def triangleset(self):
"""This performs a simple triangulation of the polylist using the fanning method.
:rtype: :class:`collada.triangleset.TriangleSet`
"""
if self._triangleset is None:
indexselector = numpy.zeros(self.nvertices) == 0
indexselector[self.polyindex[:, 1] - 1] = False
indexselector[self.polyindex[:, 1] - 2] = False
indexselector = numpy.arange(self.nvertices)[indexselector]
firstpolyindex = numpy.arange(self.nvertices)
firstpolyindex = firstpolyindex - numpy.repeat(
self.polyends - self.vcounts, self.vcounts)
firstpolyindex = firstpolyindex[indexselector]
if len(self.index) > 0:
triindex = numpy.dstack(
(self.index[indexselector - firstpolyindex],
self.index[indexselector + 1],
self.index[indexselector + 2]))
triindex = numpy.swapaxes(triindex, 1, 2).flatten()
else:
triindex = numpy.array([], dtype=self.index.dtype)
triset = triangleset.TriangleSet(self.sources, self.material,
triindex, self.xmlnode)
self._triangleset = triset
return self._triangleset
def createTriangleSet(self, indices, inputlist, materialid):
"""Create a set of triangles for use in this geometry instance.
:param numpy.array indices:
unshaped numpy array that contains the indices for
the inputs referenced in inputlist
:param collada.source.InputList inputlist:
The inputs for this primitive
:param str materialid:
A string containing a symbol that will get used to bind this triangleset
to a material when instantiating into a scene
:rtype: :class:`collada.triangleset.TriangleSet`
"""
inputdict = primitive.Primitive._getInputsFromList(self.collada, self.sourceById, inputlist.getList())
return triangleset.TriangleSet(inputdict, materialid, indices)