簡易2D角色控制

KeyboardEventListener

using UnityEngine;
using System.Collections;

public class KeyboardEventListener : MonoBehaviour {
	public delegate void KeyboardHandler(int dir);  

	public event KeyboardHandler onHorizontalMove;
	public event KeyboardHandler onVerticalMove;
	
	private KeyCode m_LeftArrowKey = KeyCode.LeftArrow;
	private KeyCode m_RightArrowKey = KeyCode.RightArrow;
	private KeyCode m_UpArrowKey = KeyCode.UpArrow;
	private KeyCode m_DownArrowKey = KeyCode.DownArrow;
	
	void Update () {
		// Press Right
		if (Input.GetKeyDown (m_RightArrowKey)){
			OnHorizontalMove(1);
		}
		if (Input.GetKeyUp (m_RightArrowKey)){
			if (Input.GetKey (m_LeftArrowKey)){
				OnHorizontalMove(-1);
			}else{
				OnHorizontalMove(0);
			}
		}

		// PressLeft
		if (Input.GetKeyDown (m_LeftArrowKey)){
			if (Input.GetKey (m_RightArrowKey)){
				OnHorizontalMove(1);
			}else{
				OnHorizontalMove(-1);
			}
		}
		if (Input.GetKeyUp (m_LeftArrowKey)){
			if (Input.GetKey (m_RightArrowKey)){
				OnHorizontalMove(1);
			}else{
				OnHorizontalMove(0);
			}
		}


		// Press Up
		if (Input.GetKeyDown (m_UpArrowKey)){
			OnVerticalMove(1);
		}
		if (Input.GetKeyUp (m_UpArrowKey)){
			if (Input.GetKey (m_DownArrowKey)){
				OnVerticalMove(-1);
			}else{
				OnVerticalMove(0);
			}
		}
		
		// PressDown
		if (Input.GetKeyDown (m_DownArrowKey)){
			if (Input.GetKey (m_UpArrowKey)){
				OnVerticalMove(1);
			}else{
				OnVerticalMove(-1);
			}
		}
		if (Input.GetKeyUp (m_DownArrowKey)){
			if (Input.GetKey (m_UpArrowKey)){
				OnVerticalMove(1);
			}else{
				OnVerticalMove(0);
			}
		}

	}
	void OnHorizontalMove(int dir)
	{
		if (onHorizontalMove != null){
			onHorizontalMove (dir);  
		}
	}
	void OnVerticalMove(int dir)
	{
		if (onVerticalMove != null){
			onVerticalMove (dir);  
		}
	}
	static public KeyboardEventListener Get (GameObject go)
	{
		KeyboardEventListener listener = go.GetComponent<KeyboardEventListener>();
		if (listener == null) listener = go.AddComponent<KeyboardEventListener>();
		return listener;
	}
}

PlayerInput

using UnityEngine;
using System.Collections;

public class PlayerInput : MonoBehaviour {
	private KeyboardEventListener m_KeyboardListener;  
	private PlayerMovement m_PlayerMovement;
	
	void Awake(){
		m_PlayerMovement = GetComponent<PlayerMovement>();
		ListenerKeyboard();
	}
	
	void ListenerKeyboard(){
		m_KeyboardListener = GetComponent<KeyboardEventListener>();
		if (m_KeyboardListener != null && m_PlayerMovement != null){
			m_KeyboardListener.GetComponent<KeyboardEventListener>().onHorizontalMove += CharacterHorizontalMovement;
			m_KeyboardListener.GetComponent<KeyboardEventListener>().onVerticalMove += CharacterVerticalMovement;
		}
	}
	void CharacterHorizontalMovement(int theDir){
		m_PlayerMovement.moveDir.x = (float)theDir;
		m_PlayerMovement.SetDir(theDir);
	}
	void CharacterVerticalMovement(int theDir){
		m_PlayerMovement.moveDir.y = (float)theDir;
		m_PlayerMovement.SetDir(theDir);
	}
}

PlayerMovement

using UnityEngine;
using System.Collections;

public class PlayerMovement : MonoBehaviour {
	public float moveSpeed = 1.0f;
	public Vector2 moveDir;
	public bool faceRight = true;
	// Update is called once per frame
	void Update () {
		this.GetComponent<Rigidbody2D>().velocity = moveDir * moveSpeed*20/1  * Time.deltaTime;
	}
	public void SetDir(float theDir){
		if (theDir > 0 && !faceRight){
			FlipDir();
		}else if (theDir < 0 && faceRight){
			FlipDir();
		}
	}
	void FlipDir(){
		faceRight = !faceRight;
		this.transform.localScale = new Vector3(-this.transform.localScale.x, this.transform.localScale.y, this.transform.localScale.z);
	}
}