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the start and end frames of the footstep. The numbers between the colored boxes
represent foot-air duration.
Biped and Track View
The Dope Sheet can be used to create and adjust biped keyframes, edit biped
footsteps, and specify freeform periods. Biped keys display as dots on the
tracks. Footsteps display as squares that can be moved in time. Biped dynamics
and footsteps work together; if footsteps are moved in time, Biped adapts leg
keys and vertical positions to account for the editing. There are a couple of
restrictions: you cant overlap footsteps on the same track, or move footsteps
into negative time.
The Curve Editor can be used to make adjustments to biped keyframe
animation. The Curve Editor is a Track View mode that allows you to work
with motion expressed as function curves on a graph. It lets you visualize the
interpolation of the motion, the object transformations that the software
creates between the keyframes. You can see and control the motion and
animation of the objects in the scene using the keys found on the curves. You
can even draw curves directly on the graph.
Footsteps in Track View - Dope Sheet
By default, left leg footsteps are blue and right leg footsteps are green. Inactive
footsteps are more saturated values of blue and green, active footsteps are pale
blue and green. The left edge of each footstep block indicates when a foot
touches a footstep (Touch State). The right edge of each footstep block indicates
the last frame the foot is on a footstep (Lift State). The space between two
footsteps indicates an airborne state for the foot (Move State). The period
between the Touch and Lift States is the Plant State.
Editing Biped Keys in Track View
Track View is often used to change multiple keys simultaneously. For example,
to change Dynamics Blend for all the vertical centers of mass keys, select all
the vertical keys, display the TCB (Tension, Continuity, and Bias) dialog by
right-clicking over the selected keys and change the Dynamics Blend parameter.
4462 | Chapter 17 character studio