Create Multiple Footsteps Dialog: Run
 
 
 
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Select the Biped Motion Panel Biped rollout (Footstep Mode) Footstep Creation rollout (Run) (Create Multiple Footsteps) Create Multiple Footsteps: Run dialog

The Create Multiple Footsteps dialog for the run gait allows you to create a sequence of running footsteps by setting a series of parameters. This dialog will display when Run is selected on the Footstep Creation rollout first, and then Create Multiple Footsteps is clicked.

Interface

Start Left

Starts the footstep sequence with a left step.

Start Right

Starts the footstep sequence with a right step.

Alternate

Turn on to alternate between right and left footsteps. When this box is cleared, all of the footsteps will be either right or left, producing the effect of a hopping run on one foot.

Number of Footsteps

Determines the number of new footsteps to be created.

Parametric Stride Width

Sets the stride width as a percentage of the pelvis width.

A value of 1.0 produces a stride width equal to the pelvis width. A value of 3.0 produces a wide, waddling stride. Changes to this setting automatically change the Actual Stride Width.

Parametric describes the parameter in terms of biped anatomy, and Actual describes the value in 3ds Max Design units.

Stride Width=1 and Stride Width=3

Actual Stride Width

Sets the stride width in modeling units. Changes to this setting automatically change the Parametric Stride Width.

Timing

Auto Timing

Sets timing parameters automatically.

Auto Timing affects the following timing parameters for the Run gait:

  • Run footstep, Airborne

    When Auto Timing is selected, these parameters are automatically adjusted to reasonable values. You control the footstep sequence by adjusting the Stride Length and Time to Next Footstep parameters.

    When Auto Timing is off, you can 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 starting 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 Interpolate is cleared, the Last Step parameters are grayed out. Biped creates all the footsteps using only the parameters under First Step.

Start After Last 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

Parametric Stride Length

Sets the stride length for the new footsteps as a percentage of the length of the biped’s leg. The default value of 1.5 gives a typical running stride.

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 will make the biped run in place. A negative stride length will make the biped run backwards.

When a biped runs backwards, it does not simply reverse the forward movement but maintains the correct foot-state sequence with the toe touching the ground first, followed by the heel.

Adjusting Parametric Stride Length automatically changes the value for Actual Stride Length.

Stride Length=0.75 and Stride Length=1

Actual Stride Length

Sets the stride length for the new footsteps in 3ds Max Design units.

The same rules apply as for Parametric Stride Length (described above).

Adjusting Actual Stride Length automatically changes the value for Parametric Stride Length.

Stride Height=5 units

Actual Stride Height

Sets the rise or fall between footsteps. You can use this parameter to create a set of footsteps going up or down a slope or a stairway.

The value for Actual Stride Height is the difference in height in units between each of the new footsteps. Positive values step up and negative values step down.

Time to Next Footstep

Specifies the number of frames in each foot movement cycle. A cycle starts with the frame in which a biped foot touches the ground, continues as the foot lifts and moves, and ends with the frame before the foot touches the ground again. This parameter is only enabled if Auto Timing is on.

Speed

Displays the number of units the biped will move per frame. It changes in response to changes in the other parameters but cannot be adjusted directly.

The following two parameters are only enabled when Auto Timing is off. You can use these parameters instead of Auto Timing to control the speed of the forward motion over the series of footsteps.

Run Footstep

Specifies the number of frames each footstep will be on the ground during the run.

The higher the number, the longer the biped foot remains in contact with the ground and, consequently, the slower the speed of the running motion.

Footsteps 2 and 3 are on the ground for 5 frames each

Airborne

Specifies the number of frames the body will be in the air between footsteps.

The higher the number, the longer the biped hangs in the air for each step and, consequently, the slower the speed of the running motion.