514 lines
18 KiB
C
514 lines
18 KiB
C
/*
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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) Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup bke
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*/
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#include "BLI_math.h"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_object_types.h"
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#include "BKE_deform.h"
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#include "BKE_lib_id.h"
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#include "BKE_lib_query.h"
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#include "BKE_mesh.h"
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#include "BKE_mesh_mirror.h"
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#include "BKE_modifier.h"
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#include "bmesh.h"
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#include "bmesh_tools.h"
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#include "MEM_guardedalloc.h"
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#include "MOD_modifiertypes.h"
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Mesh *BKE_mesh_mirror_bisect_on_mirror_plane_for_modifier(MirrorModifierData *mmd,
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const Mesh *mesh,
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int axis,
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const float plane_co[3],
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float plane_no[3])
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{
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bool do_bisect_flip_axis = ((axis == 0 && mmd->flag & MOD_MIR_BISECT_FLIP_AXIS_X) ||
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(axis == 1 && mmd->flag & MOD_MIR_BISECT_FLIP_AXIS_Y) ||
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(axis == 2 && mmd->flag & MOD_MIR_BISECT_FLIP_AXIS_Z));
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const float bisect_distance = mmd->bisect_threshold;
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Mesh *result;
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BMesh *bm;
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BMIter viter;
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BMVert *v, *v_next;
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bm = BKE_mesh_to_bmesh_ex(mesh,
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&(struct BMeshCreateParams){0},
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&(struct BMeshFromMeshParams){
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.calc_face_normal = true,
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.cd_mask_extra = {.vmask = CD_MASK_ORIGINDEX,
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.emask = CD_MASK_ORIGINDEX,
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.pmask = CD_MASK_ORIGINDEX},
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});
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/* Define bisecting plane (aka mirror plane). */
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float plane[4];
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if (!do_bisect_flip_axis) {
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/* That reversed condition is a little weird, but for some reason that's how you keep
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* the part of the mesh which is on the non-mirrored side when flip option is disabled.
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* I think this is the expected behavior. */
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negate_v3(plane_no);
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}
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plane_from_point_normal_v3(plane, plane_co, plane_no);
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BM_mesh_bisect_plane(bm, plane, true, false, 0, 0, bisect_distance);
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/* Plane definitions for vert killing. */
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float plane_offset[4];
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copy_v3_v3(plane_offset, plane);
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plane_offset[3] = plane[3] - bisect_distance;
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/* Delete verts across the mirror plane. */
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BM_ITER_MESH_MUTABLE (v, v_next, &viter, bm, BM_VERTS_OF_MESH) {
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if (plane_point_side_v3(plane_offset, v->co) > 0.0f) {
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BM_vert_kill(bm, v);
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}
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}
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result = BKE_mesh_from_bmesh_for_eval_nomain(bm, NULL, mesh);
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BM_mesh_free(bm);
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return result;
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}
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void BKE_mesh_mirror_apply_mirror_on_axis(struct Main *bmain,
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Mesh *mesh,
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const int axis,
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const float dist)
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{
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BMesh *bm = BKE_mesh_to_bmesh_ex(mesh,
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&(struct BMeshCreateParams){
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.use_toolflags = 1,
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},
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&(struct BMeshFromMeshParams){
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.calc_face_normal = true,
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.cd_mask_extra =
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{
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.vmask = CD_MASK_SHAPEKEY,
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},
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});
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BMO_op_callf(bm,
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(BMO_FLAG_DEFAULTS & ~BMO_FLAG_RESPECT_HIDE),
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"symmetrize input=%avef direction=%i dist=%f use_shapekey=%b",
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axis,
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dist,
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true);
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BM_mesh_bm_to_me(bmain,
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bm,
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mesh,
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(&(struct BMeshToMeshParams){
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.calc_object_remap = true,
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}));
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BM_mesh_free(bm);
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}
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/**
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* \warning This should _not_ be used to modify original meshes since
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* it doesn't handle shape-keys, use #BKE_mesh_mirror_apply_mirror_on_axis instead.
