5 def make_edge_key(i1, i2):
6 return (min(i1, i2), max(i1, i2))
9 def __init__(self, me):
10 if me.__class__==Edge:
11 self._medge = me._medge
12 self.vertices = me.vertices[:]
13 self.smooth = me.smooth
20 def __getattr__(self, attr):
21 return getattr(self._medge, attr)
23 def check_smooth(self, limit):
24 if len(self.faces)!=2:
27 d = self.faces[0].normal.dot(self.faces[1].normal)
28 self.smooth = ((d>limit and self.faces[0].use_smooth and self.faces[1].use_smooth) or d>0.99995)
30 def other_face(self, f):
31 if f.index==self.faces[0].index:
32 if len(self.faces)>=2:
39 def other_vertex(self, v):
40 if v.index==self.vertices[0].index:
41 return self.vertices[1]
43 return self.vertices[0]
47 def __init__(self, mv):
48 if mv.__class__==Vertex:
49 self._mvert = mv._mvert
60 self.normal = mv.normal
64 self.groups = mv.groups[:]
66 def __getattr__(self, attr):
67 return getattr(self._mvert, attr)
69 def __cmp__(self, other):
72 return cmp(self.index, other.index)
76 def __init__(self, base):
78 self.group = base.group
79 self.weight = base.weight
81 def __getattr__(self, attr):
82 return getattr(self._mvert, attr)
86 def __init__(self, mf):
90 self.vertices = mf.vertices[:]
94 def __getattr__(self, attr):
95 return getattr(self._mface, attr)
97 def __cmp__(self, other):
100 return cmp(self.index, other.index)
102 def pivot_vertices(self, *vt):
103 flags = [(v in vt) for v in self.vertices]
104 l = len(self.vertices)
106 if flags[i] and not flags[(i+l-1)%l]:
107 return self.vertices[i:]+self.vertices[:i]
109 def get_edge(self, v1, v2):
110 key = make_edge_key(v1.index, v2.index)
114 raise KeyError("No edge %s"%(key,))
116 def other_edge(self, e, v):
118 if d!=e and v in d.vertices:
121 def get_neighbors(self):
122 neighbors = [e.other_face(self) for e in self.edges]
123 return list(filter(bool, neighbors))
127 def __init__(self, e):
129 self.vertices = e.vertices[:]
134 def __init__(self, arg):
141 self.uvs = [d.uv for d in self.data]
146 dot = self.name.find('.')
148 ext = self.name[dot:]
149 if ext.startswith(".unit") and ext[5:].isdigit():
150 self.unit = int(ext[5:])
154 def __getattr__(self, attr):
155 return getattr(self._layer, attr)
159 def __init__(self, m):
162 self.winding_test = m.winding_test
163 self.tbn_vecs = m.tbn_vecs
164 self.vertex_groups = m.vertex_groups
166 self.vertices = [Vertex(v) for v in self.vertices]
167 self.faces = [Face(f) for f in self.polygons]
168 self.edges = [Edge(e) for e in self.edges]
169 self.edge_map = {e.key: e for e in self.edges}
170 self.loops = self.loops[:]
172 self.materials = self.materials[:]
173 if self.use_uv=='NONE':
176 self.uv_layers = [UvLayer(u) for u in self.uv_layers]
177 self.uv_layers = sorted([u for u in self.uv_layers if not u.hidden], key=(lambda u: (u.unit or 1000, u.name)))
179 if self.use_uv=='UNIT0':
180 self.uv_layers = [self.uv_layers[0]]
182 next_unit = max((u.unit+1 for u in self.uv_layers if u.unit is not None), default=0)
183 for u in self.uv_layers:
188 for v in self.vertices:
189 v.groups = [VertexGroup(g) for g in v.groups]
192 if len(f.vertices)>4:
193 raise ValueError("Ngons are not supported")
195 f.vertices = [self.vertices[i] for i in f.vertices]
199 for k in f.edge_keys:
205 e.vertices = [self.vertices[i] for i in e.vertices]
210 self.lines = [Line(e) for e in self.edges if not e.faces]
214 def __getattr__(self, attr):
215 return getattr(self._mesh, attr)
217 def transform(self, matrix):
218 for v in self.vertices:
221 def splice(self, other):
222 if len(self.uv_layers)!=len(other.uv_layers):
223 raise ValueError("Meshes have incompatible UV layers")
