Class COO

cadquery/occ_impl/nurbs.py:101–135

COO sparse matrix container.

class COO(NamedTuple):
    """
    COO sparse matrix container.
    """

    i: ArrayI
    j: ArrayI
    v: Array
    shape: tuple[int, int]

    def coo(self):

        return sp.coo_matrix((self.v, (self.i, self.j)), shape=self.shape)

    def cooarr(self):

        return sp.coo_array((self.v, (self.i, self.j)), shape=self.shape)

    def csc(self):

        return self.coo().tocsc()

    def csr(self):

        return self.coo().tocsr()

    @classmethod
    def fromSP(cls, sparr: sp.sparray | sp.spmatrix):
        """
        Helper for converting from any SciPy sparse array or matrix.
        """

        tmp = sparr.tocoo()

        return cls(tmp.row, tmp.col, tmp.data, tmp.shape)


class Curve(NamedTuple):