Adobe After Effects CS3 Instrukcja Użytkownika Pobierz pdf (Strona 521)

AFTER EFFECTS CS3

User Guide

516

Damping Specifies how quickly a wave’s energy is absorbed by the liquid it travels through. The higher the value, the

quicker the wave energy is absorbed, and the shorter the distance the wave travels.

Wave Speed, Damping Specify the apparent viscosity of the liquid, and the apparent size of the body of liquid. For

example, waves in water move faster and farther than waves in honey; waves in a sink move much faster and fade out

much more quickly than waves in a lake.

Note: Wave World is optimized for small- to medium-sized bodies of water—anything from a teacup to a small lake.

Largebodiesofwater,likeanocean,includeswellsorwide,stablewaveswithnoapparentslowdown.Evenatthelowest

settings, Wave World cannot generate swells because the waves fade out relatively quickly.

Reflect Edges Specifies how waves bounce off the edges of the layer and back into the scene.

Pre-roll (seconds) Specifies when the waves start moving. By default, the effect starts with a still surface without

waves or ripples. Use this control to start the waves moving before the layer begins. The settings at the first frame of

the effect are applied to the layer during the pre-roll.

Ground controls

The Ground controls specify the appearance of the ground layer.

Ground Specifies the layer that appears at the bottom of the water. If you use an animated layer for the ground, Wave

World samples only the first frame. Wave World determines the intersection of the water’s surface with the edge of

the ground, computes the waves bouncing off the shore, and properly adjusts the speed of the waves depending on

the depth. The ground surface is determined by the layer’s brightness: White represents higher elevation, and black

represents lower elevation.

Steepness Adjusts the steepness of the ground by expanding and contracting the height of the displaced wireframe.

Themeshislockedattheblacklevel,soitalwaysgrowsupfromthebottom.Inotherwords,youcannotadjustthe

bottom of a canyon to be deeper; instead, you can adjust the rim to be higher. To make the canyon deeper, combine

a higher Steepness setting with a lower Height setting.

Height Controlsthedistancebetweenthewatersurfaceandtheground’sdeepestpossiblepoint.Usethiscontrolto

make the body of water deeper or shallower. When you change the depth of the water, the waves behave accordingly:

They move faster in deep water and slower in shallow water. (Adjusting the Height control when using the wireframe

preview may appear to lower the ground level, but the wireframe camera always moves with the water level.)

Wave Strength Controls how big the resulting waves are when the ground height or steepness is animated. A value

of 0 results in no waves.

Note: You can create a pulsing wave effect by animating the ground’s steepness so that the ground pokes through the

water, producing waves. Then use the Wave Strength control to intensify the effect.

Producer 1 and Producer 2 controls

The Producer controls specify the point at which the waves begin.

Type Specifies the type of producer. Ring creates a wave as if a stone were dropped into a pond; waves radiate

outward in circles (or ellipses, depending on the size settings of the effect point). Line creates waves that emanate

from the producer’s position in a line instead of an ellipse. This setting is useful for creating waves that look as though

they were generated from much farther away. The waves are produced perpendicular to the edges of the line. The

length of the line is based on the Height/Length setting.

Position Specifies the location of the center of the wave producer.

Height/Length Specifies the (vertical) height of a Ring producer and adjusts the length of a Line producer.

Width Specifies the (horizontal) width of the producer area.

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