3D Graphics Programming with QuickDraw 3D 1.5.4

Rotate-About-Point Transform Data Structure

You can use a rotate-about-point transform data structure to specify a rotate transform about an axis at an arbitrary point in space (for example, when calling the Q3RotateAboutPointTransform_NewData function). The rotate-about-point transform data structure is defined by the TQ3RotateAboutPointTransformData data type.



 
typedef struct TQ3RotateAboutPointTransformData {

    TQ3Axis                             axis;

    float                               radians;

    TQ3Point3D                          about;

} TQ3RotateAboutPointTransformData;

axis: The axis of rotation. You can use the constants kQ3AxisX , kQ3AxisY , and kQ3AxisZ to specify an axis.
radians: The number of radians to rotate around the axis of rotation.
about: The point at which the rotation is to occur.