Parabolic Curve

2.0

Entity type is:c:enumerator:~kA3DTypeCrvParabola.

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

The:c:struct:~A3DParameterizationDatastruct specified by the:c:member:A3DCrvParabolaData::m_sParam <A3DCrvParabolaData.m_sParam>member specifies reparameterization and trim for the curve.

In version 2.1 and earlier, values for parameterization named in the:c:member:A3DCrvParabolaData::m_cParamType <A3DCrvParabolaData.m_cParamType>member are inverted compared to the corresponding values in the*PRC Format Specification*.

2.3

When:c:member:A3DCrvParabolaData::m_cParamType <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 )**.

A3DParameterizationDataallows for reparameterization and trim.

Returns

A3D_SUCCESSon success, or an error code on failure

Structures

• A3DCrvParabolaData

Functions

• A3DCrvParabolaGet()
• A3DCrvParabolaCreate()