Adobe After Effects - Manual (Page 586)

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Ground
Steepness
Height
Wave Strength
Note:
Type
Position
Height/Length
Width
Angle
Amplitude
Frequency
Phase
Ground controls
The Ground controls specify the appearance of the ground layer.
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 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 brightness of the layer determines the ground surface: White represents
higher elevation, and black represents lower elevation.
Adjusts the steepness of the ground by expanding and contracting the height of the displaced wireframe. The mesh is locked at the
black level, so it always grows up from the bottom. In other words, you cannot adjust the 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.
Controls the distance between the water surface and the deepest possible point of the ground. Use this control to 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.)
Controls how big the resulting waves are when the ground height or steepness is animated. A value of 0 results in no waves.
You can create a pulsing wave effect by animating the steepness of the ground 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.
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 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.
Specifies the location of the center of the wave producer.
Specifies the (vertical) height of a Ring producer and adjusts the length of a Line producer.
Specifies the (horizontal) width of the producer area.
Specifies the angle of the wave producer area for the Line and Ring types. This control sets the orientation of the line and thus controls the
initial direction of the waves, which emanate from either side of the line, perpendicular to its length.
Controls the height of the produced wave. Higher values create more dramatic waves but may result in clipping, which you can repair
by using the Brightness and Contrast controls.
Controls how many waves are produced per second. A value of 1 has the effect of waves surfacing once every second.
Specifies where in the wave phase the wave begins. For example, with the default setting of 0°, the first disturbance in the liquid is a
convex wave (projecting upward from the surface of the water). With Phase set to 180°, the first disturbance in the liquid is a concave wave.
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