Rolls up the foreground clip to reveal the background clip. The size and direction of the roll-up can be controlled.
            
            Requires a Background (Any) and a Foreground (Any).
            
            Produces an Output (Any).
            
             
               Rollup
               
 
               
                  
                     
                        
                        
                     
                     
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                            | Sets the size of the roll as a normalized proportion of the image. Set a floating-point value between 0 and 1 using the treadmill. | 
                     
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                            | Sets the proportion of each clip to be displayed. Set a floating-point value between 0 and 1 using the slider; 0 is all of
                              the foreground clip, 1 is all of the background clip. The normal animation would be from 0 at the first frame to 1 at the
                              last frame.
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                            | Sets the direction of the roll-up. Set any floating-point value in degrees using the treadmill; 0 degrees is 3 o'clock, positive
                              values move counter-clockwise.
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