Adobe 25520388 User Guide - Page 375

USING ADOBE PREMIERE PRO 370 Effects and transitions Twirl effect The Twirl effect distorts an image by rotating a clip around its center. The image is distorted more sharply in its center than at the edges, causing a whirlpool result at extreme settings. Angle How far to twirl the image. Positive angles twirl the image clockwise; negative angles twirl it counterclockwise. For a whirlpool result, animate the angle. Twirl Radius How far the twirl extends from the twirl center. This value is a percentage of width or height of the clip, whichever is greater. A value of 50, for example, produces a twirl that extends to the edges of the clip. Twirl Center Sets the position of the center of the twirl. Wave Warp effect The Wave Warp effect produces the appearance of a wave traveling across an image. You can produce a variety of different wave shapes, including square, circular, and sine waves. The Wave Warp effect is automatically animated at a constant speed across the time range (without keyframes). To vary speeds, you need to set keyframes. Wave Type The shape of the wave. Wave Height The distance, in pixels, between wave peaks. Wave Width The size of the wave in pixels. Direction The direction the wave travels across the image. For example, a value of 225° makes the waves travel diagonally from upper right to lower left. Wave Speed The speed (in cycles per second) at which the waves travel. A negative value reverses the wave direction, and a value of 0 produces no movement. To vary wave speed over time, set this control to 0, and then set keyframes for the Phase property. Pinning Which edges to pin so that the pixels along those edges aren't displaced. Phase The point along the waveform at which a wave cycle begins. For example, 0° starts the wave at the midpoint of its downward slope, and 90° starts it at the lowest point in the trough. Antialiasing (Best Quality) Sets the amount of anti-aliasing, or edge smoothing, to perform on the image. In many cases, lower settings produce satisfactory results; a high setting can significantly increase rendering time. An example of the Wave Warp effect can be found in this video. Generate effects 4-Color Gradient effect The 4-Color Gradient effect produces a four-color gradient. You define the gradient by four effect points, the positions, and colors of which can be animated using the Positions & Colors controls. The gradient is composed of four solidcolor circles blended together, each with an effect point as its center. Blend Higher values create more gradual transitions between colors. Jitter The amount of jitter (noise) in the gradient. The jitter, which reduces banding, affects only those areas where banding could occur. Opacity The opacity of the gradient, as a fraction of the clip's Opacity value. Blending Mode The blend mode to use in combining the gradient with the clip. Last updated 1/16/2012