Function transform_mesh

api/routers/optimize.py:204–228

(body: TransformRequest)

@router.post("/transform")
def transform_mesh(body: TransformRequest):
    # Bake an interactive-gizmo transform into the GLB at scene level so it
    # persists to export. Pure trimesh — no pymeshlab needed.
    input_path = _resolve_input_path(body.path)

    matrix = np.asarray(body.matrix, dtype=float)
    if matrix.shape != (4, 4):
        raise HTTPException(400, "matrix must be a 4x4 array")
    if not np.all(np.isfinite(matrix)):
        raise HTTPException(400, "matrix contains non-finite values")

    # Keep the loaded result as-is (Scene when textured/multi-geometry) so
    # apply_transform preserves materials and UVs.
    loaded = trimesh.load(str(input_path))
    loaded.apply_transform(matrix)

    stem = input_path.stem
    output_name = f"{stem}_xf_{uuid.uuid4().hex[:8]}.glb"
    output_dir = input_path.parent if str(input_path).startswith(str(WORKSPACE_DIR.resolve())) else WORKSPACE_DIR / "Workflows"
    output_dir.mkdir(parents=True, exist_ok=True)
    output_path = output_dir / output_name
    loaded.export(str(output_path))

    rel = output_path.relative_to(WORKSPACE_DIR).as_posix()
    return {"url": f"/workspace/{rel}"}


def _smooth(input_path: str, iterations: int, tmp_dir: str) -> trimesh.Trimesh: