66 lines
2.0 KiB
Python
66 lines
2.0 KiB
Python
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from ..basemodel import TextModelParser, Exporter, Vertex, TexCoord, Normal, FaceVertex, Face
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from ..mesh import Material, MeshPart
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def is_off(filename):
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"""Checks that the file is a .off file
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Only checks the extension of the file
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:param filename: path to the file
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"""
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return filename[-4:] == '.off'
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class OFFParser(TextModelParser):
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"""Parser that parses a .off file
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"""
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def __init__(self, up_conversion = None):
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super().__init__(up_conversion)
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self.vertex_number = None
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self.face_number = None
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self.edge_number = None
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def parse_line(self, string):
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"""Parses a line of .off file
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:param string: the line to parse
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"""
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split = string.split()
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if string == '' or string == 'OFF':
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pass
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elif self.vertex_number is None:
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# The first will be the header
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self.vertex_number = int(split[0])
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self.face_number = int(split[1])
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self.edge_number = int(split[2])
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elif len(self.vertices) < self.vertex_number:
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self.add_vertex(Vertex().from_array(split))
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else:
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self.add_face(Face(FaceVertex(int(split[1])), FaceVertex(int(split[2])), FaceVertex(int(split[3]))))
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class OFFExporter(Exporter):
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"""Exporter to .off format
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"""
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def __init__(self, model):
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"""Creates an exporter from the model
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:param model: Model to export
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"""
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super().__init__(model)
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def __str__(self):
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"""Exports the model
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"""
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faces = sum(map(lambda x: x.faces, self.model.parts), [])
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string = "OFF\n{} {} {}".format(len(self.model.vertices), len(faces), 0) + '\n'
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for vertex in self.model.vertices:
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string += ' '.join([str(vertex.x), str(vertex.y), str(vertex.z)]) + '\n'
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for face in faces:
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string += '3 ' + ' '.join([str(face.a.vertex), str(face.b.vertex), str(face.c.vertex)]) + '\n'
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return string
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