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tornavis/source/blender/blenkernel/intern/mesh.c

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/mesh.c
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
#include "DNA_object_types.h"
#include "DNA_key_types.h"
#include "DNA_mesh_types.h"
#include "BLI_utildefines.h"
#include "BLI_math.h"
#include "BLI_linklist.h"
#include "BLI_memarena.h"
#include "BLI_edgehash.h"
#include "BLI_string.h"
#include "BKE_animsys.h"
#include "BKE_idcode.h"
#include "BKE_main.h"
#include "BKE_DerivedMesh.h"
#include "BKE_global.h"
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#include "BKE_library.h"
#include "BKE_material.h"
#include "BKE_modifier.h"
#include "BKE_multires.h"
#include "BKE_object.h"
#include "BKE_editmesh.h"
#include "DEG_depsgraph.h"
enum {
MESHCMP_DVERT_WEIGHTMISMATCH = 1,
MESHCMP_DVERT_GROUPMISMATCH,
MESHCMP_DVERT_TOTGROUPMISMATCH,
MESHCMP_LOOPCOLMISMATCH,
MESHCMP_LOOPUVMISMATCH,
MESHCMP_LOOPMISMATCH,
MESHCMP_POLYVERTMISMATCH,
MESHCMP_POLYMISMATCH,
MESHCMP_EDGEUNKNOWN,
MESHCMP_VERTCOMISMATCH,
MESHCMP_CDLAYERS_MISMATCH
};
static const char *cmpcode_to_str(int code)
{
switch (code) {
case MESHCMP_DVERT_WEIGHTMISMATCH:
return "Vertex Weight Mismatch";
case MESHCMP_DVERT_GROUPMISMATCH:
return "Vertex Group Mismatch";
case MESHCMP_DVERT_TOTGROUPMISMATCH:
return "Vertex Doesn't Belong To Same Number Of Groups";
case MESHCMP_LOOPCOLMISMATCH:
return "Vertex Color Mismatch";
case MESHCMP_LOOPUVMISMATCH:
return "UV Mismatch";
case MESHCMP_LOOPMISMATCH:
return "Loop Mismatch";
case MESHCMP_POLYVERTMISMATCH:
return "Loop Vert Mismatch In Poly Test";
case MESHCMP_POLYMISMATCH:
return "Loop Vert Mismatch";
case MESHCMP_EDGEUNKNOWN:
return "Edge Mismatch";
case MESHCMP_VERTCOMISMATCH:
return "Vertex Coordinate Mismatch";
case MESHCMP_CDLAYERS_MISMATCH:
return "CustomData Layer Count Mismatch";
default:
return "Mesh Comparison Code Unknown";
}
}
/* thresh is threshold for comparing vertices, uvs, vertex colors,
* weights, etc.*/
static int customdata_compare(CustomData *c1, CustomData *c2, Mesh *m1, Mesh *m2, const float thresh)
{
const float thresh_sq = thresh * thresh;
CustomDataLayer *l1, *l2;
int i, i1 = 0, i2 = 0, tot, j;
for (i = 0; i < c1->totlayer; i++) {
if (ELEM(c1->layers[i].type, CD_MVERT, CD_MEDGE, CD_MPOLY,
CD_MLOOPUV, CD_MLOOPCOL, CD_MDEFORMVERT))
{
i1++;
}
}
for (i = 0; i < c2->totlayer; i++) {
if (ELEM(c2->layers[i].type, CD_MVERT, CD_MEDGE, CD_MPOLY,
CD_MLOOPUV, CD_MLOOPCOL, CD_MDEFORMVERT))
{
i2++;
}
}
if (i1 != i2)
return MESHCMP_CDLAYERS_MISMATCH;
l1 = c1->layers; l2 = c2->layers;
tot = i1;
i1 = 0; i2 = 0;
for (i = 0; i < tot; i++) {
while (i1 < c1->totlayer && !ELEM(l1->type, CD_MVERT, CD_MEDGE, CD_MPOLY,
CD_MLOOPUV, CD_MLOOPCOL, CD_MDEFORMVERT))
{
i1++;
l1++;
}
while (i2 < c2->totlayer && !ELEM(l2->type, CD_MVERT, CD_MEDGE, CD_MPOLY,
CD_MLOOPUV, CD_MLOOPCOL, CD_MDEFORMVERT))
{
i2++;
l2++;
}
if (l1->type == CD_MVERT) {
MVert *v1 = l1->data;
MVert *v2 = l2->data;
int vtot = m1->totvert;
for (j = 0; j < vtot; j++, v1++, v2++) {
if (len_squared_v3v3(v1->co, v2->co) > thresh_sq)
return MESHCMP_VERTCOMISMATCH;
/* I don't care about normals, let's just do coodinates */
}
}
/*we're order-agnostic for edges here*/
if (l1->type == CD_MEDGE) {
MEdge *e1 = l1->data;
MEdge *e2 = l2->data;
int etot = m1->totedge;
EdgeHash *eh = BLI_edgehash_new_ex(__func__, etot);
for (j = 0; j < etot; j++, e1++) {
BLI_edgehash_insert(eh, e1->v1, e1->v2, e1);
}
for (j = 0; j < etot; j++, e2++) {
if (!BLI_edgehash_lookup(eh, e2->v1, e2->v2))
return MESHCMP_EDGEUNKNOWN;
}
BLI_edgehash_free(eh, NULL);
}
if (l1->type == CD_MPOLY) {
MPoly *p1 = l1->data;
MPoly *p2 = l2->data;
int ptot = m1->totpoly;
for (j = 0; j < ptot; j++, p1++, p2++) {
MLoop *lp1, *lp2;
int k;
if (p1->totloop != p2->totloop)
return MESHCMP_POLYMISMATCH;
lp1 = m1->mloop + p1->loopstart;
lp2 = m2->mloop + p2->loopstart;
for (k = 0; k < p1->totloop; k++, lp1++, lp2++) {
if (lp1->v != lp2->v)
return MESHCMP_POLYVERTMISMATCH;
}
}
}
if (l1->type == CD_MLOOP) {
MLoop *lp1 = l1->data;
MLoop *lp2 = l2->data;
int ltot = m1->totloop;
for (j = 0; j < ltot; j++, lp1++, lp2++) {
if (lp1->v != lp2->v)
return MESHCMP_LOOPMISMATCH;
}
}
if (l1->type == CD_MLOOPUV) {
MLoopUV *lp1 = l1->data;
MLoopUV *lp2 = l2->data;
int ltot = m1->totloop;
for (j = 0; j < ltot; j++, lp1++, lp2++) {
if (len_squared_v2v2(lp1->uv, lp2->uv) > thresh_sq)
return MESHCMP_LOOPUVMISMATCH;
}
}
if (l1->type == CD_MLOOPCOL) {
MLoopCol *lp1 = l1->data;
MLoopCol *lp2 = l2->data;
int ltot = m1->totloop;
for (j = 0; j < ltot; j++, lp1++, lp2++) {
if (ABS(lp1->r - lp2->r) > thresh ||
ABS(lp1->g - lp2->g) > thresh ||
ABS(lp1->b - lp2->b) > thresh ||
ABS(lp1->a - lp2->a) > thresh)
{
return MESHCMP_LOOPCOLMISMATCH;
}
}
}
if (l1->type == CD_MDEFORMVERT) {
MDeformVert *dv1 = l1->data;
MDeformVert *dv2 = l2->data;
int dvtot = m1->totvert;
for (j = 0; j < dvtot; j++, dv1++, dv2++) {
int k;
MDeformWeight *dw1 = dv1->dw, *dw2 = dv2->dw;
if (dv1->totweight != dv2->totweight)
return MESHCMP_DVERT_TOTGROUPMISMATCH;
for (k = 0; k < dv1->totweight; k++, dw1++, dw2++) {
if (dw1->def_nr != dw2->def_nr)
return MESHCMP_DVERT_GROUPMISMATCH;
if (fabsf(dw1->weight - dw2->weight) > thresh)
return MESHCMP_DVERT_WEIGHTMISMATCH;
}
}
}
}
return 0;
}
/**
* Used for unit testing; compares two meshes, checking only
* differences we care about. should be usable with leaf's
* testing framework I get RNA work done, will use hackish
* testing code for now.
