Cura/util/dae.py

   1 import sys, math, re, os, struct, time
   2 from  xml.parsers.expat import ParserCreate
   3
   4 import mesh
   5
   6 class daeModel(mesh.mesh):
   7         def __init__(self):
   8                 super(daeModel, self).__init__()
   9
  10         def load(self, filename):
  11                 r = ParserCreate()
  12                 r.StartElementHandler = self._StartElementHandler
  13                 r.EndElementHandler = self._EndElementHandler
  14                 r.CharacterDataHandler = self._CharacterDataHandler
  15
  16                 self._base = {}
  17                 self._cur = self._base
  18                 self._idMap = {}
  19                 self._geometryList = []
  20                 r.ParseFile(open(filename, "r"))
  21
  22                 self.vertexCount = 0
  23                 for instance_visual_scene in self._base['collada'][0]['scene'][0]['instance_visual_scene']:
  24                         for node in self._idMap[instance_visual_scene['_url']]['node']:
  25                                 self._ProcessNode1(node)
  26                 self._prepareVertexCount(self.vertexCount)
  27                 for instance_visual_scene in self._base['collada'][0]['scene'][0]['instance_visual_scene']:
  28                         for node in self._idMap[instance_visual_scene['_url']]['node']:
  29                                 self._ProcessNode2(node)
  30
  31                 self._base = None
  32                 self._cur = None
  33                 self._idMap = None
  34
  35                 self._postProcessAfterLoad()
  36                 return self
  37
  38         def _ProcessNode1(self, node):
  39                 if 'node' in node:
  40                         for n in node['node']:
  41                                 self._ProcessNode1(n)
  42                 if 'instance_geometry' in node:
  43                         for instance_geometry in node['instance_geometry']:
  44                                 mesh = self._idMap[instance_geometry['_url']]['mesh'][0]
  45                                 if 'triangles' in mesh:
  46                                         for triangles in mesh['triangles']:
  47                                                 self.vertexCount += int(triangles['_count']) * 3
  48                                 elif 'lines' in mesh:
  49                                         pass #Ignore lines
  50                                 else:
  51                                         print mesh.keys()
  52                 if 'instance_node' in node:
  53                         for instance_node in node['instance_node']:
  54                                 self._ProcessNode1(self._idMap[instance_node['_url']])
  55
  56         def _ProcessNode2(self, node, matrix = None):
  57                 if 'matrix' in node:
  58                         oldMatrix = matrix
  59                         matrix = map(float, node['matrix'][0]['__data'].split())
  60                         if oldMatrix != None:
  61                                 newMatrix = [0]*16
  62                                 newMatrix[0] = oldMatrix[0] * matrix[0] + oldMatrix[1] * matrix[4] + oldMatrix[2] * matrix[8] + oldMatrix[3] * matrix[12]
  63                                 newMatrix[1] = oldMatrix[0] * matrix[1] + oldMatrix[1] * matrix[5] + oldMatrix[2] * matrix[9] + oldMatrix[3] * matrix[13]
  64                                 newMatrix[2] = oldMatrix[0] * matrix[2] + oldMatrix[1] * matrix[6] + oldMatrix[2] * matrix[10] + oldMatrix[3] * matrix[14]
  65                                 newMatrix[3] = oldMatrix[0] * matrix[3] + oldMatrix[1] * matrix[7] + oldMatrix[2] * matrix[11] + oldMatrix[3] * matrix[15]
  66                                 newMatrix[4] = oldMatrix[4] * matrix[0] + oldMatrix[5] * matrix[4] + oldMatrix[6] * matrix[8] + oldMatrix[7] * matrix[12]
  67                                 newMatrix[5] = oldMatrix[4] * matrix[1] + oldMatrix[5] * matrix[5] + oldMatrix[6] * matrix[9] + oldMatrix[7] * matrix[13]
  68                                 newMatrix[6] = oldMatrix[4] * matrix[2] + oldMatrix[5] * matrix[6] + oldMatrix[6] * matrix[10] + oldMatrix[7] * matrix[14]
  69                                 newMatrix[7] = oldMatrix[4] * matrix[3] + oldMatrix[5] * matrix[7] + oldMatrix[6] * matrix[11] + oldMatrix[7] * matrix[15]
  70                                 newMatrix[8] = oldMatrix[8] * matrix[0] + oldMatrix[9] * matrix[4] + oldMatrix[10] * matrix[8] + oldMatrix[11] * matrix[12]
  71                                 newMatrix[9] = oldMatrix[8] * matrix[1] + oldMatrix[9] * matrix[5] + oldMatrix[10] * matrix[9] + oldMatrix[11] * matrix[13]
  72                                 newMatrix[10] = oldMatrix[8] * matrix[2] + oldMatrix[9] * matrix[6] + oldMatrix[10] * matrix[10] + oldMatrix[11] * matrix[14]
  73                                 newMatrix[11] = oldMatrix[8] * matrix[3] + oldMatrix[9] * matrix[7] + oldMatrix[10] * matrix[11] + oldMatrix[11] * matrix[15]
