5 Name: 'MSP GL Mesh (.mesh)...'
15 def make_edge_key(i1, i2):
16 return (min(i1, i2), max(i1, i2))
20 def __init__(self, me):
21 if me.__class__==Edge:
29 def __getattr__(self, attr):
30 return getattr(self._medge, attr)
32 def __cmp__(self, other):
35 def check_smooth(self, limit):
36 if len(self.faces)!=2:
39 d=Blender.Mathutils.DotVecs(self.faces[0].no, self.faces[1].no)
40 if (d>limit and self.faces[0].smooth and self.faces[1].smooth) or d>0.999:
43 def other_face(self, f):
44 if f.index==self.faces[0].index:
45 if len(self.faces)>=2:
54 def __init__(self, mv):
55 if mv.__class__==Vertex:
61 self.orig_index=self._mvert.index
65 def __getattr__(self, attr):
66 return getattr(self._mvert, attr)
68 def __cmp__(self, other):
69 return cmp(self.index, other.index)
72 return "<Vert %d (%.4f, %.4f, %.4f) (%.4f, %.4f, %.4f)>"%(self.index, self.co[0], self.co[1], self.co[2], self.no[0], self.no[1], self.no[2])
78 def __init__(self, mf):
81 self.verts=[v for v in mf.verts]
84 def __getattr__(self, attr):
85 return getattr(self._mface, attr)
87 def __cmp__(self, other):
88 return cmp(self.index, other.index)
91 return "<Face %d (%s)>"%(self.index, " ".join([str(v.index) for v in self.verts]))
95 def get_vertices_from(self, reverse, *vt):
99 indices=[u.index for u in vt]
100 flags=[(v.index in indices) for v in verts]
103 if flags[i] and not flags[(i+l-1)%l]:
104 return verts[i:]+verts[:i]
106 def get_edge(self, v1, v2):
107 key=make_edge_key(v1.index, v2.index)
114 def __init__(self, e):
116 self.verts=[e.v1, e.v2]
120 return "<Line (%d %d)>"%(self.verts[0].index, self.verts[1].index)
126 def __init__(self, m):
128 self.verts=[Vertex(v) for v in m.verts]
129 self.faces=[Face(f) for f in m.faces]
132 for i in range(len(f.verts)):
133 f.verts[i]=self.verts[f.verts[i].index]
134 f.verts[i].faces.append(f)
136 self.edges=dict([(e.key, Edge(e)) for e in m.edges])
138 for k in f.edge_keys:
140 e.faces.append(self.faces[f.index])
143 self.lines=[Line(e) for e in self.edges.itervalues() if not e.faces]
145 smooth_limit=math.cos(m.degr*math.pi/180)
146 for e in self.edges.itervalues():
147 e.v1=self.verts[e.v1.index]
148 e.v2=self.verts[e.v2.index]
149 e.check_smooth(smooth_limit)
151 def __getattr__(self, attr):
152 return getattr(self._mesh, attr)
154 def split_vertices(self, debug=False):
163 vg.append(self.find_group(v, f))
167 for i in range(len(self.verts)):
168 if len(groups[i])==1:
172 print "Vertex %s has %d groups"%(self.verts[i], len(groups[i]))
174 for g in groups[i][1:]:
175 v=Vertex(self.verts[i])
176 v.index=len(self.verts)
180 print " -> %d"%v.index
183 for j in range(len(f.edges)):
186 if e.v1!=self.verts[i] and e.v2!=self.verts[i]:
190 print " Splitting edge %s with faces %s"%(e.key, e.faces)
200 del self.edges[e.key]
202 if e.v1==self.verts[i]:
204 elif e.v2==self.verts[i]:
207 e.key=make_edge_key(e.v1.index, e.v2.index)
211 self.verts[i].faces.remove(f)
212 f.verts[f.verts.index(self.verts[i])]=v
215 def find_group(self, vert, face):
216 face_indices=[f.index for f in vert.faces]
223 other=e.other_face(f)
224 if not other or other.index not in face_indices:
234 def compute_normals(self):
237 v.no=Blender.Mathutils.Vector()
242 # XXX Should use edges to compute normal
243 v.no=Blender.Mathutils.Vector(0, 0, 1)
