Adobe After Effects CS3 Uživatelský manuál Strana 409

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AFTER EFFECTS CS3
User Guide
404
Distort effects
Zaxwerks provides a set of 3D Warps effect plug-ins, which can be used to distort layers in 3D space:
www.adobe.com/go/learn_ae_zax3dwarps.
Bezier Warp effect
TheBezierWarpeffectshapesanimageusingaclosedBeziercurvealongtheboundaryofalayer.Thecurveconsists
of four segments. Each segment has three points (a vertex and two tangents).
This effect works with 8-bpc and 16-bpc color.
Original (top left) and with variations of Bezier Warp applied (bottom left and right)
Thepositionsoftheverticesandtangentsdeterminethesizeandshapeofacurvedsegment.Draggingthesepoints
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.
This effect works with 8-bpc and 16-bpc color.
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