2010

Table Of Contents
11 Click play on the Time Sliders playback control to play back the
animation.
The motion of the aircraft is not smooth as it travels along the path. It
initially moves forwards and backwards a bit at the beginning and end
of the path. This indicates that some adjustment of the animation is
required. You adjust the animation using the Graph Editor.
To view the Graph Editor
1 From the main menu, select Window > Animation Editors > Graph Editor.
The Graph Editor appears.
2 In the Graph Editor, select View > Frame All.
The Graph Editor updates to display the animation curve for the motion
path animation.
The shape of the animation curve provides some clues as to why the motion
of the aircraft is not smooth. Between frames 60 and 84 the curve rises and
then drops slightly. Because the animation curve represents translation along
the curve, a drop in the curve indicates that the object travels backwards. A
similar occurrence happens at the end of the curve as well. To correct this,
you need to modify the tangents for the keys in the Graph Editor.
To edit the tangents for the keys in the Graph Editor
1 In the Graph Editor, press the shift key, then double click on the
animation curve to select the four keys (frames 60, 120, 180 & 240)
2 In the Graph Editor menu, select Tangents > Linear.
Changing the timing of an object along a motion path | 227