You can edit footstep
timing in Track View.
Footstep keys have their
own display in Track View's Dope Sheet mode. Footstep keys are displayed
as blocks of color, each indicating a period of time when one of
the biped's feet is in a footstep.
Footsteps in Track
The footstep key colors
match the colors of footstep icons in viewports. Just as with footstep
icons, inactive footsteps are brightly colored, while active footsteps
are displayed with pale colors.
The footstep key display
relates directly to the different
leg and foot can be in at any given time. The left edge of each
footstep key indicates the foot is in the Touch state, while the
right edge indicates the Lift state. The duration of the footstep
key between Touch and Lift indicates the time the foot is in the
Plant state. The space between footstep keys indicates a time when
the foot is completely out of a footstep, a Move state.
You can change footstep
timing in Track View by:
- Moving footstep keys to an earlier or
- Moving footstep keys to change the time
relationships between footsteps.
- Changing the lengths of footstep keys.
- Deleting footstep keys.
You must select footstep
keys before you can change their timing.
Selecting Footsteps for
Selecting footstep keys
is the same as selecting footstep icons; when one is selected, the
other is selected as well. Footstep keys can be selected in a number
of ways for editing in Track View.
footsteps, you must have Footstep Mode turned on.
Editing Footstep Timing
Editing the timing of
footsteps is a simple matter of moving selected footsteps or selected
edges in time.
Moving an entire footstep
changes the time at which it starts and ends, but not its duration.
Moving a footstep edge changes the duration of the footstep.
Restrictions on Footstep
The timing for both active
and inactive footsteps can be changed. Editing timing for active
footsteps also changes keys for the center of mass and leg keys,
but not the spine, arm or tail keys. This can cause the resulting animation
to look different from the way you intended. For this reason, you might
prefer to deactivate footsteps before editing timing. See
When editing footstep
timing in Track View, the following limitations apply to both inactive
and active footsteps:
- There must be at least one frame between
footstep keys for the same foot.
- Footstep keys cannot start in negative
- Every footstep must be at least two frames
- If you want to add footstep keys, use
the tools on the Footstep Creation rollout. See
Footsteps Automatically and
- Footsteps cannot be cloned.
- To scale time of footsteps
and body keys together, you can use Scale Time on the Track View
WarningDo not use the Re-scale Time option in the
Time Configuration dialog to scale an animation that contains active
footsteps. If you do so, biped keys might not adapt appropriately.
Instead, use Scale Time on the Track View toolbar.
If you attempt to perform
an illegal footstep timing change in Track View, an error message
appears and the footstep timing pattern returns to the state it
was in before you made edits.
To display footstep keys in Track View:
- Choose Graph Editors menu Track View - Dope Sheet.
- If necessary, expand the Objects listing
to display footstep keys.
To move selected footsteps in time:
- In Track View, drag any selected footstep
key to drag all selected footstep keys in time.
To change the duration of a footstep:
- In Track View, click the left or right
edge of a footstep key.
In addition to a white border, a small white
dot appears to indicate the edge is selected.
- Drag the selected edge to make the footstep
key longer or shorter.
You can adjust a selection of multiple footsteps
You can also adjust any
combination of left edge, right edge, and center selections. Dragging
in Track View adjusts any combination of edge or center selection.
To change the display of numbers of footstep keys:
- In Track View, right-click the footstep
track to display the
Footstep Mode Dialog.
- Choose the values to display from the
Footstep Number Display group.
To scale keys in time:
- On the Track View toolbar, click (Scale Time).
- In the Track View window, click and drag
to indicate the beginning and end of the time period you want to
- Move the cursor over the selection region
until a scale cursor appears. Drag to the left to reduce time, or
drag to the right to increase time.