Track Selection Rollout

Select the Biped > Motion panel > Track Selection rollout

Use the controls on the Track Selection rollout to select one of the three center of mass tracks for editing and to select biped limbs.

Procedures

To locate vertical center of mass keys

  1. On the Track Selection rollout, click Body Vertical.

  2. Use the Next and Previous Key buttons on the Key Info rollout to jump to the next or previous center of mass Body Vertical keyframes.

    Tip: If the selected vertical COM key is a touchdown key from an airborne period, you can change the Ballistic Tension parameter on the Key Info rollout to control knee bend. Turn on Trajectories on the Display rollout to view how changing parameters affects the trajectory.

To use Symmetrical Tracks

  1. Select any limb on the biped.

  2. On the Track Selection rollout, click Symmetrical Tracks.

    The selected biped limbs remain selected, opposite limbs are selected also.

To use Opposite Tracks

  1. Select a limb or limbs on the biped.

  2. On the Track Selection rollout, click Opposite Tracks.

    Selected biped limbs are deselected; opposite biped limbs are selected.

To set a Body Vertical key

  1. On the Track Selection rollout click Body Vertical.

  2. Turn on the Animate button.

  3. Click Select and Move on the 3DS MAX toolbar.

  4. Click and drag the center of mass up or down in the viewports.

    The biped is repositioned vertically, a key is created in the center of mass Body Vertical track.

To set a Body Horizontal key

  1. On the Track Selection rollout, click Body Horizontal.

  2. Turn on the Animate button.

  3. Click Select and Move on the 3DS MAX toolbar.

  4. Click and drag the center of mass laterally in the viewports.

    The biped is then positioned laterally, a key is created in the center of mass Horizontal track.

To set a Body Rotation key

  1. On the Track Selection rollout, click Body Rotation Track.

  2. Turn on the Animate button.

  3. Click Select and Rotate on the 3DS MAX toolbar.

  4. Select an Axis to rotate around.

  5. Click and drag the center of mass.

    The biped then rotates around the selected axis, a key is created in the center of mass Body Rotation track.

Interface

Body Track Tools (Center of Mass Tracks)

Biped's center of mass (COM) object is the root of the biped hierarchy, and uses three animation tracks to position and rotate the biped: They are Horizontal, Vertical, and Rotation. The Horizontal and Vertical tracks also contain Biped Dynamics parameters.

Using these tools, select and edit one of the three center of mass tracks. Open the Key Info rollout to view Biped Dynamics parameters and to adjust Tension, Continuity, and Bias for the selected Body track.

Tip: Turn on Trajectories to view the way a parameter change affects the animation.

Note: Tension, Continuity, and Bias only affect the Center Of Mass Body Vertical keys if the value of Dynamics Blend is less than 1. To turn gravity off at a vertical center of mass key, set the value of Dynamics Blend to 0.

Body Horizontal: Selects the center of mass to edit horizontal biped motion.

Displays Balance Factor parameters on the Key Info rollout, and can be animated.

Body Vertical: Selects the center of mass to edit vertical biped motion.

It displays Dynamics Blend and Ballistic Tension Parameters on the Key Info rollout. These can be animated. Ballistic Tension is only available at keys just before or just after an airborne state, as between footsteps in a run or jump.

Body Rotation: Selects the center of mass to edit biped rotational motion.

Symmetrical Tracks: Selects the matching object on the other side of the biped. For example, if the right arm is selected, clicking Symmetrical Tracks selects the left arm too. You can then make changes to both sides of the body at once. Symmetrical Tracks works for single and multiple biped objects.

Opposite Tracks: Selects the matching object on the other side of the biped, and deselects the current object. For example, if the right arm is selected, clicking Opposite Tracks selects the left arm. Opposite Tracks can be used for single or multiple objects.

 

 

 


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