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344 Chapter 12: Animation
can change the sphere’s position using the
React ion Manager’s editing tools.
13. On the Reaction Manager dialog, click the
Sphere01 / Position entry to highlight it, if
necessary, and then click the Edit Mode button.
14. Positionthesphereat(0,0,100).
The position updates in the Sphere01 / Posit ion
line under State02. Also, the Reaction Manager
gr aph shows the change in values of the slave’s
(sphere) X and Z position values as the master
box’s X position changes. On the graph, as in
Track View, red=X, g reen=Y, and blue=Z.
15. Click the Edit Mode button again to t urn it off,
andthenscrubthetimeslider.
As the box moves between f rames 0 and 50,
thesphererisestothepositionspecifiedinthe
second st ate.
For the third and final state, you’ll have the slave
move in a different direction over the second
half of the master’s motion.
16. Go to frame 100, and then create a new state.
17. In the States list, click the new state or its slave
track to highlig ht it.
18. Turn on Edit Mode. Position the sphere at
(0,–100,100), and then turn off Edit Mode.
19. Scrub the time slider b etween f rames 0 and 100.
Over the first 50 f rames, the sphere moves
between the first two states, and over the
second half of the animation, the sphere moves
between the second and third states.
To conclude the procedure, you’ll demonstrate
that the sphere is responding only to the box’s
X position, regardless of animation.
20. Go to fr ame 0. Select the box, and then press
andholdtheALTkeyandright-clickthebox.
This opens the Animation quad menu.
21. From the Set (lower-right) quadrant, choose
Delete Selected Animation.
This command deletes all animation keys for
the current selection.
22. Nowmovetheboxinallthreedimensions.
Any change in the Y or Z position has no
effect on the sphere. However, moving the box
between -100 and 100 on the X axis, no matter
what the Y or Z position, results in changing the
sphere’s position as specified in the Reaction
controller.
ThisproceduregivesyouahintoftheReaction
controller’s power. You can find another
procedure showing additional aspects of the
Reaction Manager in:
Example: To use the
Reaction Manager dialog: (page 2–345)
.