2009

the motion on the track below it. For example, if you set the weight curve for
two tracks in a trackgroup to 0.5, the two clips will be mixed equally.
Several tracks can be stacked in a trackgroup with varying weight curves on
each one. For each frame in the animation, the Motion Mixer evaluates the
curve on the topmost track. If its weight curve is less than 1.0 at that frame,
the Mixer evaluates the next track down, and so forth. The Motion Mixer adds
up the weight curve values until the sum reaches 1.0, and disregards tracks
below that point.
For Transition tracks, one weight curve is used for the entire track. On Layer
tracks, weight curves are set individually for each clip.
Procedures
To adjust a weight curve:
1 Open the Mixer, add a biped to the Mixer, and create two tracks for a
trackgroup. See
Filtering Mixer Tracks on page 3715.
2 Place different motion clips on the tracks.
3
For the topmost track in the trackgroup, click Weight Mode to the
right of the track display.
The weight curve turns red to indicate it can be edited.
You have to do the next two steps only if the weight curve has no nodes,
or would like to create more nodes.
4 Move the cursor over the line until a small arrow appears. Click to set a
node.
5 Move the cursor and click to set more nodes on the weight curve.
TIP On a transition track, you would ordinarily set a node at each end of the
track, and at intervals in between. The number of nodes you set depends on
the type of curve you want to make. Make as few nodes as possible to get
the curve required for your animation.
6 Move the cursor over an existing node until a cross cursor appears.
7 Click and drag to move the selected node downward.
The Motion Mixer mixes the motions from the topmost track with the
track below it on that frame. The motions are mixed to a greater or lesser
degree depending on how low you set the weight curve value for the
topmost track.
3732 | Chapter 15 Animation