*/
const char *BKE_mesh_cmp(Mesh *me1, Mesh *me2, float thresh)
{
int c;
if (!me1 || !me2)
return "Requires two input meshes";
if (me1->totvert != me2->totvert)
return "Number of verts don't match";
if (me1->totedge != me2->totedge)
return "Number of edges don't match";
if (me1->totpoly != me2->totpoly)
return "Number of faces don't match";
if (me1->totloop != me2->totloop)
return "Number of loops don't match";
if ((c = customdata_compare(&me1->vdata, &me2->vdata, me1, me2, thresh)))
return cmpcode_to_str(c);
if ((c = customdata_compare(&me1->edata, &me2->edata, me1, me2, thresh)))
return cmpcode_to_str(c);
if ((c = customdata_compare(&me1->ldata, &me2->ldata, me1, me2, thresh)))
return cmpcode_to_str(c);
if ((c = customdata_compare(&me1->pdata, &me2->pdata, me1, me2, thresh)))
return cmpcode_to_str(c);
return NULL;
}
static void mesh_ensure_tessellation_customdata(Mesh *me)
{
if (UNLIKELY((me->totface != 0) && (me->totpoly == 0))) {
/* Pass, otherwise this function clears 'mface' before
* versioning 'mface -> mpoly' code kicks in [#30583]
*
* Callers could also check but safer to do here - campbell */
}
else {
const int tottex_original = CustomData_number_of_layers(&me->ldata, CD_MLOOPUV);
const int totcol_original = CustomData_number_of_layers(&me->ldata, CD_MLOOPCOL);
const int tottex_tessface = CustomData_number_of_layers(&me->fdata, CD_MTFACE);
const int totcol_tessface = CustomData_number_of_layers(&me->fdata, CD_MCOL);
if (tottex_tessface != tottex_original ||
totcol_tessface != totcol_original)
{
BKE_mesh_tessface_clear(me);
CustomData_from_bmeshpoly(&me->fdata, &me->ldata, me->totface);
/* TODO - add some --debug-mesh option */
if (G.debug & G_DEBUG) {
/* note: this warning may be un-called for if we are initializing the mesh for the
* first time from bmesh, rather then giving a warning about this we could be smarter
* and check if there was any data to begin with, for now just print the warning with
* some info to help troubleshoot whats going on - campbell */
printf("%s: warning! Tessellation uvs or vcol data got out of sync, "
"had to reset!\n CD_MTFACE: %d != CD_MLOOPUV: %d || CD_MCOL: %d != CD_MLOOPCOL: %d\n",
__func__, tottex_tessface, tottex_original, totcol_tessface, totcol_original);
}
}
}
}
void BKE_mesh_ensure_skin_customdata(Mesh *me)
{
BMesh *bm = me->edit_btmesh ? me->edit_btmesh->bm : NULL;
MVertSkin *vs;
if (bm) {
if (!CustomData_has_layer(&bm->vdata, CD_MVERT_SKIN)) {
BMVert *v;
BMIter iter;
BM_data_layer_add(bm, &bm->vdata, CD_MVERT_SKIN);
/* Mark an arbitrary vertex as root */
BM_ITER_MESH (v, &iter, bm, BM_VERTS_OF_MESH) {
vs = CustomData_bmesh_get(&bm->vdata, v->head.data,
CD_MVERT_SKIN);
vs->flag |= MVERT_SKIN_ROOT;
break;
}
}
}
else {
if (!CustomData_has_layer(&me->vdata, CD_MVERT_SKIN)) {
vs = CustomData_add_layer(&me->vdata,
CD_MVERT_SKIN,
CD_DEFAULT,
NULL,
me->totvert);
/* Mark an arbitrary vertex as root */
if (vs) {
vs->flag |= MVERT_SKIN_ROOT;
}
}
}
}
bool BKE_mesh_ensure_facemap_customdata(struct Mesh *me)
{
BMesh *bm = me->edit_btmesh ? me->edit_btmesh->bm : NULL;
bool changed = false;
if (bm) {
if (!CustomData_has_layer(&bm->pdata, CD_FACEMAP)) {
BM_data_layer_add(bm, &bm->pdata, CD_FACEMAP);
changed = true;
}
}
else {
if (!CustomData_has_layer(&me->pdata, CD_FACEMAP)) {
CustomData_add_layer(&me->pdata,
CD_FACEMAP,
CD_DEFAULT,
NULL,
me->totpoly);
changed = true;
}
}
return changed;
}
bool BKE_mesh_clear_facemap_customdata(struct Mesh *me)
{
BMesh *bm = me->edit_btmesh ? me->edit_btmesh->bm : NULL;
bool changed = false;
if (bm) {
if (CustomData_has_layer(&bm->pdata, CD_FACEMAP)) {
BM_data_layer_free(bm, &bm->pdata, CD_FACEMAP);
changed = true;
}
}
else {
if (CustomData_has_layer(&me->pdata, CD_FACEMAP)) {
CustomData_free_layers(&me->pdata, CD_FACEMAP, me->totpoly);
changed = true;
}
}
return changed;
}
/* this ensures grouped customdata (e.g. mtexpoly and mloopuv and mtface, or
* mloopcol and mcol) have the same relative active/render/clone/mask indices.
*
* note that for undo mesh data we want to skip 'ensure_tess_cd' call since
* we don't want to store memory for tessface when its only used for older
* versions of the mesh. - campbell*/
static void mesh_update_linked_customdata(Mesh *me, const bool do_ensure_tess_cd)
{
if (do_ensure_tess_cd) {
mesh_ensure_tessellation_customdata(me);
}
CustomData_bmesh_update_active_layers(&me->fdata, &me->ldata);
}
void BKE_mesh_update_customdata_pointers(Mesh *me, const bool do_ensure_tess_cd)
{
mesh_update_linked_customdata(me, do_ensure_tess_cd);
me->mvert = CustomData_get_layer(&me->vdata, CD_MVERT);
me->dvert = CustomData_get_layer(&me->vdata, CD_MDEFORMVERT);
me->medge = CustomData_get_layer(&me->edata, CD_MEDGE);
me->mface = CustomData_get_layer(&me->fdata, CD_MFACE);
me->mcol = CustomData_get_layer(&me->fdata, CD_MCOL);
me->mtface = CustomData_get_layer(&me->fdata, CD_MTFACE);
me->mpoly = CustomData_get_layer(&me->pdata, CD_MPOLY);
me->mloop = CustomData_get_layer(&me->ldata, CD_MLOOP);
me->mloopcol = CustomData_get_layer(&me->ldata, CD_MLOOPCOL);
me->mloopuv = CustomData_get_layer(&me->ldata, CD_MLOOPUV);
}
bool BKE_mesh_has_custom_loop_normals(Mesh *me)
{
if (me->edit_btmesh) {
return CustomData_has_layer(&me->edit_btmesh->bm->ldata, CD_CUSTOMLOOPNORMAL);
}
else {
return CustomData_has_layer(&me->ldata, CD_CUSTOMLOOPNORMAL);
}
}
/** Free (or release) any data used by this mesh (does not free the mesh itself). */
void BKE_mesh_free(Mesh *me)
{
BKE_animdata_free(&me->id, false);
BKE_mesh_runtime_clear_cache(me);
CustomData_free(&me->vdata, me->totvert);
CustomData_free(&me->edata, me->totedge);
CustomData_free(&me->fdata, me->totface);
CustomData_free(&me->ldata, me->totloop);
CustomData_free(&me->pdata, me->totpoly);
MEM_SAFE_FREE(me->mat);
MEM_SAFE_FREE(me->bb);
MEM_SAFE_FREE(me->mselect);
MEM_SAFE_FREE(me->edit_btmesh);
}
static void mesh_tessface_clear_intern(Mesh *mesh, int free_customdata)
{
if (free_customdata) {
CustomData_free(&mesh->fdata, mesh->totface);
}
else {
CustomData_reset(&mesh->fdata);
}
mesh->mface = NULL;
mesh->mtface = NULL;
mesh->mcol = NULL;
mesh->totface = 0;
}
void BKE_mesh_init(Mesh *me)
{
BLI_assert(MEMCMP_STRUCT_OFS_IS_ZERO(me, id));
me->size[0] = me->size[1] = me->size[2] = 1.0;
me->smoothresh = DEG2RADF(30);
me->texflag = ME_AUTOSPACE;
/* disable because its slow on many GPU's, see [#37518] */
#if 0
me->flag = ME_TWOSIDED;
#endif
me->drawflag = ME_DRAWEDGES | ME_DRAWFACES | ME_DRAWCREASES;
CustomData_reset(&me->vdata);
CustomData_reset(&me->edata);
CustomData_reset(&me->fdata);
CustomData_reset(&me->pdata);
CustomData_reset(&me->ldata);
}
Mesh *BKE_mesh_add(Main *bmain, const char *name)
{
Mesh *me;
me = BKE_libblock_alloc(bmain, ID_ME, name, 0);
BKE_mesh_init(me);
return me;
}
/**
* Only copy internal data of Mesh ID from source to already allocated/initialized destination.
