returned a new mesh, release the old one */
if (mesh_orco_cloth != mesh_next) {
BLI_assert(mesh_orco != mesh_input);
BKE_id_free(nullptr, mesh_orco_cloth);
}
mesh_orco_cloth = mesh_next;
}
}
/* in case of dynamic paint, make sure preview mask remains for following modifiers */
/* XXX Temp and hackish solution! */
if (md->type == eModifierType_DynamicPaint) {
append_mask.lmask |= CD_MASK_PREVIEW_MLOOPCOL;
}
mesh_final->runtime->deformed_only = false;
}
if (sculpt_mode && md->type == eModifierType_Multires) {
multires_applied = true;
}
}
BLI_linklist_free((LinkNode *)datamasks, nullptr);
for (md = firstmd; md; md = md->next) {
BKE_modifier_free_temporary_data(md);
}
if (mesh_final == nullptr) {
if (allow_shared_mesh) {
mesh_final = mesh_input;
}
else {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
}
}
/* Denotes whether the object which the modifier stack came from owns the mesh or whether the
* mesh is shared across multiple objects since there are no effective modifiers. */
const bool is_own_mesh = (mesh_final != mesh_input);
/* Add orco coordinates to final and deformed mesh if requested. */
if (final_datamask.vmask & CD_MASK_ORCO) {
/* No need in ORCO layer if the mesh was not deformed or modified: undeformed mesh in this case
* matches input mesh. */
if (is_own_mesh) {
add_orco_mesh(ob, nullptr, mesh_final, mesh_orco, CD_ORCO);
}
if (mesh_deform) {
add_orco_mesh(ob, nullptr, mesh_deform, nullptr, CD_ORCO);
}
}
if (mesh_orco) {
BKE_id_free(nullptr, mesh_orco);
}
if (mesh_orco_cloth) {
BKE_id_free(nullptr, mesh_orco_cloth);
}
/* Remove temporary data layer only needed for modifier evaluation.
* Save some memory, and ensure GPU subdivision does not need to deal with this. */
CustomData_free_layers(&mesh_final->vdata, CD_CLOTH_ORCO, mesh_final->totvert);
/* Compute normals. */
if (is_own_mesh) {
mesh_calc_modifier_final_normals(mesh_input, &final_datamask, sculpt_dyntopo, mesh_final);
mesh_calc_finalize(mesh_input, mesh_final);
}
else {
blender::bke::MeshRuntime *runtime = mesh_input->runtime;
if (runtime->mesh_eval == nullptr) {
std::lock_guard lock{mesh_input->runtime->eval_mutex};
if (runtime->mesh_eval == nullptr) {
/* Not yet finalized by any instance, do it now
* Isolate since computing normals is multithreaded and we are holding a lock. */
blender::threading::isolate_task([&] {
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
mesh_calc_modifier_final_normals(
mesh_input, &final_datamask, sculpt_dyntopo, mesh_final);
mesh_calc_finalize(mesh_input, mesh_final);
runtime->mesh_eval = mesh_final;
});
}
else {
/* Already finalized by another instance, reuse. */
mesh_final = runtime->mesh_eval;
}
}
else if (!mesh_has_modifier_final_normals(mesh_input, &final_datamask, runtime->mesh_eval)) {
/* Modifier stack was (re-)evaluated with a request for additional normals
* different than the instanced mesh, can't instance anymore now. */
mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
mesh_calc_modifier_final_normals(mesh_input, &final_datamask, sculpt_dyntopo, mesh_final);
mesh_calc_finalize(mesh_input, mesh_final);
}
else {
/* Already finalized by another instance, reuse. */
mesh_final = runtime->mesh_eval;
}
}
/* Return final mesh */
*r_final = mesh_final;
if (r_deform) {
*r_deform = mesh_deform;
}
if (r_geometry_set) {
*r_geometry_set = new GeometrySet(std::move(geometry_set_final));
}
}
float (*editbmesh_vert_coords_alloc(BMEditMesh *em, int *r_vert_len))[3]
{
BMIter iter;
BMVert *eve;
float(*cos)[3];
int i;
*r_vert_len = em->bm->totvert;
cos = (float(*)[3])MEM_malloc_arrayN(em->bm->totvert, sizeof(float[3]), "vertexcos");
BM_ITER_MESH_INDEX (eve, &iter, em->bm, BM_VERTS_OF_MESH, i) {