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*/
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Mesh *BKE_mesh_mirror_apply_mirror_on_axis_for_modifier(MirrorModifierData *mmd,
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Object *ob,
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const Mesh *mesh,
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const int axis,
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const bool use_correct_order_on_merge)
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{
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const float tolerance_sq = mmd->tolerance * mmd->tolerance;
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const bool do_vtargetmap = (mmd->flag & MOD_MIR_NO_MERGE) == 0;
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int tot_vtargetmap = 0; /* total merge vertices */
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const bool do_bisect = ((axis == 0 && mmd->flag & MOD_MIR_BISECT_AXIS_X) ||
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(axis == 1 && mmd->flag & MOD_MIR_BISECT_AXIS_Y) ||
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(axis == 2 && mmd->flag & MOD_MIR_BISECT_AXIS_Z));
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Mesh *result;
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MVert *mv, *mv_prev;
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MEdge *me;
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MLoop *ml;
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MPoly *mp;
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float mtx[4][4];
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float plane_co[3], plane_no[3];
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int i;
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int a, totshape;
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int *vtargetmap = NULL, *vtmap_a = NULL, *vtmap_b = NULL;
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/* mtx is the mirror transformation */
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unit_m4(mtx);
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mtx[axis][axis] = -1.0f;
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Object *mirror_ob = mmd->mirror_ob;
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if (mirror_ob != NULL) {
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float tmp[4][4];
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float itmp[4][4];
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/* tmp is a transform from coords relative to the object's own origin,
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* to coords relative to the mirror object origin */
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invert_m4_m4(tmp, mirror_ob->obmat);
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mul_m4_m4m4(tmp, tmp, ob->obmat);
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/* itmp is the reverse transform back to origin-relative coordinates */
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invert_m4_m4(itmp, tmp);
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/* combine matrices to get a single matrix that translates coordinates into
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* mirror-object-relative space, does the mirror, and translates back to
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* origin-relative space */
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mul_m4_series(mtx, itmp, mtx, tmp);
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if (do_bisect) {
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copy_v3_v3(plane_co, itmp[3]);
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copy_v3_v3(plane_no, itmp[axis]);
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/* Account for non-uniform scale in `ob`, see: T87592. */
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float ob_scale[3] = {
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len_squared_v3(ob->obmat[0]),
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len_squared_v3(ob->obmat[1]),
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len_squared_v3(ob->obmat[2]),
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};
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/* Scale to avoid precision loss with extreme values. */
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const float ob_scale_max = max_fff(UNPACK3(ob_scale));
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if (LIKELY(ob_scale_max != 0.0f)) {
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mul_v3_fl(ob_scale, 1.0f / ob_scale_max);
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mul_v3_v3(plane_no, ob_scale);
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}
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}
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}
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else if (do_bisect) {
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copy_v3_v3(plane_co, mtx[3]);
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/* Need to negate here, since that axis is inverted (for mirror transform). */
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negate_v3_v3(plane_no, mtx[axis]);
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}
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Mesh *mesh_bisect = NULL;
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if (do_bisect) {
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mesh_bisect = BKE_mesh_mirror_bisect_on_mirror_plane_for_modifier(
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mmd, mesh, axis, plane_co, plane_no);
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mesh = mesh_bisect;
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}
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const int maxVerts = mesh->totvert;
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const int maxEdges = mesh->totedge;
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const int maxLoops = mesh->totloop;
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const int maxPolys = mesh->totpoly;
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result = BKE_mesh_new_nomain_from_template(
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mesh, maxVerts * 2, maxEdges * 2, 0, maxLoops * 2, maxPolys * 2);
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/* Copy custom-data to original geometry. */
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CustomData_copy_data(&mesh->vdata, &result->vdata, 0, 0, maxVerts);
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CustomData_copy_data(&mesh->edata, &result->edata, 0, 0, maxEdges);
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CustomData_copy_data(&mesh->ldata, &result->ldata, 0, 0, maxLoops);
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CustomData_copy_data(&mesh->pdata, &result->pdata, 0, 0, maxPolys);
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/* Subsurf for eg won't have mesh data in the custom-data arrays.