* You probably nerver want to use that directly, use id_copy or BKE_id_copy_ex for typical needs.
*
* WARNING! This function will not handle ID user count!
*
* \param flag Copying options (see BKE_library.h's LIB_ID_COPY_... flags for more).
*/
void BKE_mesh_copy_data(Main *bmain, Mesh *me_dst, const Mesh *me_src, const int flag)
{
const bool do_tessface = ((me_src->totface != 0) && (me_src->totpoly == 0)); /* only do tessface if we have no polys */
CustomDataMask mask = CD_MASK_MESH;
if (me_src->id.tag & LIB_TAG_NO_MAIN) {
/* For copies in depsgraph, keep data like origindex and orco. */
mask |= CD_MASK_DERIVEDMESH;
}
me_dst->mat = MEM_dupallocN(me_src->mat);
const eCDAllocType alloc_type = (flag & LIB_ID_COPY_CD_REFERENCE) ? CD_REFERENCE : CD_DUPLICATE;
CustomData_copy(&me_src->vdata, &me_dst->vdata, mask, alloc_type, me_dst->totvert);
CustomData_copy(&me_src->edata, &me_dst->edata, mask, alloc_type, me_dst->totedge);
CustomData_copy(&me_src->ldata, &me_dst->ldata, mask, alloc_type, me_dst->totloop);
CustomData_copy(&me_src->pdata, &me_dst->pdata, mask, alloc_type, me_dst->totpoly);
if (do_tessface) {
CustomData_copy(&me_src->fdata, &me_dst->fdata, mask, alloc_type, me_dst->totface);
}
else {
mesh_tessface_clear_intern(me_dst, false);
}
BKE_mesh_update_customdata_pointers(me_dst, do_tessface);
me_dst->edit_btmesh = NULL;
/* Call BKE_mesh_runtime_reset? */
me_dst->runtime.batch_cache = NULL;
me_dst->runtime.looptris.array = NULL;
me_dst->runtime.bvh_cache = NULL;
if (me_src->id.tag & LIB_TAG_NO_MAIN) {
me_dst->runtime.deformed_only = me_src->runtime.deformed_only;
}
else {
/* This is a direct copy of a main mesh, so for now it has the same topology. */
me_dst->runtime.deformed_only = 1;
}
me_dst->mselect = MEM_dupallocN(me_dst->mselect);
me_dst->bb = MEM_dupallocN(me_dst->bb);
/* TODO Do we want to add flag to prevent this? */
if (me_src->key && (flag & LIB_ID_COPY_SHAPEKEY)) {
BKE_id_copy_ex(bmain, &me_src->key->id, (ID **)&me_dst->key, flag, false);
}
}
/* Custom data layer functions; those assume that totXXX are set correctly. */
static void mesh_ensure_cdlayers_primary(Mesh *mesh, bool do_tessface)
{
if (!CustomData_get_layer(&mesh->vdata, CD_MVERT))
CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_CALLOC, NULL, mesh->totvert);
if (!CustomData_get_layer(&mesh->edata, CD_MEDGE))
CustomData_add_layer(&mesh->edata, CD_MEDGE, CD_CALLOC, NULL, mesh->totedge);
if (!CustomData_get_layer(&mesh->ldata, CD_MLOOP))
CustomData_add_layer(&mesh->ldata, CD_MLOOP, CD_CALLOC, NULL, mesh->totloop);
if (!CustomData_get_layer(&mesh->pdata, CD_MPOLY))
CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_CALLOC, NULL, mesh->totpoly);
if (do_tessface && !CustomData_get_layer(&mesh->fdata, CD_MFACE))
CustomData_add_layer(&mesh->fdata, CD_MFACE, CD_CALLOC, NULL, mesh->totface);
}
static void mesh_ensure_cdlayers_origindex(Mesh *mesh, bool do_tessface)
{
if (!CustomData_get_layer(&mesh->vdata, CD_ORIGINDEX))
CustomData_add_layer(&mesh->vdata, CD_ORIGINDEX, CD_CALLOC, NULL, mesh->totvert);
if (!CustomData_get_layer(&mesh->edata, CD_ORIGINDEX))
CustomData_add_layer(&mesh->edata, CD_ORIGINDEX, CD_CALLOC, NULL, mesh->totedge);
if (!CustomData_get_layer(&mesh->pdata, CD_ORIGINDEX))
CustomData_add_layer(&mesh->pdata, CD_ORIGINDEX, CD_CALLOC, NULL, mesh->totpoly);
if (do_tessface && !CustomData_get_layer(&mesh->fdata, CD_ORIGINDEX))
CustomData_add_layer(&mesh->fdata, CD_ORIGINDEX, CD_CALLOC, NULL, mesh->totface);
}
Mesh *BKE_mesh_new_nomain(int verts_len, int edges_len, int tessface_len, int loops_len, int polys_len)
{
Mesh *mesh = BKE_libblock_alloc(
NULL, ID_ME,
BKE_idcode_to_name(ID_ME),
LIB_ID_CREATE_NO_MAIN |
LIB_ID_CREATE_NO_USER_REFCOUNT |
LIB_ID_CREATE_NO_DEG_TAG);
BKE_libblock_init_empty(&mesh->id);
/* don't use CustomData_reset(...); because we dont want to touch customdata */
copy_vn_i(mesh->vdata.typemap, CD_NUMTYPES, -1);
copy_vn_i(mesh->edata.typemap, CD_NUMTYPES, -1);
copy_vn_i(mesh->fdata.typemap, CD_NUMTYPES, -1);
copy_vn_i(mesh->ldata.typemap, CD_NUMTYPES, -1);
copy_vn_i(mesh->pdata.typemap, CD_NUMTYPES, -1);
mesh->totvert = verts_len;
mesh->totedge = edges_len;
mesh->totface = tessface_len;
mesh->totloop = loops_len;
mesh->totpoly = polys_len;
mesh_ensure_cdlayers_primary(mesh, true);
mesh_ensure_cdlayers_origindex(mesh, true);
BKE_mesh_update_customdata_pointers(mesh, false);
return mesh;
}
static Mesh *mesh_new_nomain_from_template_ex(
