# Curve On Surface

> 2.0

Entity type is `kA3DTypeCrvOnSurf`.

For the canonical definition of this curve, see the “SerializeTransformationCurve” section of the*PRC Format Specification*.

> `A3DParameterizationData`must have `A3DParameterizationData::m_dCoeffA`set to 1, `A3DParameterizationData::m_dCoeffB`set to 0 and an `A3DIntervalData`identical to the one of `A3DCrvOnSurfData::m_pUVCurve`.

> `A3DMiscCartesianTransformationData`should correspond to identity transformation.

> `A3DCrvOnSurfData::m_pUVCurve`must be a curve of type `kA3DTypeCrvLine`or `kA3DTypeCrvNurbs`.

Returns

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

Structures

- `A3DCrvOnSurfData`

Functions

- `A3DCrvOnSurfGet()`
- `A3DCrvOnSurfCreate()`

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