"""
import sys
+import math
+import bpy
import Blender
+class Edge:
+ def __init__(self, me):
+ if me.__class__==Edge:
+ self._medge=me._medge
+ self.smooth=me.smooth
+ else:
+ self._medge=me
+ self.smooth=False
+ self.faces=[]
+
+ def __getattr__(self, attr):
+ return getattr(self._medge, attr)
+
+ def check_smooth(self, limit):
+ if len(self.faces)!=2:
+ return
+
+ d=Blender.Mathutils.DotVecs(self.faces[0].no, self.faces[1].no)
+ if (d>limit and self.faces[0].smooth and self.faces[1].smooth) or d>0.999:
+ self.smooth=1
+
+ def other_face(self, f):
+ if f.index==self.faces[0].index:
+ if len(self.faces)>=2:
+ return self.faces[1]
+ else:
+ return None
+ else:
+ return self.faces[0]
+
+
+class Vertex:
+ def __init__(self, mv):
+ if mv.__class__==Vertex:
+ self._mvert=mv._mvert
+ self.uv=mv.uv
+ else:
+ self._mvert=mv
+ self.uv=None
+ self.orig_index=self._mvert.index
+ self.flag=False
+
+ def __getattr__(self, attr):
+ return getattr(self._mvert, attr)
+
+
+class Face:
+ def __init__(self, mf):
+ self._mface=mf
+ self.smooth_group=None
+ self.edges=[]
+ self.verts=[v for v in mf.verts]
+ self.flag=False
+
+ def __getattr__(self, attr):
+ return getattr(self._mface, attr)
+
+ def get_vertices_from(self, reverse, *vt):
+ verts=self.verts[:]
+ if reverse:
+ verts.reverse()
+ indices=[u.index for u in vt]
+ flags=[(v.index in indices) for v in verts]
+ l=len(verts)
+ for i in range(l):
+ if flags[i] and not flags[(i+l-1)%l]:
+ return verts[i:]+verts[:i]
+
+ def get_edge(self, v1, v2):
+ i1=v1.index
+ i2=v2.index
+ for e in self.edges:
+ if (e.v1.index==i1 or e.v1.index==i2) and (e.v2.index==i1 or e.v2.index==i2):
+ return e
+
+
+class SmoothGroup:
+ def __init__(self, index):
+ self.index=index
+ self.faces=[]
+ self.verts=[]
+
+ def find_vertices(self):
+ vert_map={}
+ for f in self.faces:
+ for i in range(len(f.verts)):
+ v=f.verts[i]
+ if v.index not in vert_map:
+ vt=Vertex(v)
+ vt.index=len(self.verts)
+ self.verts.append(vt)
+
+ vert_map[v.index]=vt
+ vt.no=Blender.Mathutils.Vector(f.no)
+ else:
+ vt=vert_map[v.index]
+ vt.no+=f.no
+ f.verts[i]=vt
+
+ for v in self.verts:
+ v.no.normalize()
+
+ def separate_uv(self):
+ copies={}
+ for f in self.faces:
+ for i in range(len(f.verts)):
+ v=f.verts[i]
+ if not v.uv:
+ v.uv=f.uv[i]
+ elif f.uv[i]!=v.uv:
+ if v.index not in copies:
+ copies[v.index]=[]
+
+ vt=None
+ for w in copies[v.index]:
+ if w.uv==f.uv[i]:
+ vt=w
+ break
+
+ if not vt:
+ vt=Vertex(v)
+ vt.index=len(self.verts)
+ vt.uv=f.uv[i]
+ self.verts.append(vt)
+ copies[v.index].append(vt)
+
+ f.verts[i]=vt
+
+ def create_edges(self):
+ edge_map={}
+ for f in self.faces:
+ vert_map=dict([(v.orig_index, v) for v in f.verts])
+ for i in range(len(f.edges)):
+ v1=vert_map[f.edges[i].v1.index]
+ v2=vert_map[f.edges[i].v2.index]
+ key=tuple(sorted((v1.index, v2.index)))
+
+ if key in edge_map:
+ e=edge_map[key]
+ else:
+ e=Edge(f.edges[i])
+ edge_map[key]=e
+ e.v1=v1
+ e.v2=v2
+ e.key=key
+
+ f.edges[i]=e
+ e.faces.append(f)
+
+
class Exporter:
def __init__(self, fn):
self.filename=fn
self.out_file=sys.stdout
else:
self.out_file=file(fn, "w")
+ self.use_strips=True
+ self.use_degen_tris=True
+ self.optimize_locality=True
+ self.debug=False
+ self.strip_debug=False
+
+ def find_smooth_group(self, face, sg):
+ face.smooth_group=sg
+ sg.faces.append(face)
+ queue=[face]
+ while queue:
+ cur=queue.pop(0)
+ for e in cur.edges:
+ if e.smooth:
+ other=e.other_face(cur)
+ if other and not other.smooth_group:
+ other.smooth_group=sg
+ sg.faces.append(other)
+ queue.append(other)
+
+ def create_strip(self, face, reverse):
+ edge=None
+ for e in face.edges:
+ other=e.other_face(face)
+ if other and other.smooth_group.index==face.smooth_group.index and not other.flag:
+ edge=e
+ break
+