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* now add mvert/medge/mpoly layers. */
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if (!CustomData_has_layer(&mesh->vdata, CD_MVERT)) {
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memcpy(result->mvert, mesh->mvert, sizeof(*result->mvert) * mesh->totvert);
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}
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if (!CustomData_has_layer(&mesh->edata, CD_MEDGE)) {
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memcpy(result->medge, mesh->medge, sizeof(*result->medge) * mesh->totedge);
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}
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if (!CustomData_has_layer(&mesh->pdata, CD_MPOLY)) {
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memcpy(result->mloop, mesh->mloop, sizeof(*result->mloop) * mesh->totloop);
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memcpy(result->mpoly, mesh->mpoly, sizeof(*result->mpoly) * mesh->totpoly);
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}
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/* Copy custom-data to new geometry,
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* copy from its self because this data may have been created in the checks above. */
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CustomData_copy_data(&result->vdata, &result->vdata, 0, maxVerts, maxVerts);
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CustomData_copy_data(&result->edata, &result->edata, 0, maxEdges, maxEdges);
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/* loops are copied later */
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CustomData_copy_data(&result->pdata, &result->pdata, 0, maxPolys, maxPolys);
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if (do_vtargetmap) {
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/* second half is filled with -1 */
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vtargetmap = MEM_malloc_arrayN(maxVerts, sizeof(int[2]), "MOD_mirror tarmap");
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vtmap_a = vtargetmap;
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vtmap_b = vtargetmap + maxVerts;
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}
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/* mirror vertex coordinates */
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mv_prev = result->mvert;
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mv = mv_prev + maxVerts;
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for (i = 0; i < maxVerts; i++, mv++, mv_prev++) {
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mul_m4_v3(mtx, mv->co);
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if (do_vtargetmap) {
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/* Compare location of the original and mirrored vertex,
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* to see if they should be mapped for merging.
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*
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* Always merge from the copied into the original vertices so it's possible to
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* generate a 1:1 mapping by scanning vertices from the beginning of the array
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* as is done in #BKE_editmesh_vert_coords_when_deformed. Without this,
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* the coordinates returned will sometimes point to the copied vertex locations, see:
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* T91444.
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*
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* However, such a change also affects non-versionable things like some modifiers binding, so
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* we cannot enforce that behavior on existing modifiers, in which case we keep using the
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* old, incorrect behavior of merging the source vertex into its copy.
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*/
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if (use_correct_order_on_merge) {
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if (UNLIKELY(len_squared_v3v3(mv_prev->co, mv->co) < tolerance_sq)) {
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*vtmap_b = i;
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tot_vtargetmap++;
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/* average location */
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mid_v3_v3v3(mv->co, mv_prev->co, mv->co);
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copy_v3_v3(mv_prev->co, mv->co);
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}
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else {
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*vtmap_b = -1;
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}
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/* Fill here to avoid 2x loops. */
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*vtmap_a = -1;
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}
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else {
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if (UNLIKELY(len_squared_v3v3(mv_prev->co, mv->co) < tolerance_sq)) {
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*vtmap_a = maxVerts + i;
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tot_vtargetmap++;
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/* average location */
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mid_v3_v3v3(mv->co, mv_prev->co, mv->co);
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copy_v3_v3(mv_prev->co, mv->co);
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}
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else {
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*vtmap_a = -1;
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}
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/* Fill here to avoid 2x loops. */
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*vtmap_b = -1;
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}
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vtmap_a++;