224 for i, u in enumerate(self.uv_layers):
225 if u.name!=other.uv_layers[i].name:
226 raise ValueError("Meshes have incompatible UV layers")
229 for m in other.materials:
230 if m in self.materials:
231 material_map.append(self.materials.index(m))
233 material_map.append(len(self.materials))
234 self.materials.append(m)
236 for i, u in enumerate(self.uv_layers):
237 u.uvs += other.uv_layers[i].uvs
239 offset = len(self.vertices)
240 self.vertices += other.vertices
241 for v in self.vertices[offset:]:
244 loop_offset = len(self.loops)
245 self.loops += other.loops
247 offset = len(self.faces)
248 self.faces += other.faces
249 for f in self.faces[offset:]:
251 f.loop_start += loop_offset
252 f.loop_indices = range(f.loop_start, f.loop_start+f.loop_total)
254 f.material_index = material_map[f.material_index]
256 offset = len(self.edges)
257 self.edges += other.edges
258 for e in self.edges[offset:]:
260 e.key = make_edge_key(e.vertices[0].index, e.vertices[1].index)
261 self.edge_map[e.key] = e
263 self.lines += other.lines
265 def prepare_smoothing(self, progress=None):
267 if self.smoothing=='NONE':
272 elif self.use_auto_smooth:
273 smooth_limit = math.cos(self.auto_smooth_angle)
276 e.check_smooth(smooth_limit)
278 self.split_vertices(self.find_smooth_group, progress)
280 if self.smoothing!='BLENDER':
281 self.compute_normals()
283 def prepare_vertex_groups(self, obj):
284 for v in self.vertices:
286 weight_sum = sum(g.weight for g in v.groups)
287 v.groups = sorted(v.groups, key=(lambda g: g.weight), reverse=True)[:self.max_groups_per_vertex]
288 weight_scale = weight_sum/sum(g.weight for g in v.groups)
290 g.weight *= weight_scale
292 if obj.parent and obj.parent.type=="ARMATURE":
293 armature = obj.parent.data
294 bone_indices = {b.name: i for i, b in enumerate(armature.bones)}
295 group_index_map = {i: i for i in range(len(obj.vertex_groups))}
296 for g in first_obj.vertex_groups:
297 if g.name in bone_indices:
298 group_index_map[g.index] = bone_indices[g.name]
300 for v in self.vertices:
302 g.group = group_index_map[g.group]
304 def prepare_uv(self, obj, progress=None):
305 if obj.material_tex and self.use_uv!='NONE':
306 layer = UvLayer("material_tex")
308 if self.use_uv=='UNIT0':
309 self.uv_layers = [layer]
312 self.uv_layers.append(layer)
313 layer.unit = max((u.unit+1 for u in self.uv_layers if u.unit is not None), default=0)
315 layer.uvs = [None]*len(self.loops)
317 uv = mathutils.Vector(((f.material_index+0.5)/len(self.materials), 0.5))
318 for i in f.loop_indices:
321 array_uv_layers = [t.uv_layer for m in self.materials if m.array_atlas for t in m.texture_slots if t and t.texture_coords=='UV']
322 array_uv_layers = [u for u in self.uv_layers if u.name in array_uv_layers]
327 if f.material_index<len(self.materials):
328 mat = self.materials[f.material_index]
329 if mat and mat.array_atlas:
330 layer = mat.array_layer
332 for l in array_uv_layers:
333 for i in f.loop_indices:
334 l.uvs[i] = mathutils.Vector((*l.uvs[i], layer))
337 for u in self.uv_layers:
338 f.uvs.append([u.uvs[i] for i in f.loop_indices])
342 uv_names = [u.name for u in self.uv_layers]
343 if self.tbn_uvtex in uv_names:
344 tbn_layer_index = uv_names.index(self.tbn_uvtex)
345 self.compute_tbn(tbn_layer_index)
346 self.split_vertices(self.find_uv_group, progress, tbn_layer_index)
348 for i in range(len(self.uv_layers)):
349 self.split_vertices(self.find_uv_group, progress, i)
351 for v in self.vertices:
354 i = f.vertices.index(v)
355 v.uvs = [u[i] for u in f.uvs]
357 v.uvs = [(0.0, 0.0)]*len(self.uv_layers)
359 def split_vertices(self, find_group_func, progress, *args):
