8
Using Interparticle Collision 239
Ex ample: Adding spawning effects:
1.
OntheParticleSpawnrollout,chooseSpawn
on Death.
2. Leave Spaw ns spinner at 1, and set the
Multiplier to 2.
3. Set t he Direction Chaos spinner to 50.
4. Drag the time slider slowly over f rames 8 to 25
(approximately).
At frame 10, two pyramids appear at the
death of the original par ticle (because of the
Multiplier setting), and move off in different
directions (because of the Direction Chaos
setting). All particles die after frame 20 b ecause
only one generation of spawned particles is
specified.
5. Set Spawns to 4,andtheMultiplierto4.
6. Dragthetimeslideroverframes8to50.
With each spawned generation the particles
increase exponentially.
Exa mple: To mutate the objects:
1.
In the Object Mutation Queue group, click Pick
Object, and then select the cylinder.
The name of the cylinder appears in the list
window.
2. Click Pick Object and select the pyramid. Then
click Pick Object again, and select the cylinder.
Your list now reads: Cylinder01, Pyram id01,
Cylinder01.
3. Dragthetimeslideroverframes0to50.
The pyram id appears over frames 0 to 10, then
changes to four cylinders at f rame 11, then 16
pyramids at the next spawning, and so on.
Using Interpar ticle Collision
Particles colliding and then rebounding
You can set up particles to detect collisions w ith
each other. This can be useful when the particles
are meant to model solid objects such as marbles.
Procedure
Example: To create par ticles that collide with each
other:
1.
Create a Super Spray particle emitter, and place
a
Deflector space war p (page 2–86)
ashort
distance from it with the surface of the deflector
perpendicular to the stream of the particles.
Bind the deflector to the Super Spray.
2. Set the Super Spray values as follows:
•OffAxis:1,Spread:1,OffPlane:180,
Spread: 180
•Mesh:chosen,PercentofParticles:100
• ParticleQuantity:UseRatechosen and set
to: 1
• Speed: 3,Variation:100%
•EmitStart:0,EmitStop:5,DisplayUntil:
100,Life:100
•Size:4.0,GrowFor:0,FadeFor:0
•ParticleType:Sph er e