diff options
Diffstat (limited to 'source/blender/editors/hair/hair_mirror.c')
| -rw-r--r-- | source/blender/editors/hair/hair_mirror.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/source/blender/editors/hair/hair_mirror.c b/source/blender/editors/hair/hair_mirror.c new file mode 100644 index 00000000000..7f5b14e4b37 --- /dev/null +++ b/source/blender/editors/hair/hair_mirror.c @@ -0,0 +1,210 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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) Blender Foundation + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): Lukas Toenne + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/hair/hair_mirror.c + * \ingroup edhair + */ + +#include <stdlib.h> + +#include "MEM_guardedalloc.h" + +#include "BLI_utildefines.h" +#include "BLI_math.h" + +#include "BKE_editmesh_bvh.h" +#include "BKE_editstrands.h" + +#include "ED_physics.h" +#include "ED_util.h" + +#include "bmesh.h" + +#include "hair_intern.h" + +/* TODO use_topology is not yet implemented for strands. + * Native strand topology is not very useful for this. + * Instead, the topology of the scalp mesh should be used for finding mirrored strand roots, + * then the arc- or parametric length of a vertex from the root to find mirrored verts. + */ + +#define BM_SEARCH_MAXDIST_MIRR 0.00002f +#define BM_CD_LAYER_ID "__mirror_index" +/** + * \param edit Edit strands. + * \param use_self Allow a vertex to point to its self (middle verts). + * \param use_select Restrict to selected verts. + * \param use_topology Use topology mirror. + * \param maxdist Distance for close point test. + * \param r_index Optional array to write into, as an alternative to a customdata layer (length of total verts). + */ +void ED_strands_mirror_cache_begin_ex(BMEditStrands *edit, const int axis, const bool use_self, const bool use_select, + /* extra args */ + const bool UNUSED(use_topology), float maxdist, int *r_index) +{ + BMesh *bm = edit->bm; + BMIter iter; + BMVert *v; + int cd_vmirr_offset; + int i; + + /* one or the other is used depending if topo is enabled */ + struct BMBVHTree *tree = NULL; + + BM_mesh_elem_table_ensure(bm, BM_VERT); + + if (r_index == NULL) { + const char *layer_id = BM_CD_LAYER_ID; + edit->mirror_cdlayer = CustomData_get_named_layer_index(&bm->vdata, CD_PROP_INT, layer_id); + if (edit->mirror_cdlayer == -1) { + BM_data_layer_add_named(bm, &bm->vdata, CD_PROP_INT, layer_id); + edit->mirror_cdlayer = CustomData_get_named_layer_index(&bm->vdata, CD_PROP_INT, layer_id); + } + + cd_vmirr_offset = CustomData_get_n_offset(&bm->vdata, CD_PROP_INT, + edit->mirror_cdlayer - CustomData_get_layer_index(&bm->vdata, CD_PROP_INT)); + + bm->vdata.layers[edit->mirror_cdlayer].flag |= CD_FLAG_TEMPORARY; + } + + BM_mesh_elem_index_ensure(bm, BM_VERT); + + tree = BKE_bmbvh_new(edit->bm, NULL, 0, 0, NULL, false); + +#define VERT_INTPTR(_v, _i) r_index ? &r_index[_i] : BM_ELEM_CD_GET_VOID_P(_v, cd_vmirr_offset); + + BM_ITER_MESH_INDEX (v, &iter, bm, BM_VERTS_OF_MESH, i) { + BLI_assert(BM_elem_index_get(v) == i); + + /* temporary for testing, check for selection */ + if (use_select && !BM_elem_flag_test(v, BM_ELEM_SELECT)) { + /* do nothing */ + } + else { + BMVert *v_mirr; + float co[3]; + int *idx = VERT_INTPTR(v, i); + + copy_v3_v3(co, v->co); + co[axis] *= -1.0f; + v_mirr = BKE_bmbvh_find_vert_closest(tree, co, maxdist); + + if (v_mirr && (use_self || (v_mirr != v))) { + const int i_mirr = BM_elem_index_get(v_mirr); + *idx = i_mirr; + idx = VERT_INTPTR(v_mirr, i_mirr); + *idx = i; + } + else { + *idx = -1; + } + } + + } + +#undef VERT_INTPTR + + BKE_bmbvh_free(tree); +} + +void ED_strands_mirror_cache_begin(BMEditStrands *edit, const int axis, + const bool use_self, const bool use_select, + const bool use_topology) +{ + ED_strands_mirror_cache_begin_ex(edit, axis, + use_self, use_select, + /* extra args */ + use_topology, BM_SEARCH_MAXDIST_MIRR, NULL); +} + +BMVert *ED_strands_mirror_get(BMEditStrands *edit, BMVert *v) +{ + const int *mirr = CustomData_bmesh_get_layer_n(&edit->bm->vdata, v->head.data, edit->mirror_cdlayer); + + BLI_assert(edit->mirror_cdlayer != -1); /* invalid use */ + + if (mirr && *mirr >= 0 && *mirr < edit->bm->totvert) { + if (!edit->bm->vtable) { + printf("err: should only be called between " + "ED_strands_mirror_cache_begin and ED_strands_mirror_cache_end\n"); + return NULL; + } + + return edit->bm->vtable[*mirr]; + } + + return NULL; +} + +BMEdge *ED_strands_mirror_get_edge(BMEditStrands *edit, BMEdge *e) +{ + BMVert *v1_mirr = ED_strands_mirror_get(edit, e->v1); + if (v1_mirr) { + BMVert *v2_mirr = ED_strands_mirror_get(edit, e->v2); + if (v2_mirr) { + return BM_edge_exists(v1_mirr, v2_mirr); + } + } + + return NULL; +} + +void ED_strands_mirror_cache_clear(BMEditStrands *edit, BMVert *v) +{ + int *mirr = CustomData_bmesh_get_layer_n(&edit->bm->vdata, v->head.data, edit->mirror_cdlayer); + + BLI_assert(edit->mirror_cdlayer != -1); /* invalid use */ + + if (mirr) { + *mirr = -1; + } +} + +void ED_strands_mirror_cache_end(BMEditStrands *edit) +{ + edit->mirror_cdlayer = -1; +} + +void ED_strands_mirror_apply(BMEditStrands *edit, const int sel_from, const int sel_to) +{ + BMIter iter; + BMVert *v; + + BLI_assert((edit->bm->vtable != NULL) && ((edit->bm->elem_table_dirty & BM_VERT) == 0)); + + BM_ITER_MESH (v, &iter, edit->bm, BM_VERTS_OF_MESH) { + if (BM_elem_flag_test(v, BM_ELEM_SELECT) == sel_from) { + BMVert *mirr = ED_strands_mirror_get(edit, v); + if (mirr) { + if (BM_elem_flag_test(mirr, BM_ELEM_SELECT) == sel_to) { + copy_v3_v3(mirr->co, v->co); + mirr->co[0] *= -1.0f; + } + } + } + } +} |