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/*
* 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) 2005 Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
#include "DNA_listBase.h"
#include "DNA_mesh_types.h"
#include "DNA_object_types.h"
#include "BLI_bitmap.h"
#include "BLI_math.h"
#include "BKE_DerivedMesh.h"
#include "BKE_editmesh.h"
#include "BKE_editmesh_cache.h"
#include "BKE_lib_id.h"
#include "BKE_mesh.h"
#include "BKE_mesh_iterators.h"
#include "BKE_mesh_wrapper.h"
#include "BKE_object.h"
/**
* \note The caller is responsible for ensuring triangulation data,
* typically by calling #BKE_editmesh_looptri_calc.
*/
BMEditMesh *BKE_editmesh_create(BMesh *bm)
{
BMEditMesh *em = MEM_callocN(sizeof(BMEditMesh), __func__);
em->bm = bm;
return em;
}
BMEditMesh *BKE_editmesh_copy(BMEditMesh *em)
{
BMEditMesh *em_copy = MEM_callocN(sizeof(BMEditMesh), __func__);
*em_copy = *em;
em_copy->mesh_eval_cage = em_copy->mesh_eval_final = NULL;
em_copy->bb_cage = NULL;
em_copy->bm = BM_mesh_copy(em->bm);
/* The tessellation is NOT calculated on the copy here,
* because currently all the callers of this function use
* it to make a backup copy of the #BMEditMesh to restore
* it in the case of errors in an operation. For performance reasons,
* in that case it makes more sense to do the
* tessellation only when/if that copy ends up getting used. */
em_copy->looptris = NULL;
/* Copy various settings. */
em_copy->selectmode = em->selectmode;
em_copy->mat_nr = em->mat_nr;
return em_copy;
}
/**
* \brief Return the BMEditMesh for a given object
*
* \note this function assumes this is a mesh object,
* don't add NULL data check here. caller must do that
*/
BMEditMesh *BKE_editmesh_from_object(Object *ob)
{
BLI_assert(ob->type == OB_MESH);
/* sanity check */
#if 0 /* disable in mutlti-object edit. */
# ifndef NDEBUG
if (((Mesh *)ob->data)->edit_mesh) {
BLI_assert(((Mesh *)ob->data)->edit_mesh->ob == ob);
}
# endif
#endif
return ((Mesh *)ob->data)->edit_mesh;
}
static void editmesh_tessface_calc_intern(BMEditMesh *em,
const struct BMeshCalcTessellation_Params *params)
{
/* allocating space before calculating the tessellation */
BMesh *bm = em->bm;
/* This assumes all faces can be scan-filled, which isn't always true,
* worst case we over allocate a little which is acceptable. */
const int looptris_tot = poly_to_tri_count(bm->totface, bm->totloop);
const int looptris_tot_prev_alloc = em->looptris ?
(MEM_allocN_len(em->looptris) / sizeof(*em->looptris)) :
0;
BMLoop *(*looptris)[3];
/* this means no reallocs for quad dominant models, for */
if ((em->looptris != NULL) &&
/* (*em->tottri >= looptris_tot)) */
/* Check against allocated size in case we over allocated a little. */
((looptris_tot_prev_alloc >= looptris_tot) &&
(looptris_tot_prev_alloc <= looptris_tot * 2))) {
looptris = em->looptris;
}
else {
if (em->looptris) {
MEM_freeN(em->looptris);
}
looptris = MEM_mallocN(sizeof(*looptris) * looptris_tot, __func__);
}
em->looptris = looptris;
em->tottri = looptris_tot;
/* after allocating the em->looptris, we're ready to tessellate */
BM_mesh_calc_tessellation_ex(em->bm, em->looptris, params);
}
void BKE_editmesh_looptri_calc_ex(BMEditMesh *em,
const struct BMeshCalcTessellation_Params *params)
{
editmesh_tessface_calc_intern(em, params);
/* commented because editbmesh_build_data() ensures we get tessfaces */
#if 0
if (em->mesh_eval_final && em->mesh_eval_final == em->mesh_eval_cage) {
BKE_mesh_runtime_looptri_ensure(em->mesh_eval_final);
}
else if (em->mesh_eval_final) {
BKE_mesh_runtime_looptri_ensure(em->mesh_eval_final);
BKE_mesh_runtime_looptri_ensure(em->mesh_eval_cage);
}
#endif
}
void BKE_editmesh_looptri_calc(BMEditMesh *em)
{
BKE_editmesh_looptri_calc_ex(em,
&(const struct BMeshCalcTessellation_Params){
.face_normals = false,
});
}
/**
* Performing the face normal calculation at the same time as tessellation
* gives a reasonable performance boost (approx ~20% faster).
