59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
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#!/usr/bin/env python
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import obja
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import numpy as np
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import sys
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class Decimater(obja.Model):
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"""
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A simple class that decimates a 3D model stupidly.
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"""
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def __init__(self):
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super().__init__()
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self.deleted_faces = set()
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def contract(self, output):
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"""
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Decimates the model stupidly, and write the resulting obja in output.
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"""
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operations = []
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# Iterate through the vertex
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for (vertex_index, vertex) in enumerate(self.vertices):
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for (face_index, face) in enumerate(self.faces):
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# Delete any face that depends on this vertex
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if face_index not in self.deleted_faces:
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self.deleted_faces.add(face_index)
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operations.append(('face', face_index, face))
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# Delete the vertex
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operations.append(('vertex', vertex_index, vertex))
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# To rebuild the model, run operations in reverse order
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operations.reverse()
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output_model = obja.Output(output)
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for (ty, index, value) in operations:
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if ty == "vertex":
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output_model.add_vertex(index, value)
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else:
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output_model.add_face(index, value)
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def main():
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"""
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Runs the program on the model given as parameter.
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"""
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np.seterr(invalid = 'raise')
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model = Decimater()
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model.parse_file('exemple/suzanne.obj')
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with open('exemple/suzanne.obja', 'w') as output:
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model.contract(output)
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if __name__ == '__main__':
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main()
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