/* * ***** 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. * * Contributor(s): Campbell Barton * * ***** END GPL LICENSE BLOCK ***** */ /** \file blender/bmesh/operators/bmo_wireframe.c * \ingroup bmesh */ #include "MEM_guardedalloc.h" #include "BLI_math.h" #include "bmesh.h" #include "intern/bmesh_operators_private.h" /* own include */ BMLoop *bm_edge_tag_faceloop(BMEdge *e) { BMLoop *l, *l_first; l = l_first = e->l; do { if (BM_elem_flag_test(l->f, BM_ELEM_TAG)) { return l; } } while ((l = l->radial_next) != l_first); /* in the case this is used, we know this will never happen */ return NULL; } static void bm_vert_boundary_tangent(BMVert *v, float r_no[3], float r_no_face[3], BMVert **r_va_other, BMVert **r_vb_other) { BMIter iter; BMEdge *e_iter; BMEdge *e_a = NULL, *e_b = NULL; BMVert *v_a, *v_b; BMLoop *l_a, *l_b; float no_face[3], no_edge[3]; float tvec_a[3], tvec_b[3]; /* get 2 boundary edges, there should only _be_ 2, * in case there are more - results wont be valid of course */ BM_ITER_ELEM (e_iter, &iter, v, BM_EDGES_OF_VERT) { if (BM_elem_flag_test(e_iter, BM_ELEM_TAG)) { if (e_a == NULL) { e_a = e_iter; } else { e_b = e_iter; break; } } } l_a = bm_edge_tag_faceloop(e_a); l_b = bm_edge_tag_faceloop(e_b); /* average edge face normal */ add_v3_v3v3(no_face, l_a->f->no, l_b->f->no); /* average edge direction */ v_a = BM_edge_other_vert(e_a, v); v_b = BM_edge_other_vert(e_b, v); sub_v3_v3v3(tvec_a, v->co, v_a->co); sub_v3_v3v3(tvec_b, v_b->co, v->co); normalize_v3(tvec_a); normalize_v3(tvec_b); add_v3_v3v3(no_edge, tvec_a, tvec_b); /* not unit length but this is ok */ /* find the normal */ cross_v3_v3v3(r_no, no_edge, no_face); normalize_v3(r_no); /* check are we flipped the right way */ BM_edge_calc_face_tangent(e_a, l_a, tvec_a); BM_edge_calc_face_tangent(e_b, l_b, tvec_b); add_v3_v3(tvec_a, tvec_b); if (dot_v3v3(r_no, tvec_a) > 0.0) { negate_v3(r_no); } copy_v3_v3(r_no_face, no_face); *r_va_other = v_a; *r_vb_other = v_b; } /* check if we are the only tagged loop-face around this edge */ static int bm_loop_is_radial_boundary(BMLoop *l_first) { BMLoop *l = l_first->radial_next; if (l == l_first) { return TRUE; /* a real boundary */ } else { do { if (BM_elem_flag_test(l->f, BM_ELEM_TAG)) { return FALSE; } } while ((l = l->radial_next) != l_first); } return TRUE; } extern float BM_vert_calc_mean_tagged_edge_length(BMVert *v); void bmo_wireframe_exec(BMesh *bm, BMOperator *op) { const int use_boundary = BMO_slot_bool_get(op, "use_boundary"); const int use_even_offset = BMO_slot_bool_get(op, "use_even_offset"); const int use_relative_offset = BMO_slot_bool_get(op, "use_relative_offset"); const float depth = BMO_slot_float_get(op, "thickness"); const float inset = depth; const int totvert_orig = bm->totvert; BMOIter oiter; BMIter iter; BMIter itersub; /* filled only with boundary verts */ BMVert **verts_src = MEM_mallocN(sizeof(BMVert **) * totvert_orig, __func__); BMVert **verts_neg = MEM_mallocN(sizeof(BMVert **) * totvert_orig, __func__); BMVert **verts_pos = MEM_mallocN(sizeof(BMVert **) * totvert_orig, __func__); /* will over-alloc, but makes for easy lookups by index to keep aligned */ BMVert **verts_boundary = use_boundary ? MEM_mallocN(sizeof(BMVert **) * totvert_orig, __func__) : NULL; float *verts_relfac = use_relative_offset ? MEM_mallocN(sizeof(float) * totvert_orig, __func__) : NULL; /* may over-alloc if not all faces have wire */ BMVert **verts_loop; int verts_loop_tot = 0; BMVert *v_src; BMFace *f_src; BMLoop *l; float tvec[3]; float fac; int i; BM_mesh_elem_index_ensure(bm, BM_VERT); BM_ITER_MESH_INDEX (v_src, &iter, bm, BM_VERTS_OF_MESH, i) { BM_elem_flag_disable(v_src, BM_ELEM_TAG); verts_src[i] = v_src; } /* setup tags, all faces and verts will be tagged which will be duplicated */ BM_mesh_elem_hflag_disable_all(bm, BM_FACE, BM_ELEM_TAG, FALSE); BMO_ITER (f_src, &oiter, bm, op, "faces", BM_FACE) { verts_loop_tot += f_src->len; BM_elem_flag_enable(f_src, BM_ELEM_TAG); BM_ITER_ELEM (l, &itersub, f_src, BM_LOOPS_OF_FACE) { BM_elem_flag_enable(l->v, BM_ELEM_TAG); /* also tag boundary edges */ BM_elem_flag_set(l->e, BM_ELEM_TAG, bm_loop_is_radial_boundary(l)); } } /* duplicate tagged verts */ for (i = 0, v_src = verts_src[i]; i < totvert_orig; i++, v_src = verts_src[i]) { if (BM_elem_flag_test(v_src, BM_ELEM_TAG)) { fac = depth; if (use_relative_offset) { verts_relfac[i] = BM_vert_calc_mean_tagged_edge_length(v_src); fac *= verts_relfac[i]; } madd_v3_v3v3fl(tvec, v_src->co, v_src->no, -fac); verts_neg[i] = BM_vert_create(bm, tvec, v_src); madd_v3_v3v3fl(tvec, v_src->co, v_src->no, fac); verts_pos[i] = BM_vert_create(bm, tvec, v_src); } else { /* could skip this */ verts_src[i] = NULL; verts_neg[i] = NULL; verts_pos[i] = NULL; } /* conflicts with BM_vert_calc_mean_tagged_edge_length */ if (use_relative_offset == FALSE) { BM_elem_flag_disable(v_src, BM_ELEM_TAG); } } if (use_relative_offset) { BM_mesh_elem_hflag_disable_all(bm, BM_VERT, BM_ELEM_TAG, FALSE); } verts_loop = MEM_mallocN(sizeof(BMVert **) * verts_loop_tot, __func__); verts_loop_tot = 0; /* count up again */ BMO_ITER (f_src, &oiter, bm, op, "faces", BM_FACE) { BM_ITER_ELEM (l, &itersub, f_src, BM_LOOPS_OF_FACE) { BM_elem_index_set(l, verts_loop_tot); /* set_loop */ BM_loop_calc_face_tangent(l, tvec); /* create offset vert */ fac = inset; if (use_even_offset) { fac *= shell_angle_to_dist((M_PI - BM_loop_calc_face_angle(l)) * 0.5f); } if (use_relative_offset) { fac *= verts_relfac[BM_elem_index_get(l->v)]; } madd_v3_v3v3fl(tvec, l->v->co, tvec, fac); verts_loop[verts_loop_tot] = BM_vert_create(bm, tvec, l->v); if (use_boundary) { if (BM_elem_flag_test(l->e, BM_ELEM_TAG)) { /* is this a boundary? */ BMLoop *l_pair[2] = {l, l->next}; BM_elem_flag_enable(l->e, BM_ELEM_TAG); for (i = 0; i < 2; i++) { if (!BM_elem_flag_test(l_pair[i]->v, BM_ELEM_TAG)) { float no_face[3]; BMVert *va_other; BMVert *vb_other; BM_elem_flag_enable(l_pair[i]->v, BM_ELEM_TAG); bm_vert_boundary_tangent(l_pair[i]->v, tvec, no_face, &va_other, &vb_other); /* create