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768 Chapter 13: reactor
Inter face
Toy Car Proper ties rollout
Chassis—Displaysthenameoftherigidbodythat
serves as the chassis. You assign the chassis object
by clicking this button and then selecting a rigid
body from any viewport.
Wheels —Lists the names of the toy car’s wheels.
Pick —Lets you add a wheel to the car. C lick this
button, and then in the viewport position t he
cursor over the object you would like to use as a
wheel. If the object can b e used as a rigid b o dy, the
cursor changes from an arrow to a cross and you
can select the object to add it to the toy c ar.
Add—Letsyouaddoneormorerigidbodiesfrom
the scene to ac t as wheels for the toy car. Click the
button to open the Select Car Wheels dia lo g. Make
a selection in the provided list, then add the wheels
to the car by clicking the Select button.
Delete—Lets you remove wheels from the car.
Highlight the wheels to remove from the car in the
Wheels list and then click this button.
Note: Thefollowingfourparametersareavailable
with Havok 1 only. W ith Havok 3, use the Havok 3
Wheel Params rollout (page 2–769) settings instead.
Angula r Str ength—The st rength of the corrective
forces applied to keep the wheels upright and
pointing for ward.
Linear Str ength—The strength of the forces applied
to keep the wheels in position relative to the
chassis.
Suspension—Thesuspensionstrengthforthecar.
Thelowerthevalue,themorethechassisbounces
when forces are applied to it.
Inter nal Su bsteps—Allows the car to be simulated
usingmoresubstepsperkeyframethantherest
of the simulation.
Increasing the Internal Substeps value can be
useful if you are simulating a car with unusual
parameters, which might require more substeps
for stability.
Toy Car Orientation group
Choose how reactor orients the bodies in relation
to the spin and suspension axes.