# A3DCurveLength

A3DStatus `A3DCurveLength`(const A3DCrvBase *pCrv, const A3DIntervalData *pOptInterval, A3DDouble *pdLength)
  `A3DStatus` A3DCurveLength(const `A3DCrvBase`* pCrv, const `A3DIntervalData`* pOptInterval, `A3DDouble`* pdLength)

  Function to compute the length of a curve (optionally restricted to an interval)

  Parameters

  > pCrv: The curve:`A3DCrvBase`.

  > pOptInterval: The interval of restriction of the curve (if NULL, the natural interval of the curve will be used).

  > pdLength: The length of the curve.

  Returns

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

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