Apple Motion 5.1.1 - Manual (Page 875)

Chapter 20 Shapes, masks, and paint strokes 875
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Scale: A slider that determines the magnitude of the effect. The Scale slider defines the output
range for the dabs based on the mapped values between minimum (0) and maximum (1)
tilt, multiplied by the value defined in the slider (or adjacent value slider). This amount is
then applied to the parameter (width, opacity, and so on) by multiplying (for width, opacity,
spacing, and jitter) or adding (for angle). This control is independent of the Scale parameter in
the Stroke pane.
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Invert: A checkbox that inverts the attributes of the stroke created by the behavior. For
example, if pen tilt is set to affect the width of the stroke, thin areas of the stroke become wide
and wide areas become thin when the checkbox is selected.
Oscillate Shape
The Oscillate Shape behavior animates a shape by cycling its control points between two
values. You can customize how wide apart the high and low values are, as well as the number of
oscillations per minute. This behavior is useful for creating fluid shape movements (think shape
yoga) that would be time-consuming to keyframe.
When the Oscillate Shape behavior is applied to a shape, all control points of the shape are
affected by default. When the behavior is selected in the Layers list, affected control points
are highlighted in white on the blue shape behavior spline. To disable control points, click the
control points. A disabled point appears blue.
Parameters in the Inspector
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Wave Shape: A pop-up menu that sets the shape of the oscillation’s wave. The options are
Sine (default), Square, Sawtooth, and Triangle. For more information on wave shapes, see
Oscillate on page 342.
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Phase: A slider that adjusts the point of the specified oscillation where the behavior starts. Use
this control to place multiple shapes with identical Oscillate behaviors out of phase with one
another (so they don’t all look the same).
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Amplitude: A slider that adjusts the maximum values that the control points oscillate between.
The control point swings between the amplitude value, and the negative of the amplitude
value. Higher values result in more extreme swings from the beginning to the ending of
each oscillation.
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Speed: A slider that adjusts the speed at which the oscillation occurs, in oscillations per minute.
Higher values result in faster oscillations.
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Alternate Phase: A checkbox that offsets the motion of each control point by a phase of 180
degrees from its neighboring control point.
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Oscillate Around: A pop-up menu that sets whether the oscillation for each vertex is generated
from a point or a perpendicular line. There are two options:
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Point Origin: Each vertex’s oscillation is generated from a point. You can change the location
of the point using the onscreen controls (dragging the small blue circle at the center of the
shape) or using the X and Y Origin parameters in the Inspector.
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Line: Each vertex’s oscillation is generated from a line. You can change the location of the
line using the onscreen controls (dragging the ends of the blue dotted line) or using the
using the Start and End coordinates in the Inspector.
Randomize Shape
The Randomize Shape behavior animates the control points of a shape by applying a random
offset to each point of the shape. This behavior is useful for creating rapid and varied effects on
a shape.
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