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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) 2019 Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup edmesh
*
* Utility functions for merging geometry once transform has finished:
*
* - #EDBM_automerge
* - #EDBM_automerge_and_split
*/
#include "MEM_guardedalloc.h"
#include "BKE_editmesh.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "ED_mesh.h"
#include "tools/bmesh_intersect_edges.h"
//#define DEBUG_TIME
#ifdef DEBUG_TIME
# include "PIL_time.h"
#endif
/* use bmesh operator flags for a few operators */
#define BMO_ELE_TAG 1
/* -------------------------------------------------------------------- */
/** \name Auto-Merge Selection
*
* Used after transform operations.
* \{ */
void EDBM_automerge(Object *obedit, bool update, const char hflag, const float dist)
{
BMEditMesh *em = BKE_editmesh_from_object(obedit);
BMesh *bm = em->bm;
int totvert_prev = bm->totvert;
BMOperator findop, weldop;
/* Search for doubles among all vertices, but only merge non-VERT_KEEP
* vertices into VERT_KEEP vertices. */
BMO_op_initf(bm,
&findop,
BMO_FLAG_DEFAULTS,
"find_doubles verts=%av keep_verts=%Hv dist=%f",
hflag,
dist);
BMO_op_exec(bm, &findop);
/* weld the vertices */
BMO_op_init(bm, &weldop, BMO_FLAG_DEFAULTS, "weld_verts");
BMO_slot_copy(&findop, slots_out, "targetmap.out", &weldop, slots_in, "targetmap");
BMO_op_exec(bm, &weldop);
BMO_op_finish(bm, &findop);
BMO_op_finish(bm, &weldop);
if ((totvert_prev != bm->totvert) && update) {
EDBM_update_generic(obedit->data, true, true);
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Auto-Merge & Split Selection
*
* Used after transform operations.
* \{ */
void EDBM_automerge_and_split(Object *obedit,
const bool UNUSED(split_edges),
const bool split_faces,
const bool update,
const char hflag,
const float dist)
{
bool ok = false;
BMEditMesh *em = BKE_editmesh_from_object(obedit);
BMesh *bm = em->bm;
#ifdef DEBUG_TIME
em->bm = BM_mesh_copy(bm);
double t1 = PIL_check_seconds_timer();
EDBM_automerge(obedit, false, hflag, dist);
t1 = PIL_check_seconds_timer() - t1;
BM_mesh_free(em->bm);
em->bm = bm;
double t2 = PIL_check_seconds_timer();
#endif
BMOperator weldop;
BMOpSlot *slot_targetmap;
BMO_op_init(bm, &weldop, BMO_FLAG_DEFAULTS, "weld_verts");
slot_targetmap = BMO_slot_get(weldop.slots_in, "targetmap");
GHash *ghash_targetmap = BMO_SLOT_AS_GHASH(slot_targetmap);
ok = BM_mesh_intersect_edges(bm, hflag, dist, ghash_targetmap);
if (ok) {
GHashIterator gh_iter;
BMVert **v_survivors, **v_iter;
uint v_survivors_len = 0;
if (split_faces) {
BMVert *v_src, *v_dst;
GHASH_ITER (gh_iter, ghash_targetmap) {
v_src = BLI_ghashIterator_getKey(&gh_iter);
v_dst = BLI_ghashIterator_getValue(&gh_iter);
BM_elem_flag_disable(v_src, BM_ELEM_TAG);
BM_elem_flag_disable(v_dst, BM_ELEM_TAG);
}
int v_survivors_len_max = BLI_ghash_len(ghash_targetmap);
GHASH_ITER (gh_iter, ghash_targetmap) {
v_src = BLI_ghashIterator_getKey(&gh_iter);
v_dst = BLI_ghashIterator_getValue(&gh_iter);
if (!BM_elem_flag_test(v_src, BM_ELEM_TAG)) {
BM_elem_flag_enable(v_src, BM_ELEM_TAG);
}
if (BM_elem_flag_test(v_dst, BM_ELEM_TAG)) {
v_survivors_len_max--;
}
}
v_survivors = MEM_mallocN(sizeof(*v_survivors) * v_survivors_len_max, __func__);
v_iter = &v_survivors[0];
GHASH_ITER (gh_iter, ghash_targetmap) {
v_dst = BLI_ghashIterator_getValue(&gh_iter);
if (!BM_elem_flag_test(v_dst, BM_ELEM_TAG)) {
*v_iter = v_dst;
v_iter++;
v_survivors_len++;
}
}
}
BMO_op_exec(bm, &weldop);
BMEdge **edgenet = NULL;
int edgenet_alloc_len = 0;
if (split_faces) {
v_iter = &v_survivors[0];
for (int i = v_survivors_len; i--; v_iter++) {
BM_vert_weld_linked_wire_edges_into_linked_faces(
bm, *v_iter, dist, &edgenet, &edgenet_alloc_len);
}
MEM_freeN(v_survivors);
}
if (edgenet) {
MEM_freeN(edgenet);
}
}
BMO_op_finish(bm, &weldop);
#ifdef DEBUG_TIME
t2 = PIL_check_seconds_timer() - t2;
printf("t1: %lf; t2: %lf; fac: %lf\n", t1, t2, t1 / t2);
#endif
if (LIKELY(ok) && update) {
EDBM_update_generic(obedit->data, true, true);
}
}
/** \} */
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