245 def create_strip(self, face, reverse, debug):
248 other=e.other_face(face)
249 if other and not other.flag:
257 print "Starting strip from %s, edge %s, reverse=%s"%([v.index for v in face.verts], (edge.v1.index, edge.v2.index), reverse)
259 verts=face.get_vertices_from(reverse, edge.v1, edge.v2)
261 result=[verts[-1], verts[0]]
263 result=[verts[-2], verts[-1]]
266 verts=face.get_vertices_from(reverse, *result[-2:])
269 print " Adding %s"%face
272 if len(verts)==4 and not k:
273 result.append(verts[3])
274 result.append(verts[2])
275 if len(verts)==4 and k:
276 result.append(verts[3])
278 edge=face.get_edge(*result[-2:])
281 print " Next edge is %s"%(edge.key, )
283 next=edge.other_face(face)
284 if not next or next.flag:
289 print " %s"%[v.index for v in result]
295 def __init__(self, fn):
298 self.out_file=sys.stdout
300 self.out_file=file(fn, "w")
302 self.use_degen_tris=True
303 self.optimize_locality=True
304 self.export_lines=True
306 self.strip_debug=False
307 self.smooth_debug=False
309 def get_locality(self, strip):
311 for i in range(1, len(strip)):
312 if strip[i].index!=strip[i-1].index:
313 total+=1.0/(abs(strip[i].index-strip[i-1].index))
314 return total/len(strip)
316 def get_followers(self, strip):
318 for i in range(len(strip)-1):
322 if v.index not in result:
324 if n.index not in result[v.index]:
325 result[v.index][n.index]=1
327 result[v.index][n.index]+=1
331 scene=bpy.data.scenes.active
333 obj=scene.objects.active
334 if obj.getType()!="Mesh":
335 raise Exception, "Can only export Mesh data"
337 mesh=Mesh(obj.getData(mesh=True))
340 ntris=sum([len(f.verts)-2 for f in mesh.faces])
341 print "Starting with %d vertices, %d faces (%d triangles) and %d edges"%(len(mesh.verts), len(mesh.faces), ntris, len(mesh.edges))
343 mesh.split_vertices(self.smooth_debug)
346 ntris=sum([len(f.verts)-2 for f in mesh.faces])
347 print "After splitting %d vertices, %d faces (%d triangles) and %d edges"%(len(mesh.verts), len(mesh.faces), ntris, len(mesh.edges))
349 mesh.compute_normals()
364 other=e.other_face(f)
365 if other and not other.flag:
367 if score>0 and score<best:
374 strip=mesh.create_strip(face, self.use_degen_tris and sum([len(s) for s in strips])%2, self.strip_debug)
379 print "%d strips:"%len(strips)
380 for i in range(len(strips)):
381 print " %d: %d indices"%(i, len(strips[i]))
382 print "%d loose faces"%len([f for f in mesh.faces if not f.flag])
383 nind=sum([len(s) for s in strips])+sum([len(f.verts) for f in mesh.faces if not f.flag])
384 print "%d indices total"%nind
386 if self.use_degen_tris and strips:
390 big_strip+=[big_strip[-1], s[0]]
400 big_strip+=[big_strip[-1], f.verts[order[0]]]
401 big_strip+=[f.verts[i] for i in order[:len(f.verts)]]
408 print "Big strip has %d indices"%len(big_strip)
411 print "%.2f indices per triangle"%(float(nind)/max(ntris, 1))
412 print "Locality before optimization: "+" ".join(["%.3f"%self.get_locality(s) for s in strips])
414 if self.optimize_locality and self.use_strips and strips:
417 followers.update(self.get_followers(s))
426 if vert.index in followers:
427 flw=followers[vert.index]
430 if flw[n]>best and not mesh.verts[n].flag:
432 best=flw[n]+0.9/abs(vert.index-n)
446 for i in range(len(mesh.verts)):
447 mesh.verts[i].index=i
