Function loft

cadquery/occ_impl/nurbs.py:2064–2108

Regular (non-periodic) loft form curves.

(
    *curves: Curve,
    order: int = 3,
    lam: float = 1e-9,
    penalty: int = 4,
    tangents: Optional[List[Tuple[Array, Array]]] = None,
)

def loft(
    *curves: Curve,
    order: int = 3,
    lam: float = 1e-9,
    penalty: int = 4,
    tangents: Optional[List[Tuple[Array, Array]]] = None,
) -> Surface:
    """
    Regular (non-periodic) loft form curves.
    """

    nknots: int = len(curves)

    # collect control pts
    pts = np.stack([c.pts for c in curves])

    # approximate
    pts_new = []

    for j in range(pts.shape[1]):
        pts_new.append(
            approximate(
                pts[:, j, :],
                knots=nknots,
                order=order,
                lam=lam,
                penalty=penalty,
                tangents=tangents[j] if tangents else None,
            ).pts
        )

    # construct the final surface
    rv = Surface(
        np.stack(pts_new).swapaxes(0, 1),
        np.concatenate(
            (np.repeat(0, order), linspace(0, 1, nknots), np.repeat(1, order))
        ),
        curves[0].knots,
        order,
        curves[0].order,
        False,
        curves[0].periodic,
    )

    return rv