Rebuild local Blender WASM environment and recovery evidence

tools/web/check-wbv2-p2-003-desktop.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+OPERATIONS = ("Translate", "Merge", "Dissolve", "Extrude", "Inset", "Bevel", "LoopCut")
+
+
+def mesh_report(label):
+    obj = bpy.data.objects.get("WBV2P2003%sObject" % label)
+    if obj is None or obj.type != "MESH":
+        raise RuntimeError("MESH_EDIT_INVALID: operation fixture object is missing")
+    mesh = obj.data
+    return {
+        "objectId": "object:" + obj.name,
+        "meshId": "mesh:" + mesh.name,
+        "vertexCount": len(mesh.vertices),
+        "edgeCount": len(mesh.edges),
+        "faceCount": len(mesh.polygons),
+        "triangleCount": sum(max(0, len(poly.vertices) - 2) for poly in mesh.polygons),
+        "positionHash": hashlib.sha256(json.dumps([tuple(round(float(value), 6) for value in vertex.co) for vertex in mesh.vertices], separators=(",", ":")).encode()).hexdigest(),
+    }
+
+
+def report():
+    return {label: mesh_report(label) for label in OPERATIONS}
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-wbv2-p2-003-desktop.py -- FIXTURE REPORT")
+    fixture, output = (pathlib.Path(value).resolve() for value in arguments)
+    bpy.ops.wm.open_mainfile(filepath=str(fixture), load_ui=True)
+    before = report()
+    descriptor, temporary = tempfile.mkstemp(prefix="wbv2-p2-003-reopen-", suffix=".blend", dir=fixture.parent)
+    os.close(descriptor)
+    try:
+        bpy.ops.wm.save_as_mainfile(filepath=temporary, check_existing=False, compress=True)
+        bpy.ops.wm.open_mainfile(filepath=temporary, load_ui=True)
+        after = report()
+    finally:
+        pathlib.Path(temporary).unlink(missing_ok=True)
+    if before != after:
+        raise RuntimeError(f"MESH_EDIT_INVALID: desktop save/reopen drift: {before} != {after}")
+    value = {
+        "schemaVersion": 1,
+        "task": "WBV2-P2-003",
+        "operation": "MESH_EDIT_CORE_DESKTOP",
+        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
+        "meshes": after,
+        "saveReopen": "EXACT",
+        "blenderVersion": bpy.app.version_string,
+    }
+    output.parent.mkdir(parents=True, exist_ok=True)
+    output.write_text(json.dumps(value, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+    print("wbv2-p2-003-desktop-ok meshes=%d topology=quad saveReopen=exact" % len(after))
+
+
+if __name__ == "__main__":
+    main()