const Mesh *me_src,
int verts_len, int edges_len, int tessface_len,
int loops_len, int polys_len,
CustomDataMask mask)
{
const bool do_tessface = ((me_src->totface != 0) && (me_src->totpoly == 0)); /* only do tessface if we have no polys */
Mesh *me_dst = BKE_id_new_nomain(ID_ME, NULL);
me_dst->mat = MEM_dupallocN(me_src->mat);
me_dst->mselect = MEM_dupallocN(me_dst->mselect);
me_dst->totvert = verts_len;
me_dst->totedge = edges_len;
me_dst->totface = tessface_len;
me_dst->totloop = loops_len;
me_dst->totpoly = polys_len;
CustomData_copy(&me_src->vdata, &me_dst->vdata, mask, CD_CALLOC, verts_len);
CustomData_copy(&me_src->edata, &me_dst->edata, mask, CD_CALLOC, edges_len);
CustomData_copy(&me_src->ldata, &me_dst->ldata, mask, CD_CALLOC, loops_len);
CustomData_copy(&me_src->pdata, &me_dst->pdata, mask, CD_CALLOC, polys_len);
if (do_tessface) {
CustomData_copy(&me_src->fdata, &me_dst->fdata, mask, CD_CALLOC, tessface_len);
}
else {
mesh_tessface_clear_intern(me_dst, false);
}
/* The destination mesh should at least have valid primary CD layers,
* even in cases where the source mesh does not. */
mesh_ensure_cdlayers_primary(me_dst, do_tessface);
mesh_ensure_cdlayers_origindex(me_dst, false);
BKE_mesh_update_customdata_pointers(me_dst, false);
return me_dst;
}
Mesh * BKE_mesh_new_nomain_from_template(
const Mesh *me_src,
int verts_len, int edges_len, int tessface_len,
int loops_len, int polys_len)
{
return mesh_new_nomain_from_template_ex(
me_src,
verts_len, edges_len, tessface_len,
loops_len, polys_len,
CD_MASK_EVERYTHING);
}
Mesh *BKE_mesh_copy(Main *bmain, const Mesh *me)
{
Mesh *me_copy;
BKE_id_copy_ex(bmain, &me->id, (ID **)&me_copy, LIB_ID_COPY_SHAPEKEY, false);
return me_copy;
}
BMesh *BKE_mesh_to_bmesh_ex(
Mesh *me,
const struct BMeshCreateParams *create_params,
const struct BMeshFromMeshParams *convert_params)
{
BMesh *bm;
const BMAllocTemplate allocsize = BMALLOC_TEMPLATE_FROM_ME(me);
bm = BM_mesh_create(&allocsize, create_params);
BM_mesh_bm_from_me(bm, me, convert_params);
return bm;
}
BMesh *BKE_mesh_to_bmesh(
Mesh *me, Object *ob,
const bool add_key_index, const struct BMeshCreateParams *params)
{
return BKE_mesh_to_bmesh_ex(
me, params,
&(struct BMeshFromMeshParams){
.calc_face_normal = false,
.add_key_index = add_key_index,
.use_shapekey = true,
.active_shapekey = ob->shapenr,
});
}
Mesh *BKE_bmesh_to_mesh_nomain(BMesh *bm, const struct BMeshToMeshParams *params)
{
BLI_assert(params->calc_object_remap == false);
Mesh *mesh = BKE_id_new_nomain(ID_ME, NULL);
BM_mesh_bm_to_me(NULL, bm, mesh, params);
return mesh;
}
void BKE_mesh_make_local(Main *bmain, Mesh *me, const bool lib_local)
{
BKE_id_make_local_generic(bmain, &me->id, true, lib_local);
}
bool BKE_mesh_uv_cdlayer_rename_index(
Mesh *me, const int loop_index, const int face_index,
const char *new_name, const bool do_tessface)
{
CustomData *ldata, *fdata;
CustomDataLayer *cdlu, *cdlf;
if (me->edit_btmesh) {
ldata = &me->edit_btmesh->bm->ldata;
fdata = NULL; /* No tessellated data in BMesh! */
}
else {
ldata = &me->ldata;
fdata = &me->fdata;
}
cdlu = &ldata->layers[loop_index];
cdlf = (face_index != -1) && fdata && do_tessface ? &fdata->layers[face_index] : NULL;
if (cdlu->name != new_name) {
/* Mesh validate passes a name from the CD layer as the new name,
* Avoid memcpy from self to self in this case.
*/
BLI_strncpy(cdlu->name, new_name, sizeof(cdlu->name));
CustomData_set_layer_unique_name(ldata, loop_index);
}
if (cdlf == NULL) {
return false;
}
BLI_strncpy(cdlf->name, cdlu->name, sizeof(cdlf->name));
CustomData_set_layer_unique_name(fdata, face_index);
return true;
}
bool BKE_mesh_uv_cdlayer_rename(Mesh *me, const char *old_name, const char *new_name, bool do_tessface)
{
CustomData *ldata, *fdata;
if (me->edit_btmesh) {
ldata = &me->edit_btmesh->bm->ldata;
/* No tessellated data in BMesh! */
fdata = NULL;
do_tessface = false;
}
else {
ldata = &me->ldata;
fdata = &me->fdata;
do_tessface = (do_tessface && fdata->totlayer);
}
{
const int lidx_start = CustomData_get_layer_index(ldata, CD_MLOOPUV);
const int fidx_start = do_tessface ? CustomData_get_layer_index(fdata, CD_MTFACE) : -1;
int lidx = CustomData_get_named_layer(ldata, CD_MLOOPUV, old_name);
int fidx = do_tessface ? CustomData_get_named_layer(fdata, CD_MTFACE, old_name) : -1;
/* None of those cases should happen, in theory!
* Note this assume we have the same number of mtexpoly, mloopuv and mtface layers!
