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212 Chapter 11: Space Warps and Particle Systems
Inter face The user interface appears in the parameters panel,
on the right side of the P article View dialog.
In the context of Collision Spawn, a
parent is the
original particle from which new particles are
spawned.
Test True for group
These check boxes let you specify which particles,
if any, should become eligible for redirection to the
next event upon satisfaction of the test conditions.
Note: After a particle tests True, the Collision
Spawn test no longer tests the particle for collision.
If you simply want particles to spawn every time
they collide, turn either or both of these off and
use a different test for redirection.
Parent Par ticles—When on, parent particles qualify
for redirection when the test conditions are met.
Default=on.
When using the
SpawnOnFirstCollisionoption ,
Parent Particles is available only when Delete
Parent is off.
This option is also available when using the
Spawn
On Each Collision option
.Inthiscase,parent
particles test True only af ter colliding the number
of times specified by the Until # value.
Spawn Particles—When on, spawned p articles
qualify for redirection when the test conditions are
met. Default=on.
Deflectors group
This group displays the deflectors currently in
effect, and let you add and remove deflectors.
[list]—Shows the deflectors t hat apply to this
operator. If more than three deflectors apply, a
scroll bar appears at the r ight side of the l ist.
If you delete a listed space warp from the scene,
itsnameisreplacedinthelistbytheentry
“<deleted>”.