Graphics Programs Reference
In-Depth Information
play particles unless you create a cache file. You'll learn how to create a particle disk
cache later in this chapter. But for the most part, particles need to be played back to
run properly.
You'll notice a mass of round circles streaming out of the emitter in all directions (see
Figure 12.16). These are the nParticles.
Figure 12.15
Creation options for an nParticle emitter
Figure 12.16
An Omni emitter emits a swarm of cloud particles in all directions.
Emitter Attributes
You can control how particles are created and behave by chang-
ing the type of emitter and adjusting its attributes. Here are the
most often used emitters:
Omni
Emits particles in all directions.
Directional
Emits a spray of particles in a specific direction, as
shown in Figure 12.17.
Volume
Emits particles from within a specified volume, as
shown in Figure 12.18. The volume can be a cube, a sphere, a
cylinder, a cone, or a torus. By default, the particles can leave
the perimeter of the volume.
Figure 12.17
Cloud nParticles sprayed in a specific direction
