ud18010andClaude Opus 4.8
c1a1a0e490
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
53 lines
2.2 KiB
Python
53 lines
2.2 KiB
Python
"""FBX 减面 CLI：减到指定三角面数并重展 UV（seam 展开 + UVPM4 排布），输出 <名>_low.fbx。
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用法：python model_decimate.py src/well1500.fbx --tris 5000 [-o dir]
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[--unwrap seam|smart] [--blender exe]"""
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import argparse
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import os
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from mt_run import find_blender, run_blender_script
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def main():
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ap = argparse.ArgumentParser(description=__doc__)
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ap.add_argument("input", help="FBX 文件")
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ap.add_argument("--tris", type=int, required=True, help="目标三角面数")
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ap.add_argument("-o", "--out", default=None, help="输出目录（默认源文件同目录）")
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ap.add_argument("--unwrap", choices=("seam", "smart"), default="seam",
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help="UV 展开：seam=锐边接缝整岛展开（默认），smart=Smart UV Project")
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ap.add_argument("--blender", default=None)
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args = ap.parse_args()
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if args.tris <= 0:
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ap.error("--tris 必须为正整数")
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blender = find_blender(args.blender)
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name = os.path.splitext(os.path.basename(args.input))[0]
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outdir = args.out or os.path.dirname(os.path.abspath(args.input))
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out_fbx = os.path.join(outdir, name + "_low.fbx")
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s = run_blender_script(blender, "bl_decimate.py",
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[args.input, out_fbx, str(args.tris), args.unwrap])
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print("== %s: %d -> %d 面（目标 %d）-> %s" %
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(s["src"], s["tris_before"], s["tris_after"], s["target"], out_fbx))
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u = s["uv"]
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overlap = "%.1f%%" % (u["overlap"] * 100) if u["overlap"] is not None else "n/a"
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print(" UV: 模式=%s 岛数=%d 利用率=%.1f%% 翻转=%.1f%% 重叠=%s" %
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(u["mode"], u["islands"], u["fill"] * 100, u["flipped"] * 100, overlap))
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if s.get("uv_polys"):
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try:
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import json as _json
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from uv_preview import render_uv_png
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with open(s["uv_polys"], encoding="utf-8") as fp:
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polys = _json.load(fp)
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render_uv_png(polys, s["uv_preview"])
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os.remove(s["uv_polys"])
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print(" UV 观察图: %s" % s["uv_preview"])
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except Exception as e:
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print(" [警告] UV 观察图渲染失败：%s" % e)
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for w in s["warnings"]:
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print(" [警告] %s" % w)
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if __name__ == "__main__":
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main()
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