上下左右 键控制人移动

出自Unity3D开发一书，

这个脚本式只是简单的控制人物移动，不是很理想，但是可以学习 通过 上 、下、左、右  按键怎么实现任务的移动

using UnityEngine;using System.Collections;public class MoveByADSW : MonoBehaviour {public const int HERO_UP = 0;public const int HERO_RIGHT = 1;public const int HERO_DOWN = 2;public const int HERO_LEFT = 3;//人物当前行走的方向状态public int state = 0;//人物移动速度public int moveSpeed = 2;//初始化人物位置public void Awake(){state = HERO_UP;}// Use this for initializationvoid Start () {}// Update is called once per framevoid Update () {//获取控制的方向， 上下左右， float KeyVertical = Input.GetAxis("Vertical");float KeyHorizontal = Input.GetAxis("Horizontal");Debug.Log("keyVertical" + KeyVertical);Debug.Log("keyHorizontal" + KeyHorizontal);if(KeyVertical == -1){setHeroState(HERO_DOWN);}else if(KeyVertical == 1){setHeroState(HERO_UP);}if(KeyHorizontal == 1){setHeroState(HERO_RIGHT);}else if(KeyHorizontal == -1){setHeroState(HERO_LEFT);}if(KeyVertical == 0 && KeyHorizontal == 0){animation.Play("idle");}}void setHeroState(int newState){//根据当前人物方向与上一次备份的方向计算出模型旋转的角度int rotateValue = (newState - state) * 90;Vector3 transformValue = new Vector3();//播放行走动画animation.Play("walk");//模型移动的位置数值switch(newState){case HERO_UP:transformValue = Vector3.forward * Time.deltaTime;break;case HERO_DOWN:transformValue = (-Vector3.forward) * Time.deltaTime;break;case HERO_LEFT:transformValue = Vector3.left * Time.deltaTime;break;case HERO_RIGHT:transformValue = (-Vector3.left) * Time.deltaTime;break;}transform.Rotate(Vector3.up, rotateValue);//移动人物transform.Translate(transformValue * moveSpeed, Space.World);state = newState;}}