copy_v3_v3(cos[i], eve->co);
}
return cos;
}
bool editbmesh_modifier_is_enabled(const Scene *scene,
const Object *ob,
ModifierData *md,
bool has_prev_mesh)
{
const ModifierTypeInfo *mti = BKE_modifier_get_info((ModifierType)md->type);
const int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
if (!BKE_modifier_is_enabled(scene, md, required_mode)) {
return false;
}
if ((mti->flags & eModifierTypeFlag_RequiresOriginalData) && has_prev_mesh) {
BKE_modifier_set_error(ob, md, "Modifier requires original data, bad stack position");
return false;
}
return true;
}
static void editbmesh_calc_modifier_final_normals(Mesh *mesh_final,
const CustomData_MeshMasks *final_datamask)
{
const bool calc_loop_normals = ((mesh_final->flag & ME_AUTOSMOOTH) != 0 ||
(final_datamask->lmask & CD_MASK_NORMAL) != 0);
SubsurfRuntimeData *subsurf_runtime_data = mesh_final->runtime->subsurf_runtime_data;
if (subsurf_runtime_data) {
subsurf_runtime_data->calc_loop_normals = calc_loop_normals;
}
if (calc_loop_normals) {
/* Compute loop normals. In case of deferred CPU subdivision, this will be computed when the
* wrapper is generated. */
if (!subsurf_runtime_data || subsurf_runtime_data->resolution == 0) {
BKE_mesh_calc_normals_split(mesh_final);
}
}
else {
/* Same as #mesh_calc_modifiers.
* If using loop normals, poly normals have already been computed. */
BKE_mesh_ensure_normals_for_display(mesh_final);
/* Some modifiers, like data-transfer, may generate those data, we do not want to keep them,
* as they are used by display code when available (i.e. even if auto-smooth is disabled). */
if (CustomData_has_layer(&mesh_final->ldata, CD_NORMAL)) {
CustomData_free_layers(&mesh_final->ldata, CD_NORMAL, mesh_final->totloop);
}
}
}
static void editbmesh_calc_modifier_final_normals_or_defer(
Mesh *mesh_final, const CustomData_MeshMasks *final_datamask)
{
if (mesh_final->runtime->wrapper_type != ME_WRAPPER_TYPE_MDATA) {
/* Generated at draw time. */
mesh_final->runtime->wrapper_type_finalize = eMeshWrapperType(
1 << mesh_final->runtime->wrapper_type);
return;
}
editbmesh_calc_modifier_final_normals(mesh_final, final_datamask);
}
static void editbmesh_calc_modifiers(struct Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
BMEditMesh *em_input,
const CustomData_MeshMasks *dataMask,
/* return args */
Mesh **r_cage,
Mesh **r_final,
GeometrySet **r_geometry_set)
{
/* Input and final mesh. Final mesh is only created the moment the first
* constructive modifier is executed, or a deform modifier needs normals
* or certain data layers. */
Mesh *mesh_input = (Mesh *)ob->data;
Mesh *mesh_final = nullptr;
Mesh *mesh_cage = nullptr;
/* This geometry set contains the non-mesh data that might be generated by modifiers. */
GeometrySet geometry_set_final;
/* TODO: Remove use of `deformed_verts` in mesh modifier stack
* since mesh positions are now stored in a contiguous array. */
float(*deformed_verts)[3] = nullptr;
int num_deformed_verts = 0;
bool isPrevDeform = false;
/* Mesh with constructive modifiers but no deformation applied. Tracked
* along with final mesh if undeformed / orco coordinates are requested
* for texturing. */
Mesh *mesh_orco = nullptr;
/* Modifier evaluation modes. */
const int required_mode = eModifierMode_Realtime | eModifierMode_Editmode;
const bool use_render = (DEG_get_mode(depsgraph) == DAG_EVAL_RENDER);
/* Modifier evaluation contexts for different types of modifiers. */
ModifierApplyFlag apply_render = use_render ? MOD_APPLY_RENDER : (ModifierApplyFlag)0;
const ModifierEvalContext mectx = {
depsgraph, ob, (ModifierApplyFlag)(MOD_APPLY_USECACHE | apply_render)};
const ModifierEvalContext mectx_orco = {depsgraph, ob, MOD_APPLY_ORCO};
