Apple Motion 2 - Manual (Page 597)

Chapter 8 Working With Particles 597
Note: When using an emitter shape other than a point, such as a line, circle, rectangle,
spiral, burst, or wave, setting the Emission Angle parameter to 0 degrees restricts the
emission of particles to the outside of the shape. Setting the Emission Angle to 180
degrees restricts the emission of particles to the inside of the shape.
Emission Range (all shapes): A dial that restricts the area around the center of each
emission point into which particles are generated, in the direction of the Emission
Angle. It is equivalent to one of the functions of the graphical Emission control in the
Dashboard. This parameter is unique to the emitter object.
Note: When using a line, circle, rectangle, spiral, burst, or wave (but not geometry),
setting the Emission Range parameter to 0 degrees keeps particles perpendicular to
the emitter when they emerge.
Render Order: A pop-up menu that determines whether new particles are drawn on
top of or underneath particles that have already been generated. There are two
options:
• Oldest First: New particles appear on top of older particles.
• Oldest Last: New particles appear underneath older particles.
Interleave Particle Cells: Turning this checkbox on mixes particles generated from
multiple cells together. Turning this checkbox off layers particles in the same order as
the cells that generate them.
Note: This option has no effect with particle systems containing only one cell. Leaving
this option off will speed rendering with multiple cells.
Single-Cell Emitter and Particle Cell Parameters
The following parameters apply to the creation and motion of the individual particles
generated by each cell within an emitter.
01112.book Page 597 Sunday, March 13, 2005 10:36 PM