Apple Motion 5.1.1 - Manual (Page 872)

Chapter 20 Shapes, masks, and paint strokes 872
Apply a Shape behavior
Do one of the following:
m Drag a behavior from the Shape category in Behaviors section of the Library to a shape, mask, or
paint stroke in the Canvas, Layers list, or Timeline.
m Select a shape, mask, or paint stroke in the Canvas, Layers list, or Timeline, then select a Shape
behavior in the Library and click Apply in the preview area.
m Select a shape, mask, or paint stroke in the Canvas, Layers list, or Timeline, then choose a Shape
behavior from the Add behavior pop-up menu in the toolbar.
The Shape behavior is applied to the shape, mask, or paint stroke.
For a description of each Shape behavior, see the behavior list in the Help table of contents (the
sidebar to the left of this window).
Apply Pen Pressure
This behavior is designed to be applied to a paint stroke created using a stylus and graphics
tablet. After you create a stroke, this behavior lets you affect the width, opacity, spacing, angle,
or jitter of the paint stroke based on the pressure of your stylus on the tablet when the stroke
was created.
Note: These parameters are identical to the Pen Pressure parameters in the Advanced pane
of the Shape Inspector. You can choose to use the Advanced pane parameters or this shape
behavior to apply the pressure data to the paint stroke. You can use a combination of Pen
Pressure parameters in the Advanced pane and Apply Pen Pressure shape behaviors to affect
more than one parameter (such as Opacity, Width, or Jitter) of the stroke using the same
pressure data.
Parameters in the Inspector
•
Apply To: A pop-up menu that sets how your paint stroke is affected by pen pressure. There are
five options:
•
Width: Pen pressure affects the width of the stroke. The harder the pressure, the wider
the stroke.
•
Opacity: Pen pressure affects the opacity of the stroke. The harder the pressure, the more
opaque the stroke.
•
Spacing: The harder the pressure, the greater the spacing between stroke dabs.
•
Angle: The harder the pressure, the greater the angle of the stroke dabs.
•
Jitter: The harder the pressure, the larger the amount of jitter on the stroke. Jitter randomizes
the position of the paint dabs so they appear more like particles.
•
Min Pressure: A slider that adjusts the minimum threshold of pressure sensitivity. Pressure
values below the minimum value are remapped to 0. For Opacity and Width, those remapped
values do not appear. For Spacing, Angle, and Jitter, the values are not modified. If the Min and
Max pressure are plotted on a graph, Min Pressure represents the minimum value, or 0. The
area of the graph between Min and Max is remapped to the output values.
•
Max Pressure: A slider that adjusts the maximum threshold of pressure sensitivity. Pressure
values above the maximum value are remapped to 1. For Opacity, Width, Spacing, Angle, and
Jitter, those values will have the greatest effect. If the Min and Max pressures are plotted on a
graph, Max Pressure represents the maximum value, or 1. The area of the graph between Min
and Max is remapped to the output values.
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