/* Get effective list of modifiers to execute. Some effects like shape keys
* are added as virtual modifiers before the user created modifiers. */
VirtualModifierData virtualModifierData;
ModifierData *md = BKE_modifiers_get_virtual_modifierlist(ob, &virtualModifierData);
/* Compute accumulated datamasks needed by each modifier. It helps to do
* this fine grained so that for example vertex groups are preserved up to
* an armature modifier, but not through a following subsurf modifier where
* subdividing them is expensive. */
CustomData_MeshMasks final_datamask = *dataMask;
CDMaskLink *datamasks = BKE_modifier_calc_data_masks(
scene, md, &final_datamask, required_mode, nullptr, nullptr);
CDMaskLink *md_datamask = datamasks;
CustomData_MeshMasks append_mask = CD_MASK_BAREMESH;
/* Evaluate modifiers up to certain index to get the mesh cage. */
int cageIndex = BKE_modifiers_get_cage_index(scene, ob, nullptr, true);
if (r_cage && cageIndex == -1) {
mesh_cage = BKE_mesh_wrapper_from_editmesh_with_coords(
em_input, &final_datamask, nullptr, mesh_input);
}
/* The mesh from edit mode should not have any original index layers already, since those
* are added during evaluation when necessary and are redundant on an original mesh. */
BLI_assert(CustomData_get_layer(&em_input->bm->pdata, CD_ORIGINDEX) == nullptr &&
CustomData_get_layer(&em_input->bm->edata, CD_ORIGINDEX) == nullptr &&
CustomData_get_layer(&em_input->bm->pdata, CD_ORIGINDEX) == nullptr);
/* Clear errors before evaluation. */
BKE_modifiers_clear_errors(ob);
for (int i = 0; md; i++, md = md->next, md_datamask = md_datamask->next) {
const ModifierTypeInfo *mti = BKE_modifier_get_info((ModifierType)md->type);
if (!editbmesh_modifier_is_enabled(scene, ob, md, mesh_final != nullptr)) {
continue;
}
blender::bke::ScopedModifierTimer modifier_timer{*md};
/* Add an orco mesh as layer if needed by this modifier. */
if (mesh_final && mesh_orco && mti->requiredDataMask) {
CustomData_MeshMasks mask = {0};
mti->requiredDataMask(md, &mask);
if (mask.vmask & CD_MASK_ORCO) {
add_orco_mesh(ob, em_input, mesh_final, mesh_orco, CD_ORCO);
}
}
/* How to apply modifier depends on (a) what we already have as
* a result of previous modifiers (could be a mesh or just
* deformed vertices) and (b) what type the modifier is. */
if (mti->type == eModifierTypeType_OnlyDeform) {
/* No existing verts to deform, need to build them. */
if (!deformed_verts) {
if (mesh_final) {
/* Deforming a derived mesh, read the vertex locations
* out of the mesh and deform them. Once done with this
* run of deformers verts will be written back. */
deformed_verts = BKE_mesh_vert_coords_alloc(mesh_final, &num_deformed_verts);
}
else {
deformed_verts = editbmesh_vert_coords_alloc(em_input, &num_deformed_verts);
}
}
else if (isPrevDeform && mti->dependsOnNormals && mti->dependsOnNormals(md)) {
if (mesh_final == nullptr) {
mesh_final = BKE_mesh_from_bmesh_for_eval_nomain(em_input->bm, nullptr, mesh_input);
BKE_mesh_ensure_default_orig_index_customdata(mesh_final);
ASSERT_IS_VALID_MESH(mesh_final);
}
BLI_assert(deformed_verts != nullptr);
BKE_mesh_vert_coords_apply(mesh_final, deformed_verts);
}
if (mti->deformVertsEM) {
BKE_modifier_deform_vertsEM(
md, &mectx, em_input, mesh_final, deformed_verts, num_deformed_verts);
}
else {
BKE_modifier_deform_verts(md, &mectx, mesh_final, deformed_verts, num_deformed_verts);
}
}
else {
/* apply vertex coordinates or build a DerivedMesh as necessary */
if (mesh_final) {
if (deformed_verts) {
Mesh *mesh_tmp = BKE_mesh_copy_for_eval(mesh_final, false);
if (mesh_final != mesh_cage) {
BKE_id_free(nullptr, mesh_final);
}
