Adobe After Effects CS4 Manual de usuario descargar pdf (Pagina 477)

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USING AFTER EFFECTS CS4

Effects and animation presets

Last updated 12/21/2009

The positions of the vertices and tangents determine the size and shape of a curved segment. Dragging these points

reshapes the curves that form the edge, thus distorting the image. For example, you can use Bezier Warp to reshape

one image to fit another, as in wrapping a label around a jar. Bezier Warp is also useful for correcting lens aberrations,

such as the fisheye effect (barrel distortion) that can occur with a wide-angle lens; using Bezier Warp, you can bend

the image back to achieve an undistorted look. By animating the effect and choosing a high quality setting, you can

create fluid visual effects, such as a jiggling gelatin dessert or a fluttering flag.

Bulge effect

The Bulge effect distorts an image around a specified point, making the image appear to bulge toward or away from

the viewer, depending on the options you select.

Eran Stern explains how to use the Bulge effect in a video tutorial on the Motionworks website.

This effect works with 8-bpc and 16-bpc color.

Original (upper-left), and with variations of Bulge applied (lower-left and right)

Horizontal Radius and Vertical Radius The width and height of the distorted area, in pixels. You can also set the radius

values by dragging the selection handles in the layer.

Bulge Height The apparent depth of the bulge. Positive values push the bulge toward the viewer. Negative values pull

the bulge away from the viewer.

Taper Radius The shallowness of the sides of the bulge. A taper radius of 0 produces a steep, pronounced bulge.

Antialiasing The amount of edge smoothing (blending of colors) at the boundaries of the bulge. Anti-aliasing is

applied only when the layer quality is set to Best.

Pin All Edges Prevents the edges of the layer from bulging.

Corner Pin effect

The Corner Pin effect distorts an image by repositioning each of its four corners. Use it to stretch, shrink, skew, or twist

an image or to simulate perspective or movement that pivots from the edge of a layer, such as a door opening. You can

also use it to attach a layer to a moving rectangular region tracked by the motion tracker. You can move the corner

pins in the Composition panel, the Timeline panel, or the Effect Controls panel.

This effect works with 8-bpc, 16-bpc, and 32-bpc color.

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