workshop rework

tools/blender_export.py

@@ -0,0 +1,46 @@
+"""Executed by Blender, never by Unreal. Export an evaluated, joined static mesh."""
+import argparse
+from pathlib import Path
+import sys
+
+import bpy
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--output", required=True)
+    parser.add_argument("--collection", default="Character")
+    args = parser.parse_args(sys.argv[sys.argv.index("--") + 1:])
+    collection = bpy.data.collections.get(args.collection)
+    if collection is None:
+        raise RuntimeError(f"Brak kolekcji {args.collection!r} w zapisanym pliku blend.")
+    meshes = [obj for obj in collection.all_objects if obj.type == "MESH"]
+    if not meshes:
+        raise RuntimeError("Kolekcja Character nie zawiera siatek.")
+    bpy.ops.object.select_all(action="DESELECT")
+    depsgraph = bpy.context.evaluated_depsgraph_get()
+    copies = []
+    for obj in meshes:
+        evaluated = obj.evaluated_get(depsgraph)
+        data = bpy.data.meshes.new_from_object(evaluated, depsgraph=depsgraph)
+        duplicate = bpy.data.objects.new(obj.name + "_export", data)
+        bpy.context.scene.collection.objects.link(duplicate)
+        duplicate.matrix_world = obj.matrix_world.copy()
+        duplicate.select_set(True)
+        copies.append(duplicate)
+    bpy.context.view_layer.objects.active = copies[0]
+    bpy.ops.object.join()
+    joined = bpy.context.object
+    joined.name = "Character"
+    # Origin at world zero: stable pivot, independent of which body part is first.
+    bpy.context.scene.cursor.location = (0, 0, 0)
+    bpy.ops.object.origin_set(type="ORIGIN_CURSOR")
+    output = Path(args.output).resolve()
+    output.parent.mkdir(parents=True, exist_ok=True)
+    bpy.ops.export_scene.gltf(filepath=str(output), export_format="GLB", use_selection=True,
+                              export_animations=False, export_materials="EXPORT", export_yup=True)
+    print("WORKSHOP_EXPORTED=" + str(output))
+
+
+if __name__ == "__main__":
+    main()