9

806 Chapter 13: reactor
important, it lets you switch between the Havok
1 and Havok 3 engines.
The utility is divided into a number of rollouts.
For more information, follow the links. More
information about the two different Havok
versions is available later in this topic, in
Differences between Havok 1 and Havok 3 (page
2–806).
• About: Choose Havok 1 or Havok 3 solver
• Prev iew and Animation (page 2–806)
• Havok 1 World/Havok 3 World (page 2–808)
• Collisions (page 2–810)
• Display (page 2–812)
• Utils (page 2–813)
• Properties (page 2–815)
Dif fer ences between H avok 1 a nd H avok
3
You can use either of two different dynamics
solvers in reactor: Havok 1 or Havok 3. To switch
between them, choose the desired solver from the
drop-down list on the About rollout. The active
solver is saved with the scene file.
Thedifferencebetweenthetwo,inanutshell,
is that Havok 1 provides a broader range of
functionality, but Havok 3 is faster and more
accurate. If your simulation requires only r igid
bod ies, you’ll gen erally get better results with
Havok 3.
Followingisamoredetailedlistofdifferences:
Fea t u r e
Havok 1 Havok 3
Simulation Discrete only
Discrete or
Continuous with
extra parameters
Supported bodies Rigid/Cloth/Soft/
Rope/Deforming
Mesh/Water
Rigid only
Rigid Body
Properties (page
2–717)
Standard Standard +
Shell/Penetration/
Quality
Cooperative
Constraints
> Breakable
Constraints (page
2–735)
Linear, Angular Threshold
Cooperative
Constraints >
Strength settings
(page 2–735)
Strength, Tau Strength only
Preview Window:
display
Textures,
smoothing, actual
geometry
Simulation
geometr y only
Preview Window:
interaction during
preview
right-button drag
hold
Spacebar
and move mouse
Toy C ar ( p ag e
2–766)
Standard Additional
parameters
Note: If you preview a simulation or create an
animation using Havo k 3 and the scene con tains
non-supportedentitiessuchassoftbodies,reactor
simply ig nores these entities and excludes them
from the simulation.
Preview & Animation R ollout
Utility panel > reactor > Preview & Animation rollout
This rollout lets you run and preview your reactor
simulation,aswellasspecifyingtimingparameters
for the simulation.