mesh_final = mesh_tmp;
BKE_mesh_vert_coords_apply(mesh_final, deformed_verts);
}
else if (mesh_final == mesh_cage) {
/* 'me' may be changed by this modifier, so we need to copy it. */
mesh_final = BKE_mesh_copy_for_eval(mesh_final, false);
}
}
else {
mesh_final = BKE_mesh_wrapper_from_editmesh_with_coords(
em_input, nullptr, deformed_verts, mesh_input);
deformed_verts = nullptr;
}
/* create an orco derivedmesh in parallel */
CustomData_MeshMasks mask = md_datamask->mask;
if (mask.vmask & CD_MASK_ORCO) {
if (!mesh_orco) {
mesh_orco = create_orco_mesh(ob, mesh_input, em_input, CD_ORCO);
}
mask.vmask &= ~CD_MASK_ORCO;
mask.vmask |= CD_MASK_ORIGINDEX;
mask.emask |= CD_MASK_ORIGINDEX;
mask.pmask |= CD_MASK_ORIGINDEX;
mesh_set_only_copy(mesh_orco, &mask);
Mesh *mesh_next = BKE_modifier_modify_mesh(md, &mectx_orco, mesh_orco);
ASSERT_IS_VALID_MESH(mesh_next);
if (mesh_next) {
/* if the modifier returned a new dm, release the old one */
if (mesh_orco && mesh_orco != mesh_next) {
BKE_id_free(nullptr, mesh_orco);
}
mesh_orco = mesh_next;
}
}
/* set the DerivedMesh to only copy needed data */
CustomData_MeshMasks_update(&mask, &append_mask);
/* XXX WHAT? overwrites mask ??? */
/* CD_MASK_ORCO may have been cleared above */
mask = md_datamask->mask;
mask.vmask |= CD_MASK_ORIGINDEX;
mask.emask |= CD_MASK_ORIGINDEX;
mask.pmask |= CD_MASK_ORIGINDEX;
mesh_set_only_copy(mesh_final, &mask);
if (mask.lmask & CD_MASK_ORIGSPACE_MLOOP) {
if (!CustomData_has_layer(&mesh_final->ldata, CD_ORIGSPACE_MLOOP)) {
CustomData_add_layer(&mesh_final->ldata,
CD_ORIGSPACE_MLOOP,
CD_SET_DEFAULT,
nullptr,
mesh_final->totloop);
mesh_init_origspace(mesh_final);
}
}
Mesh *mesh_next = modifier_modify_mesh_and_geometry_set(
md, mectx, mesh_final, geometry_set_final);
ASSERT_IS_VALID_MESH(mesh_next);
if (mesh_next) {
if (mesh_final && mesh_final != mesh_next) {
BKE_id_free(nullptr, mesh_final);
}
mesh_final = mesh_next;
if (deformed_verts) {
MEM_freeN(deformed_verts);
deformed_verts = nullptr;
}
}
mesh_final->runtime->deformed_only = false;
}
if (r_cage && i == cageIndex) {
if (mesh_final && deformed_verts) {
mesh_cage = BKE_mesh_copy_for_eval(mesh_final, false);
BKE_mesh_vert_coords_apply(mesh_cage, deformed_verts);
}
else if (mesh_final) {
mesh_cage = mesh_final;
}
else {
Mesh *me_orig = mesh_input;
/* Modifying the input mesh is weak, however as there can only be one object in edit mode
* even if multiple are sharing the same mesh this should be thread safe. */
if ((me_orig->id.tag & LIB_TAG_COPIED_ON_WRITE) && (ob->mode & OB_MODE_EDIT)) {
if (!BKE_mesh_runtime_ensure_edit_data(me_orig)) {
BKE_mesh_runtime_reset_edit_data(me_orig);
}
me_orig->runtime->edit_data->vertexCos = (const float(*)[3])MEM_dupallocN(
deformed_verts);
}
mesh_cage = BKE_mesh_wrapper_from_editmesh_with_coords(
em_input,
&final_datamask,
deformed_verts ? (const float(*)[3])MEM_dupallocN(deformed_verts) : nullptr,
mesh_input);
}
}
isPrevDeform = (mti->type == eModifierTypeType_OnlyDeform);
}
BLI_linklist_free((LinkNode *)datamasks, nullptr);
/* Yay, we are done. If we have a DerivedMesh and deformed vertices need
* to apply these back onto the DerivedMesh. If we have no DerivedMesh
* then we need to build one. */
if (mesh_final) {
if (deformed_verts) {
if (mesh_final == mesh_cage) {
mesh_final = BKE_mesh_copy_for_eval(mesh_final, false);
}
BKE_mesh_vert_coords_apply(mesh_final, deformed_verts);
}
}
else if (!deformed_verts && mesh_cage) {
/* cage should already have up to date normals */
mesh_final = mesh_cage;
}
else {
/* this is just a copy of the editmesh, no need to calc normals */
mesh_final = BKE_mesh_wrapper_from_editmesh_with_coords(
em_input, &final_datamask, deformed_verts, mesh_input);