*/
if (lidx == -1) {
if (fidx == -1) {
/* No layer found with this name! */
return false;
}
else {
lidx = fidx;
}
}
/* Go back to absolute indices! */
lidx += lidx_start;
if (fidx != -1)
fidx += fidx_start;
return BKE_mesh_uv_cdlayer_rename_index(me, lidx, fidx, new_name, do_tessface);
}
}
void BKE_mesh_boundbox_calc(Mesh *me, float r_loc[3], float r_size[3])
{
BoundBox *bb;
float min[3], max[3];
float mloc[3], msize[3];
if (me->bb == NULL) me->bb = MEM_callocN(sizeof(BoundBox), "boundbox");
bb = me->bb;
if (!r_loc) r_loc = mloc;
if (!r_size) r_size = msize;
INIT_MINMAX(min, max);
if (!BKE_mesh_minmax(me, min, max)) {
min[0] = min[1] = min[2] = -1.0f;
max[0] = max[1] = max[2] = 1.0f;
}
mid_v3_v3v3(r_loc, min, max);
r_size[0] = (max[0] - min[0]) / 2.0f;
r_size[1] = (max[1] - min[1]) / 2.0f;
r_size[2] = (max[2] - min[2]) / 2.0f;
BKE_boundbox_init_from_minmax(bb, min, max);
bb->flag &= ~BOUNDBOX_DIRTY;
}
void BKE_mesh_texspace_calc(Mesh *me)
{
float loc[3], size[3];
int a;
BKE_mesh_boundbox_calc(me, loc, size);
if (me->texflag & ME_AUTOSPACE) {
for (a = 0; a < 3; a++) {
if (size[a] == 0.0f) size[a] = 1.0f;
else if (size[a] > 0.0f && size[a] < 0.00001f) size[a] = 0.00001f;
else if (size[a] < 0.0f && size[a] > -0.00001f) size[a] = -0.00001f;
}
copy_v3_v3(me->loc, loc);
copy_v3_v3(me->size, size);
zero_v3(me->rot);
}
}
BoundBox *BKE_mesh_boundbox_get(Object *ob)
{
Mesh *me = ob->data;
if (ob->bb)
return ob->bb;
if (me->bb == NULL || (me->bb->flag & BOUNDBOX_DIRTY)) {
BKE_mesh_texspace_calc(me);
}
return me->bb;
}
void BKE_mesh_texspace_get(Mesh *me, float r_loc[3], float r_rot[3], float r_size[3])
{
if (me->bb == NULL || (me->bb->flag & BOUNDBOX_DIRTY)) {
BKE_mesh_texspace_calc(me);
}
if (r_loc) copy_v3_v3(r_loc, me->loc);
if (r_rot) copy_v3_v3(r_rot, me->rot);
if (r_size) copy_v3_v3(r_size, me->size);
}
void BKE_mesh_texspace_get_reference(Mesh *me, short **r_texflag, float **r_loc, float **r_rot, float **r_size)
{
if (me->bb == NULL || (me->bb->flag & BOUNDBOX_DIRTY)) {
BKE_mesh_texspace_calc(me);
}
if (r_texflag != NULL) *r_texflag = &me->texflag;
if (r_loc != NULL) *r_loc = me->loc;
if (r_rot != NULL) *r_rot = me->rot;
if (r_size != NULL) *r_size = me->size;
}
void BKE_mesh_texspace_copy_from_object(Mesh *me, Object *ob)
{
float *texloc, *texrot, *texsize;
short *texflag;
if (BKE_object_obdata_texspace_get(ob, &texflag, &texloc, &texsize, &texrot)) {
me->texflag = *texflag;
copy_v3_v3(me->loc, texloc);
copy_v3_v3(me->size, texsize);
copy_v3_v3(me->rot, texrot);
}
}
float (*BKE_mesh_orco_verts_get(Object *ob))[3]
{
Mesh *me = ob->data;
MVert *mvert = NULL;
Mesh *tme = me->texcomesh ? me->texcomesh : me;
int a, totvert;
float (*vcos)[3] = NULL;
/* Get appropriate vertex coordinates */
vcos = MEM_calloc_arrayN(me->totvert, sizeof(*vcos), "orco mesh");
mvert = tme->mvert;
totvert = min_ii(tme->totvert, me->totvert);
for (a = 0; a < totvert; a++, mvert++) {
copy_v3_v3(vcos[a], mvert->co);
}
return vcos;
}
void BKE_mesh_orco_verts_transform(Mesh *me, float (*orco)[3], int totvert, int invert)
{
float loc[3], size[3];
int a;
BKE_mesh_texspace_get(me->texcomesh ? me->texcomesh : me, loc, NULL, size);
if (invert) {
for (a = 0; a < totvert; a++) {
float *co = orco[a];
madd_v3_v3v3v3(co, loc, co, size);
}
}
else {
for (a = 0; a < totvert; a++) {
float *co = orco[a];
co[0] = (co[0] - loc[0]) / size[0];
co[1] = (co[1] - loc[1]) / size[1];
co[2] = (co[2] - loc[2]) / size[2];
}
}
}
/* rotates the vertices of a face in case v[2] or v[3] (vertex index) is = 0.
* this is necessary to make the if (mface->v4) check for quads work */
int test_index_face(MFace *mface, CustomData *fdata, int mfindex, int nr)
{
/* first test if the face is legal */
if ((mface->v3 || nr == 4) && mface->v3 == mface->v4) {
mface->v4 = 0;
nr--;
}
if ((mface->v2 || mface->v4) && mface->v2 == mface->v3) {
mface->v3 = mface->v4;
mface->v4 = 0;
nr--;
}
if (mface->v1 == mface->v2) {
mface->v2 = mface->v3;
mface->v3 = mface->v4;
mface->v4 = 0;
nr--;
}
/* check corrupt cases, bow-tie geometry, cant handle these because edge data wont exist so just return 0 */
if (nr == 3) {
if (
/* real edges */
mface->v1 == mface->v2 ||
mface->v2 == mface->v3 ||
mface->v3 == mface->v1)
{
return 0;
}
}
else if (nr == 4) {
if (
/* real edges */
mface->v1 == mface->v2 ||
mface->v2 == mface->v3 ||
mface->v3 == mface->v4 ||
mface->v4 == mface->v1 ||
/* across the face */
mface->v1 == mface->v3 ||
mface->v2 == mface->v4)
{
return 0;
}
}
/* prevent a zero at wrong index location */
if (nr == 3) {
if (mface->v3 == 0) {
static int corner_indices[4] = {1, 2, 0, 3};
SWAP(unsigned int, mface->v1, mface->v2);
SWAP(unsigned int, mface->v2, mface->v3);
if (fdata)
CustomData_swap_corners(fdata, mfindex, corner_indices);
}
}
else if (nr == 4) {
if (mface->v3 == 0 || mface->v4 == 0) {
static int corner_indices[4] = {2, 3, 0, 1};
SWAP(unsigned int, mface->v1, mface->v3);
SWAP(unsigned int, mface->v2, mface->v4);
if (fdata)
CustomData_swap_corners(fdata, mfindex, corner_indices);
}
}
return nr;
}
Mesh *BKE_mesh_from_object(Object *ob)
{
if (ob == NULL) return NULL;
if (ob->type == OB_MESH) return ob->data;
else return NULL;
}
void BKE_mesh_assign_object(Main *bmain, Object *ob, Mesh *me)
{
Mesh *old = NULL;
multires_force_update(ob);
if (ob == NULL) return;
if (ob->type == OB_MESH) {
old = ob->data;
if (old)
id_us_min(&old->id);
ob->data = me;
id_us_plus((ID *)me);
}
test_object_materials(bmain, ob, (ID *)me);
test_object_modifiers(ob);
}
void BKE_mesh_material_index_remove(Mesh *me, short index)
{
MPoly *mp;
MFace *mf;
int i;
for (mp = me->mpoly, i = 0; i < me->totpoly; i++, mp++) {
if (mp->mat_nr && mp->mat_nr >= index) {
mp->mat_nr--;
}
}
for (mf = me->mface, i = 0; i < me->totface; i++, mf++) {
if (mf->mat_nr && mf->mat_nr >= index) {
mf->mat_nr--;
}
}
}
void BKE_mesh_material_index_clear(Mesh *me)
{
MPoly *mp;
MFace *mf;
int i;
for (mp = me->mpoly, i = 0; i < me->totpoly; i++, mp++) {
mp->mat_nr = 0;
}
for (mf = me->mface, i = 0; i < me->totface; i++, mf++) {
mf->mat_nr = 0;
}
}
void BKE_mesh_material_remap(Mesh *me, const unsigned int *remap, unsigned int remap_len)
{
const short remap_len_short = (short)remap_len;
#define MAT_NR_REMAP(n) \
if (n < remap_len_short) { \
BLI_assert(n >= 0 && remap[n] < remap_len_short); \
n = remap[n]; \
} ((void)0)
if (me->edit_btmesh) {
BMEditMesh *em = me->edit_btmesh;
BMIter iter;
BMFace *efa;
BM_ITER_MESH(efa, &iter, em->bm, BM_FACES_OF_MESH) {
MAT_NR_REMAP(efa->mat_nr);
}
}
else {
int i;
for (i = 0; i < me->totpoly; i++) {
MAT_NR_REMAP(me->mpoly[i].mat_nr);
}
}
#undef MAT_NR_REMAP
}
void BKE_mesh_smooth_flag_set(Object *meshOb, int enableSmooth)
{
Mesh *me = meshOb->data;
int i;
for (i = 0; i < me->totpoly; i++) {
MPoly *mp = &me->mpoly[i];
if (enableSmooth) {
mp->flag |= ME_SMOOTH;
}
else {
mp->flag &= ~ME_SMOOTH;
}
}
for (i = 0; i < me->totface; i++) {
MFace *mf = &me->mface[i];
if (enableSmooth) {
mf->flag |= ME_SMOOTH;
}
else {
mf->flag &= ~ME_SMOOTH;
}
}
}
/**
* Return a newly MEM_malloc'd array of all the mesh vertex locations
* \note \a r_verts_len may be NULL
*/
float (*BKE_mesh_vertexCos_get(const Mesh *me, int *r_verts_len))[3]
{
int i, verts_len = me->totvert;
float (*cos)[3] = MEM_malloc_arrayN(verts_len, sizeof(*cos), "vertexcos1");
if (r_verts_len) *r_verts_len = verts_len;
for (i = 0; i < verts_len; i++)
copy_v3_v3(cos[i], me->mvert[i].co);
return cos;
}
/**
* Find the index of the loop in 'poly' which references vertex,
* returns -1 if not found
*/
int poly_find_loop_from_vert(
const MPoly *poly, const MLoop *loopstart,
unsigned vert)
{
int j;
for (j = 0; j < poly->totloop; j++, loopstart++) {
if (loopstart->v == vert)
return j;
}
return -1;
}
/**
* Fill \a r_adj with the loop indices in \a poly adjacent to the
* vertex. Returns the index of the loop matching vertex, or -1 if the
* vertex is not in \a poly
*/
int poly_get_adj_loops_from_vert(
const MPoly *poly,
const MLoop *mloop, unsigned int vert,
unsigned int r_adj[2])
{
int corner = poly_find_loop_from_vert(poly,
&mloop[poly->loopstart],
vert);
if (corner != -1) {
#if 0 /* unused - this loop */
const MLoop *ml = &mloop[poly->loopstart + corner];
#endif
/* vertex was found */
r_adj[0] = ME_POLY_LOOP_PREV(mloop, poly, corner)->v;
r_adj[1] = ME_POLY_LOOP_NEXT(mloop, poly, corner)->v;
}
return corner;
}
/**
* Return the index of the edge vert that is not equal to \a v. If
* neither edge vertex is equal to \a v, returns -1.
