Graphics Reference
In-Depth Information
Figure 6-20
Harmonic force field
Charge
Chargeattractsorrepelsparticleswhichthemselveshaveachargevalue.Thechargevalueissetona
particlesystemintheForceFieldSettingpanel.Oppositechargesattract,andsimilarchargesrepel.Aparticle
system with no charge active on it will not be affected at all by an external charge force field.
Lennard-Jones
Lennard-Jones represents Lennard-Jones potential, a force that acts upon pairs of particles.
The force depends on the proximity of particles and the particles' size values. At very small distances, the
force is repellent. As the distance between effector particles and affected particles increases, the force be-
comes attractive.
Texture
Textureforcefieldsexertdirectionalforcesbasedonthevaluesofatexture.Redvaluesinthetexture
representforcealongthex-axis,greenvaluesrepresentforcealongthey-axis,andbluevaluesrepresentforce
along the z-axis.
Curve Guide
Curve Guide creates a force that follows the shape of a curve.
Boid
Boid force fields affect the behavior of boids, either attracting them (“food”) or repelling them (“pred-
ators”).
Turbulence
Turbulence causes chaotic swirling movement. This force field is excellent for creating the kind
of swirling, chaotic patterns that you might see in a blizzard.
Drag
Drag creates a force similar to wind resistance on particles, generally slowing them down.
Although any single object can have only one force field active on it, it is possible for multiple force field
objectstooperateonasingleparticlesystematthesametime.Forceparametersarekeyable,soyoucancontrol
