unity3d 最新动画系统 可以随意 组合技能吗

http://forum.unity3d.com/threads/mecanim-control.224315/ 可以解决运行时动画替换。
具体来说就是RuntimeAnimatorController myController = animator.runtimeAnimatorController;
AnimatorOverrideController myOverrideController = new AnimatorOverrideController();
myOverrideController.runtimeAnimatorController = myController;
myOverrideController["run"] = myRunFasterClip;
// Put this line at the end because when you assign a controller on an Animator, unity rebind all the animated properties
animator.runtimeAnimatorController = myOverrideController;

运行时动态改变状态机
http://forum.unity3d.com/threads/create-mecanim-states-and-transitions-by-script.188544/
具体来说就是使用 UnityEditorInternal.StateMachine stateMachine;
5.x可以使用，4.5应该也可以使用，没有亲测。