# Offset Curve

> 2.0

Entity type is `kA3DTypeCrvOffset`.

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

You can use an existing offset curve entity as the base curve used to create a new offset curve. That is, you can specify

> `A3DParameterizationData`must have `A3DParameterizationData::m_dCoeffA`set to 1, `A3DParameterizationData::m_dCoeffB`set to 0 and an `A3DIntervalData`identical to the one of `A3DCrvOffsetData::m_pBasisCrv`.

> `A3DMiscCartesianTransformationData`should correspond to identity transformation.

Returns

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

Structures

- `A3DCrvOffsetData`

Functions

- `A3DCrvOffsetGet()`
- `A3DCrvOffsetCreate()`

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