TwirlThe Twirl effect twirls the pixels of an image around a specified point at a specified amount. Pixels nearer the center point are twirled faster than pixels in outer regions, resulting in a whirlpool effect. Because distortion in this effect is significant, a special anti-aliasing technique is used to produce the highest-quality image. As a result, the Twirl effect can be particularly slow to render. Angle Specifies how far and in which direction to twirl the image around the Twirl Center. Positive angles twirl the image clockwise; negative angles twirl it counterclockwise. To animate the twirl as a whirlpool, set keyframes for the angle. Twirl Radius Specifies how far the twirl extends from the twirl center. This value is based on a percentage of the maximum horizontal or vertical distance of the clip, whichever is greater. A value of 50, for example, produces a twirl that extends to the edge of the clip. |