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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
*
* Makes the mesh symmetrical by splitting along an axis and duplicating the geometry.
*/
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "bmesh.h"
#include "intern/bmesh_operators_private.h"
#define ELE_OUT 1
void bmo_symmetrize_exec(BMesh *bm, BMOperator *op)
{
const float dist = BMO_slot_float_get(op->slots_in, "dist");
const int direction = BMO_slot_int_get(op->slots_in, "direction");
const int axis = direction % 3;
BMOperator op_bisect;
BMOperator op_dupe;
BMOperator op_weld;
BMOpSlot *slot_vertmap;
BMOpSlot *slot_targetmap;
float plane_no[3];
float scale[3];
BMOIter siter;
BMVert *v;
copy_v3_fl(plane_no, 0.0f);
copy_v3_fl(scale, 1.0f);
plane_no[axis] = direction > 2 ? -1.0f : 1.0f;
scale[axis] *= -1.0f;
/* Cut in half */
BMO_op_initf(bm,
&op_bisect,
op->flag,
"bisect_plane geom=%s plane_no=%v dist=%f clear_outer=%b use_snap_center=%b",
op,
"input",
plane_no,
dist,
true,
true);
BMO_op_exec(bm, &op_bisect);
/* Duplicate */
BMO_op_initf(bm, &op_dupe, op->flag, "duplicate geom=%S", &op_bisect, "geom.out");
BMO_op_exec(bm, &op_dupe);
/* Flag for output (some will be merged) */
BMO_slot_buffer_flag_enable(bm, op_bisect.slots_out, "geom.out", BM_ALL_NOLOOP, ELE_OUT);
BMO_slot_buffer_flag_enable(bm, op_dupe.slots_out, "geom.out", BM_ALL_NOLOOP, ELE_OUT);
BMO_op_callf(bm, op->flag, "scale verts=%S vec=%v", &op_dupe, "geom.out", scale);
/* important 'flip_multires' is disabled,
* otherwise multi-res data will be reversed, see: T47788 */
BMO_op_callf(bm, op->flag, "reverse_faces faces=%S", &op_dupe, "geom.out");
/* Weld verts */
BMO_op_init(bm, &op_weld, op->flag, "weld_verts");
slot_vertmap = BMO_slot_get(op_dupe.slots_out, "vert_map.out");
slot_targetmap = BMO_slot_get(op_weld.slots_in, "targetmap");
BMO_ITER (v, &siter, op_bisect.slots_out, "geom_cut.out", BM_VERT) {
BMVert *v_dupe = BMO_slot_map_elem_get(slot_vertmap, v);
BMO_slot_map_elem_insert(&op_weld, slot_targetmap, v_dupe, v);
}
BMO_op_exec(bm, &op_weld);
/* Cleanup */
BMO_op_finish(bm, &op_weld);
BMO_op_finish(bm, &op_dupe);
BMO_op_finish(bm, &op_bisect);
/* Create output */
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "geom.out", BM_ALL_NOLOOP, ELE_OUT);
}
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