#################################################################### # # # THIS FILE IS PART OF THE pycollada LIBRARY SOURCE CODE. # # USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS # # GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE # # IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. # # # # THE pycollada SOURCE CODE IS (C) COPYRIGHT 2011 # # by Jeff Terrace and contributors # # # #################################################################### """Module containing classes and functions for the primitive.""" import numpy from collada import primitive from collada.util import toUnitVec, checkSource, xrange from collada.common import E, tag from collada.common import DaeIncompleteError, DaeBrokenRefError, \ DaeMalformedError, DaeUnsupportedError from collada.xmlutil import etree as ElementTree class Line(object): """Single line representation. Represents the line between two points ``(x0,y0,z0)`` and ``(x1,y1,z1)``. A Line is read-only.""" def __init__(self, indices, vertices, normals, texcoords, material): """A Line should not be created manually.""" self.vertices = vertices """A (2, 3) numpy float array containing the endpoints of the line""" self.normals = normals """A (2, 3) numpy float array with the normals for the endpoints of the line. Can be None.""" self.texcoords = texcoords """A tuple where entries are numpy float arrays of size (2, 2) containing the texture coordinates for the endpoints of the line for each texture coordinate set. Can be length 0 if there are no texture coordinates.""" self.material = material """If coming from an unbound :class:`collada.lineset.LineSet`, contains a string with the material symbol. If coming from a bound :class:`collada.lineset.BoundLineSet`, contains the actual :class:`collada.material.Effect` the line is bound to.""" self.indices = indices # Note: we can't generate normals for lines if there are none def __repr__(self): return ''%(str(self.vertices[0]), str(self.vertices[1]), str(self.material)) def __str__(self): return repr(self) class LineSet(primitive.Primitive): """Class containing the data COLLADA puts in a tag, a collection of lines. The LineSet object is read-only. To modify a LineSet, create a new instance using :meth:`collada.geometry.Geometry.createLineSet`. * If ``L`` is an instance of :class:`collada.lineset.LineSet`, then ``len(L)`` returns the number of lines in the set. ``L[i]`` returns the i\\ :sup:`th` line in the set.""" def __init__(self, sources, material, index, xmlnode=None): """A LineSet should not be created manually. Instead, call the :meth:`collada.geometry.Geometry.createLineSet` method after creating a geometry instance. """ if len(sources) == 0: raise DaeIncompleteError('A line set needs at least one input for vertex positions') if not sources.get('VERTEX'): raise DaeIncompleteError('Line set requires vertex input') #find max offset max_offset = max([ max([input[0] for input in input_type_array]) for input_type_array in sources.values() if len(input_type_array) > 0]) self.sources = sources self.material = material self.index = index self.indices = self.index self.nindices = max_offset + 1 self.index.shape = (-1, 2, self.nindices) self.nlines = len(self.index) if len(self.index) > 0: self._vertex = sources['VERTEX'][0][4].data self._vertex_index = self.index[:,:, sources['VERTEX'][0][0]] self.maxvertexindex = numpy.max( self._vertex_index ) checkSource(sources['VERTEX'][0][4], ('X', 'Y', 'Z'), self.maxvertexindex) else: self._vertex = None self._vertex_index = None self.maxvertexindex = -1 if 'NORMAL' in sources and len(sources['NORMAL']) > 0 \ and len(self.index) > 0: self._normal = sources['NORMAL'][0][4].data self._normal_index = self.index[:,:, sources['NORMAL'][0][0]] self.maxnormalindex = numpy.max( self._normal_index ) checkSource(sources['NORMAL'][0][4], ('X', 'Y', 'Z'), self.maxnormalindex) else: self._normal = None self._normal_index = None self.maxnormalindex = -1 if 'TEXCOORD' in sources and len(sources['TEXCOORD']) > 0 \ and len(self.index) > 0: self._texcoordset = tuple([texinput[4].data for texinput in sources['TEXCOORD']]) self._texcoord_indexset = tuple([ self.index[:,:, sources['TEXCOORD'][i][0]] for i in xrange(len(sources['TEXCOORD'])) ]) self.maxtexcoordsetindex = [numpy.max(tex_index) for tex_index in self._texcoord_indexset] for i, texinput in enumerate(sources['TEXCOORD']): checkSource(texinput[4], ('S', 'T'), self.maxtexcoordsetindex[i]) else: self._texcoordset = tuple() self._texcoord_indexset = tuple() self.maxtexcoordsetindex = -1 if xmlnode is not None: self.xmlnode = xmlnode """ElementTree representation of the line set.""" else: self.index.shape = (-1) acclen = len(self.index) txtindices = ' '.join(map(str, self.index.tolist())) self.index.shape = (-1, 2, self.nindices) self.xmlnode = E.lines(count=str(self.nlines), material=self.material) all_inputs = [] for semantic_list in self.sources.values(): all_inputs.extend(semantic_list) for offset, semantic, sourceid, set, src in all_inputs: inpnode = E.input(offset=str(offset), semantic=semantic, source=sourceid) if set is not None: inpnode.set('set', str(set)) self.xmlnode.append(inpnode) self.xmlnode.append(E.p(txtindices)) def __len__(self): """The number of lines in this line set.""" return len(self.index) def __getitem__(self, i): v = self._vertex[ self._vertex_index[i] ] if self._normal is None: n = None else: n = self._normal[ self._normal_index[i] ] uv = [] for j, uvindex in enumerate(self._texcoord_indexset): uv.append( self._texcoordset[j][ uvindex[i] ] ) return Line(self._vertex_index[i], v, n, uv, self.material) @staticmethod def load( collada, localscope, node ): indexnode = node.find(collada.tag('p')) if indexnode is None: raise DaeIncompleteError('Missing index in line set') source_array = primitive.Primitive._getInputs(collada, localscope, node.findall(collada.tag('input'))) try: if indexnode.text is None or indexnode.text.isspace(): index = numpy.array([], dtype=numpy.int32) else: index = numpy.fromstring(indexnode.text, dtype=numpy.int32, sep=' ') index[numpy.isnan(index)] = 0 except: raise DaeMalformedError('Corrupted index in line set') lineset = LineSet(source_array, node.get('material'), index, node) lineset.xmlnode = node return lineset def bind(self, matrix, materialnodebysymbol): """Create a bound line set from this line set, transform and material mapping""" return BoundLineSet( self, matrix, materialnodebysymbol) def __str__(self): return '' % len(self) def __repr__(self): return str(self) class BoundLineSet(primitive.BoundPrimitive): """A line set bound to a transform matrix and materials mapping. * If ``bs`` is an instance of :class:`collada.lineset.BoundLineSet`, ``len(bs)`` returns the number of lines in the set and ``bs[i]`` returns the i\\ :superscript:`th` line in the set. """ def __init__(self, ls, matrix, materialnodebysymbol): """Create a bound line set from a line set, transform and material mapping. This gets created when a line set is instantiated in a scene. Do not create this manually.""" M = numpy.asmatrix(matrix).transpose() self._vertex = None if ls._vertex is not None: self._vertex = numpy.asarray(ls._vertex * M[:3,:3]) + matrix[:3,3] self._normal = None if ls._normal is not None: self._normal = numpy.asarray(ls._normal * M[:3,:3]) self._texcoordset = ls._texcoordset matnode = materialnodebysymbol.get( ls.material ) if matnode: self.material = matnode.target self.inputmap = dict([ (sem, (input_sem, set)) for sem, input_sem, set in matnode.inputs ]) else: self.inputmap = self.material = None self.index = ls.index self._vertex_index = ls._vertex_index self._normal_index = ls._normal_index self._texcoord_indexset = ls._texcoord_indexset self.nlines = ls.nlines self.original = ls def __len__(self): return len(self.index) def __getitem__(self, i): v = self._vertex[ self._vertex_index[i] ] if self._normal is None: n = None else: n = self._normal[ self._normal_index[i] ] uv = [] for j, uvindex in enumerate(self._texcoord_indexset): uv.append( self._texcoordset[j][ uvindex[i] ] ) return Line(self._vertex_index[i], v, n, uv, self.material) def lines(self): """Iterate through all the lines contained in the set. :rtype: generator of :class:`collada.lineset.Line` """ for i in xrange(self.nlines): yield self[i] def shapes(self): """Iterate through all the lines contained in the set. :rtype: generator of :class:`collada.lineset.Line` """ return self.lines() def __str__(self): return '' % len(self) def __repr__(self): return str(self)