Apple Motion 4 - Manual (Page 1102)

To switch a B-Spline control point among three degrees of curvature
Do one of the following:
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Command-click one or more selected B-Spline control points to switch between three
progressively sharper amounts of curvature.
Very Smooth B-Spline point Smooth B-Spline point Linear B-Spline point
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Control-click a B-Spline point, then choose Very Smooth, Smooth, or Linear from the
shortcut menu.
You can also adjust B-Spline control points along a sliding scale by holding down the
Command key and dragging.
To adjust the amount of curvature in a B-Spline control point by dragging
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Command-drag one or more selected B-Spline control points to make their curves
progressively sharper.
• Dragging away from the point makes the curve progressively sharper.
• Dragging toward the point makes the curve progressively looser.
Note: Once the handle appears, you can modify the curve without the Command key.
Drag the handle away from the point to make the curve sharper. Drag the handle toward
the point to make the curve looser.
If you later decide you don’t like the B-Spline curve adjustment you made, you can always
reset the degree of curvature by Command-clicking the point (or Control-clicking and
choosing an option from the shortcut menu) to revert it to the default curvature amount.
Using a Shape Outline as a Paint Stroke
You can convert a shape outline into a paint stroke by modifying the Brush Type in the
Inspector. Once a shape outline is assigned a different brush type, all of the paint stroke
parameters become available. You can modify and animate its brush parameters, as well
as apply the Sequence Paint behavior.
To convert an existing shape into an editable paint stroke
1 Select an existing shape.
2 In the Shape HUD or Style pane of the Shape tab, select the Outline checkbox.
1102 Chapter 17 Using Shapes, Masks, and Paint Strokes