8

Path Follow Space Warp 67
a portion of the particle system, only that part of
the system is affected.
If you tur n on R ange Indicator (see following), t he
extent of the range is indicated by a tri-hooped
sphere. If you choose Unlimited Range, this
parameter has no effect.
Display Icon group
These options affect the visual display of the
PBomb icon.
Icon Size—Alters the overall size of the PBomb
icon.
R ange Indicator —Displays a wireframe sphere
that indicates the volume of the part icle b omb’s
influence. If you choose Unlimited Range, turning
this on has no effect.
Pa th Foll ow Sp a ce Warp
Create panel > Space Warps > Forces > Objec t Type
rollout > Path Follow
Create menu > Space Warps > Forces > Path Follow
Particles following a spiral path
The Path Follow space warp forces part icles to
follow a spline path.
Pr ocedur es
To create a Path Follow space warp:
1.
On the Create panel, click Space
Warps. Choose Forces from the list, then on the
Object Type rollout, click Path Follow.
2. Click and drag in a viewport to define the size.
The Path Follow warp appears as a box-shaped
icon containing curved lines that indicate
hypothetical paths.
To set up and use Path Follow:
1.
Create a shape consisting of a single spline.
(You can use shapes with multiple splines, but
the software uses only one spline for the path.)
2. Create a particle system and set its parameters
to emit particles over a range of frames.
3. OntheCreatepanel,clickPathFollow,and
draginaviewporttocreatethePathFollow
icon (a cube with wavy lines). The display and
position of this icon don’t affect the particles.
4. On the Basic Par ameters rollout, click Pick
ShapeObjectandselectthesplineyoucreated
earlier.
5. Bind the Path Follow icon to the particle
system.
6. Adjust the Path Follow parameters to create the
particle movement you want.
Note: You can further animate the particle effect
by animating the spline vertices.
Tip: To adjust the position of the path or particle
system while maintaining access to the Path
Followparameters,turnonModifierStack
rollout > Pin Stack while the P ath Follow space
warp is selected.
If the particles don’t follow the emitter after it’s
moved, then change any PathFollow parameter,
and the motion w i ll be corrected.