Trajectory Display

When a biped is animated, you can view its motion not only using Biped Playback, but you can also see the path, or trajectory, the biped (or selected biped links) follows throughout the motion.

Display of the trajectory of a biped's lower spine

You turn on trajectory display by clicking Trajectories in either of these user-interface locations:

• Motion panel Biped rollout Expand Biped rollout. Display group (Trajectories)
• Motion panel Key Info rollout (Trajectories)

Tip: Do not use 3ds Max trajectory controls to display or edit biped trajectories. These include the options accessed with Object Properties Display Properties Trajectory on the quad menu, and those under Motion panel Trajectories text button.

Trajectories provide useful visual feedback as you edit keys, showing the effects on the motion path for the parameters you're adjusting. You also can use trajectory display to compare filtered and unfiltered motion capture data.

Changes to Tension, Continuity, Bias, Dynamics Blend, Ballistic Tension, and the overall gravity setting GravAccel are reflected in the trajectories.

Note: Trajectories do not display while you play an animation using In Place mode.

You can customize the trajectory information for the selected biped link by using the Display Preferences dialog. You can choose between Bone Base and Bone Tip, show an entire trajectory, or a moving range of frames.

Procedures

To edit biped trajectory keys in a viewport:

1. Select an animated biped and go to the Motion panel.
2. On the Track Selection rollout, turn on (Body Horizontal) or (Body Vertical).
3. At the bottom of the Biped rollout, expand the Modes And Display sub-rollout if necessary by clicking its name.
4. In the Display group, turn on (Trajectories).
5. Turn on Sub-Object selection level.
6. On the main toolbar, click (Select And Move).
7. Use the Transform gizmo to move the keys on the trajectory.