48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
import struct, sys
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VTX_TAGS = {0x80: 12, 0x81: 24, 0x82: 28, 0x88: 20, 0x89: 32, 0x8A: 36}
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CONTAINERS = {0x03, 0x40, 0x41, 0x42, 0x46, 0x48, 0x70} # HEADER OBJECT LOD PATCH PMESH SPHERE_LIST BOUND
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def bounds(path):
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data = open(path, 'rb').read()
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assert data[:8] == b'DIV-BIZ2', path
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lo = [1e9, 1e9, 1e9]
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hi = [-1e9, -1e9, -1e9]
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nverts = 0
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def walk(pos, end):
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nonlocal nverts
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while pos < end - 2:
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tagword, = struct.unpack_from('<H', data, pos)
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tag = tagword & 0x2fff
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wide = (tagword >> 14) & 3
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if wide == 1:
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ln, = struct.unpack_from('<H', data, pos + 2)
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hdr = 4
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else:
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ln = data[pos + 2]
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hdr = 3
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payload = pos + hdr
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if tag in VTX_TAGS:
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stride = VTX_TAGS[tag]
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n = ln // stride
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for i in range(n):
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x, y, z = struct.unpack_from('<3f', data, payload + i * stride)
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for a, v in enumerate((x, y, z)):
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if v < lo[a]: lo[a] = v
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if v > hi[a]: hi[a] = v
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nverts += n
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elif tag in CONTAINERS:
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walk(payload, payload + ln)
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pos = payload + ln
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walk(8, len(data))
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print('%-14s verts=%5d X[%7.2f %7.2f] Y[%7.2f %7.2f] Z[%7.2f %7.2f]'
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% (path.split('\\')[-1], nverts, lo[0], hi[0], lo[1], hi[1], lo[2], hi[2]))
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base = r'C:\git\bt411\content\VIDEO\GEO\%s'
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for f in ['ERMLASER.BGF', 'PPC.BGF', 'LLASER.BGF', 'SLASER.BGF', 'MLASER.BGF']:
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try:
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bounds(base % f)
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except Exception as e:
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print(f, 'ERR', e)
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