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1222 Chapter 14: character studio
and Particles & D ynamics categories to crowd
members.
In particular, use the Space Warp behavior to
tie delegates to a Ve c tor F ield s p a c e w ar p ( p a g e
2–1241), so that they avoid penetrating a n
irregularly shaped object while following its
contours.
Inter face
None (label)—Click this button, then select a space
warp object.
Co lor Swatch— shows the color u sed to draw the
Space Warp force vector during the solution. Click
the box to choose a different color.
Display Force—When on, force exerted on the
delegate(s) by the Space Warp behavior is drawn
in the viewports as a vector during the simulation
solution.
Speed Vary Behavior
Create panel > Helpers > Object Type rollout > Crowd >
Setup rollout > New button > Speed Vary Behavior
Select a Crowd object. > Modi fy panel > Setup rollout >
New button > Speed Vary Be havior
The Speed Vary b ehavior is usef ul for objects
whose velocity changes at random as they move,
such as sightseeing tourists. Its para meters let you
specify how often a delegate should change speed,
what speed range it should look at for a new speed,
and how long it should accelerat e to get to that
new speed.
Interfa ce
Time group
Per iod—Specifies how many frames should elapse
before a new speed is chosen.
Devia tion—Specifies the maximum amount by
which Period should vary.
Each time a period ends, character studio takes a
random number between the negative and positive
values of the Deviation setting, multiplies it by
the Period setting, and adds the result to Period.
Default=0.5. Range=0.0 to 1.0.
Speed group
The mathematical formula for the new speed
is as follows: new speed = (delegate’s Average
Speed*Center)*(1 + RN*C enter Dev iation), where
RN is a random number between -1 and 1.
Center—Specifies the speed the delegate should
change to. Center is a multiplier: A value of 0.0
means to stop , a value of 1.0 means to move at its
average speed,andavaluegreaterthan1.0means
to move faster than its average speed. Default=1.0.
Range=0.0 to 99,999.0.