Parabolic Curve

2.0

Entity type is kA3DTypeCrvParabola.

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

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

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 *PRC Format Specification*.

2.3

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 * :c:member:`A3DCrvParabolaData::m_dFocal <A3DCrvParabolaData.m_dFocal>` * sqrt( fabs(X) / :c:member:`A3DCrvParabolaData::m_dFocal <A3DCrvParabolaData.m_dFocal>` ).

A3DParameterizationData allows for reparameterization and trim.

Returns

A3D_SUCCESS on success, or an error code on failure

Structures

• A3DCrvParabolaData

Functions

• A3DCrvParabolaGet()
• A3DCrvParabolaCreate()