hoge.cs

using UnityEngine;
using System.Collections;
using UniRx;

public class SkillInput : MonoBehaviour {

	public enum SkillType {
		Normal,
		Charge,
		None
	}

	private Animator animator;
	// Use this for initialization
	void Start () {
		animator = GetComponent<Animator>();

		Observable.EveryUpdate()
			.Select(_ => GetInputType())
			.Where(skill => skill != SkillType.None)
				.Subscribe(skill => UpdateAction(skill));
	}

	private SkillType GetInputType()
	{
		if(Input.GetKeyDown(KeyCode.Z))
			return SkillType.Normal;
		else if(Input.GetKeyDown(KeyCode.X))
			return SkillType.Charge;

		return SkillType.None;
	}

	private void UpdateAction(SkillType skill)
	{
		switch(skill){
		case SkillType.Normal:
			animator.SetTrigger("Normal");
			break;
		case SkillType.Charge:
			animator.SetTrigger("Charge");
			break;
		}
	}
}