9

68 Chapter 11: Space Warps and Particle Systems
is applied for each vector within a spherical
volumewhoseradiusissetbytheRangesetting,
when Unlimited Range is off.
Radial/Tangential—Radial specifies the
percentage of particle motion toward or away
from the center of the Drag icon that ’s affected
by the damping. Tangential specifies the
percentage of particle motion across the bo dy
of the Drag icon that ’s affected by the damping.
Range—Specifies the distance from the center
of the Drag icon, in system units, within which
dampingisinfulleffect.Takeseffectonlywhen
Unlimited Range is turned off.
Fa lloff—Specifies the distance beyond the
Radial/Tangential Range within which Linear
Damping is applied. Damping is strongest at
the Range distance, decreases linearly out to the
limit of the Falloff, and has no effect beyond
that. While Falloff takes effect only beyond the
Range, it is measured from the center of the
icon, and always has a minimum value equal
to the Range value. Takes effect only when
Unlimited Range is turned off.
•
Cylindrical Damping—When Drag operates
in Spherical Cylindrical mode, its icon is a
cylinder within a cylinder. Particle motion is
broken up into radial, tangential, and axial
vectors.Dampingisappliedwithinaspherical
volume for the radial and t angential vectors and
on a planar basis for the axial vector.
Ra dial/Tangential/Ax ial—Damping cont rols
thepercentageofparticlemotiontowardor
away from the center of the circular portion
of the icon (Radial), across the radial vector
(Tangential), or along the length of the icon’s
long axis (Ax ial) that’s affected by the damping ,
on a per-frame basis.
Range—Specifies the distance from the center
of the Drag icon, in system units, within which
Radial and Axial damping are in full effect.
Range also specifies the thickness of the infinite
plane that governs the range of Axial damping.
Takes effect only when Unlimited Range is
turned off.
Fa lloff—Specifies the distance beyond the
Radial /Tangential/Axial Range within which
Linear Damping is applied. Damping is
strongest at t he Range distance, decreases
linearlyouttothelimitoftheFalloff,andhas
no effect beyond that. While Falloff ta kes effect
only beyond the Range, it is measured from the
center of the icon, and alwa ys has a minimum
valueequaltotheRangevalue.Takeseffect
only when Unlimited Range is turned off.
Display group
Icon S ize— Specifies the size of the icon.
PBomb Space Warp
Create panel > Space Warps > Forces > Objec t Type
rollout > PBomb
Createmenu>SpaceWarps>Forces>PBomb
ThePBombspacewarpcreatesanimpulsewaveto
blow up a particle system, as distinguished from
the Bomb space warp (page 2–105),whichblowsup
geometry. The PBomb is particularly well suited
to the Part icle Array (PArray) system with Particle
Types set to Object Fragments. This space war p
also applies an impulse as a dynamics effect.
Thegeneralusageisasfollows:
• Create a particle system (recommended: a
PArray system (page 2–256) set to Object
Fragments).
•
Create a PBomb and use Bind to
Space Warp (page 2–58) to bind it to a
non-event-driven p article system. Be sure to
bindthePBombtotheparticlesystemandnot
to the distribution object. Or, if using Particle