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vtmap_b++;
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}
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}
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/* handle shape keys */
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totshape = CustomData_number_of_layers(&result->vdata, CD_SHAPEKEY);
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for (a = 0; a < totshape; a++) {
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float(*cos)[3] = CustomData_get_layer_n(&result->vdata, CD_SHAPEKEY, a);
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for (i = maxVerts; i < result->totvert; i++) {
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mul_m4_v3(mtx, cos[i]);
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}
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}
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/* adjust mirrored edge vertex indices */
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me = result->medge + maxEdges;
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for (i = 0; i < maxEdges; i++, me++) {
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me->v1 += maxVerts;
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me->v2 += maxVerts;
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}
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/* adjust mirrored poly loopstart indices, and reverse loop order (normals) */
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mp = result->mpoly + maxPolys;
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ml = result->mloop;
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for (i = 0; i < maxPolys; i++, mp++) {
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MLoop *ml2;
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int j, e;
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/* reverse the loop, but we keep the first vertex in the face the same,
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* to ensure that quads are split the same way as on the other side */
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CustomData_copy_data(
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&result->ldata, &result->ldata, mp->loopstart, mp->loopstart + maxLoops, 1);
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for (j = 1; j < mp->totloop; j++) {
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CustomData_copy_data(&result->ldata,
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&result->ldata,
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mp->loopstart + j,
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mp->loopstart + maxLoops + mp->totloop - j,
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1);
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}
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ml2 = ml + mp->loopstart + maxLoops;
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e = ml2[0].e;
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for (j = 0; j < mp->totloop - 1; j++) {
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ml2[j].e = ml2[j + 1].e;
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}
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ml2[mp->totloop - 1].e = e;
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mp->loopstart += maxLoops;
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}
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/* adjust mirrored loop vertex and edge indices */
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ml = result->mloop + maxLoops;
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for (i = 0; i < maxLoops; i++, ml++) {
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ml->v += maxVerts;
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ml->e += maxEdges;
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}
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/* handle uvs,
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* let tessface recalc handle updating the MTFace data */
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if (mmd->flag & (MOD_MIR_MIRROR_U | MOD_MIR_MIRROR_V) ||
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(is_zero_v2(mmd->uv_offset_copy) == false)) {
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const bool do_mirr_u = (mmd->flag & MOD_MIR_MIRROR_U) != 0;
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const bool do_mirr_v = (mmd->flag & MOD_MIR_MIRROR_V) != 0;
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/* If set, flip around center of each tile. */
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const bool do_mirr_udim = (mmd->flag & MOD_MIR_MIRROR_UDIM) != 0;
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const int totuv = CustomData_number_of_layers(&result->ldata, CD_MLOOPUV);
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for (a = 0; a < totuv; a++) {
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MLoopUV *dmloopuv = CustomData_get_layer_n(&result->ldata, CD_MLOOPUV, a);
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int j = maxLoops;
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dmloopuv += j; /* second set of loops only */
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for (; j-- > 0; dmloopuv++) {
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if (do_mirr_u) {
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float u = dmloopuv->uv[0];
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if (do_mirr_udim) {
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dmloopuv->uv[0] = ceilf(u) - fmodf(u, 1.0f) + mmd->uv_offset[0];
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}
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else {
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dmloopuv->uv[0] = 1.0f - u + mmd->uv_offset[0];
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}
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}
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if (do_mirr_v) {
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float v = dmloopuv->uv[1];
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if (do_mirr_udim) {
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dmloopuv->uv[1] = ceilf(v) - fmodf(v, 1.0f) + mmd->uv_offset[1];
