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4 Right-click on one of the names, and choose Key Selected from the drop
down list that appears.
A key is set for the blend starting point for the aircraft. At frame 30 the
two animation types will begin to blend together.
5 Set the Timeslider to frame 70.
6 In the Channel Box, set the following:
BlendAddDoubleLinear1: 1
BlendMotionPath1: 1
7 Right-click on one of the names, and choose Key Selected from the drop
down list that appears.
A key is set for the blend ending point for the aircraft. At frame 70 the
motion path animation will have full influence.
8 Click play on the Timeslider playback controls to play back the animation.
The two animation types are combined but the motion does not appear
correct. The aircraft rotation flips upward momentarily when it begins
to travel along the motion path.
The interpolation type for the rotations during the blending is not set
correctly.
Setting the pairBlend Rot Interpolation setting to Quaternions changes how
the rotations are interpolated during the blend. In this example, Quaternions
provides a better interpolation type when blending between the keyframe and
motion path animation. For more information see quaternion rotation in the
Maya Help.
222 | Chapter 6 Animation