8

Force Operator 201
If you delete a listed space warp from the scene,
itsnameisreplacedinthelistbytheentry
“<deleted>”.
Note: Particle Flow applies the forces to particle
motionintheorderinwhichthespacewarps
appear in the list; the effect is cumulative in
top-to-bottom order. First, the topmost space
warp is applied to particle motion, then the second
spacewarpisappliedtotheresultofthefirstspace
warp, and so on. Changing the order can alter the
final result.
Add—Click this button, and then select a force
spacewarpinthescenetoaddittotheendofthe
list.
By List—Click this button, and then use the Select
ForceSpaceWarpsdialogtoaddoneormore
space warps to the list. The space warps must
already exist in the scene.
Thesoftwareaddsspacewarpstothelistinsame
order in which they appear in the dialog. To effect
adifferentorder,usetheAddbuttontoaddthem
one at a time.
Remove—Highlight a space warp in the list, and
then click this button to remove it from the list.
Any removed space warps remain in the scene.
Force Field Overlapping—Determines how multiple
forcesthatoccupythesamevolumeofspace
affect the particles. With Additive, the forces are
combined according to their relative strengths.
With Maximum, only the force with the greatest
strength affects the particles.
For example, you might apply Wind and Gravity
space warps to particles, and set their Strength
parameters to 1.5 and 1.0, respectively. If you
choose A dditive, the Wind space warp will have
approximately 50 percent more influence over the
particles than the Gravity space w arp. But if you
choose Maximum, only the Wind space warp will
affect the particles.
Influence—Specifies the strength with which the
forceorforcesareappliedtotheparticlesasa
percentage. Default=1000.0.
A negative Influence value reverses the force
effects.
Note: By default, the influence of the Force space
warps on Par ticle Flow particles is e quivalent to
their influence on the 3ds Max 2 particle systems
PArray, Super Spray, Bli zza rd , a nd PC loud. To
obtain an influence on Particle Flow particles
equivalent to that of the 3ds Max 1 part icle systems
Snow and Spray, set Influence=100.0.
Offset Influence group
Choosethetimeframeforapplyinganimated
parameters. For an explanation, see
Animation
Offset Key ing group (page 2–155)
.
Sync B y—Choose the time frame for applying
animated parameters:
•
Absolute T ime—Any keys set for p arameters are
applied at the actual f rames for w hich they’re
set.
•
Particle Age—Any keys set for par ameters are
applied at the corresponding frames of each
particle’s existence.
•
Event D ura tion—Any keys set for parameters
are applied to each particle starting when it first
enters the event.
Script Wiring rollout
This rollout appears in the parameters panel below
the main operator rollout after you highlight the
operator, right-click it, and then choose Use Script
Wiring. Thereafter, a check mark appears next
to the Use Script Wiring in the right-click menu,
and the rollout appears whenever you highlight
the operator. To turn off script wiring, choose Use
Script Wiring again from the right-click menu.