Data Structures | |
struct | A3DCrvEllipseData |
Elliptic curve structure. More... | |
Functions | |
A3DStatus | A3DCrvEllipseCreate (const A3DCrvEllipseData *pData, A3DCrvEllipse **ppCrv) |
Creates an A3DCrvEllipse from A3DCrvEllipseData structure. More... | |
A3DStatus | A3DCrvEllipseGet (const A3DCrvEllipse *pCrv, A3DCrvEllipseData *pData) |
Populates the A3DCrvEllipseData structure. More... | |
Detailed Description
- Version
- 2.0
Entity type is kA3DTypeCrvEllipse.
The canonical form is defined with an 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].
A3DParameterizationData allows 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).
- Note
- The values of the
m_dXRadius
andm_dYRadius
members must be greater than 0.
Function Documentation
◆ A3DCrvEllipseGet()
A3DStatus A3DCrvEllipseGet | ( | const A3DCrvEllipse * | pCrv, |
A3DCrvEllipseData * | pData | ||
) |
Populates the A3DCrvEllipseData structure.
- Version
- 2.0
- Returns
- A3D_SUCCESS in case of success or an error code
- 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
◆ A3DCrvEllipseCreate()
A3DStatus A3DCrvEllipseCreate | ( | const A3DCrvEllipseData * | pData, |
A3DCrvEllipse ** | ppCrv | ||
) |
Creates an A3DCrvEllipse from A3DCrvEllipseData structure.
- Version
- 2.0
- Returns
- A3D_SUCCESS in case of success or an error code
- Return values
-
A3D_INVALID_DATA_STRUCT_SIZE A3D_INVALID_DATA_STRUCT_NULL A3D_INTERVAL_INCONSISTENT_DATA A3D_SUCCESS