You use a view plane camera data structure to get or set information about a view plane camera. A view plane camera data structure is defined by the TQ3ViewPlaneCameraData data type.
typedef struct TQ3ViewPlaneCameraData {
TQ3CameraData cameraData;
float viewPlane;
float halfWidthAtViewPlane;
float halfHeightAtViewPlane;
float centerXOnViewPlane;
float centerYOnViewPlane;
} TQ3ViewPlaneCameraData;