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848 Chapter 14: Character Studio
Parametric describes the p arameter in terms of
biped anatomy, and Actual describes the va lue in
3ds Max units.
Stride Width=1 and Stride Width=3
Actual Str ide Width—Setsthestridewidth
inmodelingunits. Changestothissetting
automatically change the Parametric Stride Width.
Timing
Auto Ti ming—Sets timing parameters
automatically.
Auto Timing affec ts the following t iming
parameters for the Run gait:
•Runfootstep,Airborne
When Auto Timing is selected, these parameters
are automatically adjusted to reasonable values.
You cont rol the footstep sequence by adjusting
the Stride L ength and Time to Next Footstep
parameters.
When Auto Timing is off, you c an control the
footstep sequence by adjusting the gait timing
parameters, but you can’t change the Time to
Next Footstep parameter .
Interpolate—Control acceleration or deceleration
of the series of footsteps. When this box is selected,
a second set of step parameters under Last Step
is enabled.
Biped creates the footsteps st arting with the values
of the parameters under First Step and ending with
the values of the parameters under Last Step.
By interpolating between the two, Biped produces
a footstep series that changes over time.
When Interp olate is cleared, the Last Step
parameters are grayed out. Biped creates all the
footsteps using only the parameters under First
Step.
Sta r t Af t er La st Footstep—Appends the newly
created footsteps to the end of the existing footstep
sequence.
Start at Current Frame—Inserts the newly created
footsteps at the current frame after the existing
footstep sequence allowing you to make a gap in
time before the footsteps start again.
First Step and Last Step
Param et r i c S t ri d e Leng th —Sets the stride length for
the new footsteps as a percentage of the length of
thebiped’sleg.Thedefaultvalueof0.75givesan
averagestrideofnormalproportions.
A value of 1.0 will produce a stride length equal
to the leg length, which makes the biped stretch
slightly to reach the next step. A value of 0.0 wi ll
makethebipedruninplace. Anegativestride
length will make the biped run backwards.
When a biped r uns backwards, it does not simply
reverse the forward movement but maintains the
correctfoot-statesequencewiththetoetouching
the ground first, followed by the heel.
AdjustingParametricStrideLengthautomatically
changes the value for A ctual Stride Length.
Stride Length=0.75 and Stride Length=1