5 def make_edge_key(i1, i2):
6 return (min(i1, i2), max(i1, i2))
9 def __init__(self, edge):
10 if edge.__class__==Edge:
11 self._edge = edge._edge
12 self.vertices = edge.vertices[:]
13 self.smooth = edge.smooth
20 def __getattr__(self, attr):
21 return getattr(self._edge, 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, vertex):
48 if vertex.__class__==Vertex:
49 self._vertex = vertex._vertex
50 self.uvs = vertex.uvs[:]
52 self.bino = vertex.bino
58 self.index = vertex.index
60 self.normal = vertex.normal
64 self.groups = vertex.groups[:]
66 def __getattr__(self, attr):
67 return getattr(self._vertex, attr)
69 def __cmp__(self, other):
72 return cmp(self.index, other.index)
76 def __init__(self, group):
78 self.group = group.group
79 self.weight = group.weight
81 def __getattr__(self, attr):
82 return getattr(self._group, attr)
86 def __init__(self, face):
88 self.index = face.index
90 self.vertices = face.vertices[:]
94 def __getattr__(self, attr):
95 return getattr(self._face, attr)
97 def __cmp__(self, other):
100 return cmp(self.index, other.index)
102 def pivot_vertex(self, v):
103 n = self.vertices.index(v)
104 return [(n+i)%len(self.vertices) for i in range(len(self.vertices))]
106 def pivot_vertices(self, *vt):
107 flags = [(v in vt) for v in self.vertices]
108 l = len(self.vertices)
110 if flags[i] and not flags[(i+l-1)%l]:
111 return self.vertices[i:]+self.vertices[:i]
113 def get_edge(self, v1, v2):
114 key = make_edge_key(v1.index, v2.index)
118 raise KeyError("No edge %s"%(key,))
120 def other_edge(self, e, v):
122 if d!=e and v in d.vertices:
125 def get_neighbors(self):
126 neighbors = [e.other_face(self) for e in self.edges]
127 return list(filter(bool, neighbors))
131 def __init__(self, e):
133 self.vertices = e.vertices[:]
138 def __init__(self, arg):
145 self.uvs = [d.uv for d in self.data]
150 dot = self.name.find('.')
152 ext = self.name[dot:]
153 if ext.startswith(".unit") and ext[5:].isdigit():
154 self.unit = int(ext[5:])
158 def __getattr__(self, attr):
159 return getattr(self._layer, attr)
163 def __init__(self, mesh):
166 self.winding_test = mesh.winding_test
167 self.tbn_vecs = mesh.tbn_vecs
168 self.vertex_groups = mesh.vertex_groups
170 self.vertices = [Vertex(v) for v in self.vertices]
171 self.faces = [Face(f) for f in self.polygons]
172 self.edges = [Edge(e) for e in self.edges]
173 self.loops = self.loops[:]
175 self.materials = self.materials[:]
176 if self.use_uv=='NONE' or not self.uv_layers:
179 self.uv_layers = [UvLayer(u) for u in self.uv_layers]
180 self.uv_layers = sorted([u for u in self.uv_layers if not u.hidden], key=(lambda u: (u.unit or 1000, u.name)))
182 if self.use_uv=='UNIT0':
183 self.uv_layers = [self.uv_layers[0]]
185 next_unit = max((u.unit+1 for u in self.uv_layers if u.unit is not None), default=0)
186 for u in self.uv_layers:
191 for v in self.vertices:
192 v.groups = [VertexGroup(g) for g in v.groups]
194 edge_map = {e.key: e for e in self.edges}
196 if len(f.vertices)>4:
197 raise ValueError("Ngons are not supported")
199 f.vertices = [self.vertices[i] for i in f.vertices]
203 for k in f.edge_keys:
209 e.vertices = [self.vertices[i] for i in e.vertices]
214 self.lines = [Line(e) for e in self.edges if not e.faces]
218 def __getattr__(self, attr):
219 return getattr(self._mesh, attr)
221 def transform(self, matrix):
222 for v in self.vertices:
225 def splice(self, other):
226 if len(self.uv_layers)!=len(other.uv_layers):
227 raise ValueError("Meshes have incompatible UV layers")
228 for i, u in enumerate(self.uv_layers):
229 if u.name!=other.uv_layers[i].name:
230 raise ValueError("Meshes have incompatible UV layers")
233 for m in other.materials:
234 if m in self.materials:
235 material_map.append(self.materials.index(m))
237 material_map.append(len(self.materials))
