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808 Chapter 13: reactor
Havok 1 Wor ld/Havok 3 World
Rollout
Utility panel > reactor > Havok 1 World/Havok 3 World
rollout
This rollout lets you set some general parameters
for your simulated world, such as the strength and
directionofgravity,thescaleoftheworld,and
how easily objects can collide with each other.
When Choose Solver is set to Havok 1, the rollout
name is Havok 1 World, and when Choose Solver
is set to Havok 3, the name is Havok 3 World.
Inter face
Theonlydifferencebetweenthetwodifferent
versions of the Havok World rollout is that the
Havok World 3 rollout contains an extra group of
parameters at the end, named Simulation. The
following illustration shows the Havok 3 version
of the rollout.
Grav ity —The acceleration, in world units, the
objectsinascenehaveduetogravity. Itisan
important value because it affects the overall
feeling of scale in a dynamics simulation.
reactor will generate a warning if you specify a
non-standard Gravity value compared to World
Scale (see following); that is, if you set the value
much higher or lower than –9.8 m/s
2
,wherem is
World Scale’s representation of one meter. The