450 print "Locality after optimization: "+" ".join(["%.3f"%self.get_locality(s) for s in strips])
452 self.out_file.write("vertices NORMAL3")
454 self.out_file.write("_TEXCOORD2")
455 self.out_file.write("_VERTEX3\n{\n")
460 self.out_file.write("\tnormal3 %f %f %f;\n"%tuple(v.no))
463 self.out_file.write("\ttexcoord2 %f %f;\n"%tuple(v.uv))
465 self.out_file.write("\tvertex3 %f %f %f;\n"%tuple(v.co))
466 self.out_file.write("};\n")
468 self.out_file.write("batch TRIANGLE_STRIP\n{\n\tindices")
471 self.out_file.write(" %u"%v.index)
474 self.out_file.write(";\n\tindices")
475 self.out_file.write(";\n};\n")
481 self.out_file.write("batch TRIANGLES\n{\n")
483 for i in range(2, len(f.verts)):
484 self.out_file.write("\tindices %u %u %u;\n"%(f.verts[0].index, f.verts[i-1].index, f.verts[i].index))
486 self.out_file.write("};\n")
488 if self.export_lines and mesh.lines:
489 self.out_file.write("batch LINES\n{\n")
491 self.out_file.write("\tindices %u %u;\n"%(l.verts[0].index, l.verts[1].index))
492 self.out_file.write("};\n")
497 self.config=Blender.Registry.GetKey('mspgl_export', True) or {}
498 self.temp_config=Blender.Registry.GetKey('mspgl_export_temp') or {}
501 self.use_strips=Blender.Draw.Create(self.config.get('use_strips', True))
502 self.use_degen_tris=Blender.Draw.Create(self.config.get('use_degen_tris', True))
503 self.optimize_locality=Blender.Draw.Create(self.config.get('optimize_locality', True))
504 self.export_lines=Blender.Draw.Create(self.config.get('export_lines', False))
505 self.debug=Blender.Draw.Create(self.config.get('debug', False))
506 self.strip_debug=Blender.Draw.Create(self.config.get('strip_debug', False))
507 self.smooth_debug=Blender.Draw.Create(self.config.get('smooth_debug', False))
508 ret=Blender.Draw.PupBlock("Export MSP GL mesh",
509 [("Use strips", self.use_strips, "Generage OpenGL triangle strips"),
510 ("Use degen tris", self.use_degen_tris, "Use degenerate triangles to combine triangle strips"),
511 ("Optimize locality", self.optimize_locality),
512 ("Export lines", self.export_lines),
513 ("Debugging options"),
514 ("Debug", self.debug),
515 ("Debug strips", self.strip_debug),
516 ("Debug smoothing", self.smooth_debug)])
518 dirname=self.temp_config.get("dirname", Blender.sys.dirname(Blender.Get("filename")))
519 obj=bpy.data.scenes.active.objects.active
520 Blender.Window.FileSelector(self.export, "Export MSP GL mesh", "%s/%s.mesh"%(dirname, obj.name))
525 def export(self, fn):
526 self.config['use_strips']=self.use_strips.val
527 self.config['use_degen_tris']=self.use_degen_tris.val
528 self.config['optimize_locality']=self.optimize_locality.val
529 self.config['export_lines']=self.export_lines.val
530 self.config['debug']=self.debug.val
531 self.config['strip_debug']=self.strip_debug.val
532 self.config['smooth_debug']=self.smooth_debug.val
533 Blender.Registry.SetKey('mspgl_export', self.config, True)
536 self.temp_config["dirname"]=os.path.dirname(fn)
537 Blender.Registry.SetKey('mspgl_export_temp', self.temp_config)
540 exp.use_strips=self.use_strips.val
541 exp.use_degen_tris=self.use_degen_tris.val
542 exp.optimize_locality=self.optimize_locality.val
543 exp.export_lines=self.export_lines.val
544 exp.debug=self.debug.val
545 exp.strip_debug=self.strip_debug.val
546 exp.smooth_debug=self.smooth_debug.val
550 if __name__=="__main__":