Apple Motion 4 - Manual (Page 634)

• Box: This option is available when the 3D checkbox is selected in the Emitter tab.
Particles are emitted from a three-dimensional cube along its surface (Outline), 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 front horizontal edge to
adjust height; drag the front vertical edge to adjust width; drag a back edge to adjust
depth; drag a front corner to simultaneously adjust the width and height. To reposition
the emitter, drag in the shape (but not on an edge or corner point). Depending on the
selected Arrangement, the Box shape displays additional parameters. In the following
image, the box’s Arrangement is set to Tile Fill.
• Sphere: This option is available when the 3D checkbox is selected in the Emitter tab.
Particles are emitted from a three-dimensional sphere along its surface (Outline) or in
a tile or random fill pattern. Using the onscreen controls (with the Adjust Item tool),
you can specify the radius and location of the sphere. Drag the outline of the sphere
to adjust its radius; drag within the sphere to reposition it in the Canvas. When Sphere
is selected, the Arrangement parameter becomes available. Depending on the selected
Arrangement, the Sphere shape displays additional parameters.
Arrangement: This parameter appears when Rectangle, Circle, Image, Box, or Sphere is
chosen in the Shape pop-up menu. Specifies the pattern from which the particles are
generated. The arrangement options are:
• Outline: Emits particles along the edge of the shape in 2D emitters and along the surface
of the shape in 3D emitters.
• Tile Fill: Emits particles from a tiled pattern of rows, columns, and ranks (3D emitters)
within the circle, rectangle, image, box, or sphere. You can specify the number of
columns, rows, and ranks, as well as the Tile Offset.
• Random Fill: Emits particles randomly from within the circle, rectangle, image, box, or
sphere.
634 Chapter 11 Working with Particles