deformed_verts = nullptr;
}
if (deformed_verts) {
MEM_freeN(deformed_verts);
}
/* Add orco coordinates to final and deformed mesh if requested. */
if (final_datamask.vmask & CD_MASK_ORCO) {
/* FIXME(@campbellbarton): avoid the need to convert to mesh data just to add an orco layer. */
BKE_mesh_wrapper_ensure_mdata(mesh_final);
add_orco_mesh(ob, em_input, mesh_final, mesh_orco, CD_ORCO);
}
if (mesh_orco) {
BKE_id_free(nullptr, mesh_orco);
}
/* Compute normals. */
editbmesh_calc_modifier_final_normals_or_defer(mesh_final, &final_datamask);
if (mesh_cage && (mesh_cage != mesh_final)) {
editbmesh_calc_modifier_final_normals_or_defer(mesh_cage, &final_datamask);
}
/* Return final mesh. */
*r_final = mesh_final;
if (r_cage) {
*r_cage = mesh_cage;
}
if (r_geometry_set) {
*r_geometry_set = new GeometrySet(std::move(geometry_set_final));
}
}
static void mesh_build_extra_data(struct Depsgraph *depsgraph, Object *ob, Mesh *mesh_eval)
{
uint32_t eval_flags = DEG_get_eval_flags_for_id(depsgraph, &ob->id);
if (eval_flags & DAG_EVAL_NEED_SHRINKWRAP_BOUNDARY) {
BKE_shrinkwrap_compute_boundary_data(mesh_eval);
}
}
static void mesh_build_data(struct Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask,
const bool need_mapping)
{
#if 0 /* XXX This is already taken care of in #mesh_calc_modifiers... */
if (need_mapping) {
/* Also add the flag so that it is recorded in lastDataMask. */
dataMask->vmask |= CD_MASK_ORIGINDEX;
dataMask->emask |= CD_MASK_ORIGINDEX;
dataMask->pmask |= CD_MASK_ORIGINDEX;
}
#endif
Mesh *mesh_eval = nullptr, *mesh_deform_eval = nullptr;
GeometrySet *geometry_set_eval = nullptr;
mesh_calc_modifiers(depsgraph,
scene,
ob,
true,
need_mapping,
dataMask,
true,
true,
&mesh_deform_eval,
&mesh_eval,
&geometry_set_eval);
/* The modifier stack evaluation is storing result in mesh->runtime.mesh_eval, but this result
* is not guaranteed to be owned by object.
*
* Check ownership now, since later on we can not go to a mesh owned by someone else via
* object's runtime: this could cause access freed data on depsgraph destruction (mesh who owns
* the final result might be freed prior to object). */
Mesh *mesh = (Mesh *)ob->data;
const bool is_mesh_eval_owned = (mesh_eval != mesh->runtime->mesh_eval);
BKE_object_eval_assign_data(ob, &mesh_eval->id, is_mesh_eval_owned);
/* Add the final mesh as a non-owning component to the geometry set. */
MeshComponent &mesh_component = geometry_set_eval->get_component_for_write<MeshComponent>();
mesh_component.replace(mesh_eval, GeometryOwnershipType::Editable);
ob->runtime.geometry_set_eval = geometry_set_eval;
ob->runtime.mesh_deform_eval = mesh_deform_eval;
ob->runtime.last_data_mask = *dataMask;
ob->runtime.last_need_mapping = need_mapping;
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 == nullptr || 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);
}
}
mesh_build_extra_data(depsgraph, ob, mesh_eval);
}
static void editbmesh_build_data(struct Depsgraph *depsgraph,
const Scene *scene,
Object *obedit,
BMEditMesh *em,
CustomData_MeshMasks *dataMask)
{
Mesh *mesh = static_cast<Mesh *>(obedit->data);
Mesh *me_cage;
Mesh *me_final;
GeometrySet *non_mesh_components;
editbmesh_calc_modifiers(
depsgraph, scene, obedit, em, dataMask, &me_cage, &me_final, &non_mesh_components);
/* The modifier stack result is expected to share edit mesh pointer with the input.
* This is similar `mesh_calc_finalize()`. */
BKE_mesh_free_editmesh(me_final);
BKE_mesh_free_editmesh(me_cage);
me_final->edit_mesh = me_cage->edit_mesh = em;
/* Object has edit_mesh but is not in edit mode (object shares mesh datablock with another object
* with is in edit mode).