  74                                 newMatrix[12] = oldMatrix[12] * matrix[0] + oldMatrix[13] * matrix[4] + oldMatrix[14] * matrix[8] + oldMatrix[15] * matrix[12]
  75                                 newMatrix[13] = oldMatrix[12] * matrix[1] + oldMatrix[13] * matrix[5] + oldMatrix[14] * matrix[9] + oldMatrix[15] * matrix[13]
  76                                 newMatrix[14] = oldMatrix[12] * matrix[2] + oldMatrix[13] * matrix[6] + oldMatrix[14] * matrix[10] + oldMatrix[15] * matrix[14]
  77                                 newMatrix[15] = oldMatrix[12] * matrix[3] + oldMatrix[13] * matrix[7] + oldMatrix[14] * matrix[11] + oldMatrix[15] * matrix[15]
  78                                 matrix = newMatrix
  79                 if 'node' in node:
  80                         for n in node['node']:
  81                                 self._ProcessNode2(n, matrix)
  82                 if 'instance_geometry' in node:
  83                         for instance_geometry in node['instance_geometry']:
  84                                 mesh = self._idMap[instance_geometry['_url']]['mesh'][0]
  85
  86                                 if 'triangles' in mesh:
  87                                         for triangles in mesh['triangles']:
  88                                                 for input in triangles['input']:
  89                                                         if input['_semantic'] == 'VERTEX':
  90                                                                 vertices = self._idMap[input['_source']]
  91                                                 for input in vertices['input']:
  92                                                         if input['_semantic'] == 'POSITION':
  93                                                                 vertices = self._idMap[input['_source']]
  94                                                 indexList = map(int, triangles['p'][0]['__data'].split())
  95                                                 positionList = map(float, vertices['float_array'][0]['__data'].split())
  96
  97                                                 vertexCount = int(triangles['_count']) * 3
  98                                                 stepSize = len(indexList) / vertexCount
  99                                                 for i in xrange(0, vertexCount):
 100                                                         idx = indexList[i * stepSize]
 101                                                         if matrix != None:
 102                                                                 x = positionList[idx*3]
 103                                                                 y = positionList[idx*3+1]
 104                                                                 z = positionList[idx*3+2]
 105                                                                 self.addVertex(x * matrix[0] + y * matrix[1] + z * matrix[2] + matrix[3], x * matrix[4] + y * matrix[5] + z * matrix[6] + matrix[7], x * matrix[8] + y * matrix[9] + z * matrix[10] + matrix[11])
 106                                                         else:
 107                                                                 self.addVertex(positionList[idx*3], positionList[idx*3+1], positionList[idx*3+2])
 108                 if 'instance_node' in node:
 109                         for instance_node in node['instance_node']:
 110                                 self._ProcessNode2(self._idMap[instance_node['_url']], matrix)
 111
 112         def _StartElementHandler(self, name, attributes):
 113                 name = name.lower()
 114                 if not name in self._cur:
 115                         self._cur[name] = []
 116                 new = {'__name': name, '__parent': self._cur}
 117                 self._cur[name].append(new)
 118                 self._cur = new
 119                 for k in attributes.keys():
 120                         self._cur['_' + k] = attributes[k]
 121
 122                 if 'id' in attributes:
 123                         self._idMap['#' + attributes['id']] = self._cur
 124
 125         def _EndElementHandler(self, name):
 126                 self._cur = self._cur['__parent']
 127
 128         def _CharacterDataHandler(self, data):
 129                 if len(data.strip()) < 1:
 130                         return
 131                 if '__data' in self._cur:
 132                         self._cur['__data'] += data
 133                 else:
 134                         self._cur['__data'] = data
 135
 136         def _GetWithKey(self, item, basename, key, value):
 137                 input = basename
 138                 while input in item:
 139                         if item[basename]['_'+key] == value:
 140                                 return self._idMap[item[input]['_source']]
 141                         basename += "!"