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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.
*/
/** \file
* \ingroup bmesh
*
* Beautify the mesh by rotating edges between triangles
* to more attractive positions until no more rotations can be made.
*/
#include "BLI_math.h"
#include "MEM_guardedalloc.h"
#include "bmesh.h"
#include "bmesh_tools.h"
#include "intern/bmesh_operators_private.h"
#define ELE_NEW 1
#define FACE_MARK 2
void bmo_beautify_fill_exec(BMesh *bm, BMOperator *op)
{
BMIter iter;
BMOIter siter;
BMFace *f;
BMEdge *e;
const bool use_restrict_tag = BMO_slot_bool_get(op->slots_in, "use_restrict_tag");
const short flag =
((use_restrict_tag ? VERT_RESTRICT_TAG : 0) |
/* Enable to avoid iterative edge rotation to cause the direction of faces to flip. */
EDGE_RESTRICT_DEGENERATE);
const short method = (short)BMO_slot_int_get(op->slots_in, "method");
BMEdge **edge_array;
int edge_array_len = 0;
BMO_ITER (f, &siter, op->slots_in, "faces", BM_FACE) {
if (f->len == 3) {
BMO_face_flag_enable(bm, f, FACE_MARK);
}
}
BM_ITER_MESH (e, &iter, bm, BM_EDGES_OF_MESH) {
BM_elem_flag_disable(e, BM_ELEM_TAG);
}
/* will over alloc if some edges can't be rotated */
edge_array = MEM_mallocN(
sizeof(*edge_array) * (size_t)BMO_slot_buffer_count(op->slots_in, "edges"), __func__);
BMO_ITER (e, &siter, op->slots_in, "edges", BM_EDGE) {
/* edge is manifold and can be rotated */
if (BM_edge_rotate_check(e) &&
/* faces are tagged */
BMO_face_flag_test(bm, e->l->f, FACE_MARK) &&
BMO_face_flag_test(bm, e->l->radial_next->f, FACE_MARK)) {
edge_array[edge_array_len] = e;
edge_array_len++;
}
}
BM_mesh_beautify_fill(
bm, edge_array, edge_array_len, flag, method, ELE_NEW, FACE_MARK | ELE_NEW);
MEM_freeN(edge_array);
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "geom.out", BM_EDGE | BM_FACE, ELE_NEW);
}
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