def __init__(self, vertexCoords, faceVertexIDs, cellFaceIDs): """faceVertexIds and cellFacesIds must be padded with minus ones.""" self.vertexCoords = vertexCoords self.faceVertexIDs = MA.masked_values(faceVertexIDs, -1) self.cellFaceIDs = MA.masked_values(cellFaceIDs, -1) _CommonMesh.__init__(self)