You can adjust the keyframes of the
curve that is created with various types of splines.
Figure 6.51 shows the Incoming Curve types. An
incoming curve is the type of curve that precedes a keyframe. This is an important setting
because not only should you be able to control a curve and motion, but you should
also be able to control what happens before and after a curve. Perhaps you want to have
an object drift a bit before it goes into full motion, or maybe you want to have an item hold
in place before it moves. Setting the Incoming Curve type offers you more flexibility in
how an item behaves for a selected key.
TCB Splines
To add a little more information about the TCB splines, they are easy to set and are useful
for creating realistic motions.As mentioned earlier during the keyframing section, the
values for each spline range from 1.0 to ??“1.0.
A tension value of 1.0 is often the most commonly used TCB spline because it enables an
item to ease in or out of a keyframe. For example, a 3D-animated car needs to accelerate.
Setting it in motion without a custom tension setting (at the default T value of 0) causes
the car to jump from sitting still to moving at a constant rate, without having to speed
up.
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