Apple Motion 2 - Manual (Page 603)

Chapter 8 Working With Particles 603
Scale Range: A slider that defines an amount of variance in the scale of generated
particles. A value of 0 results in no variance—all particles from the selected cell emerge
with the same size. A value greater than 0 introduces a variance defined by the Scale
parameter, plus or minus a random value falling within the Scale Range. The disclosure
triangle of the Scale parameter reveals separate X and Y subparameters, which can be
used to set the width and height of the Scale Range separately. This parameter is not
available if the emitter contains more than one particle cell.
Attach To Emitter: A slider that determines how closely particles follow the position of
a moving emitter. If it is set to zero, particles follow their own path after being emitted,
resulting in a trail of particles that trails along the motion path the emitter is following.
If it is set to 100, in the absence of other behaviors, all generated particles follow along
with the emitter, surrounding it in a moving cloud of particles. This parameter is not
available if the emitter contains more than one particle cell.
Show Particles As (single cell emitter/particle cell parameter): You can view particles
in one of a variety of preview modes, or as they actually appear. These nonimage
modes play more efficiently when viewing a complex particle system and also provide
other ways of analyzing particle motion. By default, this parameter is set to Image,
which displays each particle as it is supposed to appear. This parameter is not
available if the emitter contains more than one particle cell. There are four options
from which to choose:
Attach to Emitter set to 0 (zero) Attach to Emitter set to 100
01112.book Page 603 Sunday, March 13, 2005 10:36 PM