* Convert edit mesh to mesh until the draw manager can draw mesh wrapper which is not in the
* edit mode. */
if (!(obedit->mode & OB_MODE_EDIT)) {
BKE_mesh_wrapper_ensure_mdata(me_final);
if (me_final != me_cage) {
BKE_mesh_wrapper_ensure_mdata(me_cage);
}
}
const bool is_mesh_eval_owned = (me_final != mesh->runtime->mesh_eval);
BKE_object_eval_assign_data(obedit, &me_final->id, is_mesh_eval_owned);
/* 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 == nullptr || DEG_is_evaluated_id(&mesh->key->id));
me_final->key = mesh->key;
obedit->runtime.editmesh_eval_cage = me_cage;
obedit->runtime.geometry_set_eval = non_mesh_components;
BKE_object_boundbox_calc_from_mesh(obedit, me_final);
obedit->runtime.last_data_mask = *dataMask;
}
static void object_get_datamask(const Depsgraph *depsgraph,
Object *ob,
CustomData_MeshMasks *r_mask,
bool *r_need_mapping)
{
Scene *scene = DEG_get_evaluated_scene(depsgraph);
ViewLayer *view_layer = DEG_get_evaluated_view_layer(depsgraph);
DEG_get_customdata_mask_for_object(depsgraph, ob, r_mask);
if (r_need_mapping) {
*r_need_mapping = false;
}
/* Must never access original objects when dependency graph is not active: it might be already
* freed. */
if (!DEG_is_active(depsgraph)) {
return;
}
BKE_view_layer_synced_ensure(scene, view_layer);
Object *actob = BKE_view_layer_active_object_get(view_layer);
if (actob) {
actob = DEG_get_original_object(actob);
}
if (DEG_get_original_object(ob) == actob) {
bool editing = BKE_paint_select_face_test(actob);
/* weight paint and face select need original indices because of selection buffer drawing */
if (r_need_mapping) {
*r_need_mapping = (editing || (ob->mode & (OB_MODE_WEIGHT_PAINT | OB_MODE_VERTEX_PAINT)));
}
/* check if we need tfaces & mcols due to face select or texture paint */
if ((ob->mode & OB_MODE_TEXTURE_PAINT) || editing) {
r_mask->lmask |= CD_MASK_PROP_FLOAT2 | CD_MASK_PROP_BYTE_COLOR;
r_mask->fmask |= CD_MASK_MTFACE;
}
/* check if we need mcols due to vertex paint or weightpaint */
if (ob->mode & OB_MODE_VERTEX_PAINT) {
r_mask->lmask |= CD_MASK_PROP_BYTE_COLOR;
}
if (ob->mode & OB_MODE_WEIGHT_PAINT) {
r_mask->vmask |= CD_MASK_MDEFORMVERT;
}
if (ob->mode & OB_MODE_EDIT) {
r_mask->vmask |= CD_MASK_MVERT_SKIN;
}
}
}
void makeDerivedMesh(struct Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask)
{
BLI_assert(ob->type == OB_MESH);
/* Evaluated meshes aren't supposed to be created on original instances. If you do,
* they aren't cleaned up properly on mode switch, causing crashes, e.g T58150. */
BLI_assert(ob->id.tag & LIB_TAG_COPIED_ON_WRITE);
BKE_object_free_derived_caches(ob);
if (DEG_is_active(depsgraph)) {
BKE_sculpt_update_object_before_eval(ob);
}
/* NOTE: Access the `edit_mesh` after freeing the derived caches, so that `ob->data` is restored
* to the pre-evaluated state. This is because the evaluated state is not necessarily sharing the
* `edit_mesh` pointer with the input. For example, if the object is first evaluated in the
* object mode, and then user in another scene moves object to edit mode. */
BMEditMesh *em = ((Mesh *)ob->data)->edit_mesh;
bool need_mapping;
CustomData_MeshMasks cddata_masks = *dataMask;
object_get_datamask(depsgraph, ob, &cddata_masks, &need_mapping);
if (em) {
editbmesh_build_data(depsgraph, scene, ob, em, &cddata_masks);
}
else {
mesh_build_data(depsgraph, scene, ob, &cddata_masks, need_mapping);
}
}
/***/
Mesh *mesh_get_eval_final(struct Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask)
{
/* This function isn't thread-safe and can't be used during evaluation. */
BLI_assert(DEG_is_evaluating(depsgraph) == false);
/* Evaluated meshes aren't supposed to be created on original instances. If you do,
* they aren't cleaned up properly on mode switch, causing crashes, e.g T58150. */
BLI_assert(ob->id.tag & LIB_TAG_COPIED_ON_WRITE);
/* if there's no evaluated mesh or the last data mask used doesn't include
* the data we need, rebuild the derived mesh
*/
bool need_mapping;
CustomData_MeshMasks cddata_masks = *dataMask;
object_get_datamask(depsgraph, ob, &cddata_masks, &need_mapping);
Mesh *mesh_eval = BKE_object_get_evaluated_mesh(ob);
if ((mesh_eval == nullptr) ||
!CustomData_MeshMasks_are_matching(&(ob->runtime.last_data_mask), &cddata_masks) ||
(need_mapping && !ob->runtime.last_need_mapping)) {
CustomData_MeshMasks_update(&cddata_masks, &ob->runtime.last_data_mask);
makeDerivedMesh(depsgraph, scene, ob, dataMask);
mesh_eval = BKE_object_get_evaluated_mesh(ob);
}
return mesh_eval;
}
Mesh *mesh_get_eval_deform(struct Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask)
{
BMEditMesh *em = ((Mesh *)ob->data)->edit_mesh;
if (em != nullptr) {
/* There is no such a concept as deformed mesh in edit mode.
