/*

     File: PerspectiveMotionEffect.h

 Abstract: Subclass of UIMotionEffect that simulates a camera which orbits

 around a specific point of interest as the reported viewer offset changes.

  Version: 1.0

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#import <UIKit/UIKit.h>

@interface PerspectiveMotionEffect : UIMotionEffect

//! Position of the camera along the Z-axis.  Positive values extend twoards

//! the screen.  The point of interest for the virtual camera is fixed

//! at (center.x, center.y, 0) where center is the center point of the

//! view plane.

@property (nonatomic, readwrite) CGFloat cameraPositionZ;

//! Limits how much the camera can orbit around the X-axis.  (Recall that

//! the X-axis is parallel to the screen and extends horizontally).

//! You can therefore think of this value as how far the camera can move

//! up or down while still keeping its point of interest centered in its

//! view.

@property (nonatomic, readwrite) CGFloat maximumViewingAngleX;

//! Limits how much the camera can orbit around the Y-axis.  (Recall that

//! the Y-axis is parallel to the screen and extends vertically).

//! You can therefore think of this value as how far the camera can move

//! to the left or right while still keeping its point of interest centered

//! in its view.

@property (nonatomic, readwrite) CGFloat maximumViewingAngleY;

@end