Apple Motion 5.1.1 - Manual (Page 864)

Chapter 20 Shapes, masks, and paint strokes 864
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Angle Over Stroke: A dial that adjusts the angle of the dab at the selected keyframe.
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Stroke Length: A slider that determines where along the range of the dabs within the stroke
the Angle Over Stroke value (for the selected keyframe) is applied.
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Brush Angle Randomness: A dial that defines an amount of variance in the rotation of the stroke
dabs. A value of 0 results in no variance—all dabs have the same rotational value. A value
greater than 0 introduces a variance. The angle for an individual dab is defined by the Brush
Angle and Angle Over Stroke parameters, plus or minus a random value falling within the
Brush Angle Randomness. Using the default dial modifies the Z angle. To modify the rotation
of the dabs in X, Y, and Z space, or to access the Animate parameter, click the disclosure
triangle when the Local 3D checkbox is selected.
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Animate: A pop-up menu, available when the Local 3D checkbox is selected, that lets
you change the interpolation for animated 3D rotation channels. Click the Brush Angle
Randomness disclosure triangle to display the Animate parameter. By default, Animate is set
to Use Rotation.
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Use Rotation: Dabs rotate from their start rotation to their final rotation. Depending on the
animation, the elements may rotate multiple times before reaching their final orientation
(the last keyframed value). For example, if the X, Y, and Z Angle parameters are animated
from 0 degrees to 180 degrees in a project, the elements rotate on all axes before reaching
their final orientation.
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Use Orientation: Dabs rotate more smoothly and without multiple rotations. This option
interpolates between the dabs’ start orientation (first keyframe) and their end orientation
(second keyframe).
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Local 3D: A checkbox that lets you take advantage of the Motion 3D workspace. When the
Local 3D checkbox is selected, the following become possible:
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When the Face Camera checkbox is selected, paint dabs actively face the camera when the
camera or stroke is rotated and/or animated.
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When the Dab Depth Ordered checkbox is deselected, dab ordering remains consistent
when the paint stroke (or the camera) is rotated in X or Y space. When this checkbox is
selected, the dabs jump in front of each other each time the stroke rotates 180 degrees.
In other words, this checkbox draws the dabs in the stroke according to each dab’s actual
3D position in the project. Dabs that are closer to the camera appear closer; dabs that are
farther from the camera appear more distant.
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When the Dynamics checkbox is selected in the Advanced pane, a paint stroke acts similarly
to an emitter—the dabs become particles. When the Local 3D checkbox is selected, the
dabs are animated in 3D space. When the Local 3D checkbox is deselected, the particles are
animated in X and Y space only. For more information on Dynamics, see
Advanced pane on
page 867.
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When the Dynamics checkbox is selected in the Advanced pane, dabs can be pulled out of
their plane when some Simulation behaviors are applied. For example, if a paint stroke has
an applied Attracted To behavior (with the Affect Subobjects checkbox selected), and the
target layer is in a different location in Z space, the dabs are pulled into Z space and move
toward the target layer. The paint stroke must be a member of a 3D group to be pulled out
of the X and Y planes by a behavior.
Use the following guidelines when working in 3D with paint strokes:
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Even in a 2D project, a paint stroke’s general properties can be adjusted in 3D space. For
example, you can modify the Z parameter using the Position, Scale, Rotation, and Anchor
Point controls in the Properties Inspector.
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