角色移动控制

简单的角色移动，使用CharacterController控制器，参加如下代码

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public float speed = 6.0F;
	public float jumpSpeed = 8.0F;
	public float gravity = 20.0F;
	private Vector3 moveDirection = Vector3.zero;
	void Update() {
		CharacterController controller = GetComponent<CharacterController>();
		if (controller.isGrounded) {
			moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
			moveDirection = transform.TransformDirection(moveDirection);
			moveDirection *= speed;
			if (Input.GetButton("Jump"))
				moveDirection.y = jumpSpeed;

		}
		moveDirection.y -= gravity * Time.deltaTime;
		controller.Move(moveDirection * Time.deltaTime);
	}
}// This script moves the character controller forward 
// and sideways based on the arrow keys.
//这个脚本用箭头键向前移动和侧移角色控制器。
// It also jumps when pressing space.
//当按下空格键时，它跳起。
// Make sure to attach a character controller to the same game object.
//确保把一个character controller组件附加到同一个游戏物体上。
//It is recommended that you make only one call to Move or SimpleMove per frame.
//建议你每帧只调用一次Move或者SimpleMove。 

var speed : float = 6.0;
var jumpSpeed : float = 8.0;
var gravity : float = 20.0;

private var moveDirection : Vector3 = Vector3.zero;

function Update() {
   var controller : CharacterController = GetComponent(CharacterController);
   if (controller.isGrounded) {
	 // We are grounded, so recalculate
	 // move direction directly from axes
	 //我们着地了，所以直接通过轴重新计算move direction。
	 moveDirection = Vector3(Input.GetAxis("Horizontal"), 0,Input.GetAxis("Vertical"));
	 moveDirection = transform.TransformDirection(moveDirection);
	 moveDirection *= speed;     

     if (Input.GetButton ("Jump")) {
			moveDirection.y = jumpSpeed;
		}
   }
   // Apply gravity
   //应用重力。
   moveDirection.y -= gravity * Time.deltaTime; 
   // Move the controller
   //移动控制器。
   controller.Move(moveDirection * Time.deltaTime);
}

【注意】

1、如果想让角色控制器推开其他刚体或者对象，你可以在对象附加的脚本中添加OnControllerColliderHit()函数，这样对它们施加力就能够产生碰撞。

2、另外，如果你想让你的游戏角色被物理效果影响，那就最好使用刚体而不是角色控制器。

3、如果发现你的角色频繁被卡住，尝试调整SkinWidth值，实践中比较好的值是至少要大于0.01并且大于Radius的10%。

4、transform.TransformDirection();获取此对象的世界坐标方向，使它朝着自身的某一方向移动// and sideways based on thearrow keys.