Cura/util/meshLoaders/dae.py

   1 from __future__ import absolute_import
   2 __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
   3
   4 from  xml.parsers.expat import ParserCreate
   5
   6 from Cura.util import mesh
   7
   8 def loadScene(filename):
   9         loader = daeLoader(filename)
  10         return [loader.obj]
  11
  12 class daeLoader(object):
  13         def __init__(self, filename):
  14                 self.obj = mesh.printableObject()
  15                 self.mesh = self.obj._addMesh()
  16
  17                 r = ParserCreate()
  18                 r.StartElementHandler = self._StartElementHandler
  19                 r.EndElementHandler = self._EndElementHandler
  20                 r.CharacterDataHandler = self._CharacterDataHandler
  21
  22                 self._base = {}
  23                 self._cur = self._base
  24                 self._idMap = {}
  25                 self._geometryList = []
  26                 self._faceCount = 0
  27                 r.ParseFile(open(filename, "r"))
  28
  29                 self.vertexCount = 0
  30                 for instance_visual_scene in self._base['collada'][0]['scene'][0]['instance_visual_scene']:
  31                         for node in self._idMap[instance_visual_scene['_url']]['node']:
  32                                 self._ProcessNode1(node)
  33                 self.mesh._prepareFaceCount(self._faceCount)
  34                 for instance_visual_scene in self._base['collada'][0]['scene'][0]['instance_visual_scene']:
  35                         for node in self._idMap[instance_visual_scene['_url']]['node']:
  36                                 self._ProcessNode2(node)
  37
  38                 scale = float(self._base['collada'][0]['asset'][0]['unit'][0]['_meter']) * 1000
  39                 self.mesh.vertexes *= scale
  40
  41                 self._base = None
  42                 self._cur = None
  43                 self._idMap = None
  44
  45                 self.obj._postProcessAfterLoad()
  46
  47         def _ProcessNode1(self, node):
  48                 if 'node' in node:
  49                         for n in node['node']:
  50                                 self._ProcessNode1(n)
  51                 if 'instance_geometry' in node:
  52                         for instance_geometry in node['instance_geometry']:
  53                                 mesh = self._idMap[instance_geometry['_url']]['mesh'][0]
  54                                 if 'triangles' in mesh:
  55                                         for triangles in mesh['triangles']:
  56                                                 self._faceCount += int(triangles['_count'])
  57                                 elif 'lines' in mesh:
  58                                         pass #Ignore lines
  59                                 else:
  60                                         print mesh.keys()
  61                 if 'instance_node' in node:
  62                         for instance_node in node['instance_node']:
  63                                 self._ProcessNode1(self._idMap[instance_node['_url']])
  64
  65         def _ProcessNode2(self, node, matrix = None):
  66                 if 'matrix' in node:
  67                         oldMatrix = matrix
  68                         matrix = map(float, node['matrix'][0]['__data'].split())
  69                         if oldMatrix is not None:
  70                                 newMatrix = [0]*16
  71                                 newMatrix[0] = oldMatrix[0] * matrix[0] + oldMatrix[1] * matrix[4] + oldMatrix[2] * matrix[8] + oldMatrix[3] * matrix[12]
  72                                 newMatrix[1] = oldMatrix[0] * matrix[1] + oldMatrix[1] * matrix[5] + oldMatrix[2] * matrix[9] + oldMatrix[3] * matrix[13]
  73                                 newMatrix[2] = oldMatrix[0] * matrix[2] + oldMatrix[1] * matrix[6] + oldMatrix[2] * matrix[10] + oldMatrix[3] * matrix[14]
  74                                 newMatrix[3] = oldMatrix[0] * matrix[3] + oldMatrix[1] * matrix[7] + oldMatrix[2] * matrix[11] + oldMatrix[3] * matrix[15]
  75                                 newMatrix[4] = oldMatrix[4] * matrix[0] + oldMatrix[5] * matrix[4] + oldMatrix[6] * matrix[8] + oldMatrix[7] * matrix[12]
  76                                 newMatrix[5] = oldMatrix[4] * matrix[1] + oldMatrix[5] * matrix[5] + oldMatrix[6] * matrix[9] + oldMatrix[7] * matrix[13]
  77                                 newMatrix[6] = oldMatrix[4] * matrix[2] + oldMatrix[5] * matrix[6] + oldMatrix[6] * matrix[10] + oldMatrix[7] * matrix[14]
  78                                 newMatrix[7] = oldMatrix[4] * matrix[3] + oldMatrix[5] * matrix[7] + oldMatrix[6] * matrix[11] + oldMatrix[7] * matrix[15]
  79                                 newMatrix[8] = oldMatrix[8] * matrix[0] + oldMatrix[9] * matrix[4] + oldMatrix[10] * matrix[8] + oldMatrix[11] * matrix[12]
  80                                 newMatrix[9] = oldMatrix[8] * matrix[1] + oldMatrix[9] * matrix[5] + oldMatrix[10] * matrix[9] + oldMatrix[11] * matrix[13]
  81                                 newMatrix[10] = oldMatrix[8] * matrix[2] + oldMatrix[9] * matrix[6] + oldMatrix[10] * matrix[10] + oldMatrix[11] * matrix[14]
  82                                 newMatrix[11] = oldMatrix[8] * matrix[3] + oldMatrix[9] * matrix[7] + oldMatrix[10] * matrix[11] + oldMatrix[11] * matrix[15]
  83                                 newMatrix[12] = oldMatrix[12] * matrix[0] + oldMatrix[13] * matrix[4] + oldMatrix[14] * matrix[8] + oldMatrix[15] * matrix[12]
  84                                 newMatrix[13] = oldMatrix[12] * matrix[1] + oldMatrix[13] * matrix[5] + oldMatrix[14] * matrix[9] + oldMatrix[15] * matrix[13]
  85                                 newMatrix[14] = oldMatrix[12] * matrix[2] + oldMatrix[13] * matrix[6] + oldMatrix[14] * matrix[10] + oldMatrix[15] * matrix[14]
