ModelTranslator: add QR bridge pure logic

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-22 16:40:36 +08:00
parent 025ce77397
commit 55654e8d33
2 changed files with 151 additions and 0 deletions
@@ -0,0 +1,63 @@
+"""QR 桥纯逻辑：引擎发现、面数换算、settings 生成、progress 解析。不 import bpy。
+减面可选后端 Quad Remesher 用——headless 直接调 Engine/xremesh.exe，绕开 modal 操作符。"""
+import glob
+import os
+
+QR_TIMEOUT = 120.0   # 引擎轮询超时（秒）
+
+
+def find_qr_engine():
+    """定位 QuadRemesher 的 xremesh.exe；找不到返回 None。
+    顺序：QR_ENGINE 环境变量 -> 标准 addon 路径（取最高 Blender 版本目录）。"""
+    env = os.environ.get("QR_ENGINE")
+    if env and os.path.isfile(env):
+        return env
+    appdata = os.environ.get("APPDATA")
+    if not appdata:
+        return None
+    pattern = os.path.join(
+        appdata, "Blender Foundation", "Blender", "*",
+        "scripts", "addons", "QuadRemesher", "Engine", "xremesh.exe")
+    hits = sorted(glob.glob(pattern))
+    return hits[-1] if hits else None
+
+
+def tris_to_target_quads(tris):
+    """三角面数换算 QR 目标四边形数：1 quad ≈ 2 tris，至少 1。"""
+    return max(1, int(tris) // 2)
+
+
+def build_settings(in_fbx, out_fbx, prog, target_quads,
+                   adaptive=50, exact=False, hard_edges=True):
+    """生成 RetopoSettings.txt 文本（xremesh.exe -s 读取）。"""
+    lines = [
+        "HostApp=Blender",
+        'FileIn="%s"' % in_fbx,
+        'FileOut="%s"' % out_fbx,
+        'ProgressFile="%s"' % prog,
+        "TargetQuadCount=%d" % target_quads,
+        "CurvatureAdaptivness=%d" % adaptive,
+        "ExactQuadCount=%d" % (1 if exact else 0),
+        "UseVertexColorMap=False",
+        "UseMaterialIds=0",
+        "UseIndexedNormals=0",
+        "AutoDetectHardEdges=%d" % (1 if hard_edges else 0),
+    ]
+    return "\n".join(lines) + "\n"
+
+
+def parse_progress(text):
+    """解析 progress.txt -> (state, msg)。
+    首行 '2'=success；<0=error（次行为文本）；空/分数/非法=running。"""
+    lines = text.splitlines()
+    if not lines:
+        return ("running", "")
+    try:
+        v = float(lines[0])
+    except ValueError:
+        return ("running", "")
+    if v == 2:
+        return ("success", "")
+    if v < 0:
+        return ("error", lines[1] if len(lines) > 1 else "")
+    return ("running", "")