Elliptic Curve

2.0

Entity type is:c:enumerator:~kA3DTypeCrvEllipse.

The canonical form is defined with an:c:struct:~A3DMiscCartesianTransformationData, its origin being the center of the ellipse and its vector X being the axis corresponding to zero parameter and X radius. The implicit parameterization is an angle in radian in the range [0, 2PI].

A3DParameterizationDataallows for reparameterization and trim.

Example of an elliptic arc

In this example, the ellipse is in the XY plane (and therefore has an identity transformation), with radii**Rx**and**Ry**and is restricted to the**[ t0 , t1 ]**interval. Assuming``m_dCoeffA``is 1.0 and``m_dCoeffB``0.0 (which indicates a parameterization in radians), then t0=0 and t1=PI/2, t0 corresponds to the Cartesian coordinates (Rx,0,0) and t1 to (0,Ry,0).

The values of the``m_dXRadius``and``m_dYRadius``members must be greater than 0.

Returns

A3D_SUCCESSon success, or an error code on failure

Structures

• A3DCrvEllipseData

Functions

• A3DCrvEllipseGet()
• A3DCrvEllipseCreate()