2010

Table Of Contents
Editing nParticle Lifespan and Radius
When you play back the simulation, notice that the nParticles are not
dissipating into the air like smoke does. This is because the nParticles lifespan
is not yet defined.
In this lesson, you make the nParticles disappear from the scene after they
reach a specified age by using the nParticle Lifespan attributes. You can set
the nParticle objects size (Radius) according to its lifespan so that nParticles
decrease or increase in size as they age.
To set nParticle Lifespan
1 In the Outliner, select nParticle_Smoke.
2 In the Attribute Editor, click the nParticle_SmokeShape tab.
3 In the Lifespan section, select Random range from the Lifespan Mode
list.
4 Play back the simulation.
The nParticles now die (disappear from the scene) shortly after they are
emitted. nParticle Lifespan is measured in seconds, meaning that at a
Lifespan of 1.0, the nParticles die after one second.
Editing nParticle Lifespan and Radius | 935