*/
void BKE_editmesh_looptri_and_normals_calc(BMEditMesh *em)
{
BKE_editmesh_looptri_calc_ex(em,
&(const struct BMeshCalcTessellation_Params){
.face_normals = true,
});
BM_mesh_normals_update_ex(em->bm,
&(const struct BMeshNormalsUpdate_Params){
.face_normals = false,
});
}
void BKE_editmesh_looptri_calc_with_partial_ex(BMEditMesh *em,
struct BMPartialUpdate *bmpinfo,
const struct BMeshCalcTessellation_Params *params)
{
BLI_assert(em->tottri == poly_to_tri_count(em->bm->totface, em->bm->totloop));
BLI_assert(em->looptris != NULL);
BM_mesh_calc_tessellation_with_partial_ex(em->bm, em->looptris, bmpinfo, params);
}
void BKE_editmesh_looptri_calc_with_partial(BMEditMesh *em, struct BMPartialUpdate *bmpinfo)
{
BKE_editmesh_looptri_calc_with_partial_ex(em,
bmpinfo,
&(const struct BMeshCalcTessellation_Params){
.face_normals = false,
});
}
void BKE_editmesh_looptri_and_normals_calc_with_partial(BMEditMesh *em,
struct BMPartialUpdate *bmpinfo)
{
BKE_editmesh_looptri_calc_with_partial_ex(em,
bmpinfo,
&(const struct BMeshCalcTessellation_Params){
.face_normals = true,
});
BM_mesh_normals_update_with_partial_ex(em->bm,
bmpinfo,
&(const struct BMeshNormalsUpdate_Params){
.face_normals = false,
});
}
void BKE_editmesh_free_derived_caches(BMEditMesh *em)
{
if (em->mesh_eval_cage) {
Mesh *me = em->mesh_eval_cage;
MEM_SAFE_FREE(me->edit_mesh);
BKE_id_free(NULL, me);
}
if (em->mesh_eval_final && em->mesh_eval_final != em->mesh_eval_cage) {
Mesh *me = em->mesh_eval_final;
MEM_SAFE_FREE(me->edit_mesh);
BKE_id_free(NULL, me);
}
em->mesh_eval_cage = em->mesh_eval_final = NULL;
MEM_SAFE_FREE(em->bb_cage);
}
/* Does not free the #BMEditMesh struct itself. */
void BKE_editmesh_free_data(BMEditMesh *em)
{
BKE_editmesh_free_derived_caches(em);
if (em->looptris) {
MEM_freeN(em->looptris);
}
if (em->bm) {
BM_mesh_free(em->bm);
}
}
struct CageUserData {
int totvert;
float (*cos_cage)[3];
BLI_bitmap *visit_bitmap;
};
static void cage_mapped_verts_callback(void *userData,
int index,
const float co[3],
const float UNUSED(no_f[3]),
const short UNUSED(no_s[3]))
{
struct CageUserData *data = userData;
if ((index >= 0 && index < data->totvert) && (!BLI_BITMAP_TEST(data->visit_bitmap, index))) {
BLI_BITMAP_ENABLE(data->visit_bitmap, index);
copy_v3_v3(data->cos_cage[index], co);
}
}
float (*BKE_editmesh_vert_coords_alloc(struct Depsgraph *depsgraph,
BMEditMesh *em,
struct Scene *scene,
Object *ob,
int *r_vert_len))[3]
{
Mesh *cage;
BLI_bitmap *visit_bitmap;
struct CageUserData data;
float(*cos_cage)[3];
cage = editbmesh_get_eval_cage(depsgraph, scene, ob, em, &CD_MASK_BAREMESH);
cos_cage = MEM_callocN(sizeof(*cos_cage) * em->bm->totvert, "bmbvh cos_cage");
/* when initializing cage verts, we only want the first cage coordinate for each vertex,