  86                                 newMatrix[15] = oldMatrix[12] * matrix[3] + oldMatrix[13] * matrix[7] + oldMatrix[14] * matrix[11] + oldMatrix[15] * matrix[15]
  87                                 matrix = newMatrix
  88                 if 'node' in node:
  89                         for n in node['node']:
  90                                 self._ProcessNode2(n, matrix)
  91                 if 'instance_geometry' in node:
  92                         for instance_geometry in node['instance_geometry']:
  93                                 mesh = self._idMap[instance_geometry['_url']]['mesh'][0]
  94
  95                                 if 'triangles' in mesh:
  96                                         for triangles in mesh['triangles']:
  97                                                 for input in triangles['input']:
  98                                                         if input['_semantic'] == 'VERTEX':
  99                                                                 vertices = self._idMap[input['_source']]
 100                                                 for input in vertices['input']:
 101                                                         if input['_semantic'] == 'POSITION':
 102                                                                 vertices = self._idMap[input['_source']]
 103                                                 indexList = map(int, triangles['p'][0]['__data'].split())
 104                                                 positionList = map(float, vertices['float_array'][0]['__data'].split())
 105
 106                                                 faceCount = int(triangles['_count'])
 107                                                 stepSize = len(indexList) / (faceCount * 3)
 108                                                 for i in xrange(0, faceCount):
 109                                                         idx0 = indexList[((i * 3) + 0) * stepSize]
 110                                                         idx1 = indexList[((i * 3) + 1) * stepSize]
 111                                                         idx2 = indexList[((i * 3) + 2) * stepSize]
 112                                                         x0 = positionList[idx0*3]
 113                                                         y0 = positionList[idx0*3+1]
 114                                                         z0 = positionList[idx0*3+2]
 115                                                         x1 = positionList[idx1*3]
 116                                                         y1 = positionList[idx1*3+1]
 117                                                         z1 = positionList[idx1*3+2]
 118                                                         x2 = positionList[idx2*3]
 119                                                         y2 = positionList[idx2*3+1]
 120                                                         z2 = positionList[idx2*3+2]
 121                                                         if matrix is not None:
 122                                                                 self.mesh._addFace(
 123                                                                         x0 * matrix[0] + y0 * matrix[1] + z0 * matrix[2] + matrix[3], x0 * matrix[4] + y0 * matrix[5] + z0 * matrix[6] + matrix[7], x0 * matrix[8] + y0 * matrix[9] + z0 * matrix[10] + matrix[11],
 124                                                                         x1 * matrix[0] + y1 * matrix[1] + z1 * matrix[2] + matrix[3], x1 * matrix[4] + y1 * matrix[5] + z1 * matrix[6] + matrix[7], x1 * matrix[8] + y1 * matrix[9] + z1 * matrix[10] + matrix[11],
 125                                                                         x2 * matrix[0] + y2 * matrix[1] + z2 * matrix[2] + matrix[3], x2 * matrix[4] + y2 * matrix[5] + z2 * matrix[6] + matrix[7], x2 * matrix[8] + y2 * matrix[9] + z2 * matrix[10] + matrix[11]
 126                                                                 )
 127                                                         else:
 128                                                                 self.mesh._addFace(x0, y0, z0, x1, y1, z1, x2, y2, z2)
 129                 if 'instance_node' in node:
 130                         for instance_node in node['instance_node']:
 131                                 self._ProcessNode2(self._idMap[instance_node['_url']], matrix)
 132
 133         def _StartElementHandler(self, name, attributes):
 134                 name = name.lower()
 135                 if not name in self._cur:
 136                         self._cur[name] = []
 137                 new = {'__name': name, '__parent': self._cur}
 138                 self._cur[name].append(new)
 139                 self._cur = new
 140                 for k in attributes.keys():
 141                         self._cur['_' + k] = attributes[k]
 142
 143                 if 'id' in attributes:
 144                         self._idMap['#' + attributes['id']] = self._cur
 145
 146         def _EndElementHandler(self, name):
 147                 self._cur = self._cur['__parent']
 148
 149         def _CharacterDataHandler(self, data):
 150                 if len(data.strip()) < 1:
 151                         return
 152                 if '__data' in self._cur:
 153                         self._cur['__data'] += data
 154                 else:
 155                         self._cur['__data'] = data
 156
 157         def _GetWithKey(self, item, basename, key, value):
 158                 input = basename
 159                 while input in item:
 160                         if item[basename]['_'+key] == value:
 161                                 return self._idMap[item[input]['_source']]
 162                         basename += "!"