+ if not edge:
+ return None
+
+ if self.strip_debug:
+ print "Starting strip from %s, edge %s, reverse=%s"%([v.index for v in face.verts], (edge.v1.index, edge.v2.index), reverse)
+
+ verts=face.get_vertices_from(reverse, edge.v1, edge.v2)
+ if len(verts)==3:
+ result=[verts[-1], verts[0]]
+ else:
+ result=[verts[-2], verts[-1]]
+
+ while 1:
+ verts=face.get_vertices_from(reverse, *result[-2:])
+ k=len(result)%2
+ if self.strip_debug:
+ print " Adding %s"%[v.index for v in verts]
+
+ face.flag=True
+ if len(verts)==4 and not k:
+ result.append(verts[3])
+ result.append(verts[2])
+ if len(verts)==4 and k:
+ result.append(verts[3])
+
+ edge=face.get_edge(*result[-2:])
+
+ if self.strip_debug:
+ print " Next edge is %s"%((edge.v1.index, edge.v2.index), )
+
+ next=edge.other_face(face)
+ if not next or next.smooth_group.index!=face.smooth_group.index or next.flag:
+ break
+ face=next
+
+ if self.strip_debug:
+ print " %s"%[v.index for v in result]
+
+ return result
+
+ def get_locality(self, strip):
+ total=0
+ for i in range(1, len(strip)):
+ if strip[i].index!=strip[i-1].index:
+ total+=1.0/(abs(strip[i].index-strip[i-1].index))
+ return total/len(strip)
+
+ def get_followers(self, strip):
+ result={}
+ for i in range(len(strip)-1):
+ v=strip[i]
+ n=strip[i+1]
+ if v.index!=n.index:
+ if v.index not in result:
+ result[v.index]={}
+ if n.index not in result[v.index]:
+ result[v.index][n.index]=1
+ else:
+ result[v.index][n.index]+=1
+ return result
def export(self):
- scene=Blender.Scene.GetCurrent()
+ scene=bpy.data.scenes.active
- obj=scene.getActiveObject()
+ obj=scene.objects.active
if obj.getType()!="Mesh":
raise Exception, "Can only export Mesh data"
mesh=obj.getData(mesh=True)
- self.out_file.write("vertices NORMAL3,VERTEX3\n{\n")
- for v in mesh.verts:
- self.out_file.write("\tnormal3 %g %g %g;\n"%tuple(v.no))
- self.out_file.write("\tvertex3 %g %g %g;\n"%tuple(v.co))
- self.out_file.write("};\n")
- self.out_file.write("batch TRIANGLES\n{\n")
- for f in mesh.faces:
- for i in range(2, len(f.verts)):
- self.out_file.write("\tindices %u %u %u;\n"%(f.verts[0].index, f.verts[i-1].index, f.verts[i].index))
+ faces=[Face(f) for f in mesh.faces]
+
+ edges=dict([(e.key, Edge(e)) for e in mesh.edges])
+ for f in faces:
+ for e in f.edge_keys:
+ edges[e].faces.append(f)
+ f.edges.append(edges[e])
+
+ smooth_limit=math.cos(mesh.degr*math.pi/180)
+ for e in edges.itervalues():
+ e.check_smooth(smooth_limit)
+
+ if self.debug:
+ ntris=sum([len(f.verts)-2 for f in faces])
+ print "%d faces (%d triangles), %d edges"%(len(faces), ntris, len(edges))
+
+ smooth_groups=[]
+ for f in faces:
+ if not f.smooth_group:
+ sg=SmoothGroup(len(smooth_groups))
+ smooth_groups.append(sg)
+ self.find_smooth_group(f, sg)
+
+ for sg in smooth_groups:
+ sg.find_vertices()
+ if mesh.faceUV:
+ sg.separate_uv()
+ sg.create_edges()
+
+ verts=[]
+ for sg in smooth_groups:
+ for v in sg.verts:
+ v.index=len(verts)
+ verts.append(v)
+
+ if self.debug:
+ print "%d smooth groups:"%len(smooth_groups)
+ for i in range(len(smooth_groups)):
+ sg=smooth_groups[i]
+ print " %d: %d faces, %d vertices"%(i, len(sg.faces), len(sg.verts))
+ print "%d vertices total"%len(verts)
+
+ strips=[]
+ if self.use_strips:
+ while 1:
+ best=5
+ face=None
+ for f in faces:
+ if f.flag:
+ continue
+ score=0
+ for e in f.edges:
+ other=e.other_face(f)
+ if other and other.smooth_group.index==f.smooth_group.index and not other.flag:
+ score+=1
+ if score>0 and score<best:
+ face=f
+ best=score
+ if not face:
+ break
+ strip=self.create_strip(face, self.use_degen_tris and sum([len(s) for s in strips])%2)
+ if strip:
+ strips.append(strip)
+
+ if self.debug:
+ print "%d strips:"%len(strips)
+ for i in range(len(strips)):
