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from ed2d.assets.mtlloader import MTL |
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from ed2d import files |
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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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objPath = files.resolve_path('data', 'models', fileName + '.obj') |
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self.fmvnig = {} |
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# Shared temporary storage of data |
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self.tempVertices = [] |
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self.tempNormals = [] |
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self.tempUVs = [] |
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# Load the obj file |
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with open(objPath, 'r') as objfile: |
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self.lines = objfile.readlines() |
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self.parse() |
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def parse(self): |
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''' Perform the parsing of the obj format ''' |
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matname = None |
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lastType = None |
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valueType = None |
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for line in self.lines: |
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lastType = valueType |
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valueType, value = line.strip().split(' ', 1) |
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# Don't bother unless the following key words exist in the line |
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if valueType not in ['o', 'g', 'f', 'v', 'vt', 'vn', 'usemtl', 'mtllib']: |
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continue |
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value = value.split(' ') |
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# Check first and continue on early because of string splitting |
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if valueType == "usemtl": |
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matname = value[0] |
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continue |
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if valueType in ['g', 'o']: |
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# These objects reset state basically |
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matname = None |
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continue |
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if valueType == 'mtllib': |
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mtlpath = files.resolve_path('data', 'models', value[0]) |
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# Load the mtl file |
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self.mtlfile = MTL(mtlpath) |
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for material in self.mtlfile.data.keys(): |
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self.fmvnig[material] = [ [], [], [] ] |
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continue |
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if valueType == "f": |
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face = [item.split("/") for item in value] |
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for typeGroup in face: |
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for typeIndex in range(len(typeGroup)): |
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if typeIndex == 0: # Vertex |
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typeSource = self.tempVertices |
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elif typeIndex == 1: # UV |
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typeSource = self.tempUVs |
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elif typeIndex == 2: # Normal |
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typeSource = self.tempNormals |
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index = typeGroup[typeIndex] |
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# Make sure data exists |
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if index != '': |
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index = int(index) |
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typeData = typeSource[index - 1] |
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self.fmvnig[matname][typeIndex].append(typeData) |
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continue |
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# Map the values after the keyword to floats |
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value = list(map(float, value)) |
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if valueType == "v": |
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self.tempVertices.append(value) |
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elif valueType == "vt": |
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self.tempUVs.append(value * 2) |
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elif valueType == "vn": |
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self.tempNormals.append(value) |
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explosiveduck /
ed2d
