Parabolic Curve

Detailed Description

group a3d_crvparabola

Entity type is kA3DTypeCrvParabola.

Version
2.0

For the canonical definition of this curve and its corresponding parametric equation, see the “SerializeParabola” section of the .

The A3DParameterizationData struct specified by the A3DCrvParabolaData::m_sParam member specifies reparameterization and trim for the curve.

When A3DCrvParabolaData::m_cParamType is set to 1, X value must be taken as param2/sqrt(16*focus2+param2), and Y as corresponding value 2 * A3DCrvParabolaData::m_dFocal * sqrt( fabs(X) / A3DCrvParabolaData::m_dFocal ).

Attention
In version 2.1 and earlier, values for parameterization named in the A3DCrvParabolaData::m_cParamType member are inverted compared to the corresponding values in the .
Version
2.3

A3DParameterizationData allows for reparameterization and trim.

Function Documentation

A3DStatus A3DCrvParabolaGet(const A3DCrvParabola *pCrv, A3DCrvParabolaData *pData)

Populates the A3DCrvParabolaData 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_CRV_CANNOT_ACCESS_CANONICAL –
  • A3D_SUCCESS –
Returns:

A3D_SUCCESS on success, or an error code on failure
A3DStatus A3DCrvParabolaCreate(const A3DCrvParabolaData *pData, A3DCrvParabola **ppCrv)

Creates an A3DCrvParabola from A3DCrvParabolaData structure.

Version
2.0

Return values:
  • A3D_INVALID_DATA_STRUCT_SIZE –
  • A3D_INVALID_DATA_STRUCT_NULL –
  • A3D_INTERVAL_INCONSISTENT_DATA –
  • A3D_SUCCESS –
Returns:

A3D_SUCCESS on success, or an error code on failure