84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
#!/usr/bin/env python3
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from .model import ModelParser, Exporter, Vertex, TexCoord, Normal, FaceVertex, Face
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from functools import reduce
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def is_obj(filename):
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return filename[-4:] == '.obj'
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class OBJParser(ModelParser):
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def __init__(self):
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super().__init__()
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self.materials = []
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def parse_line(self, string):
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if string == '':
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return
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split = string.split()
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first = split[0]
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split = split[1:]
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if first == 'usemtl':
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self.currentMaterial = split[0]
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elif first == 'v':
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self.add_vertex(Vertex().from_array(split))
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elif first == 'vn':
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self.add_normal(Normal().from_array(split))
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elif first == 'vt':
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self.add_tex_coord(TexCoord().from_array(split))
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elif first == 'f':
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splits = list(map(lambda x: x.split('/'), split))
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for i in range(len(splits)):
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for j in range(len(splits[i])):
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if splits[i][j] is not '':
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splits[i][j] = int(splits[i][j]) - 1
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self.add_face(Face().from_array(splits))
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class OBJExporter(Exporter):
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def __init__(self, model):
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super().__init__(model)
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def __str__(self):
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string = ""
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for vertex in self.model.vertices:
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string += "v " + ' '.join([str(vertex.x), str(vertex.y), str(vertex.z)]) + "\n"
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string += "\n"
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if len(self.model.tex_coords) > 0:
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for tex_coord in self.model.tex_coords:
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string += "vt " + ' '.join([str(tex_coord.x), str(tex_coord.y)]) + "\n"
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string += "\n"
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if len(self.model.normals) > 0:
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for normal in self.model.normals:
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string += "vn " + ' '.join([str(normal.x), str(normal.y), str(normal.z)]) + "\n"
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string += "\n"
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for face in self.model.faces:
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string += "f "
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arr = []
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for v in [face.a, face.b, face.c]:
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sub_arr = []
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sub_arr.append(str(v.vertex + 1))
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if v.normal is None:
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if v.texture is not None:
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sub_arr.append('')
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sub_arr.append(str(v.texture + 1))
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elif v.texture is not None:
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sub_arr.append(str(v.texture + 1))
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if v.normal is not None:
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sub_arr.append(str(v.normal + 1))
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arr.append('/'.join(sub_arr))
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string += ' '.join(arr) + '\n'
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return string
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