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302 Chapter 12: Animation
To add a k ey to a trajectory :
1.
Select an object.
2. Display t he trajectory by following the previous
steps.
3. In the Motion panel, click Trajectories.
4. Click Sub-Object to activate Keys and enable
editing.
5. Click Add Key.
The button highlights.
6. Click the tr ajectory.
Wherever you click the trajectory a key will be
added.
7. Right-clickthekeyandselectKeyInfofromthe
right-click menu.
In the Key Info dialog, you can change the In
and Out values for the in-betweens on either
sideofthekey. Thisallowsyoutousethe
trajectory key to create the illusion of hesitation
or accelera tion.
Yo u c a n c l i c k r e p e a t e d l y t o a d d m a n y k e y s i n
this mode.
Todeleteakeyfromatrajectory:
1.
Select a key on a trajectory. You can click it, or
use window selection.
2. Be sure Add Key is turned off in the Trajectories
rollout of the Motion panel.
3. Click Delete Key in the Trajectories rollout of
the Motion panel.
The key is deleted.
To tr ansform k eys on a tra jector y:
1.
Select one or more objects.
2. On the Motion panel, click Trajectories.
3. Click Sub-Object to activate Keys and enable
editing.
4. Select one or more keys and use the transform
tools on the Main toolbar to move, rotate, or
scale the selected keys.
Interfa ce
Sub-Object—Enables key editing. Use the Move,
Rotate, and Scale transforms to change the location
of a key(s) displayed on a trajectory.
Trajec tories rollout
Delete K ey —Deletes the selected key(s) f rom the
trajectory.
Add K ey —Adds key(s) to the tr ajectory. This is a
modeless tool. When you click this button once,
you can then add any number of keys by clicking
the trajectory line in the viewport one or more
times in succession. To exit Add Key mo de, click
the button again.
Sample Range group
Star t Time/End T ime—Specifies the interval for the
conversion. If you’re converting from position
keyframestoasplineobject,thisisthetime
intervalforwhichthetrajectorywillbesampled.If
you’re conv erting from a spline object to position
keys,thisistheintervaloverwhichthenewkeys
will be placed.