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Find Target Test 221
is needed, such as when the particles should hit
a small target. You can animate this setting (use
Sync By > Event Duration) to specify different
appropriate values, depending on the required
results.
Ease In % —Controlstheratebywhichparticles
slow down when it approaches the target point.
The software c alculates the final speed with this
formula: (100% - Ease In) * Speed. Therefore,
if the Ease In value is 100%, a part icle should
approach the target with a speed of 0, and if Ease
In is 0%, the particle doesn’t slow down at all when
approaching the target. At intermediate values, the
speed is calculated according to the distance to
the target point, as linear interpolation between
the initial (cruise) speed, and the final speed.
Whenaparticleenterstheevent,thedistanceto
the target point is calculated and later used for the
interpolation. Default=0.0.
Sync B y—Choosethetimeframetousewhen
animating Speed, Variation, and Accel Limit:
•
Absolute T ime—Any keys set for p ar ameters 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 Dura tion—Any keys set for parameters
are applied to each particle starting when it first
enters the event.
Control By Time g roup
Lets you specify the amount of time particles
should take to reach the target.
This group is una vailable when using Control By
Speed.
Timing—Determines how the software applies
thespecifiedtiming,definedbytheTimeand
Variation values. The possible options are:
•
Absolute T ime—Time refers to the overall time
of the system. Each par t icle will reach its target
at the frame number specified by Time.
•
Par ticle Age—Timereferstothetimeelapsed
since the birth of the particle. Each particle will
reach its target when its age reaches the value
specified by Time.
•
Event Dur ati on—Timereferstothetimeelapsed
since the p article entered the current event.
Each particle w ill reach its target when it has
been in the current for the number of frames
specified by Time.
Time—The number of frames particles should take
to reach the target. Default=60.
Variation—T he number of frames by which Time
can vary randomly. Default=5.
To obtain the ac tua l time to t he target for each
spawned particle, the system multiplies the
Var i a t i o n v a l u e by a r a n d o m numbe r b e t w e e n
-1.0 and 1.0, and then adds the result to the Time