Rebuild local Blender WASM environment and recovery evidence

tools/web/check-wbv2-p2-004-desktop.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+def report_scene():
+    scene = bpy.context.scene
+    cube = bpy.data.objects.get("WBV2P2004ViewportCube")
+    camera = bpy.data.objects.get("WBV2P2004ViewportCamera")
+    if cube is None or cube.type != "MESH" or camera is None or camera.type != "CAMERA":
+        raise RuntimeError("VIEWPORT_INVALID: viewport fixture is missing cube or camera")
+    return {
+        "sceneId": "scene:" + scene.name,
+        "cubeId": "object:" + cube.name,
+        "meshId": "mesh:" + cube.data.name,
+        "cameraId": "object:" + camera.name,
+        "cameraDataId": "camera:" + camera.data.name,
+        "cubeLocation": [round(float(value), 6) for value in cube.location],
+        "cameraLocation": [round(float(value), 6) for value in camera.location],
+        "cameraLensMm": round(float(camera.data.lens), 6),
+        "vertexCount": len(cube.data.vertices),
+        "faceCount": len(cube.data.polygons),
+    }
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-wbv2-p2-004-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_scene()
+    descriptor, temporary = tempfile.mkstemp(prefix="wbv2-p2-004-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_scene()
+    finally:
+        pathlib.Path(temporary).unlink(missing_ok=True)
+    if before != after:
+        raise RuntimeError(f"VIEWPORT_INVALID: desktop save/reopen drift: {before} != {after}")
+    value = {
+        "schemaVersion": 1,
+        "task": "WBV2-P2-004",
+        "operation": "VIEWPORT_MAIN_OFFSCREEN_DESKTOP",
+        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
+        "scene": 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-p2-004-desktop-ok cube=%s camera=%s pixels=browser saveReopen=exact" % (after["cubeId"], after["cameraId"]))
+
+
+if __name__ == "__main__":
+    main()