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from ed2d.mesh import MeshBase |
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from ed2d.assets.mtlloader import MTL |
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class OBJ(object): |
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def __init__(self, fileName): |
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''' Wavefront .obj file parser.''' |
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fcount = 0 |
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vcount = 0 |
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vtcount = 0 |
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vncount = 0 |
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matcount = 0 |
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# Load the file |
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objfile = open(fileName, "r") |
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# Do a head count |
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for line in objfile: |
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value = line[:2] |
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if value == 'f ': |
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fcount += 1 |
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elif value == 'v ': |
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vcount += 1 |
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elif value == 'vt': |
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vtcount += 1 |
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elif value == 'vn': |
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vncount += 1 |
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elif value == 'g ': |
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matcount += 1 |
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fcount *= 3 |
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vcount *= 3 |
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vtcount *= 3 |
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vncount *= 3 |
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self.tempVertices = [None] * vcount |
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self.tempNormals = [None] * vncount |
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self.tempUVs = [None] * fcount |
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self.tempMaterials = [None] * matcount |
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self.vertexIndices = [None] * fcount |
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self.normalIndices = [None] * fcount |
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self.uvIndices = [None] * fcount |
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self.finalVertices = [None] * fcount |
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self.finalNormals = [None] * fcount |
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self.finalUVs = [None] * fcount |
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self.usedMaterials = [None] * matcount |
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self.fnumber = 0 |
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self.vnumber = 0 |
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self.vtnumber = 0 |
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self.vnnumber = 0 |
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self.matnumber = 0 |
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# Process the data |
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self.__process_in_house(objfile) |
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# Finalize |
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self.get_final_data() |
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# Close the file |
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objfile.close() |
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def __process_in_house(self, filename): |
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with open(filename, "r") as objfl: |
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for line in objfl: |
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value = line.split() |
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valueType = value[0] |
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if valueType not in ['f', 'v', 'vt', 'vn', 'g', 'usemtl']: |
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continue |
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value = value[1:] |
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# Check first and continue on early because of string splitting |
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if valueType == "f": |
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temp = [item.split("/") for item in value] |
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for i in range(3): |
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if temp[i][1] != '': |
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self.uvIndices[self.fnumber] = int(temp[i][1]) |
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self.vertexIndices[self.fnumber] = int(temp[i][0]) |
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self.normalIndices[self.fnumber] = int(temp[i][2]) |
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self.fnumber += 1 |
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continue |
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value = list(map(float, value)) |
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if valueType == "v": |
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v = [value[0], value[1], value[2]] |
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self.tempVertices[self.vnumber] = v |
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self.vnumber += 1 |
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elif valueType == "vt": |
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vt = [value[0], value[0]] |
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self.tempUVs[self.vtnumber] = vt |
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self.vtnumber += 1 |
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elif valueType == "vn": |
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n = [value[0], value[1], value[2]] |
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self.tempNormals[self.vnnumber] = n |
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self.vnnumber += 1 |
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elif valueType == "g": |
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g = value[0] |
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self.tempMaterials[self.matnumber] = g |
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self.matnumber += 1 |
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elif valueType == "usemtl": |
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gs = value[0] |
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# Need a way to generate which material per what face |
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# In a specific order |
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self.usedMaterials[sef.matnumber] = gs |
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def get_final_data(self): |
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for i in range(self.fcount): |
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vertexIndex = int(self.vertexIndices[i]) - 1 |
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vertex = self.tempVertices[vertexIndex] |
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self.finalVertices[i] = vertex |
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normalIndex = self.normalIndices[i] |
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normal = self.tempNormals[int(normalIndex) - 1] |
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self.finalNormals[i] = normal |
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if self.uvIndices[0] is None and self.vtcount != 0: |
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uvIndex = self.uvIndices[i] |
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uv = self.tempUVs[int(uvIndex) - 1] |
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self.finalUVs[i] = uv |
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132
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class ObjMesh(MeshBase): |
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def __init__(self, filePath, name, program, vertexLoc, normalLoc): |
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super(ObjMesh, self).__init__(filePath, name, program, vertexLoc, normalLoc) |
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explosiveduck /
ed2d
