copying bmesh dir on its own from bmesh branch

1 files changed, 219 insertions, 0 deletions

diff --git a/source/blender/bmesh/operators/bmo_triangulate.c b/source/blender/bmesh/operators/bmo_triangulate.c
new file mode 100644
index 00000000000..90efe0b6e44
--- /dev/null
+++ b/source/blender/bmesh/operators/bmo_triangulate.c
@@ -0,0 +1,219 @@
+/*
+ * ***** 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): Joseph Eagar.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_scanfill.h"
+#include "BLI_math.h"
+#include "BLI_array.h"
+#include "BLI_editVert.h"
+#include "BLI_smallhash.h"
+
+#include "bmesh.h"
+#include "bmesh_private.h"
+
+#include "bmesh_operators_private.h" /* own include */
+
+#define EDGE_NEW	1
+#define FACE_NEW	1
+
+#define ELE_NEW		1
+#define FACE_MARK	2
+#define EDGE_MARK	4
+
+void triangulate_exec(BMesh *bm, BMOperator *op)
+{
+	BMOIter siter;
+	BMFace *face, **newfaces = NULL;
+	BLI_array_declare(newfaces);
+	float (*projectverts)[3] = NULL;
+	BLI_array_declare(projectverts);
+	int i, lastlen = 0 /* , count = 0 */;
+	
+	face = BMO_iter_new(&siter, bm, op, "faces", BM_FACE);
+	for ( ; face; face = BMO_iter_step(&siter)) {
+		if (lastlen < face->len) {
+			BLI_array_empty(projectverts);
+			BLI_array_empty(newfaces);
+			for (lastlen = 0; lastlen < face->len; lastlen++) {
+				BLI_array_growone(projectverts);
+				BLI_array_growone(projectverts);
+				BLI_array_growone(projectverts);
+				BLI_array_growone(newfaces);
+			}
+		}
+
+		BM_face_triangulate(bm, face, projectverts, EDGE_NEW, FACE_NEW, newfaces);
+
+		BMO_slot_map_ptr_insert(bm, op, "facemap", face, face);
+		for (i = 0; newfaces[i]; i++) {
+			BMO_slot_map_ptr_insert(bm, op, "facemap",
+			                        newfaces[i], face);
+
+		}
+	}
+	
+	BMO_slot_from_flag(bm, op, "edgeout", EDGE_NEW, BM_EDGE);
+	BMO_slot_from_flag(bm, op, "faceout", FACE_NEW, BM_FACE);
+	
+	BLI_array_free(projectverts);
+	BLI_array_free(newfaces);
+}
+
+void bmesh_beautify_fill_exec(BMesh *bm, BMOperator *op)
+{
+	BMOIter siter;
+	BMIter iter;
+	BMFace *f;
+	BMEdge *e;
+	int stop = 0;
+	
+	BMO_slot_buffer_flag_enable(bm, op, "constrain_edges", EDGE_MARK, BM_EDGE);
+	
+	BMO_ITER(f, &siter, bm, op, "faces", BM_FACE) {
+		if (f->len == 3)
+			BMO_elem_flag_enable(bm, f, FACE_MARK);
+	}
+
+	while (!stop) {
+		stop = 1;
+		
+		BM_ITER(e, &iter, bm, BM_EDGES_OF_MESH, NULL) {
+			BMVert *v1, *v2, *v3, *v4;
+			
+			if (BM_edge_face_count(e) != 2 || BMO_elem_flag_test(bm, e, EDGE_MARK)) {
+				continue;
+			}
+
+			if (!BMO_elem_flag_test(bm, e->l->f, FACE_MARK) ||
+			    !BMO_elem_flag_test(bm, e->l->radial_next->f, FACE_MARK))
+			{
+				continue;
+			}
+			
+			v1 = e->l->prev->v;
+			v2 = e->l->v;
+			v3 = e->l->radial_next->prev->v;
+			v4 = e->l->next->v;
+			
+			if (is_quad_convex_v3(v1->co, v2->co, v3->co, v4->co)) {