*/
int BKE_mesh_edge_other_vert(const MEdge *e, int v)
{
if (e->v1 == v)
return e->v2;
else if (e->v2 == v)
return e->v1;
else
return -1;
}
/* basic vertex data functions */
bool BKE_mesh_minmax(const Mesh *me, float r_min[3], float r_max[3])
{
int i = me->totvert;
MVert *mvert;
for (mvert = me->mvert; i--; mvert++) {
minmax_v3v3_v3(r_min, r_max, mvert->co);
}
return (me->totvert != 0);
}
void BKE_mesh_transform(Mesh *me, float mat[4][4], bool do_keys)
{
int i;
MVert *mvert = me->mvert;
float (*lnors)[3] = CustomData_get_layer(&me->ldata, CD_NORMAL);
for (i = 0; i < me->totvert; i++, mvert++)
mul_m4_v3(mat, mvert->co);
if (do_keys && me->key) {
KeyBlock *kb;
for (kb = me->key->block.first; kb; kb = kb->next) {
float *fp = kb->data;
for (i = kb->totelem; i--; fp += 3) {
mul_m4_v3(mat, fp);
}
}
}
/* don't update normals, caller can do this explicitly.
* We do update loop normals though, those may not be auto-generated (see e.g. STL import script)! */
if (lnors) {
float m3[3][3];
copy_m3_m4(m3, mat);
normalize_m3(m3);
for (i = 0; i < me->totloop; i++, lnors++) {
mul_m3_v3(m3, *lnors);
}
}
}
void BKE_mesh_translate(Mesh *me, const float offset[3], const bool do_keys)
{
int i = me->totvert;
MVert *mvert;
for (mvert = me->mvert; i--; mvert++) {
add_v3_v3(mvert->co, offset);
}
if (do_keys && me->key) {
KeyBlock *kb;
for (kb = me->key->block.first; kb; kb = kb->next) {
float *fp = kb->data;
for (i = kb->totelem; i--; fp += 3) {
add_v3_v3(fp, offset);
}
}
}
}
void BKE_mesh_ensure_navmesh(Mesh *me)
{
if (!CustomData_has_layer(&me->pdata, CD_RECAST)) {
int i;
int polys_len = me->totpoly;
int *recastData;
recastData = (int *)MEM_malloc_arrayN(polys_len, sizeof(int), __func__);
for (i = 0; i < polys_len; i++) {
recastData[i] = i + 1;
}
CustomData_add_layer_named(&me->pdata, CD_RECAST, CD_ASSIGN, recastData, polys_len, "recastData");
}
}
void BKE_mesh_tessface_calc(Mesh *mesh)
{
mesh->totface = BKE_mesh_recalc_tessellation(&mesh->fdata, &mesh->ldata, &mesh->pdata,
mesh->mvert,
mesh->totface, mesh->totloop, mesh->totpoly,
/* calc normals right after, don't copy from polys here */
false);
BKE_mesh_update_customdata_pointers(mesh, true);
}
void BKE_mesh_tessface_ensure(Mesh *mesh)
{
if (mesh->totpoly && mesh->totface == 0) {
BKE_mesh_tessface_calc(mesh);
}
}
void BKE_mesh_tessface_clear(Mesh *mesh)
{
mesh_tessface_clear_intern(mesh, true);
}
void BKE_mesh_do_versions_cd_flag_init(Mesh *mesh)
{
if (UNLIKELY(mesh->cd_flag)) {
return;
}
else {
MVert *mv;
MEdge *med;
int i;
for (mv = mesh->mvert, i = 0; i < mesh->totvert; mv++, i++) {
if (mv->bweight != 0) {
mesh->cd_flag |= ME_CDFLAG_VERT_BWEIGHT;
break;
}
}
for (med = mesh->medge, i = 0; i < mesh->totedge; med++, i++) {
if (med->bweight != 0) {
mesh->cd_flag |= ME_CDFLAG_EDGE_BWEIGHT;
if (mesh->cd_flag & ME_CDFLAG_EDGE_CREASE) {
break;
}
}
if (med->crease != 0) {
mesh->cd_flag |= ME_CDFLAG_EDGE_CREASE;
if (mesh->cd_flag & ME_CDFLAG_EDGE_BWEIGHT) {
break;
}
}
}
}
}
/* -------------------------------------------------------------------- */
/* MSelect functions (currently used in weight paint mode) */
void BKE_mesh_mselect_clear(Mesh *me)
{
if (me->mselect) {
MEM_freeN(me->mselect);
me->mselect = NULL;
}
me->totselect = 0;
}
void BKE_mesh_mselect_validate(Mesh *me)
{
MSelect *mselect_src, *mselect_dst;
int i_src, i_dst;
if (me->totselect == 0)
return;
mselect_src = me->mselect;
mselect_dst = MEM_malloc_arrayN((me->totselect), sizeof(MSelect), "Mesh selection history");
for (i_src = 0, i_dst = 0; i_src < me->totselect; i_src++) {
int index = mselect_src[i_src].index;
switch (mselect_src[i_src].type) {
case ME_VSEL:
{
if (me->mvert[index].flag & SELECT) {
mselect_dst[i_dst] = mselect_src[i_src];
i_dst++;
}
break;
}
case ME_ESEL:
{
if (me->medge[index].flag & SELECT) {
mselect_dst[i_dst] = mselect_src[i_src];
i_dst++;
}
break;
}
case ME_FSEL:
{
if (me->mpoly[index].flag & SELECT) {
mselect_dst[i_dst] = mselect_src[i_src];
i_dst++;
}
break;
}
default:
{
BLI_assert(0);
break;
}
}
}
MEM_freeN(mselect_src);
if (i_dst == 0) {
MEM_freeN(mselect_dst);
mselect_dst = NULL;
}
else if (i_dst != me->totselect) {
mselect_dst = MEM_reallocN(mselect_dst, sizeof(MSelect) * i_dst);
}
me->totselect = i_dst;
me->mselect = mselect_dst;
}
/**
* Return the index within me->mselect, or -1
*/
int BKE_mesh_mselect_find(Mesh *me, int index, int type)
{
int i;
BLI_assert(ELEM(type, ME_VSEL, ME_ESEL, ME_FSEL));
for (i = 0; i < me->totselect; i++) {
if ((me->mselect[i].index == index) &&
(me->mselect[i].type == type))
{
return i;
}
}
return -1;
}
/**
* Return The index of the active element.
