Disks

A disk is a two-dimensional surface defined by an origin (that is, the center of the disk) and two vectors that define the major and minor radii of the disk. A disk is defined by the TQ3DiskData data type. See "Creating and Editing Disks" for a description of the routines you can use to create and edit disks. Figure 33 shows a disk.

Figure 33 A disk



 
typedef struct TQ3DiskData {

    TQ3Point3D                          origin;

    TQ3Vector3D                         majorRadius;

    TQ3Vector3D                         minorRadius;

    float                               uMin, uMax, vMin, vMax;

    TQ3AttributeSet                     diskAttributeSet;

} TQ3DiskData;

origin: The origin (that is, the center) of the disk.
majorRadius: The major radius of the disk.
minorRadius: The minor radius of the disk.
uMin: The minimum value in the u parametric direction of the disk. This value should be greater than or equal to 0.0 and less than or equal to 1.0.
uMax: The maximum value in the u parametric direction of the disk. This value should be greater than or equal to 0.0 and less than or equal to 1.0.
vMin: The minimum value in the v parametric direction of the disk. This value should be greater than or equal to 0.0 and less than or equal to 1.0.
vMax: The maximum value in the v parametric direction of the disk. This value should be greater than or equal to 0.0 and less than or equal to 1.0.
diskAttributeSet: A set of attributes for the disk. The value in this field is NULL if no disk attributes are defined.