* Explicitly disallow this request so that the evaluated result is not modified with evaluated
* result from the wrong mode. */
BLI_assert_msg(0, "Request of derformed mesh of object which is in edit mode");
return nullptr;
}
/* This function isn't thread-safe and can't be used during evaluation. */
BLI_assert(DEG_is_evaluating(depsgraph) == false);
/* Evaluated meshes aren't supposed to be created on original instances. If you do,
* they aren't cleaned up properly on mode switch, causing crashes, e.g T58150. */
BLI_assert(ob->id.tag & LIB_TAG_COPIED_ON_WRITE);
/* if there's no derived mesh or the last data mask used doesn't include
* the data we need, rebuild the derived mesh
*/
bool need_mapping;
CustomData_MeshMasks cddata_masks = *dataMask;
object_get_datamask(depsgraph, ob, &cddata_masks, &need_mapping);
if (!ob->runtime.mesh_deform_eval ||
!CustomData_MeshMasks_are_matching(&(ob->runtime.last_data_mask), &cddata_masks) ||
(need_mapping && !ob->runtime.last_need_mapping)) {
CustomData_MeshMasks_update(&cddata_masks, &ob->runtime.last_data_mask);
mesh_build_data(
depsgraph, scene, ob, &cddata_masks, need_mapping || ob->runtime.last_need_mapping);
}
return ob->runtime.mesh_deform_eval;
}
Mesh *mesh_create_eval_final(Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask)
{
Mesh *result;
mesh_calc_modifiers(
depsgraph, scene, ob, true, false, dataMask, false, false, nullptr, &result, nullptr);
return result;
}
Mesh *mesh_create_eval_no_deform(Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask)
{
Mesh *result;
mesh_calc_modifiers(
depsgraph, scene, ob, false, false, dataMask, false, false, nullptr, &result, nullptr);
return result;
}
Mesh *mesh_create_eval_no_deform_render(Depsgraph *depsgraph,
const Scene *scene,
Object *ob,
const CustomData_MeshMasks *dataMask)
{
Mesh *result;
mesh_calc_modifiers(
depsgraph, scene, ob, false, false, dataMask, false, false, nullptr, &result, nullptr);
return result;
}
/***/
Mesh *editbmesh_get_eval_cage(struct Depsgraph *depsgraph,
const Scene *scene,
Object *obedit,
BMEditMesh *em,
const CustomData_MeshMasks *dataMask)
{
CustomData_MeshMasks cddata_masks = *dataMask;
/* if there's no derived mesh or the last data mask used doesn't include
* the data we need, rebuild the derived mesh
*/
object_get_datamask(depsgraph, obedit, &cddata_masks, nullptr);
if (!obedit->runtime.editmesh_eval_cage ||
!CustomData_MeshMasks_are_matching(&(obedit->runtime.last_data_mask), &cddata_masks)) {
editbmesh_build_data(depsgraph, scene, obedit, em, &cddata_masks);
}
return obedit->runtime.editmesh_eval_cage;
}
Mesh *editbmesh_get_eval_cage_from_orig(struct Depsgraph *depsgraph,
const Scene *scene,
Object *obedit,
const CustomData_MeshMasks *dataMask)
{
BLI_assert((obedit->id.tag & LIB_TAG_COPIED_ON_WRITE) == 0);
const Scene *scene_eval = (const Scene *)DEG_get_evaluated_id(depsgraph, (ID *)&scene->id);
Object *obedit_eval = (Object *)DEG_get_evaluated_id(depsgraph, &obedit->id);
BMEditMesh *em_eval = BKE_editmesh_from_object(obedit_eval);
return editbmesh_get_eval_cage(depsgraph, scene_eval, obedit_eval, em_eval, dataMask);