+				float len1, len2, len3, len4, len5, len6, opp1, opp2, fac1, fac2;
+				/* testing rule:
+				* the area divided by the total edge lengths
+				*/
+				len1 = len_v3v3(v1->co, v2->co);
+				len2 = len_v3v3(v2->co, v3->co);
+				len3 = len_v3v3(v3->co, v4->co);
+				len4 = len_v3v3(v4->co, v1->co);
+				len5 = len_v3v3(v1->co, v3->co);
+				len6 = len_v3v3(v2->co, v4->co);
+
+				opp1 = area_tri_v3(v1->co, v2->co, v3->co);
+				opp2 = area_tri_v3(v1->co, v3->co, v4->co);
+
+				fac1 = opp1 / (len1 + len2 + len5) + opp2 / (len3 + len4 + len5);
+
+				opp1 = area_tri_v3(v2->co, v3->co, v4->co);
+				opp2 = area_tri_v3(v2->co, v4->co, v1->co);
+
+				fac2 = opp1 / (len2 + len3 + len6) + opp2 / (len4 + len1 + len6);
+				
+				if (fac1 > fac2) {
+					e = BM_edge_rotate(bm, e, 0);
+					if (e) {
+						BMO_elem_flag_enable(bm, e, ELE_NEW);
+
+						BMO_elem_flag_enable(bm, e->l->f, FACE_MARK|ELE_NEW);
+						BMO_elem_flag_enable(bm, e->l->radial_next->f, FACE_MARK|ELE_NEW);
+						stop = 0;
+					}
+				}
+			}
+		}
+	}
+	
+	BMO_slot_from_flag(bm, op, "geomout", ELE_NEW, BM_EDGE|BM_FACE);
+}
+
+void bmesh_triangle_fill_exec(BMesh *bm, BMOperator *op)
+{
+	BMOIter siter;
+	BMEdge *e;
+	BMOperator bmop;
+	EditEdge *eed;
+	EditVert *eve, *v1, *v2;
+	EditFace *efa;
+	SmallHash hash;
+
+	BLI_smallhash_init(&hash);
+	
+	BLI_begin_edgefill();
+	
+	BMO_ITER(e, &siter, bm, op, "edges", BM_EDGE) {
+		BMO_elem_flag_enable(bm, e, EDGE_MARK);
+		
+		if (!BLI_smallhash_haskey(&hash, (uintptr_t)e->v1)) {
+			eve = BLI_addfillvert(e->v1->co);
+			eve->tmp.p = e->v1;
+			BLI_smallhash_insert(&hash, (uintptr_t)e->v1, eve);
+		}
+		
+		if (!BLI_smallhash_haskey(&hash, (uintptr_t)e->v2)) {
+			eve = BLI_addfillvert(e->v2->co);
+			eve->tmp.p = e->v2;
+			BLI_smallhash_insert(&hash, (uintptr_t)e->v2, eve);
+		}
+		
+		v1 = BLI_smallhash_lookup(&hash, (uintptr_t)e->v1);
+		v2 = BLI_smallhash_lookup(&hash, (uintptr_t)e->v2);
+		eed = BLI_addfilledge(v1, v2);
+		eed->tmp.p = e;
+	}
+	
+	BLI_edgefill(0);
+	
+	for (efa = fillfacebase.first; efa; efa = efa->next) {
+		BMFace *f = BM_face_create_quad_tri(bm,
+		                                    efa->v1->tmp.p, efa->v2->tmp.p, efa->v3->tmp.p, NULL,
+		                                    NULL, TRUE);
+		BMLoop *l;
+		BMIter liter;
+		
+		BMO_elem_flag_enable(bm, f, ELE_NEW);
+		BM_ITER(l, &liter, bm, BM_LOOPS_OF_FACE, f) {
+			if (!BMO_elem_flag_test(bm, l->e, EDGE_MARK)) {
+				BMO_elem_flag_enable(bm, l->e, ELE_NEW);
+			}
+		}
+	}
+	
+	BLI_end_edgefill();
+	BLI_smallhash_release(&hash);
+	
+	/* clean up fill */
+	BMO_op_initf(bm, &bmop, "beautify_fill faces=%ff constrain_edges=%fe", ELE_NEW, EDGE_MARK);
+	BMO_op_exec(bm, &bmop);
+	BMO_slot_buffer_flag_enable(bm, &bmop, "geomout", ELE_NEW, BM_FACE|BM_EDGE);
+	BMO_op_finish(bm, &bmop);
+	
+	BMO_slot_from_flag(bm, op, "geomout", ELE_NEW, BM_EDGE|BM_FACE);
+}