Unity 射击练习（1）

using UnityEngine;
using System.Collections;

[AddComponentMenu("Camera-Control/MouseLook")]
public class MouseLook : MonoBehaviour {
	
	//枚举角色目标位置
	public enum RotationAxes {MouseXAndY = 0,MouseX = 1,MouseY = 2}
	
	
	public RotationAxes axes = RotationAxes.MouseXAndY;
	float rotationY = 0F;
	//鼠标准心
	public Texture2D tex_fire;
	

	void Start ()
	{
		//取消默认鼠标图标	
		Screen.showCursor = false;
		
		if(rigidbody)
			rigidbody.freezeRotation = true;
	}
	
	// Update is called once per frame
	void Update () 
	{
		//计算摄像头的旋转
		if(axes == RotationAxes.MouseX)
		{
			//旋转角色
			transform.Rotate(0,Input.GetAxis("Mouse X"),0);
		}
		else
		{
			//设置角色欧拉角
			transform.localEulerAngles = new Vector3(-rotationY,transform.localEulerAngles.y,0);
			
		}
	}
	
	void OnGUI()
	{
		if(tex_fire)
		{
			//绘制鼠标准心
			float x = Input.mousePosition.x - (tex_fire.width>>1);
			float y = Input.mousePosition.y + (tex_fire.height>>1);
			GUI.DrawTexture(new Rect(x,Screen.height - y,tex_fire.width,tex_fire.height),tex_fire);
			
		}
	}
}