Offset Curve

Detailed Description

group a3d_crvoffset

Entity type is kA3DTypeCrvOffset.

Version
2.0

For the canonical definition of this curve, see the “SerializeOffset” section of the .

You can use an existing offset curve entity as the base curve used to create a new offset curve. That is, you can specify ../_images/A3DPRCGeometryCrvOffset.jpg

Note

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.

Note

A3DMiscCartesianTransformationData should correspond to identity transformation.

Function Documentation

A3DStatus A3DCrvOffsetGet(const A3DCrvOffset *pCrv, A3DCrvOffsetData *pData)

Populates the A3DCrvOffsetData structure.

Version
2.0

Return values:
  • A3D_INITIALIZE_NOT_CALLED –
  • A3D_INVALID_DATA_STRUCT_SIZE –
  • A3D_INVALID_DATA_STRUCT_NULL –
  • A3D_INVALID_ENTITY_NULL –
  • A3D_INVALID_ENTITY_TYPE –
  • A3D_SUCCESS –
Returns:

A3D_SUCCESS on success, or an error code on failure
A3DStatus A3DCrvOffsetCreate(const A3DCrvOffsetData *pData, A3DCrvOffset **ppCrv)

Creates an A3DCrvOffset from A3DCrvOffsetData structure.

Version
2.0

Warning

Associated transformation must be Identity

Warning

Trimming interval must be defined inside curve definition

Warning

Parameterization must have CoeffA = 1. and CoeffB = 0.

Return values:
  • A3D_INVALID_DATA_STRUCT_SIZE –
  • A3D_INVALID_DATA_STRUCT_NULL –
  • A3D_CRV_OFFSET_CANNOT_CREATE_CANONICAL –
  • A3D_SUCCESS –
Returns:

A3D_SUCCESS on success, or an error code on failure