mirror of
https://github.com/AyuGram/AyuGramDesktop.git
synced 2026-08-06 11:52:58 +00:00
23rd
76 lines
2.8 KiB
Python
76 lines
2.8 KiB
Python
'''
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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'''
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# Converts a Wavefront .obj mesh into the compact .binobj format read at
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# runtime by Ui::Premium::LoadStarModel (ui/effects/premium_star_model.cpp).
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#
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# Usage: obj2binobj.py <input.obj> <output.binobj>
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#
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# Format (big-endian, 32-bit ints and floats):
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# int32 positionFloatCount; float32[positionFloatCount] # xyz triples
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# int32 uvFloatCount; float32[uvFloatCount] # uv pairs
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# int32 normalFloatCount; float32[normalFloatCount] # xyz triples
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# int32 cornerCount; { int32 posIdx, uvIdx, normIdx } x cornerCount
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# Indices are 0-based. UVs are stored raw; the loader flips V (1 - v).
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import struct
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import sys
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def main():
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if len(sys.argv) != 3:
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sys.stderr.write('Usage: obj2binobj.py <input.obj> <output.binobj>\n')
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return 1
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positions = []
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uvs = []
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normals = []
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corners = []
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with open(sys.argv[1], 'r') as source:
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for line in source:
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parts = line.split()
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if not parts or parts[0].startswith('#'):
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continue
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tag = parts[0]
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if tag == 'v':
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positions += [float(parts[1]), float(parts[2]), float(parts[3])]
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elif tag == 'vt':
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uvs += [float(parts[1]), float(parts[2])]
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elif tag == 'vn':
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normals += [float(parts[1]), float(parts[2]), float(parts[3])]
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elif tag == 'f':
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face = []
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for vertex in parts[1:]:
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fields = (vertex.split('/') + ['', ''])[:3]
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face.append([
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(int(fields[0]) - 1) if fields[0] else -1,
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(int(fields[1]) - 1) if fields[1] else -1,
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(int(fields[2]) - 1) if fields[2] else -1,
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])
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# Triangulate as a fan (a no-op for already-triangular faces).
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for i in range(1, len(face) - 1):
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corners += [face[0], face[i], face[i + 1]]
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with open(sys.argv[2], 'wb') as out:
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out.write(struct.pack('>i', len(positions)))
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out.write(struct.pack('>%df' % len(positions), *positions))
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out.write(struct.pack('>i', len(uvs)))
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out.write(struct.pack('>%df' % len(uvs), *uvs))
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out.write(struct.pack('>i', len(normals)))
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out.write(struct.pack('>%df' % len(normals), *normals))
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out.write(struct.pack('>i', len(corners)))
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for corner in corners:
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out.write(struct.pack('>3i', corner[0], corner[1], corner[2]))
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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