Apple Motion 2 - Manual (Page 595)

Chapter 8 Working With Particles 595
Pattern (Rectangle, Circle, Image): Specifies how the particles are generated from the
selected pattern. The pattern options are:
• Outline: Emits particles along the edge of the shape.
• Tile Fill: Emits particles from a tiled pattern of rows and columns within the circle,
rectangle, or image. You can specify the number of columns and rows, as well as the
Tile Offset.
• Random Fill: Emits particles randomly from within the circle, rectangle, or image.
Size (Rectangle): Defines the size of the rectangle from which particles are emitted.
This parameter is available whether the Pattern is set to Outline, Tile Fill, or Random Fill.
Note: The Height is measured in project pixels, however, the Width is measured in
square pixels. This is done so that a shape which is numerically square will look square
when “Correct for Aspect Ratio” is turned on in the View pop-up menu in the top-right
corner of the Canvas.
Points (Line, Rectangle, Image, or Circle [Outline or Random Fill], Burst, Spiral, Wave,
Geometry): Defines the number of points from which particles are emitted. For
Rectangle or Circle shapes, the particles are emitted from evenly-distributed points
along the edge of the shape when Outline is selected from the Pattern pop-up menu.
When the Adjust Item tool is selected, the points are visible in the Canvas.
Note: Using a large number of points slows your computer’s processing time.
Emit At Points (Line, Rectangle or Circle [Outline], Burst, Spiral, Wave, Geometry): When
turned on, particles emerge from a limited number of points (as defined in the Points
parameter). When turned off, particles may emerge from anywhere on the line or edge.
When the Adjust Item tool is selected, the points are visible in the Canvas.
Radius (Circle, Burst, Spiral): Defines the size of the shape from which particles are
emitted.
Tile Offset (Rectangle, Circle, Image): This parameter appears when Tile Fill is selected
from the Pattern pop-up menu. Values from 0 to 100 percent offset the rows toward the
right, and values from 0 to –100 percent offset the rows toward the left. A value of 50
or –50 percent creates a “brickwork” pattern.
Columns (Rectangle, Circle, Image): When Tile Fill is selected, this parameter specifies
the number of horizontal emitter points on a grid over the selected emitter shape. In
the case of an irregular shape (nonrectangular), grid points that fall outside of the
shape are ignored.
Rows (Rectangle, Circle, Image): When Tile Fill is selected, this parameter specifies the
number of vertical emitter points on a grid over the selected emitter shape. In the case
of an irregular shape (nonrectangular), grid points that fall outside of the shape are
ignored.
01112.book Page 595 Sunday, March 13, 2005 10:36 PM