*/
int BKE_mesh_mselect_active_get(Mesh *me, int type)
{
BLI_assert(ELEM(type, ME_VSEL, ME_ESEL, ME_FSEL));
if (me->totselect) {
if (me->mselect[me->totselect - 1].type == type) {
return me->mselect[me->totselect - 1].index;
}
}
return -1;
}
void BKE_mesh_mselect_active_set(Mesh *me, int index, int type)
{
const int msel_index = BKE_mesh_mselect_find(me, index, type);
if (msel_index == -1) {
/* add to the end */
me->mselect = MEM_reallocN(me->mselect, sizeof(MSelect) * (me->totselect + 1));
me->mselect[me->totselect].index = index;
me->mselect[me->totselect].type = type;
me->totselect++;
}
else if (msel_index != me->totselect - 1) {
/* move to the end */
SWAP(MSelect, me->mselect[msel_index], me->mselect[me->totselect - 1]);
}
BLI_assert((me->mselect[me->totselect - 1].index == index) &&
(me->mselect[me->totselect - 1].type == type));
}
void BKE_mesh_apply_vert_coords(Mesh *mesh, float (*vertCoords)[3])
{
MVert *vert;
int i;
/* this will just return the pointer if it wasn't a referenced layer */
vert = CustomData_duplicate_referenced_layer(&mesh->vdata, CD_MVERT, mesh->totvert);
mesh->mvert = vert;
for (i = 0; i < mesh->totvert; ++i, ++vert)
copy_v3_v3(vert->co, vertCoords[i]);
mesh->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
}
/**
* Compute 'split' (aka loop, or per face corner's) normals.
*
* \param r_lnors_spacearr Allows to get computed loop normal space array. That data, among other things,
* contains 'smooth fan' info, useful e.g. to split geometry along sharp edges...
*/
void BKE_mesh_calc_normals_split_ex(Mesh *mesh, MLoopNorSpaceArray *r_lnors_spacearr)
{
float (*r_loopnors)[3];
float (*polynors)[3];
short (*clnors)[2] = NULL;
bool free_polynors = false;
/* Note that we enforce computing clnors when the clnor space array is requested by caller here.
* However, we obviously only use the autosmooth angle threshold only in case autosmooth is enabled. */
const bool use_split_normals = (r_lnors_spacearr != NULL) || ((mesh->flag & ME_AUTOSMOOTH) != 0);
const float split_angle = (mesh->flag & ME_AUTOSMOOTH) != 0 ? mesh->smoothresh : (float)M_PI;
if (CustomData_has_layer(&mesh->ldata, CD_NORMAL)) {
r_loopnors = CustomData_get_layer(&mesh->ldata, CD_NORMAL);
memset(r_loopnors, 0, sizeof(float[3]) * mesh->totloop);
}
else {
r_loopnors = CustomData_add_layer(&mesh->ldata, CD_NORMAL, CD_CALLOC, NULL, mesh->totloop);
CustomData_set_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
}
/* may be NULL */
clnors = CustomData_get_layer(&mesh->ldata, CD_CUSTOMLOOPNORMAL);
if (CustomData_has_layer(&mesh->pdata, CD_NORMAL)) {
/* This assume that layer is always up to date, not sure this is the case (esp. in Edit mode?)... */
polynors = CustomData_get_layer(&mesh->pdata, CD_NORMAL);
free_polynors = false;
}
else {
polynors = MEM_malloc_arrayN(mesh->totpoly, sizeof(float[3]), __func__);
BKE_mesh_calc_normals_poly(
mesh->mvert, NULL, mesh->totvert,
mesh->mloop, mesh->mpoly, mesh->totloop, mesh->totpoly, polynors, false);
free_polynors = true;
}
BKE_mesh_normals_loop_split(
mesh->mvert, mesh->totvert, mesh->medge, mesh->totedge,
mesh->mloop, r_loopnors, mesh->totloop, mesh->mpoly, (const float (*)[3])polynors, mesh->totpoly,
use_split_normals, split_angle, r_lnors_spacearr, clnors, NULL);
if (free_polynors) {
MEM_freeN(polynors);
}
mesh->runtime.cd_dirty_vert &= ~CD_MASK_NORMAL;
}
void BKE_mesh_calc_normals_split(Mesh *mesh)
{
BKE_mesh_calc_normals_split_ex(mesh, NULL);
}
/* Split faces helper functions. */
typedef struct SplitFaceNewVert {
struct SplitFaceNewVert *next;
int new_index;
int orig_index;
float *vnor;
} SplitFaceNewVert;
typedef struct SplitFaceNewEdge {
struct SplitFaceNewEdge *next;
int new_index;
int orig_index;
int v1;
int v2;
} SplitFaceNewEdge;
/* Detect needed new vertices, and update accordingly loops' vertex indices.
* WARNING! Leaves mesh in invalid state. */
static int split_faces_prepare_new_verts(
const Mesh *mesh, MLoopNorSpaceArray *lnors_spacearr, SplitFaceNewVert **new_verts, MemArena *memarena)
{
/* This is now mandatory, trying to do the job in simple way without that data is doomed to fail, even when only
* dealing with smooth/flat faces one can find cases that no simple algorithm can handle properly. */
BLI_assert(lnors_spacearr != NULL);
const int loops_len = mesh->totloop;
int verts_len = mesh->totvert;
MVert *mvert = mesh->mvert;
MLoop *mloop = mesh->mloop;
BLI_bitmap *verts_used = BLI_BITMAP_NEW(verts_len, __func__);
BLI_bitmap *done_loops = BLI_BITMAP_NEW(loops_len, __func__);
MLoop *ml = mloop;
MLoopNorSpace **lnor_space = lnors_spacearr->lspacearr;
BLI_assert(lnors_spacearr->data_type == MLNOR_SPACEARR_LOOP_INDEX);
for (int loop_idx = 0; loop_idx < loops_len; loop_idx++, ml++, lnor_space++) {
if (!BLI_BITMAP_TEST(done_loops, loop_idx)) {
const int vert_idx = ml->v;
const bool vert_used = BLI_BITMAP_TEST_BOOL(verts_used, vert_idx);
/* If vert is already used by another smooth fan, we need a new vert for this one. */
const int new_vert_idx = vert_used ? verts_len++ : vert_idx;
BLI_assert(*lnor_space);
if ((*lnor_space)->flags & MLNOR_SPACE_IS_SINGLE) {
/* Single loop in this fan... */
BLI_assert(GET_INT_FROM_POINTER((*lnor_space)->loops) == loop_idx);
BLI_BITMAP_ENABLE(done_loops, loop_idx);
if (vert_used) {
ml->v = new_vert_idx;
}
}
else {
for (LinkNode *lnode = (*lnor_space)->loops; lnode; lnode = lnode->next) {
const int ml_fan_idx = GET_INT_FROM_POINTER(lnode->link);
BLI_BITMAP_ENABLE(done_loops, ml_fan_idx);
if (vert_used) {
mloop[ml_fan_idx].v = new_vert_idx;
}
}
}
if (!vert_used) {
BLI_BITMAP_ENABLE(verts_used, vert_idx);
/* We need to update that vertex's normal here, we won't go over it again. */
/* This is important! *DO NOT* set vnor to final computed lnor, vnor should always be defined to
* 'automatic normal' value computed from its polys, not some custom normal.