* so that e.g. mirror or array use original vertex coordinates and not mirrored or duplicate */
visit_bitmap = BLI_BITMAP_NEW(em->bm->totvert, __func__);
data.totvert = em->bm->totvert;
data.cos_cage = cos_cage;
data.visit_bitmap = visit_bitmap;
BKE_mesh_foreach_mapped_vert(cage, cage_mapped_verts_callback, &data, MESH_FOREACH_NOP);
MEM_freeN(visit_bitmap);
if (r_vert_len) {
*r_vert_len = em->bm->totvert;
}
return cos_cage;
}
const float (*BKE_editmesh_vert_coords_when_deformed(struct Depsgraph *depsgraph,
BMEditMesh *em,
struct Scene *scene,
Object *ob,
int *r_vert_len,
bool *r_is_alloc))[3]
{
const float(*coords)[3] = NULL;
*r_is_alloc = false;
Mesh *me = ob->data;
if ((me->runtime.edit_data != NULL) && (me->runtime.edit_data->vertexCos != NULL)) {
/* Deformed, and we have deformed coords already. */
coords = me->runtime.edit_data->vertexCos;
}
else if ((em->mesh_eval_final != NULL) &&
(em->mesh_eval_final->runtime.wrapper_type == ME_WRAPPER_TYPE_BMESH)) {
/* If this is an edit-mesh type, leave NULL as we can use the vertex coords. */
}
else {
/* Constructive modifiers have been used, we need to allocate coordinates. */
*r_is_alloc = true;
coords = BKE_editmesh_vert_coords_alloc(depsgraph, em, scene, ob, r_vert_len);
}
return coords;
}
float (*BKE_editmesh_vert_coords_alloc_orco(BMEditMesh *em, int *r_vert_len))[3]
{
return BM_mesh_vert_coords_alloc(em->bm, r_vert_len);
}
void BKE_editmesh_lnorspace_update(BMEditMesh *em, Mesh *me)
{
BMesh *bm = em->bm;
/* We need to create custom-loop-normals (CLNORS) data if none exist yet,
* otherwise there is no way to edit them.
* Similar code to #MESH_OT_customdata_custom_splitnormals_add operator,
* we want to keep same shading in case we were using auto-smooth so far.
* NOTE: there is a problem here, which is that if someone starts a normal editing operation on
* previously auto-smooth-ed mesh, and cancel that operation, generated CLNORS data remain,
* with related sharp edges (and hence auto-smooth is 'lost').
* Not sure how critical this is, and how to fix that issue? */
if (!CustomData_has_layer(&bm->ldata, CD_CUSTOMLOOPNORMAL)) {
if (me->flag & ME_AUTOSMOOTH) {
BM_edges_sharp_from_angle_set(bm, me->smoothresh);
}
}
BM_lnorspace_update(bm);
}
/* If autosmooth not already set, set it */
void BKE_editmesh_ensure_autosmooth(BMEditMesh *em, Mesh *me)
{
if (!(me->flag & ME_AUTOSMOOTH)) {
me->flag |= ME_AUTOSMOOTH;
BKE_editmesh_lnorspace_update(em, me);
}
}
BoundBox *BKE_editmesh_cage_boundbox_get(BMEditMesh *em)
{
if (em->bb_cage == NULL) {
float min[3], max[3];
INIT_MINMAX(min, max);
if (em->mesh_eval_cage) {
BKE_mesh_wrapper_minmax(em->mesh_eval_cage, min, max);
}
em->bb_cage = MEM_callocN(sizeof(BoundBox), "BMEditMesh.bb_cage");
BKE_boundbox_init_from_minmax(em->bb_cage, min, max);
}
return em->bb_cage;
}
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