110 lines
4.4 KiB
Python
110 lines
4.4 KiB
Python
"""ModelTranslator CLI：FBX -> 纯模型 FBX + XPbr 贴图 + Unity .mat/.meta。
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用法：python model_translator.py src/tong.fbx [-o out] [--max-size 2048] [--blender exe]"""
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import argparse
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import json
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import os
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import shutil
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import subprocess
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import sys
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import unity_assets as ua
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DEFAULT_BLENDER = r"D:\tools\blender-5.0.0-windows-x64\blender.exe"
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HERE = os.path.dirname(os.path.abspath(__file__))
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def find_blender(cli_arg):
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for cand in (cli_arg, os.environ.get("BLENDER_EXE"), DEFAULT_BLENDER,
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shutil.which("blender")):
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if cand and os.path.isfile(cand):
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return cand
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sys.exit("找不到 blender.exe，请用 --blender 指定或设置环境变量 BLENDER_EXE")
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def run_blender(blender, src, outdir, max_size):
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cmd = [blender, "-b", "--factory-startup",
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"--python", os.path.join(HERE, "bl_convert.py"),
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"--", src, outdir, str(max_size)]
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proc = subprocess.run(cmd, capture_output=True, text=True, encoding="utf-8",
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errors="replace")
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summary = None
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for line in (proc.stdout or "").splitlines():
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if line.startswith("MT_SUMMARY "):
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summary = json.loads(line[len("MT_SUMMARY "):])
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if proc.returncode != 0 or summary is None:
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sys.stderr.write(proc.stdout[-2000:] + "\n" + proc.stderr[-2000:] + "\n")
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sys.exit("Blender 转换失败：%s" % src)
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return summary
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def write_unity_assets(outdir, summary, max_size):
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remaps = []
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for m in summary["materials"]:
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base_png = os.path.join(outdir, m["base_png"])
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mix_png = os.path.join(outdir, m["mix_png"])
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base_guid = ua.guid_for(base_png)
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mix_guid = ua.guid_for(mix_png)
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alpha_test = m["alpha_mode"] == "transparency"
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with open(base_png + ".meta", "w", encoding="utf-8", newline="\n") as f:
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f.write(ua.texture_meta(base_guid, srgb=True, max_size=max_size,
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alpha_is_transparency=alpha_test))
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with open(mix_png + ".meta", "w", encoding="utf-8", newline="\n") as f:
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f.write(ua.texture_meta(mix_guid, srgb=False, max_size=max_size))
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# 与 bl_convert 的贴图命名一致：材质名等于模型名时不重复拼接
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mat_name = summary["model"] if m["safe_name"] == summary["model"] \
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else "%s_%s" % (summary["model"], m["safe_name"])
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mat_path = os.path.join(outdir, mat_name + ".mat")
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mat_guid = ua.guid_for(mat_path)
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with open(mat_path, "w", encoding="utf-8", newline="\n") as f:
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f.write(ua.material_yaml(mat_name, ua.XPBR_SHADER_GUID,
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base_guid, mix_guid, alpha_test))
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with open(mat_path + ".meta", "w", encoding="utf-8", newline="\n") as f:
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f.write(ua.material_meta(mat_guid))
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remaps.append((m["name"], mat_guid))
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fbx_path = os.path.join(outdir, summary["fbx"])
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fbx_guid = ua.guid_for(fbx_path) # 必须在 open("w") 截断文件之前读取，否则复用失效
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with open(fbx_path + ".meta", "w", encoding="utf-8", newline="\n") as f:
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f.write(ua.model_meta(fbx_guid, remaps))
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def report(summary, outdir):
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print("== %s -> %s" % (summary["model"], outdir))
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for m in summary["materials"]:
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print(" 材质 %-24s A通道=%s 尺寸=%dx%d" %
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(m["name"], m["alpha_mode"], m["size"][0], m["size"][1]))
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for k, v in m["sources"].items():
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print(" %-10s %s" % (k, v or "(常量)"))
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for w in m["warnings"]:
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print(" [警告] %s" % w)
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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 文件或目录")
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ap.add_argument("-o", "--out", default=os.path.join(HERE, "out"))
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ap.add_argument("--max-size", type=int, default=2048)
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ap.add_argument("--blender", default=None)
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args = ap.parse_args()
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blender = find_blender(args.blender)
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if os.path.isdir(args.input):
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srcs = [os.path.join(args.input, f) for f in sorted(os.listdir(args.input))
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if f.lower().endswith(".fbx")]
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if not srcs:
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sys.exit("目录中没有 FBX：%s" % args.input)
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else:
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srcs = [args.input]
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for src in srcs:
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name = os.path.splitext(os.path.basename(src))[0]
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outdir = os.path.join(args.out, name)
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summary = run_blender(blender, src, outdir, args.max_size)
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write_unity_assets(outdir, summary, args.max_size)
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report(summary, outdir)
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if __name__ == "__main__":
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main()
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