9

Collision Spawn Test 217
Add—
Click this button, and then select a Deflector
spacewarpinthescenetoaddittothelist.
By List—Click this button, and then use the Select
Deflectors dialog to add one or more space warps
to the list. The space warps must already exist in
the scene.
Remove—Highlight a deflector in the list, and then
click this button to remove it from the list. Any
removed s pace warps remain in the scene.
Spawn R ate And Amo unt group
Use these settings to specify w hen p articles are
to spawn and other values related to how many
particles are spawned.
Spawn On First Collision—Particles spawn only the
first time they collide with a deflector.
Delete Parent—When on, deletes each ori ginal
particle from which a new one is spawned.
Available only with the Spawn On First Collision
option.
SpawnOnEachCollision—Particles spawn on each
of multiple collisions, up to a limit specified with
the Until # parameter.
Until #—The maximum number of collisions by the
parent particles that produce spawned particles.
AvailableonlywiththeSpawnOnEachCollision
option. Default=3.
When Test True For > Parent Particles is on, parent
particles test True only after colliding the number
of times specified by the U n til # value.
Spawnable—Thepercentageofparticlesinthe
current event that will spawn new par ticles. This is
determined once for each particle, when it enters
the event. However, the parameter is animatable.
Default=100.0.
For values other than 100.0, Spawnable uses a
randomized selection process, which is affected
by the Uniqueness Seed value. For example,
w ith five parent particles, Offspring # =1, and
Spawnable=80.0, you might get any number of
spaw ned par ticles between two and five for each
collision. The average per spawning would be four,
however.
Offspring # —The number of new part icles the
system creates f rom each p arent particle for each
spawning event. Default=1.
Variation—TheamountbywhichtheOffspring#
value can vary ra ndomly. Default=0.0.
To obtain the actual test value for each particle, the
system multiplies the Variation value by a random
number between -1.0 and 1.0, and then applies the
result as a percentage of the Offspring # setting.
For example, if Offspring #=2 0 and Vari ation=10,
then the actual number of offspring for each
particle would be b etween 18 and 22.
Sync B y—Choosethetimeframetousewhen
animating Offspring # and Variation:
•
Absolute T ime—Any keys set for parameters are
applied at the actual frames for which they’re
set.
•
Particle Age—Any keys set for par ameters are
applied at the corresponding frames of each
particle’s existence.
•
Event Dur at ion—Any keys set for parameters
are applied to each particle starting when it first
enters the event.
•
Restart Particle Age—When on, sets t he age of
each newly spawned particle at 0. When off,
each spawned particle inherits its parent’s age.
Default=on.
Speed group
Lets you specify the behavior of spawned particles,
as well as their speed in absolute terms or relative
to the parents’ speed, with optional r andom
variation. The direction of a spawned particle is
alwa ys in relation to that of its parent, but you can