Apple Motion 5.1.1 - Manual (Page 874)

Chapter 20 Shapes, masks, and paint strokes 874
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Invert: A checkbox that inverts the attributes of the stroke created by the behavior. For
example, if pen speed 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.
Apply Pen Tilt
When you use a stylus to create paint strokes using the paint stroke tool, this behavior controls
the width, opacity, spacing, angle, or jitter of the paint stroke based on the tilt of the pen while
creating strokes.
Note: You can use a combination of Apply Pen Tilt shape behaviors to affect more than one
parameter (such as Opacity, Width, or Jitter) of the stroke using the same tilt data.
Parameters in the Inspector
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Apply To: A pop-up menu that sets how your paint stroke is affected by the tilt of your pen as
you draw. There are five options:
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Width: The tilt of the stylus affects the width of the stroke. The greater the tilt, the wider
the stroke.
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Opacity: The tilt of the stylus affects the opacity of the stroke. The greater the tilt, the more
opaque the stroke.
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Spacing: The greater the tilt of the stylus, the greater the spacing between stroke dabs.
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Angle: The greater the tilt of the stylus, the larger the value of the angle of the stroke.
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Jitter: The greater the tilt of the stylus, the larger the amount of jitter on the stroke. Jitter
randomizes the position of the paint dabs so they appear more like particles.
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Calculate Tilt: A pop-up menu that sets how the tilt of the stylus affects the stroke. Pen tilt is
measured on two axes: X and Y. X represents the stylus tilting to the right and left (toward the
right or left side of the tablet); Y represents the stylus tilting up and down (toward the top or
bottom of the tablet). There are five menu options:
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Absolute: Takes the maximum tilt from any axis.
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X Only: Measures the tilt only on the X axis.
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Y Only: Measures the tilt only on the Y axis.
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Axis: Makes the Tilt Axis parameter (described below) available.
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Polar: Uses the tilt of the stylus as if it were an angle. When viewed from above, the stylus
points in a specific direction. That angle represents a polar value.
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Tilt Axis: A dial and value slider, available when Calculate Tilt is set to Axis, that defines the axis
along which the tilt is measured.
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Min Tilt: Adjusts the minimum threshold of tilt sensitivity. Tilt 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 tilt are plotted on a graph,
Min Tilt represents the minimum value, or 0. The area of the graph between Min and Max is
remapped to the output values.
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Max Tilt: A slider that adjusts the maximum threshold of tilt sensitivity. Tilt 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 tilt are plotted on a graph, Max Tilt 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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