238 self.materials.append(m)
240 for i, u in enumerate(self.uv_layers):
241 u.uvs += other.uv_layers[i].uvs
243 offset = len(self.vertices)
244 self.vertices += other.vertices
245 for v in self.vertices[offset:]:
248 loop_offset = len(self.loops)
249 self.loops += other.loops
251 offset = len(self.faces)
252 self.faces += other.faces
253 for f in self.faces[offset:]:
255 f.loop_start += loop_offset
256 f.loop_indices = range(f.loop_start, f.loop_start+f.loop_total)
258 f.material_index = material_map[f.material_index]
260 offset = len(self.edges)
261 self.edges += other.edges
262 for e in self.edges[offset:]:
264 e.key = make_edge_key(e.vertices[0].index, e.vertices[1].index)
266 self.lines += other.lines
268 def prepare_smoothing(self, progress):
270 if self.smoothing=='NONE':
275 elif self.use_auto_smooth:
276 smooth_limit = math.cos(self.auto_smooth_angle)
279 e.check_smooth(smooth_limit)
281 progress.push_task("Sharp edges", 0.0, 0.7)
282 self.split_vertices(self.find_smooth_group, progress)
284 if self.smoothing!='BLENDER':
285 progress.set_task("Updating normals", 0.7, 1.0)
286 self.compute_normals(progress)
290 def prepare_vertex_groups(self, obj):
291 for v in self.vertices:
293 weight_sum = sum(g.weight for g in v.groups)
294 v.groups = sorted(v.groups, key=(lambda g: g.weight), reverse=True)[:self.max_groups_per_vertex]
295 weight_scale = weight_sum/sum(g.weight for g in v.groups)
297 g.weight *= weight_scale
299 if obj.parent and obj.parent.type=="ARMATURE":
300 armature = obj.parent.data
301 bone_indices = {b.name: i for i, b in enumerate(armature.bones)}
302 group_index_map = {i: i for i in range(len(obj.vertex_groups))}
303 for g in first_obj.vertex_groups:
304 if g.name in bone_indices:
305 group_index_map[g.index] = bone_indices[g.name]
307 for v in self.vertices:
309 g.group = group_index_map[g.group]
311 def prepare_uv(self, obj, progress):
312 if obj.material_tex and self.use_uv!='NONE':
313 layer = UvLayer("material_tex")
315 if self.use_uv=='UNIT0':
316 self.uv_layers = [layer]
319 self.uv_layers.append(layer)
320 layer.unit = max((u.unit+1 for u in self.uv_layers if u.unit is not None), default=0)
322 layer.uvs = [None]*len(self.loops)
324 uv = mathutils.Vector(((f.material_index+0.5)/len(self.materials), 0.5))
325 for i in f.loop_indices:
328 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']
329 array_uv_layers = [u for u in self.uv_layers if u.name in array_uv_layers]
334 if f.material_index<len(self.materials):
335 mat = self.materials[f.material_index]
336 if mat and mat.array_atlas:
337 layer = mat.array_layer
339 for l in array_uv_layers:
340 for i in f.loop_indices:
341 l.uvs[i] = mathutils.Vector((*l.uvs[i], layer))
344 for u in self.uv_layers:
345 f.uvs.append([u.uvs[i] for i in f.loop_indices])
347 prog_count = len(self.uv_layers)
352 uv_names = [u.name for u in self.uv_layers]
353 if self.tbn_uvtex in uv_names:
355 tbn_layer_index = uv_names.index(self.tbn_uvtex)
356 progress.push_task_slice("Computing TBN", 0, prog_count)
357 self.split_vertices(self.find_uv_group, progress, tbn_layer_index)
358 progress.set_task_slice(self.tbn_uvtex, 1, prog_count)
359 self.compute_tbn(tbn_layer_index, progress)
363 for i, u in enumerate(self.uv_layers):
364 if i==tbn_layer_index:
367 progress.push_task_slice(u.name, prog_step, prog_count)
368 self.split_vertices(self.find_uv_group, progress, i)
372 for v in self.vertices:
375 i = f.vertices.index(v)
376 v.uvs = [u[i] for u in f.uvs]
378 v.uvs = [(0.0, 0.0)]*len(self.uv_layers)
380 def split_vertices(self, find_group_func, progress, *args):
381 vertex_count = len(self.vertices)
382 for i in range(vertex_count):
390 groups.append(find_group_func(v, f, *args))
394 nv.index = len(self.vertices)
395 self.vertices.append(nv)
398 e_faces_in_g = [f for f in e.faces if f in g]
