| """Blender script: load a mesh, replace its base colour with a baked texture, export GLB. |
| |
| blender -b -P tools/apply_texture.py -- --mesh in.glb --texture texture.png --out out.glb |
| """ |
|
|
| import argparse |
| import os |
| import sys |
|
|
| import bpy |
|
|
|
|
| def parse(): |
| argv = sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else [] |
| ap = argparse.ArgumentParser() |
| ap.add_argument("--mesh", required=True) |
| ap.add_argument("--texture", required=True) |
| ap.add_argument("--out", required=True) |
| return ap.parse_args(argv) |
|
|
|
|
| def main(): |
| args = parse() |
| bpy.ops.wm.read_factory_settings(use_empty=True) |
| ext = os.path.splitext(args.mesh)[1].lower() |
| if ext in (".glb", ".gltf"): |
| bpy.ops.import_scene.gltf(filepath=args.mesh) |
| elif ext == ".obj": |
| bpy.ops.wm.obj_import(filepath=args.mesh) |
| elif ext == ".fbx": |
| bpy.ops.import_scene.fbx(filepath=args.mesh) |
| else: |
| raise SystemExit(f"unsupported {ext}") |
| image = bpy.data.images.load(os.path.abspath(args.texture)) |
| image.pack() |
| mat = bpy.data.materials.new("ultratex_albedo") |
| mat.use_nodes = True |
| nodes, links = mat.node_tree.nodes, mat.node_tree.links |
| bsdf = nodes.get("Principled BSDF") |
| tex = nodes.new("ShaderNodeTexImage") |
| tex.image = image |
| links.new(tex.outputs["Color"], bsdf.inputs["Base Color"]) |
| bsdf.inputs["Roughness"].default_value = 0.7 |
| for o in bpy.context.scene.objects: |
| if o.type == "MESH": |
| o.data.materials.clear() |
| o.data.materials.append(mat) |
| os.makedirs(os.path.dirname(os.path.abspath(args.out)), exist_ok=True) |
| bpy.ops.export_scene.gltf(filepath=os.path.abspath(args.out), export_format="GLB", export_image_format="AUTO") |
| print("APPLY_OK", args.out) |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
