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/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2005 by the Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Joseph Eagar
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*
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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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/** \file blender/blenkernel/intern/modifiers_bmesh.c
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* \ingroup bke
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*/
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#include "MEM_guardedalloc.h"
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#include "BLI_math.h"
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#include "BLI_alloca.h"
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#include "BKE_DerivedMesh.h"
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#include "BKE_editmesh.h"
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/* Static function for alloc */
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static BMFace *bm_face_create_from_mpoly(
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MPoly *mp, MLoop *ml,
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BMesh *bm, BMVert **vtable, BMEdge **etable)
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{
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BMVert **verts = BLI_array_alloca(verts, mp->totloop);
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BMEdge **edges = BLI_array_alloca(edges, mp->totloop);
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int j;
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for (j = 0; j < mp->totloop; j++, ml++) {
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verts[j] = vtable[ml->v];
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edges[j] = etable[ml->e];
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}
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return BM_face_create(bm, verts, edges, mp->totloop, NULL, BM_CREATE_SKIP_CD);
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}
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/**
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* The main function for copying DerivedMesh data into BMesh.
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*
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* \note The mesh may already have geometry. see 'is_init'
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*/
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void DM_to_bmesh_ex(DerivedMesh *dm, BMesh *bm, const bool calc_face_normal)
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{
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MVert *mv, *mvert;
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MEdge *me, *medge;
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MPoly *mpoly, *mp;
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MLoop *mloop;
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BMVert *v, **vtable;
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BMEdge *e, **etable;
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float (*face_normals)[3];
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BMFace *f;
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int i, j, totvert, totedge /* , totface */ /* UNUSED */ ;
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bool is_init = (bm->totvert == 0) && (bm->totedge == 0) && (bm->totface == 0);
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char has_orig_htype = 0;
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int cd_vert_bweight_offset;
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int cd_edge_bweight_offset;
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int cd_edge_crease_offset;
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if (is_init == false) {
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/* check if we have an origflag */
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has_orig_htype |= CustomData_has_layer(&bm->vdata, CD_ORIGINDEX) ? BM_VERT : 0;
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has_orig_htype |= CustomData_has_layer(&bm->edata, CD_ORIGINDEX) ? BM_EDGE : 0;
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has_orig_htype |= CustomData_has_layer(&bm->pdata, CD_ORIGINDEX) ? BM_FACE : 0;
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}
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/*merge custom data layout*/
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CustomData_bmesh_merge(&dm->vertData, &bm->vdata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_VERT);
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CustomData_bmesh_merge(&dm->edgeData, &bm->edata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_EDGE);
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CustomData_bmesh_merge(&dm->loopData, &bm->ldata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_LOOP);
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CustomData_bmesh_merge(&dm->polyData, &bm->pdata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_FACE);
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if (is_init) {
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BM_mesh_cd_flag_apply(bm, dm->cd_flag);
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}
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cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
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cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
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cd_edge_crease_offset = CustomData_get_offset(&bm->edata, CD_CREASE);
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totvert = dm->getNumVerts(dm);
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totedge = dm->getNumEdges(dm);
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/* totface = dm->getNumPolys(dm); */ /* UNUSED */
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vtable = MEM_mallocN(sizeof(*vtable) * totvert, __func__);
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etable = MEM_mallocN(sizeof(*etable) * totedge, __func__);
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/*do verts*/
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bool vert_allocated;
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mv = mvert = DM_get_vert_array(dm, &vert_allocated);;
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for (i = 0; i < totvert; i++, mv++) {
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v = BM_vert_create(bm, mv->co, NULL, BM_CREATE_SKIP_CD);
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normal_short_to_float_v3(v->no, mv->no);
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v->head.hflag = BM_vert_flag_from_mflag(mv->flag);
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BM_elem_index_set(v, i); /* set_inline */
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CustomData_to_bmesh_block(&dm->vertData, &bm->vdata, i, &v->head.data, true);
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vtable[i] = v;
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/* add bevel weight */
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if (cd_vert_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(v, cd_vert_bweight_offset, (float)mv->bweight / 255.0f);
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if (UNLIKELY(has_orig_htype & BM_VERT)) {
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int *orig_index = CustomData_bmesh_get(&bm->vdata, v->head.data, CD_ORIGINDEX);
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*orig_index = ORIGINDEX_NONE;
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}
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}
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if (vert_allocated) MEM_freeN(mvert);
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if (is_init) bm->elem_index_dirty &= ~BM_VERT;
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/*do edges*/
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bool edge_allocated;
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me = medge = DM_get_edge_array(dm, &edge_allocated);
