thcha There is no example of an implementation of an 8-directional character in the example scenes of the spine-unity runtime, but you can see how to handle the skeleton's animation using the Animator Controller in Spine Examples/ Other Examples/StateMachine SkeletonAnimation/Mecanim Logic SkeletonAnimation View
.
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This scene and the example scripts that are used in the scene should be very helpful to you. (The example scripts are attached to the Hero
GameObject.)