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from ed2d import material |
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class MTL(object): |
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def __init__(self, filename): |
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''' Wavefront .mtl file parser. ''' |
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self.data = {} |
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self.material = material.Material() |
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# The file name is passed in with the full path via OBJ parser. |
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self.__load(filename) |
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def __load(self, filename): |
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materialName = None |
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value = None |
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valueType = None |
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for line in open(filename, "r"): |
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# Avoid lines starting with "#" |
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if line.startswith('#'): |
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continue |
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else: |
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value = line.split() |
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# Make sure the line is no empty |
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if not value: |
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continue |
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else: |
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valueType = value[0] |
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# Check for material |
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if valueType == 'newmtl': |
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# Store current material and make it active |
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self.material = self.data[value[1]] = material.Material() |
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materialName = value[1] |
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continue |
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elif self.material is None: |
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print("Error, material member is None.") |
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break |
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# Generate a list of floats using the numbers |
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value = list(map(float, value[1:])) |
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if valueType == 'Ns': |
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# Material Specular Exponent which is multipled by texture value |
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self.data[materialName].ispecular = value[0] |
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elif valueType == 'Ka': |
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# Ambient color |
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self.data[materialName].ambient = [value[0], value[1], value[2]] |
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elif valueType == 'Kd': |
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# Diffuse color |
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self.data[materialName].diffuse = [value[0], value[1], value[2]] |
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elif valueType == 'Ks': |
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# Specular color |
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self.data[materialName].specular = [value[0], value[1], value[2]] |
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elif valueType == 'Ke': |
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# Emission color |
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self.data[materialName].emission = [value[0], value[1], value[2]] |
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elif valueType == 'Ni': |
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# Optical Denisty or Index of Refraction |
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self.data[materialName].IOR = value[0] |
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elif valueType == 'map_Kd': |
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# Diffuse texture is multiplied by the Kd |
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self.data[materialName].albedoLayers['test'] = value[0] |
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# Do texture stuff here |
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elif valueType == 'map_Ks': |
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# Specular texture is multiplied by the Ks |
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self.data[materialName].specularMapLayers['test'] = value[0] |
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elif valueType == 'map_Ns': |
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# Texture linked to the specular exponent and is multiplied by Ns |
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pass |
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# NOTE: |
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''' |
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During rendering, the Ka, Kd, and Ks values and the map_Ka, map_Kd, and map_Ks values are blended according to the following formula: |
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result_color=tex_color(tv)*decal(tv)+mtl_color*(1.0-decal(tv)) |
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where tv is the texture vertex. |
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"result_color" is the blended Ka, Kd, and Ks values. |
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''' |
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explosiveduck /
ed2d
