# A3DSurfIsG1Continuous

A3DStatus `A3DSurfIsG1Continuous`(const A3DSurfBase *pSurf, const A3DVector2dData *pUVParameter, A3DDouble dAngleTolerance, A3DBool *pbUG1Continuous, A3DBool *pbVG1Continuous)
  `A3DStatus` A3DSurfIsG1Continuous(const `A3DSurfBase`* pSurf, const `A3DVector2dData`* pUVParameter, `A3DDouble` dAngleTolerance, `A3DBool`* pbUG1Continuous, `A3DBool`* pbVG1Continuous)

  Function to determine if a surface is G1 discontinuous at a point.

  Parameters

  > pSurf: The input surface.

  > pUVParameter: The coordinates of the point.

  > dAngleTolerance: The derivative angle tolerance.

  > pbUG1Continuous: The returned value for u direction.

  > pbVG1Continuous: The returned value for v direction.

  Returns

  > `A3D_SUCCESS`on success, or an error code on failure

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