Apple Motion 3 User Manual
Page 1052
1052
Chapter 12
Using Shapes and Masks
In the following illustrations, the Spacing Over Stroke curve is adjusted so that a greater
value is used at the start of the stroke, and 100% is used at the end of the stroke. The
dabs at the beginning of the stroke are spaced more widely apart and get closer at the
end of the stroke.
Two parameters let you fine-tune the curve in the graph:
 Spacing Over Stroke: Use the sliders or enter a number in the value field to change
the value of the selected keyframe.
 Stroke Length: Stroke Length is mapped horizontally on the mini-curve editor graph
and provides a visual representation of the position of the changes in spacing value
(keyframes) over the length of the stroke. Use the sliders or enter a number in the
value field to change the value of the selected keyframe.
Note: For information on using the mini-curve editors, see “
Fixed Brush Dabs: When animating brush strokes using behaviors or keyframes,
selecting the Fixed Brush Dabs checkbox keeps the number and spacing of the dabs
constant regardless of the changes in the stroke’s shape over time.
Anchor Dabs To: This parameter, available when the Fixed Brush Dabs checkbox is
turned off, defines whether dabs are added to or removed from the start point or the
start and end points of a paint stroke when the length of the paint stroke is modified.
When the Fixed Brush Dabs checkbox is turned on, dabs are anchored to the start and
end of the paint stroke.
Note: Changing a shape’s control points or adjusting the Width or Spacing parameters
(in the Style pane) or Spacing Over Stroke and Width Over Stroke parameters (in the
Stroke pane) affect the dab spacing because larger dabs can be spaced further apart.
Modified curve yields more spacing toward the
beginning of the stroke and less spacing
toward the end of the stroke.
Spacing Over Stroke mini-curve editor