402 if len(e_faces_in_g)<len(e.faces):
404 ne.index = len(self.edges)
405 self.edges.append(ne)
407 ne.other_vertex(v).edges.append(ne)
409 for f in e_faces_in_g:
411 f.edges[f.edges.index(e)] = ne
416 e.vertices[e.vertices.index(v)] = nv
419 e.key = make_edge_key(e.vertices[0].index, e.vertices[1].index)
421 v.edges = [e for e in v.edges if v in e.vertices]
425 f.vertices[f.vertices.index(v)] = nv
428 progress.set_progress(i/vertex_count)
430 def find_smooth_group(self, vertex, face):
433 edges = [e for e in face.edges if vertex in e.vertices]
445 e = f.other_edge(e, vertex)
449 def find_uv_group(self, vertex, face, index):
450 uv = face.uvs[index][face.vertices.index(vertex)]
454 for f in vertex.faces:
455 if not f.flag and f.uvs[index][f.vertices.index(vertex)]==uv:
461 def compute_normals(self, progress):
462 for i, v in enumerate(self.vertices):
463 v.normal = mathutils.Vector()
465 fv = f.pivot_vertices(v)
466 edge1 = fv[1].co-fv[0].co
467 edge2 = fv[-1].co-fv[0].co
468 if edge1.length and edge2.length:
469 v.normal += f.normal*edge1.angle(edge2)
474 v.normal = mathutils.Vector((0, 0, 1))
476 progress.set_progress(i/len(self.vertices))
478 def compute_tbn(self, index, progress):
479 layer_uvs = self.uv_layers[index].uvs
481 for i, v in enumerate(self.vertices):
482 v.tan = mathutils.Vector()
483 v.bino = mathutils.Vector()
485 vi = f.pivot_vertex(v)
486 uv0 = layer_uvs[f.loop_indices[vi[0]]]
487 uv1 = layer_uvs[f.loop_indices[vi[1]]]
488 uv2 = layer_uvs[f.loop_indices[vi[-1]]]
493 edge1 = f.vertices[vi[1]].co-f.vertices[vi[0]].co
494 edge2 = f.vertices[vi[-1]].co-f.vertices[vi[0]].co
495 div = (du1*dv2-du2*dv1)
497 mul = edge1.angle(edge2)/div
498 v.tan += (edge1*dv2-edge2*dv1)*mul
499 v.bino += (edge2*du1-edge1*du2)*mul
506 progress.set_progress(i/len(self.vertices))
508 def drop_references(self):
509 for v in self.vertices:
517 for u in self.uv_layers:
521 def create_strip(self, face, max_len):
522 # Find an edge with another unused face next to it
525 other = e.other_face(face)
526 if other and not other.flag:
533 # Add initial vertices so that we'll complete the edge on the first
535 vertices = face.pivot_vertices(*edge.vertices)
537 result = [vertices[-1], vertices[0]]
539 result = [vertices[-2], vertices[-1]]
544 vertices = face.pivot_vertices(*result[-2:])
547 # Quads need special handling because the winding of every other
548 # triangle in the strip is reversed
549 if len(vertices)==4 and not k:
550 result.append(vertices[3])
551 result.append(vertices[2])
552 if len(vertices)==4 and k:
553 result.append(vertices[3])
555 if len(result)>=max_len:
558 # Hop over the last edge
559 edge = face.get_edge(*result[-2:])
560 face = edge.other_face(face)
561 if not face or face.flag:
566 def create_mesh_from_object(context, obj, progress):
568 raise Exception("Object is not a mesh")
570 progress.push_task("Preparing mesh", 0.0, 0.3)
572 objs = [(obj, mathutils.Matrix())]
578 if c.type=="MESH" and c.compound:
579 objs.append((c, m*c.matrix_local))
584 bmesh = o.to_mesh(context.scene, True, "PREVIEW")
585 bmeshes.append(bmesh)
587 # Object.to_mesh does not copy custom properties
588 bmesh.winding_test = o.data.winding_test
589 bmesh.smoothing = o.data.smoothing
590 bmesh.use_lines = o.data.use_lines
591 bmesh.vertex_groups = o.data.vertex_groups
592 bmesh.max_groups_per_vertex = o.data.max_groups_per_vertex
593 bmesh.use_uv = o.data.use_uv
594 bmesh.tbn_vecs = o.data.tbn_vecs
595 bmesh.tbn_uvtex = o.data.tbn_uvtex
605 progress.set_task("Smoothing", 0.3, 0.6)
606 mesh.prepare_smoothing(progress)
607 progress.set_task("Vertex groups", 0.6, 0.7)
608 mesh.prepare_vertex_groups(obj)
609 progress.set_task("Preparing UVs", 0.7, 1.0)
610 mesh.prepare_uv(obj, progress)
612 mesh.drop_references()
614 bpy.data.meshes.remove(m)