Add Chromium-only Blender WebEngine parity work

tools/web/blender-check-nonmesh-glb-roundtrip.py

@@ -0,0 +1,62 @@
+import json
+import os
+import sys
+
+import bpy
+
+
+EXPECTED_OBJECTS = {
+    "WebCurveObject",
+    "WebSurfaceObject",
+    "WebFontObject",
+    "WebMetaballObject",
+    "WebPointCloudObject",
+    "WebCurvesObject",
+    "WebHairObject",
+}
+
+
+def rounded(values):
+    return [round(float(value), 7) for value in values]
+
+
+def main(glb_path, output_path):
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    result = bpy.ops.import_scene.gltf(filepath=os.path.abspath(glb_path))
+    if "FINISHED" not in result:
+        raise RuntimeError(f"Blender glTF importer failed: {result}")
+
+    report = {}
+    for name in sorted(EXPECTED_OBJECTS):
+        obj = bpy.data.objects.get(name)
+        if obj is None:
+            raise RuntimeError(f"{name} was not imported")
+        if obj.type != "MESH":
+            raise RuntimeError(f"{name} was not imported as a mesh")
+        mesh = obj.data
+        mesh.calc_loop_triangles()
+        report[name] = {
+            "vertexCount": len(mesh.vertices),
+            "edgeCount": len(mesh.edges),
+            "triangleCount": len(mesh.loop_triangles),
+            "boundsMin": rounded([
+                min((vertex.co[axis] for vertex in mesh.vertices), default=0.0)
+                for axis in range(3)
+            ]),
+            "boundsMax": rounded([
+                max((vertex.co[axis] for vertex in mesh.vertices), default=0.0)
+                for axis in range(3)
+            ]),
+        }
+
+    with open(output_path, "w", encoding="ascii") as output:
+        json.dump(report, output, indent=2, sort_keys=True)
+        output.write("\n")
+    print(f"blender-nonmesh-glb-import-ok objects={len(report)}")
+
+
+if __name__ == "__main__":
+    arguments = sys.argv[sys.argv.index("--") + 1:]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python blender-check-nonmesh-glb-roundtrip.py -- input.glb output.json")
+    main(arguments[0], arguments[1])