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)
