Apple Motion 2 - Manual (Page 591)

Chapter 8 Working With Particles 591
Line: Particles emerge from a line. Using the onscreen controls (with the Adjust Item
tool) or the Inspector, you can specify the length and location of the line. In the
Inspector, you can set a specific number of points from which particles emerge. This
emitter shape is good for creating sheets of particles that cascade over a wide area. The
Line shape displays additional Start Point, End Point, Emit at Points, and Offset
parameters.
Rectangle: Particles emerge from a rectangle along its edge, or in a tile or random fill
pattern. Using the onscreen controls (with the Adjust Item tool), you can specify the
size and location of the rectangle. Drag the corners to adjust width and height; drag
edges to adjust width or height independently. Depending on the selected Pattern, the
Rectangle emitter shape displays additional parameters. In the following image, the
Emitter shape fill Pattern is set to Outline.
Use the following modifier keys to more precisely manipulate the corners of the
Rectangle onscreen controls:
• Option: Adjustments to size are scaled uniformly, with the anchor point remaining
fixed.
• Shift: Adjustments to size are made proportionally.
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