improved auto import, spiderman

Content/Python/auto_import_pipeline.py

@@ -6,9 +6,9 @@ dialog, and wires the textures into a Material Instance per mesh.
 """
 import os, unreal
 
-SRC_DIR = r"C:\Users\koleg\Documents\Unreal Projects\ExampleProject\DemoAssets\RobotPolice"
-DEST_PATH = "/Game/ImportedAssets"
-MASTER_MATERIAL = f"{DEST_PATH}/M_Master"
+DEMO_ROOT = r"C:\Users\koleg\Documents\Unreal Projects\ExampleProject\DemoAssets"
+DEST_ROOT = "/Game/ImportedAssets"
+MASTER_MATERIAL = f"{DEST_ROOT}/M_Master"
 
 # suffix -> (texture parameter name, material property, sampled channel)
 PARAMS = {
@@ -27,19 +27,19 @@ def get_or_create_master_material():
     if unreal.EditorAssetLibrary.does_asset_exist(MASTER_MATERIAL):
         return unreal.EditorAssetLibrary.load_asset(MASTER_MATERIAL)
 
-    material = asset_tools.create_asset("M_Master", DEST_PATH, unreal.Material, unreal.MaterialFactoryNew())
+    material = asset_tools.create_asset("M_Master", DEST_ROOT, unreal.Material, unreal.MaterialFactoryNew())
     for i, (suffix, (param, prop, channel)) in enumerate(PARAMS.items()):
-        tex = mel.new_material_expression(material, unreal.MaterialExpressionTextureSampleParameter2D, -400, i * 200)
+        tex = mel.create_material_expression(material, unreal.MaterialExpressionTextureSampleParameter2D, -400, i * 200)
         tex.set_editor_property("parameter_name", param)
         mel.connect_material_property(tex, channel, prop)
     mel.recompile_material(material)
     return material
 
 
-def import_task(filename, name, options=None):
+def import_task(filename, name, dest_path, options=None):
     task = unreal.AssetImportTask()
     task.filename = filename
-    task.destination_path = DEST_PATH
+    task.destination_path = dest_path
     task.destination_name = name
     task.automated = True
     task.save = True
@@ -47,10 +47,10 @@ def import_task(filename, name, options=None):
     if options:
         task.options = options
     asset_tools.import_asset_tasks([task])
-    return unreal.load_asset(f"{DEST_PATH}/{name}")
+    return unreal.load_asset(f"{dest_path}/{name}")
 
 
-def import_fbx(filename, name):
+def import_fbx(filename, name, dest_path):
     options = unreal.FbxImportUI()
     options.mesh_type_to_import = unreal.FBXImportType.FBXIT_SKELETAL_MESH
     options.import_mesh = True
@@ -59,14 +59,29 @@ def import_fbx(filename, name):
     options.create_physics_asset = False
     options.import_materials = False
     options.import_textures = False
-    return import_task(filename, name, options)
+    return import_task(filename, name, dest_path, options)
+
+
+def assign_material(skeletal_mesh, material):
+    slots = skeletal_mesh.get_editor_property("materials")
+    for slot in slots:
+        slot.set_editor_property("material_interface", material)
+    skeletal_mesh.set_editor_property("materials", slots)
+    unreal.EditorAssetLibrary.save_asset(skeletal_mesh.get_path_name())
 
 
 master = get_or_create_master_material()
 
-# group source files by base name: {"RobotPolice": {"fbx": "...", "_BC": "...", ...}}
-groups = {}
-for f in os.listdir(SRC_DIR):
+asset_count = 0
+for asset_folder in os.listdir(DEMO_ROOT):
+    src_dir = os.path.join(DEMO_ROOT, asset_folder)
+    if not os.path.isdir(src_dir):
+        continue
+    dest_path = f"{DEST_ROOT}/{asset_folder}"
+
+    # group source files by base name: {"RobotPolice": {"fbx": "...", "_BC": "...", ...}}
+    groups = {}
+    for f in os.listdir(src_dir):
         stem, ext = os.path.splitext(f)
         if ext.lower() == ".fbx":
             groups.setdefault(stem, {})["fbx"] = f
@@ -76,22 +91,24 @@ for f in os.listdir(SRC_DIR):
                 groups.setdefault(stem[: -len(suffix)], {})[suffix] = f
                 break
 
-for base_name, files in groups.items():
+    for base_name, files in groups.items():
         if "fbx" not in files:
             continue
 
-    import_fbx(os.path.join(SRC_DIR, files["fbx"]), base_name)
+        mesh = import_fbx(os.path.join(src_dir, files["fbx"]), base_name, dest_path)
 
-    mi = asset_tools.create_asset(f"MI_{base_name}", DEST_PATH, unreal.MaterialInstanceConstant,
+        mi = asset_tools.create_asset(f"MI_{base_name}", dest_path, unreal.MaterialInstanceConstant,
                                        unreal.MaterialInstanceConstantFactoryNew())
         mel.set_material_instance_parent(mi, master)
 
         for suffix, (param, _, _) in PARAMS.items():
             if suffix not in files:
                 continue
-        texture = import_task(os.path.join(SRC_DIR, files[suffix]), f"T_{base_name}{suffix}")
+            texture = import_task(os.path.join(src_dir, files[suffix]), f"T_{base_name}{suffix}", dest_path)
             mel.set_material_instance_texture_parameter_value(mi, param, texture)
 
         unreal.EditorAssetLibrary.save_asset(mi.get_path_name())
+        assign_material(mesh, mi)
+        asset_count += 1
 
-print(f"Imported {len(groups)} asset(s) into {DEST_PATH}")
+print(f"Imported {asset_count} asset(s) into {DEST_ROOT}")