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146 Chapter 11: Space Warps and Particle Systems
The default script (3dsmax\scripts\particleflow\
example-scriptbirth.ms) emits par ticles for 100
frames in a wavy, circular path. To see this, turn
off or delete any Speed and Position operators in
the event.
See also
Birth Operator (page 2–143)
Inter face
The user interface appears in the parameters panel,
ontherightsideoftheParticleViewdialog.
Edit S cr ipt—Click this button to open the cur rent
script in a MAXScript Editor window.
For detailed information about the MAXScript
utility, open the MAXScript Reference, available
from Help menu > MAXScript Reference.
Emit Star t—The frame number at which the
operator begins emitting particles.
Uniqueness group
The Uniqueness setting provides a randomization
seed that the script c an use or i gnore.
Seed—Specifies a randomization value.
New—Calculates a new seed using a randomization
formula.
Delete Operator
Partic le View (page 2–125) > Click Delete in a n event or add
a Delete operator to the particle system and then select it.
Use the Delete operator to remove particles from
theparticlesystem. Bydefault,particleslive
“forever ,” that is, for the duration of the animation.
The Delete operator l ets you give them a fin ite life
span. This is useful for eliminating particles once
they’ve served their purpose in the animation.
The Delete operator is a lso necessary when using
the Particle Age map, which, when incorporated
into the Material Dynamic operator, applies
different materials to particles depending on their
age. Because the map works on the basis of a
percentage of the p article’s life span, you need
to use a Delete operator to define the particles’
maximum age. For an example of usage, see
Material Dynamic operator (page 2–191).
Interfa ce
The user interface appears in the Parameters panel,
on the right side of the Particle View dialog.
Remove group
Choose whether to delete all particles, selected
particles, or particles past a specific age.