8

Keep Apart Operator 169

to cause them to separate, in order to prevent or

minimize collisions among particles. Alternatively,

youcanuseanegativeforcetokeepparticlesfrom

separating too much. The operator works by

controlling particle speed and acceleration.

Note: Keep Apart doesn ’t use particle geometry;

rather, it creates a spherical force field centered on

the pivot of each particle. You can adjust the size

of the force field by changing the particle size.

Tip: In certain cases, the default settings

might not be sufficient to keep part icles from

interpenetrating. For increased separation, use

higher values for Force and A ccel Limit, choose

Relative To Particle Size, and increase the Core %

value.