361 for i in range(len(self.vertices)):
369 vg.append(find_group_func(v, f, *args))
374 progress.set_progress(i*0.5/len(self.vertices))
376 for i in range(len(self.vertices)):
377 for g in groups[i][1:]:
378 v = Vertex(self.vertices[i])
379 v.index = len(self.vertices)
380 self.vertices.append(v)
383 for e in self.vertices[i].edges:
384 e_faces_in_g = [f for f in e.faces if f in g]
386 boundary = len(e_faces_in_g)<len(e.faces)
387 v_edges.append((e, boundary, e_faces_in_g))
389 for e, boundary, e_faces_in_g in v_edges:
392 ne.index = len(self.edges)
393 self.edges.append(ne)
395 for f in e_faces_in_g:
397 f.edges[f.edges.index(e)] = ne
401 del self.edge_map[e.key]
402 self.vertices[i].edges.remove(e)
405 e.vertices[e.vertices.index(self.vertices[i])] = v
407 e.key = make_edge_key(e.vertices[0].index, e.vertices[1].index)
408 self.edge_map[e.key] = e
411 self.vertices[i].faces.remove(f)
412 f.vertices[f.vertices.index(self.vertices[i])] = v
416 progress.set_progress(0.5+i*0.5/len(self.vertices))
418 def find_smooth_group(self, vertex, face):
421 edges = [e for e in face.edges if vertex in e.vertices]
433 e = f.other_edge(e, vertex)
437 def find_uv_group(self, vertex, face, index):
438 uv = face.uvs[index][face.vertices.index(vertex)]
442 for f in vertex.faces:
443 if not f.flag and f.uvs[index][f.vertices.index(vertex)]==uv:
449 def compute_normals(self):
450 for v in self.vertices:
451 v.normal = mathutils.Vector()
453 fv = f.pivot_vertices(v)
454 edge1 = fv[1].co-fv[0].co
455 edge2 = fv[-1].co-fv[0].co
456 if edge1.length and edge2.length:
457 v.normal += f.normal*edge1.angle(edge2)
462 v.normal = mathutils.Vector((0, 0, 1))
464 def compute_tbn(self, index):
465 layer_uvs = self.uv_layers[index].uvs
467 for v in self.vertices:
468 v.tan = mathutils.Vector()
469 v.bino = mathutils.Vector()
471 vi = f.vertices.index(v)
472 uv0 = layer_uvs[f.loop_indices[vi]]
473 uv1 = layer_uvs[f.loop_indices[vi+1]]
474 uv2 = layer_uvs[f.loop_indices[vi-1]]
479 edge1 = f.vertices[vi+1].co-f.vertices[vi].co
480 edge2 = f.vertices[vi-1].co-f.vertices[vi].co
481 div = (du1*dv2-du2*dv1)
483 mul = edge1.angle(edge2)/div
484 v.tan += (edge1*dv2-edge2*dv1)*mul
485 v.bino += (edge2*du1-edge1*du2)*mul
492 def drop_references(self):
493 for v in self.vertices:
501 for u in self.uv_layers:
505 def create_strip(self, face, max_len):
506 # Find an edge with another unused face next to it
509 other = e.other_face(face)
510 if other and not other.flag:
517 # Add initial vertices so that we'll complete the edge on the first
519 vertices = face.pivot_vertices(*edge.vertices)
521 result = [vertices[-1], vertices[0]]
523 result = [vertices[-2], vertices[-1]]
528 vertices = face.pivot_vertices(*result[-2:])
531 # Quads need special handling because the winding of every other
532 # triangle in the strip is reversed
533 if len(vertices)==4 and not k:
534 result.append(vertices[3])
535 result.append(vertices[2])
536 if len(vertices)==4 and k:
537 result.append(vertices[3])
539 if len(result)>=max_len:
542 # Hop over the last edge
543 edge = face.get_edge(*result[-2:])
544 face = edge.other_face(face)
545 if not face or face.flag:
550 def create_mesh_from_object(context, obj, progress=None):
552 raise Exception("Object is not a mesh")
554 objs = [(obj, mathutils.Matrix())]
560 if c.type=="MESH" and c.compound:
561 objs.append((c, m*c.matrix_local))
566 bmesh = o.to_mesh(context.scene, True, "PREVIEW")
567 bmeshes.append(bmesh)
576 mesh.prepare_smoothing(progress)
577 mesh.prepare_vertex_groups(obj)
578 mesh.prepare_uv(obj, progress)
580 mesh.drop_references()
582 bpy.data.meshes.remove(m)