}
/***/
/* same as above but for vert coords */
struct MappedUserData {
float (*vertexcos)[3];
BLI_bitmap *vertex_visit;
};
static void make_vertexcos__mapFunc(void *userData,
int index,
const float co[3],
const float /*no*/[3])
{
MappedUserData *mappedData = (MappedUserData *)userData;
if (BLI_BITMAP_TEST(mappedData->vertex_visit, index) == 0) {
/* we need coord from prototype vertex, not from copies,
* assume they stored in the beginning of vertex array stored in DM
* (mirror modifier for eg does this) */
copy_v3_v3(mappedData->vertexcos[index], co);
BLI_BITMAP_ENABLE(mappedData->vertex_visit, index);
}
}
void mesh_get_mapped_verts_coords(Mesh *me_eval, float (*r_cos)[3], const int totcos)
{
if (me_eval->runtime->deformed_only == false) {
MappedUserData userData;
memset(r_cos, 0, sizeof(*r_cos) * totcos);
userData.vertexcos = r_cos;
userData.vertex_visit = BLI_BITMAP_NEW(totcos, "vertexcos flags");
BKE_mesh_foreach_mapped_vert(me_eval, make_vertexcos__mapFunc, &userData, MESH_FOREACH_NOP);
MEM_freeN(userData.vertex_visit);
}
else {
const Span<float3> positions = me_eval->vert_positions();
for (int i = 0; i < totcos; i++) {
copy_v3_v3(r_cos[i], positions[i]);
}
}
}
static void mesh_init_origspace(Mesh *mesh)
{
const float default_osf[4][2] = {{0, 0}, {1, 0}, {1, 1}, {0, 1}};
OrigSpaceLoop *lof_array = (OrigSpaceLoop *)CustomData_get_layer_for_write(
&mesh->ldata, CD_ORIGSPACE_MLOOP, mesh->totloop);
const int numpoly = mesh->totpoly;
// const int numloop = mesh->totloop;
const Span<float3> positions = mesh->vert_positions();
const Span<MPoly> polys = mesh->polys();
const Span<MLoop> loops = mesh->loops();
const MPoly *mp = polys.data();
int i, j, k;
blender::Vector<blender::float2, 64> vcos_2d;
for (i = 0; i < numpoly; i++, mp++) {
OrigSpaceLoop *lof = lof_array + mp->loopstart;
if (ELEM(mp->totloop, 3, 4)) {
for (j = 0; j < mp->totloop; j++, lof++) {
copy_v2_v2(lof->uv, default_osf[j]);
}
}
else {
const MLoop *l = &loops[mp->loopstart];
float p_nor[3], co[3];
float mat[3][3];
float min[2] = {FLT_MAX, FLT_MAX}, max[2] = {-FLT_MAX, -FLT_MAX};
float translate[2], scale[2];
BKE_mesh_calc_poly_normal(
mp, l, reinterpret_cast<const float(*)[3]>(positions.data()), p_nor);
axis_dominant_v3_to_m3(mat, p_nor);
vcos_2d.resize(mp->totloop);
for (j = 0; j < mp->totloop; j++, l++) {
mul_v3_m3v3(co, mat, positions[l->v]);
copy_v2_v2(vcos_2d[j], co);
for (k = 0; k < 2; k++) {
if (co[k] > max[k]) {
max[k] = co[k];
}
else if (co[k] < min[k]) {
min[k] = co[k];
}
}
}
/* Brings min to (0, 0). */
negate_v2_v2(translate, min);
/* Scale will bring max to (1, 1). */
sub_v2_v2v2(scale, max, min);
if (scale[0] == 0.0f) {
scale[0] = 1e-9f;
}
if (scale[1] == 0.0f) {
scale[1] = 1e-9f;
}
invert_v2(scale);
/* Finally, transform all vcos_2d into ((0, 0), (1, 1))
* square and assign them as origspace. */
for (j = 0; j < mp->totloop; j++, lof++) {
add_v2_v2v2(lof->uv, vcos_2d[j], translate);
mul_v2_v2(lof->uv, scale);
}
}
}
BKE_mesh_tessface_clear(mesh);
}
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