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Find Target Test 217
is needed, such as when the particles should hit
a small target. You can a nimate this settin g (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 calculates the final speed with this
formula: (100% - Ease In) * Speed. Therefore,
if the Ease In va lue is 100%, a particle 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
inter polation. Default=0.0.
Sync B y—Choosethetimeframetousewhen
animating Speed, Variation, and Accel Limit:
•
Absolute T ime—Any keys set for parameters are
applied at the actual f rames 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 Duration—Any keys set for parameters
are applied to each particle starting when it first
enters the event.
Control B y Time group
Lets you sp ecify the amount of time part icles
should take to reach the target.
This group is unavailable when using Control By
Speed.
Timing—Determines how the software applies
thespecifiedtiming,definedbytheTimeand
Variation values. The possible options are:
•
Absolute Time—Time refers to the overall time
of the system. E ach part icle w ill reach its target
at the frame number specified by Time.
•
Par ticle Age—Timereferstothetimeelapsed
since the birth of t he par ticle. Each particle will
reach its target when its age reaches the value
specified by Time.
•
Event Durat ion—Timereferstothetimeelapsed
since the part icle 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 part icles should take
to reach the target. Default=60.
Variation—T he number of fra mes by which Time
can vary randomly. D efault=5.
To obtain the actual t ime to the target for each
spawned particle, the system multiplies the
Var i at i o n v a lue b y a r a n d o m nu m b e r b e t w e e n
-1.0 and 1.0, and then adds the result to the Time