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for (i = 0; i < totedge; i++, me++) {
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//BLI_assert(BM_edge_exists(vtable[me->v1], vtable[me->v2]) == NULL);
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e = BM_edge_create(bm, vtable[me->v1], vtable[me->v2], NULL, BM_CREATE_SKIP_CD);
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e->head.hflag = BM_edge_flag_from_mflag(me->flag);
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BM_elem_index_set(e, i); /* set_inline */
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CustomData_to_bmesh_block(&dm->edgeData, &bm->edata, i, &e->head.data, true);
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etable[i] = e;
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if (cd_edge_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_bweight_offset, (float)me->bweight / 255.0f);
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if (cd_edge_crease_offset != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_crease_offset, (float)me->crease / 255.0f);
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if (UNLIKELY(has_orig_htype & BM_EDGE)) {
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int *orig_index = CustomData_bmesh_get(&bm->edata, e->head.data, CD_ORIGINDEX);
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*orig_index = ORIGINDEX_NONE;
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}
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}
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if (edge_allocated) MEM_freeN(medge);
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if (is_init) bm->elem_index_dirty &= ~BM_EDGE;
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/* do faces */
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/* note: i_alt is aligned with bmesh faces which may not always align with mpolys */
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bool poly_allocated, loop_allocated;
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mpoly = mp = DM_get_poly_array(dm, &poly_allocated);
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mloop = DM_get_loop_array(dm, &loop_allocated);
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face_normals = (dm->dirty & DM_DIRTY_NORMALS) ? NULL : CustomData_get_layer(&dm->polyData, CD_NORMAL);
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for (i = 0; i < dm->numPolyData; i++, mp++) {
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BMLoop *l_iter;
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BMLoop *l_first;
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f = bm_face_create_from_mpoly(mp, mloop + mp->loopstart,
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bm, vtable, etable);
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if (UNLIKELY(f == NULL)) {
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continue;
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}
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f->head.hflag = BM_face_flag_from_mflag(mp->flag);
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BM_elem_index_set(f, bm->totface - 1); /* set_inline */
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f->mat_nr = mp->mat_nr;
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j = mp->loopstart;
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l_iter = l_first = BM_FACE_FIRST_LOOP(f);
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do {
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/* Save index of correspsonding MLoop */
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CustomData_to_bmesh_block(&dm->loopData, &bm->ldata, j, &l_iter->head.data, true);
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BM_elem_index_set(l_iter, j++); /* set_inline */
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} while ((l_iter = l_iter->next) != l_first);
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CustomData_to_bmesh_block(&dm->polyData, &bm->pdata, i, &f->head.data, true);
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if (calc_face_normal) {
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if (face_normals) {
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copy_v3_v3(f->no, face_normals[i]);
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}
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else {
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BM_face_normal_update(f);
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}
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}
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if (UNLIKELY(has_orig_htype & BM_FACE)) {
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int *orig_index = CustomData_bmesh_get(&bm->pdata, f->head.data, CD_ORIGINDEX);
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*orig_index = ORIGINDEX_NONE;
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}
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}
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if (poly_allocated) MEM_freeN(mpoly);
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if (loop_allocated) MEM_freeN(mloop);
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if (is_init) bm->elem_index_dirty &= ~(BM_FACE | BM_LOOP);
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MEM_freeN(vtable);
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MEM_freeN(etable);
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}
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/* converts a cddm to a BMEditMesh. if existing is non-NULL, the
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* new geometry will be put in there.*/
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BMEditMesh *DM_to_editbmesh(DerivedMesh *dm, BMEditMesh *existing, const bool do_tessellate)
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{
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BMEditMesh *em = existing;
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BMesh *bm;
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if (em) {
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bm = em->bm;
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}
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else {
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bm = BM_mesh_create(
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&bm_mesh_allocsize_default,
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&((struct BMeshCreateParams){.use_toolflags = false,}));
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}
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DM_to_bmesh_ex(dm, bm, do_tessellate);
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if (!em) {
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em = BKE_editmesh_create(bm, do_tessellate);
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}
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else {
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if (do_tessellate) {
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BKE_editmesh_tessface_calc(em);
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}
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}
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return em;
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}
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BMesh *DM_to_bmesh(DerivedMesh *dm, const bool calc_face_normal)
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{
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BMesh *bm;
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const BMAllocTemplate allocsize = BMALLOC_TEMPLATE_FROM_DM(dm);
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bm = BM_mesh_create(
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&allocsize,
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&((struct BMeshCreateParams){.use_toolflags = false,}));
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DM_to_bmesh_ex(dm, bm, calc_face_normal);
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return bm;
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}
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Bastien Montagne