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.

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© 1997 Apple Computer, Inc.

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