offset vert */ /* similar to code above but different angle calc */ fac = inset; if (use_even_offset) { fac *= shell_angle_to_dist((M_PI - angle_on_axis_v3v3v3_v3(va_other->co, l_pair[i]->v->co, vb_other->co, no_face)) * 0.5f); } if (use_relative_offset) { fac *= verts_relfac[BM_elem_index_get(l_pair[i]->v)]; } madd_v3_v3v3fl(tvec, l_pair[i]->v->co, tvec, fac); verts_boundary[BM_elem_index_get(l_pair[i]->v)] = BM_vert_create(bm, tvec, l_pair[i]->v); } } } } verts_loop_tot++; } } BMO_ITER (f_src, &oiter, bm, op, "faces", BM_FACE) { BM_elem_flag_disable(f_src, BM_ELEM_TAG); BM_ITER_ELEM (l, &itersub, f_src, BM_LOOPS_OF_FACE) { BMFace *f_new; BMLoop *l_new; BMLoop *l_next = l->next; BMVert *v_l1 = verts_loop[BM_elem_index_get(l)]; BMVert *v_l2 = verts_loop[BM_elem_index_get(l_next)]; BMVert *v_src_l1 = l->v; BMVert *v_src_l2 = l_next->v; const int i_1 = BM_elem_index_get(v_src_l1); const int i_2 = BM_elem_index_get(v_src_l2); BMVert *v_neg1 = verts_neg[i_1]; BMVert *v_neg2 = verts_neg[i_2]; BMVert *v_pos1 = verts_pos[i_1]; BMVert *v_pos2 = verts_pos[i_2]; f_new = BM_face_create_quad_tri(bm, v_l1, v_l2, v_neg2, v_neg1, f_src, FALSE); BM_elem_flag_enable(f_new, BM_ELEM_TAG); l_new = BM_FACE_FIRST_LOOP(f_new); BM_elem_attrs_copy(bm, bm, l, l_new); BM_elem_attrs_copy(bm, bm, l, l_new->prev); BM_elem_attrs_copy(bm, bm, l_next, l_new->next); BM_elem_attrs_copy(bm, bm, l_next, l_new->next->next); f_new = BM_face_create_quad_tri(bm, v_l2, v_l1, v_pos1, v_pos2, f_src, FALSE); BM_elem_flag_enable(f_new, BM_ELEM_TAG); l_new = BM_FACE_FIRST_LOOP(f_new); BM_elem_attrs_copy(bm, bm, l_next, l_new); BM_elem_attrs_copy(bm, bm, l_next, l_new->prev); BM_elem_attrs_copy(bm, bm, l, l_new->next); BM_elem_attrs_copy(bm, bm, l, l_new->next->next); if (use_boundary) { if (BM_elem_flag_test(l->e, BM_ELEM_TAG)) { /* we know its a boundary and this is the only face user (which is being wire'd) */ /* we know we only touch this edge/face once */ BMVert *v_b1 = verts_boundary[i_1]; BMVert *v_b2 = verts_boundary[i_2]; f_new = BM_face_create_quad_tri(bm, v_b2, v_b1, v_neg1, v_neg2, f_src, FALSE); BM_elem_flag_enable(f_new, BM_ELEM_TAG); l_new = BM_FACE_FIRST_LOOP(f_new); BM_elem_attrs_copy(bm, bm, l_next, l_new); BM_elem_attrs_copy(bm, bm, l_next, l_new->prev); BM_elem_attrs_copy(bm, bm, l, l_new->next); BM_elem_attrs_copy(bm, bm, l, l_new->next->next); f_new = BM_face_create_quad_tri(bm, v_b1, v_b2, v_pos2, v_pos1, f_src, FALSE); BM_elem_flag_enable(f_new, BM_ELEM_TAG); l_new = BM_FACE_FIRST_LOOP(f_new); BM_elem_attrs_copy(bm, bm, l, l_new); BM_elem_attrs_copy(bm, bm, l, l_new->prev); BM_elem_attrs_copy(bm, bm, l_next, l_new->next); BM_elem_attrs_copy(bm, bm, l_next, l_new->next->next); } } } } if (use_boundary) { MEM_freeN(verts_boundary); } if (use_relative_offset) { MEM_freeN(verts_relfac); } MEM_freeN(verts_src); MEM_freeN(verts_neg); MEM_freeN(verts_pos); MEM_freeN(verts_loop); BMO_slot_buffer_from_enabled_hflag(bm, op, "faceout", BM_FACE, BM_ELEM_TAG); }