9

Split Selected Test 235
Inter face
The user interface appears in the parameters panel,
ontherightsideoftheParticleViewdialog.
Test True For group
Lets you choose how to split the particle stream.
Default=Fr action Of Par t icles, 50%.
Fraction Of Particles—Split the particle stream on
a p ercent age basis, specified with the Ratio value.
With Ratio g reater than 0.0, whether a par ticular
particle is split off depends on a randomization
factor; change this with the Uniqueness Seed value.
Ratio—Specify the percentage of par ticles that w ill
test Tr ue. Animatable. Default=50.0.
Available only with the Fraction Of Particles
option.
Ever y Nth Par ticle—Splits off a regular sample of
particles.
N—Specify how often to split off a particle.
Animatable. Default=3.
For example, enter 8 to split off every eighth
part icle.
Available only with the Every Nth Particle option.
First N Par ticles—Splits off the number of particles
specified as the N va lue (below), start ing with the
firstparticletoentertheevent,andretainstherest.
Particles Af ter N First—Splits off all particles
starting with the first one after N particles, as
specified with the N p arameter ( below). All
particlesstartingwiththefirsttoentertheevent
up to N are retained in the event.
N—Specify the number of particles to split off,
with First N Particles, or to retain in the event,
with Particles After N First.
Available only with the First N Particles or the
Particles After N First option.
Per Emission S ource—When on, the software
applies the N value for the options First N Particles
and Particles After N First separately for each
emission source.
UsethisoptionwithmultipleParticleFlowsources
converging into a single Split Amount test.
Uniqueness group
The Uniqueness sett ing enables randomization of
particle retention with the Fraction Of Particles
option.
Seed—Specifies a randomization value.
New—Calculates a new seed using a randomization
formula.
Split S elected Test
Particle View (page 2–125) > Click Split Selected in an
event or add Split Selected to the part icle system and
then select it.
The Split Selected test lets you split the particle
stream based on particles’ select ion status. For
information about selecting particles, see Selection
rollout (page 2–138).