workshop rework

tools/smoke_blender.py

@@ -0,0 +1,69 @@
+"""Integration check: export/import, changed geometry/material, stable asset paths, MRQ."""
+import os
+from pathlib import Path
+import subprocess
+
+import unreal
+
+from ue_workshop import Scene, Sequence, blender, camera, lighting, render
+from ue_workshop.paths import PROJECT, executable
+
+source = PROJECT / "source_assets/character/character.blend"
+if not source.is_file():
+    raise RuntimeError("Wygeneruj przykladowa postac: blender --background --python tools/create_character.py")
+mesh = blender.import_character(source, name="SmokeCharacterV1")
+asset_path = mesh.get_path_name()
+old_bounds = mesh.get_bounds().box_extent.z
+old_materials = {str(item.material_slot_name): item.material_interface.get_path_name()
+                 for item in mesh.static_materials}
+assert len(old_materials) == 3, old_materials
+assert all(old_materials.values())
+
+# Change a COPY of the source, never the student's .blend.
+variant = PROJECT / "build/smoke/character_variant.blend"
+variant.parent.mkdir(parents=True, exist_ok=True)
+code = ("import bpy; bpy.data.objects['Head'].scale *= 2; "
+        "bpy.data.materials['Head_Orange'].node_tree.nodes.get('Principled BSDF')."
+        "inputs['Base Color'].default_value = (0.02, 0.8, 0.05, 1); "
+        "image = bpy.data.images.new('BodyPattern', width=2, height=2); "
+        "image.pixels = [0.1, 0.3, 0.8, 1] * 4; image.pack(); "
+        "tree = bpy.data.materials['Body_Blue'].node_tree; "
+        "node = tree.nodes.new('ShaderNodeTexImage'); node.image = image; "
+        "tree.links.new(node.outputs['Color'], tree.nodes.get('Principled BSDF').inputs['Base Color']); "
+        f"bpy.ops.wm.save_as_mainfile(filepath={str(variant)!r})")
+completed = subprocess.run([executable("blender"), "--background", str(source),
+                            "--python-exit-code", "1", "--python-expr", code],
+                           capture_output=True, text=True, timeout=120)
+if completed.returncode:
+    raise RuntimeError((completed.stdout + completed.stderr)[-4000:])
+updated = blender.import_character(variant, name="SmokeCharacterV1")
+assert updated.get_path_name() == asset_path, "Import created a different mesh asset"
+assert updated.get_bounds().box_extent.z > old_bounds + 5, "Geometry was not updated"
+new_materials = {str(item.material_slot_name): item.material_interface.get_path_name()
+                 for item in updated.static_materials}
+assert new_materials == old_materials, "Material identities changed"
+assert all(unreal.load_asset(path) for path in new_materials.values())
+green_found = False
+texture_found = False
+for path in new_materials.values():
+    material = unreal.load_asset(path)
+    for parameter in unreal.MaterialEditingLibrary.get_vector_parameter_names(material):
+        color = unreal.MaterialEditingLibrary.get_material_instance_vector_parameter_value(material, parameter)
+        if color.g > 0.7 and color.r < 0.1 and color.b < 0.1:
+            green_found = True
+    for parameter in unreal.MaterialEditingLibrary.get_texture_parameter_names(material):
+        texture = unreal.MaterialEditingLibrary.get_material_instance_texture_parameter_value(material, parameter)
+        if texture and texture.get_path_name().startswith("/Game/Workshop/Generated/Imports/SmokeCharacterV1/"):
+            texture_found = True
+assert green_found, "Updated green material was not imported"
+assert texture_found, "Embedded Blender texture was not imported and assigned"
+
+scene = Scene("BlenderSmoke")
+actor = scene.mesh(updated, name="UpdatedCharacter")
+lighting.studio(scene)
+cam = camera.create(scene)
+shot = Sequence(scene, frames=2)
+shot.camera(cam)
+shot.transform_key(actor, 0, rotation=(0, 0, 0))
+shot.transform_key(actor, 1, rotation=(0, 0, 30))
+render.start(shot)