Adobe After Effects CS3 Manual de usuario descargar pdf (Pagina 439)

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AFTER EFFECTS CS3

User Guide

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Source Center Specifies the center point of the shape, relative to the source layer. For example, if you isolate a shape

thatispositionedinthelefthalfoftheframe,theshaperadiatestotheleftbydefault;youcanmovethesourcecenter

anywhere on the layer.

Value Channel The color attributes of the source layer used to define the image contours.

Invert Input Inverts the chosen value channel option.

Value Threshold Specifies the threshold for the chosen value channel. It determines the percentage value at which

everythingbelowitoraboveitismappedtoeitherwhiteorblack.Thiscontrolcanmakeabigdifferenceintheshape

of the wave.

Pre-Blur Smooths out the value channel before the value threshold is sampled. If you have a high-contrast image,

such as white on black, and you want the wave to follow the edges very closely, set this option to 0.

Tolerance Defines how tightly the wave conforms to the layer. A very high setting results in sharp corners; a very

low value can make the wave shape more sensitive to noise.

Contour Specifies the shape in the source layer that you want to use as the emitted wave. Contour numbers the

shapes by their order in the frame from top to bottom, left to right. The shape in the top left corner is number 1.

Wave Motion controls

Wave Motion controls specify how the wave emits from the center point.

Frequency Specifies the number of waves per second flowing out of the producer point.

Expansion Specifiesthespeedatwhichthewavetravelsfromtheproducerpointonceitisborn.Thisoptiondoesn’t

affect the number of waves per second.

Orientation Specifies the rotation of the shape at birth around its center point. To animate the rotation, use the Spin

control.

Direction Specifies the wave’s initial direction if Velocity is greater than 0. By default, particles are emitted from the

producer point in an expanding radial pattern.

Velocity Specifies the speed at which the wave moves in the specified direction.

Spin Controls the continued rotation of a shape after it is born.

Lifespan (sec) Specifies the time, in seconds (including the fade-in and fade-out times), that the wave exists.

To prevent waves from abruptly disappearing when their lifetime ends, use the Fade Out Time control.

Reflection Specifies whether the waves bounce off the edges of the layer and back into the scene. This option is

effective for generating displacement maps for use as water ripples.

Stroke controls

Stroke controls specify the appearance of the wave’s stroke.

Profile Controlstheappearanceofthestrokethatdefinestheshape.Theoutlineoftheshapeisanimatedinthewave

that emanates from the effect point. The quality of the stroke is defined as a 3D wave type.

Color Specifies the color of the stroke.

Opacity Specifies the maximum possible opacity of the stroke. The actual opacity of the stroke takes into account

this setting in conjunction with the Fade-in Time and Fade-out Time controls.

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Adobe After Effects CS3 Manual de usuario Pagina 439

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