- self.out_file=file(fn, "w")
- self.use_strips=True
- self.use_degen_tris=True
- self.optimize_locality=True
- self.export_lines=True
- self.debug=False
- self.strip_debug=False
- self.split_debug=False
-
- 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
+ self.file = open(fn, "w")
+ self.indent = 0
+
+ def make(self, kwd, *params):
+ pstr = ""
+ for p in params:
+ if type(p)==float:
+ pstr += " %.6g"%p
+ else:
+ pstr += " %s"%p
+ return "%s%s"%(kwd, pstr)
+
+ def write(self, kwd, *params):
+ self.file.write("%s%s;\n"%('\t'*self.indent, self.make(kwd, *params)))
+
+ def begin(self, kwd, *params):
+ i = '\t'*self.indent
+ self.file.write("%s%s\n%s{\n"%(i, self.make(kwd, *params), i))
+ self.indent += 1
+
+ def end(self):
+ self.indent -= 1
+ self.file.write("%s};\n"%('\t'*self.indent))
+
+
+class Exporter:
+ def __init__(self, fn):
+ self.out_file = OutFile(fn)
+ self.use_strips = True
+ self.use_degen_tris = True
+ self.max_strip_len = 1024
+ self.optimize_cache = False
+ self.cache_size = 64
+ self.export_lines = True
+ self.tbn_vecs = False
+ self.compound = False
+ self.object = False
+ self.material_tex = False
+ self.debug = False
+ self.strip_debug = False
+ self.split_debug = False
+
+ def stripify(self, mesh):
+ for f in mesh.faces:
+ f.flag = False
+
+ strips = []
+
+ while 1:
+ best = 5
+ face = None
+ for f in mesh.faces:
+ if f.flag:
+ continue
+ score = 0
+ for e in f.edges:
+ other = e.other_face(f)
+ if other and not other.flag:
+ score += 1
+ if score>0 and score<best:
+ face = f
+ best = score
+
+ if not face:
+ break
+
+ strip = mesh.create_strip(face, self.max_strip_len, self.strip_debug)
+ if strip:
+ strips.append(strip)
+
+ loose = [f for f in mesh.faces if not f.flag]
+
+ 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 mesh.faces if not f.flag])
+ nind = sum([len(s) for s in strips])+sum([len(f.verts) for f in loose])
+ print "%d indices total"%nind
+
+ if self.use_degen_tris and strips:
+ big_strip = []
+
+ cache = None
+ total_hits = 0
+ if self.optimize_cache:
+ cache = VertexCache(self.cache_size)
+
+ while strips:
+ best = 0
+ if cache:
+ best_hits = 0
+ for i in range(len(strips)):
+ hits = cache.test_strip(strips[i])
+ if hits>best_hits:
+ best = i
+ best_hits = hits
+
+ s = strips[best]
+
+ if big_strip:
+ glue = [big_strip[-1], s[0]]
+ if len(big_strip)%2:
+ glue += [s[0]]
+
+ big_strip += glue
+ if cache:
+ total_hits += cache.fetch_strip(glue)
+
+ big_strip += s
+ if cache:
+ total_hits += cache.fetch_strip(s)
+
+ del strips[best]
+
+ for f in loose:
+ if len(big_strip)%2:
+ order = (-1, -2, 0, 1)