+ print " %d: %d indices"%(i, len(strips[i]))
+ print "%d loose faces"%len([f for f in faces if not f.flag])
+ nind=sum([len(s) for s in strips])+sum([len(f.verts) for f in faces if not f.flag])
+ print "%d indices total"%nind
+
+ if self.use_degen_tris:
+ big_strip=[]
+ for s in strips:
+ if big_strip:
+ big_strip+=[big_strip[-1], s[0]]
+ big_strip+=s
+
+ for f in faces:
+ if not f.flag:
+ if len(big_strip)%2:
+ order=(-1, -2, 0, 1)
+ else:
+ order=(0, 1, -1, -2)
+ if big_strip:
+ big_strip+=[big_strip[-1], f.verts[order[0]]]
+ big_strip+=[f.verts[i] for i in order[:len(f.verts)]]
+ f.flag=True
+
+ strips=[big_strip]
+
+ if self.debug:
+ nind=len(big_strip)
+ print "Big strip has %d indices"%len(big_strip)
+
+ if self.debug:
+ print "%.2f indices per triangle"%(float(nind)/ntris)
+ print "Locality before optimization: "+" ".join(["%.3f"%self.get_locality(s) for s in strips])
+
+ if self.optimize_locality and self.use_strips:
+ followers={}
+ for s in strips:
+ followers.update(self.get_followers(s))
+
+ verts2=[]
+ vert=strips[0][0]
+ while 1:
+ vert.flag=True
+ verts2.append(vert)
+
+ next=None
+ if vert.index in followers:
+ flw=followers[vert.index]
+ best=0
+ for n in flw:
+ if flw[n]>best and not verts[n].flag:
+ next=verts[n]
+ best=flw[n]+0.9/abs(vert.index-n)
+
+ if not next:
+ for v in verts:
+ if not v.flag:
+ next=v
+ break
+ if not next:
+ break
+
+ vert=next
+
+ verts=verts2
+
+ for i in range(len(verts)):
+ verts[i].index=i
+
+ if self.debug:
+ print "Locality after optimization: "+" ".join(["%.3f"%self.get_locality(s) for s in strips])
+
+ self.out_file.write("vertices NORMAL3")
+ if mesh.faceUV:
+ self.out_file.write("_TEXCOORD2")
+ self.out_file.write("_VERTEX3\n{\n")
+ norm=None
+ uv=None
+ for v in verts:
+ if v.no!=norm:
+ self.out_file.write("\tnormal3 %f %f %f;\n"%tuple(v.no))
+ norm=v.no
+ if v.uv!=uv:
+ self.out_file.write("\ttexcoord2 %f %f;\n"%tuple(v.uv))
+ uv=v.uv
+ self.out_file.write("\tvertex3 %f %f %f;\n"%tuple(v.co))
self.out_file.write("};\n")
+ for s in strips:
+ self.out_file.write("batch TRIANGLE_STRIP\n{\n\tindices")
+ n=0
+ for v in s:
+ self.out_file.write(" %u"%v.index)
+ n+=1;
+ if n%32==0:
+ self.out_file.write(";\n\tindices")
+ self.out_file.write(";\n};\n")
+
+ first=True
+ for f in faces:
+ if not f.flag:
+ if first:
+ self.out_file.write("batch TRIANGLES\n{\n")
+ first=False
+ for i in range(2, len(f.verts)):
+ self.out_file.write("\tindices %u %u %u;\n"%(f.verts[0].index, f.verts[i-1].index, f.verts[i].index))
+ if not first:
+ self.out_file.write("};\n")
+
class FrontEnd:
def run(self):
- #self.export(None)
- Blender.Window.FileSelector(self.export, "Export MSP GL mesh", Blender.sys.makename(ext='.mesh'))
-
+ self.use_strips=Blender.Draw.Create(True)
+ self.use_degen_tris=Blender.Draw.Create(True)
+ self.optimize_locality=Blender.Draw.Create(True)
+ self.debug=Blender.Draw.Create(False)
+ self.strip_debug=Blender.Draw.Create(False)
+ ret=Blender.Draw.PupBlock("Export MSP GL mesh",
+ [("Use strips", self.use_strips, "Generage OpenGL triangle strips"),
+ ("Use degen tris", self.use_degen_tris, "Use degenerate triangles to combine triangle strips"),
+ ("Optimize locality", self.optimize_locality),
+ ("Debugging options"),
+ ("Debug", self.debug),
+ ("Debug strips", self.strip_debug)])
+ if ret:
+ Blender.Window.FileSelector(self.export, "Export MSP GL mesh", Blender.sys.makename(ext='.mesh'))
+
+ def draw(self):
+ pass
+
def export(self, fn):
exp=Exporter(fn)
+ exp.use_strips=self.use_strips.val
+ exp.use_degen_tris=self.use_degen_tris.val
+ exp.optimize_locality=self.optimize_locality.val
+ exp.debug=self.debug.val
+ exp.strip_debug=self.strip_debug.val
exp.export()
+
if __name__=="__main__":
fe=FrontEnd()
fe.run()
projects / libs / gl.git / blobdiff