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}
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else {
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dmloopuv->uv[1] = 1.0f - v + mmd->uv_offset[1];
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}
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}
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dmloopuv->uv[0] += mmd->uv_offset_copy[0];
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dmloopuv->uv[1] += mmd->uv_offset_copy[1];
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}
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}
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}
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/* handle custom split normals */
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if (ob->type == OB_MESH && (((Mesh *)ob->data)->flag & ME_AUTOSMOOTH) &&
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CustomData_has_layer(&result->ldata, CD_CUSTOMLOOPNORMAL)) {
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const int totloop = result->totloop;
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const int totpoly = result->totpoly;
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float(*loop_normals)[3] = MEM_calloc_arrayN((size_t)totloop, sizeof(*loop_normals), __func__);
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CustomData *ldata = &result->ldata;
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short(*clnors)[2] = CustomData_get_layer(ldata, CD_CUSTOMLOOPNORMAL);
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MLoopNorSpaceArray lnors_spacearr = {NULL};
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float(*poly_normals)[3] = MEM_mallocN(sizeof(*poly_normals) * totpoly, __func__);
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/* The transform matrix of a normal must be
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* the transpose of inverse of transform matrix of the geometry... */
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float mtx_nor[4][4];
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invert_m4_m4(mtx_nor, mtx);
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transpose_m4(mtx_nor);
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/* calculate custom normals into loop_normals, then mirror first half into second half */
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BKE_mesh_calc_normals_poly_and_vertex(result->mvert,
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result->totvert,
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result->mloop,
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totloop,
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result->mpoly,
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totpoly,
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poly_normals,
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NULL);
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BKE_mesh_normals_loop_split(result->mvert,
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result->totvert,
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result->medge,
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result->totedge,
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result->mloop,
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loop_normals,
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totloop,
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result->mpoly,
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poly_normals,
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totpoly,
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true,
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mesh->smoothresh,
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&lnors_spacearr,
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clnors,
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NULL);
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/* mirroring has to account for loops being reversed in polys in second half */
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mp = result->mpoly;
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for (i = 0; i < maxPolys; i++, mp++) {
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MPoly *mpmirror = result->mpoly + maxPolys + i;
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int j;
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for (j = mp->loopstart; j < mp->loopstart + mp->totloop; j++) {
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|
int mirrorj = mpmirror->loopstart;
|
|
if (j > mp->loopstart) {
|
|
mirrorj += mpmirror->totloop - (j - mp->loopstart);
|
|
}
|
|
copy_v3_v3(loop_normals[mirrorj], loop_normals[j]);
|
|
mul_m4_v3(mtx_nor, loop_normals[mirrorj]);
|
|
BKE_lnor_space_custom_normal_to_data(
|
|
lnors_spacearr.lspacearr[mirrorj], loop_normals[mirrorj], clnors[mirrorj]);
|
|
}
|
|
}
|
|
|
|
MEM_freeN(poly_normals);
|
|
MEM_freeN(loop_normals);
|
|
BKE_lnor_spacearr_free(&lnors_spacearr);
|
|
}
|
|
|
|
/* handle vgroup stuff */
|
|
if ((mmd->flag & MOD_MIR_VGROUP) && CustomData_has_layer(&result->vdata, CD_MDEFORMVERT)) {
|
|
MDeformVert *dvert = (MDeformVert *)CustomData_get_layer(&result->vdata, CD_MDEFORMVERT) +
|
|
maxVerts;
|
|
int *flip_map = NULL, flip_map_len = 0;
|
|
|
|
flip_map = BKE_object_defgroup_flip_map(ob, &flip_map_len, false);
|
|
|
|
if (flip_map) {
|
|
for (i = 0; i < maxVerts; dvert++, i++) {
|
|
/* merged vertices get both groups, others get flipped */
|
|
if (do_vtargetmap && (vtargetmap[i] != -1)) {
|
|
BKE_defvert_flip_merged(dvert, flip_map, flip_map_len);
|
|
}
|
|
else {
|
|
BKE_defvert_flip(dvert, flip_map, flip_map_len);
|
|
}
|
|
}
|
|
|
|
MEM_freeN(flip_map);
|
|
}
|
|
}
|
|
|
|
if (do_vtargetmap) {
|
|
/* slow - so only call if one or more merge verts are found,
|
|
* users may leave this on and not realize there is nothing to merge - campbell */
|
|
if (tot_vtargetmap) {
|
|
result = BKE_mesh_merge_verts(
|
|
result, vtargetmap, tot_vtargetmap, MESH_MERGE_VERTS_DUMP_IF_MAPPED);
|
|
}
|
|
MEM_freeN(vtargetmap);
|
|
}
|
|
|
|
if (mesh_bisect != NULL) {
|
|
BKE_id_free(NULL, mesh_bisect);
|
|
}
|
|
|
|
return result;
|
|
}
|