* Fortunately, that's the loop normal space's 'lnor' reference vector. ;) */
normal_float_to_short_v3(mvert[vert_idx].no, (*lnor_space)->vec_lnor);
}
else {
/* Add new vert to list. */
SplitFaceNewVert *new_vert = BLI_memarena_alloc(memarena, sizeof(*new_vert));
new_vert->orig_index = vert_idx;
new_vert->new_index = new_vert_idx;
new_vert->vnor = (*lnor_space)->vec_lnor; /* See note above. */
new_vert->next = *new_verts;
*new_verts = new_vert;
}
}
}
MEM_freeN(done_loops);
MEM_freeN(verts_used);
return verts_len - mesh->totvert;
}
/* Detect needed new edges, and update accordingly loops' edge indices.
* WARNING! Leaves mesh in invalid state. */
static int split_faces_prepare_new_edges(
const Mesh *mesh, SplitFaceNewEdge **new_edges, MemArena *memarena)
{
const int num_polys = mesh->totpoly;
int num_edges = mesh->totedge;
MEdge *medge = mesh->medge;
MLoop *mloop = mesh->mloop;
const MPoly *mpoly = mesh->mpoly;
BLI_bitmap *edges_used = BLI_BITMAP_NEW(num_edges, __func__);
EdgeHash *edges_hash = BLI_edgehash_new_ex(__func__, num_edges);
const MPoly *mp = mpoly;
for (int poly_idx = 0; poly_idx < num_polys; poly_idx++, mp++) {
MLoop *ml_prev = &mloop[mp->loopstart + mp->totloop - 1];
MLoop *ml = &mloop[mp->loopstart];
for (int loop_idx = 0; loop_idx < mp->totloop; loop_idx++, ml++) {
void **eval;
if (!BLI_edgehash_ensure_p(edges_hash, ml_prev->v, ml->v, &eval)) {
const int edge_idx = ml_prev->e;
/* That edge has not been encountered yet, define it. */
if (BLI_BITMAP_TEST(edges_used, edge_idx)) {
/* Original edge has already been used, we need to define a new one. */
const int new_edge_idx = num_edges++;
*eval = SET_INT_IN_POINTER(new_edge_idx);
ml_prev->e = new_edge_idx;
SplitFaceNewEdge *new_edge = BLI_memarena_alloc(memarena, sizeof(*new_edge));
new_edge->orig_index = edge_idx;
new_edge->new_index = new_edge_idx;
new_edge->v1 = ml_prev->v;
new_edge->v2 = ml->v;
new_edge->next = *new_edges;
*new_edges = new_edge;
}
else {
/* We can re-use original edge. */
medge[edge_idx].v1 = ml_prev->v;
medge[edge_idx].v2 = ml->v;
*eval = SET_INT_IN_POINTER(edge_idx);
BLI_BITMAP_ENABLE(edges_used, edge_idx);
}
}
else {
/* Edge already known, just update loop's edge index. */
ml_prev->e = GET_INT_FROM_POINTER(*eval);
}
ml_prev = ml;
}
}
MEM_freeN(edges_used);
BLI_edgehash_free(edges_hash, NULL);
return num_edges - mesh->totedge;
}
/* Perform actual split of vertices. */
static void split_faces_split_new_verts(
Mesh *mesh, SplitFaceNewVert *new_verts, const int num_new_verts)
{
const int verts_len = mesh->totvert - num_new_verts;
MVert *mvert = mesh->mvert;
/* Remember new_verts is a single linklist, so its items are in reversed order... */
MVert *new_mv = &mvert[mesh->totvert - 1];
for (int i = mesh->totvert - 1; i >= verts_len ; i--, new_mv--, new_verts = new_verts->next) {
BLI_assert(new_verts->new_index == i);
BLI_assert(new_verts->new_index != new_verts->orig_index);
CustomData_copy_data(&mesh->vdata, &mesh->vdata, new_verts->orig_index, i, 1);
if (new_verts->vnor) {
normal_float_to_short_v3(new_mv->no, new_verts->vnor);
}
}
}
/* Perform actual split of edges. */
static void split_faces_split_new_edges(
Mesh *mesh, SplitFaceNewEdge *new_edges, const int num_new_edges)
{
const int num_edges = mesh->totedge - num_new_edges;
MEdge *medge = mesh->medge;
/* Remember new_edges is a single linklist, so its items are in reversed order... */
MEdge *new_med = &medge[mesh->totedge - 1];
for (int i = mesh->totedge - 1; i >= num_edges ; i--, new_med--, new_edges = new_edges->next) {
BLI_assert(new_edges->new_index == i);
BLI_assert(new_edges->new_index != new_edges->orig_index);
CustomData_copy_data(&mesh->edata, &mesh->edata, new_edges->orig_index, i, 1);
new_med->v1 = new_edges->v1;
new_med->v2 = new_edges->v2;
}
}
/* Split faces based on the edge angle and loop normals.
* Matches behavior of face splitting in render engines.
*
* NOTE: Will leave CD_NORMAL loop data layer which is
* used by render engines to set shading up.
*/
void BKE_mesh_split_faces(Mesh *mesh, bool free_loop_normals)
{
const int num_polys = mesh->totpoly;
if (num_polys == 0) {
return;
}
BKE_mesh_tessface_clear(mesh);
MLoopNorSpaceArray lnors_spacearr = {NULL};
/* Compute loop normals and loop normal spaces (a.k.a. smooth fans of faces around vertices). */
BKE_mesh_calc_normals_split_ex(mesh, &lnors_spacearr);
/* Stealing memarena from loop normals space array. */
MemArena *memarena = lnors_spacearr.mem;
SplitFaceNewVert *new_verts = NULL;
SplitFaceNewEdge *new_edges = NULL;
/* Detect loop normal spaces (a.k.a. smooth fans) that will need a new vert. */
const int num_new_verts = split_faces_prepare_new_verts(mesh, &lnors_spacearr, &new_verts, memarena);
if (num_new_verts > 0) {
/* Reminder: beyond this point, there is no way out, mesh is in invalid state (due to early-reassignment of
* loops' vertex and edge indices to new, to-be-created split ones). */
const int num_new_edges = split_faces_prepare_new_edges(mesh, &new_edges, memarena);
/* We can have to split a vertex without having to add a single new edge... */
const bool do_edges = (num_new_edges > 0);
/* Reallocate all vert and edge related data. */
mesh->totvert += num_new_verts;
CustomData_realloc(&mesh->vdata, mesh->totvert);
if (do_edges) {
mesh->totedge += num_new_edges;
CustomData_realloc(&mesh->edata, mesh->totedge);
}
/* Update pointers to a newly allocated memory. */
BKE_mesh_update_customdata_pointers(mesh, false);
/* Perform actual split of vertices and edges. */
split_faces_split_new_verts(mesh, new_verts, num_new_verts);
if (do_edges) {
split_faces_split_new_edges(mesh, new_edges, num_new_edges);
}
}
/* Note: after this point mesh is expected to be valid again. */
/* CD_NORMAL is expected to be temporary only. */
if (free_loop_normals) {
CustomData_free_layers(&mesh->ldata, CD_NORMAL, mesh->totloop);
}
/* Also frees new_verts/edges temp data, since we used its memarena to allocate them. */
BKE_lnor_spacearr_free(&lnors_spacearr);
#ifdef VALIDATE_MESH
BKE_mesh_validate(mesh, true, true);
#endif
}
/* **** Depsgraph evaluation **** */
void BKE_mesh_eval_geometry(Depsgraph *depsgraph,
Mesh *mesh)
{
DEG_debug_print_eval(depsgraph, __func__, mesh->id.name, mesh);
if (mesh->bb == NULL || (mesh->bb->flag & BOUNDBOX_DIRTY)) {
BKE_mesh_texspace_calc(mesh);
}
}
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