8
Adding Time Warps 597
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.
Youhavetodothenexttwostepsonlyifthe
weight curve has no nodes, or would lik e 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
setdependsonthetypeofcurveyouwantto
make.Makeasfewnodesaspossibletogetthe
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 tr ack with the track below it on that
frame. The motions are mixed to a g reater or
lesser degree depending on how low you set the
weight curve value for the topmost track.
Adding Ti me War ps
Select a biped. > Motion panel > Biped Apps rollout >
Mixer > Motion Mixer menu bar > Clips > Add Time Warp
Graph Editors menu > Motion Mixer... > Clips > Add Time
Warp
You can cause varying changes in speed
throughout a clip with a time war p. Adding a time
warp to a clip allows you visually to squash and
stretch time over different parts of the clip. You
can use a time warp to:
• Causetheobjecttodosomepartsofthemotion
quickly and others slowly.
• Cause a particular motion within the clip to
occur at a specific time.
You use a time warp by picking a time within the
motion clip and dragging that time’s motion to
another time in t he same clip. The overal l time of
the clip is unchanged, so t he object takes the same
amount of time to do the entire motion, but does
some parts q uickly and others slowly.
Dashed lines appear on a time-warped clip in t he
Mixer to indicate the motion speed at different
points in the clip.
Time warp added to topmost clip.
Warping a clip’s time requires two steps. First
atimewarpmustbeaddedtotheclipwiththe
Clips > Add Time Warp menu option. Then you
turn on Editable Time Warps to see the dashed
lines and adjust the clip’s timing.
Procedures
To prepare to warp a clip’s time:
1.
Open the Motion Mixer, add a biped to the
Mixer,andloadacliponatrack.See
Adding
Tracks to the Mixer (page 2–583)
.
2. Scrub the time slider to find a motion you
would like to occur earlier or later in the clip.
Note the frame number. This frame number is
the
original time
.
3. Scr ub the tim e slider to find the frame on w hich
you would like the motion to occur, and note
the f rame number. This frame number is the
warped time
.