Apple Motion 3 - Manual (Page 1066)

1066 Chapter 12 Using Shapes and Masks
 Angle: The faster the movement of the pen, the greater the angle of the stroke dabs.
 Jitter: The faster the movement of the pen, the larger the amount of jitter on the
stroke. Jitter randomizes the position of the paint dabs so they appear more like
particles.
Min Speed: Adjusts the minimum threshold of speed sensitivity. Speed values below
the minimum value are remapped to 0. For Opacity and Width, that section of the
stroke does not appear. For Spacing, Angle, and Jitter, the values will not be modified. If
the Min and Max speeds are plotted on a graph, Min Speed represents the minimum
value, or 0. The area of the graph between Min and Max is remapped to the output
values.
Max Speed: Adjusts the maximum threshold of speed sensitivity. Speed values above
the maximum value are remapped to 1. For Opacity, Width, Spacing, Angle, and Jitter,
that section of the stroke will have the greatest effect. If the Min and Max speeds are
plotted on a graph, Max Speed represents the maximum value, or 1. The area of the
graph between Min and Max is remapped to the output values.
Scale: Determines the magnitude of the effect. Defines the output range for the dabs
based on the mapped values between minimum (0) and maximum (1) speed,
multiplied by the value defined in the slider (or value field). This amount is then applied
to the channel (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.
Invert: This checkbox 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 are using a stylus to create paint strokes, this behavior allows you to affect
the width, opacity, spacing, angle, or jitter of the paint stroke based on the tilt of the
pen while creating strokes.
Apply To: Use this pop-up menu to select how your paint stroke is affected by the tilt
of your pen as you draw.
 Width: The tilt of the stylus affects the width of the stroke. The greater the tilt, the
wider the stroke.
 Opacity: The tilt of the stylus affects the opacity of the stroke. The greater the tilt,
the more opaque the stroke.
 Spacing: The greater the tilt of the stylus, the greater the spacing in between the
dabs of the stroke.
 Angle: The greater the tilt of the stylus, the larger the value of the angle of the
stroke.