Unity3D为FirstPersonController添加跑步与下蹲动作

using UnityEngine;
using System.Collections;

public class MyController : MonoBehaviour {

    ;
    ;
    ;

    private CharacterMotor motor;
    private float dist;//distance to ground

    // Use this for initialization
    void Start () {
        motor = GetComponent<CharacterMotor>();
        CharacterController ch = GetComponent<CharacterController>();
        dist = ch.height / ;
    }

    void FixedUpdate()
    {
        float vScale = 1.0f;
        float speed = walkSpeed;
        if ((Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift)) && 　　　　　　　Input.GetKey(KeyCode.W))
        {
            speed = runSpeed;
        }

        if (Input.GetKey(KeyCode.C))
        {
            vScale = 0.5f;
            speed = crouchSpeed;
        }

        motor.movement.maxForwardSpeed = speed;//set max speed
        float ultScale = transform.localScale.y;//crouch stand up smoothly

        Vector3 tmpScale = transform.localScale;
        Vector3 tmpPosition = transform.position;

        tmpScale.y = Mathf.Lerp(transform.localScale.y, vScale,  * Time.deltaTime);
        transform.localScale = tmpScale;

        tmpPosition.y += dist * (transform.localScale.y - ultScale);//fix vertical position
        transform.position = tmpPosition;
    }

}

本文转自其它网站。添加了First Person Controller后，直接挂上代码即可实现跑步与下蹲。下面是相应的JavaScript代码：

var walkSpeed: float = 7; // regular speed
var crchSpeed: float = 3; // crouching speed
var runSpeed: float = 20; // run speed

private var chMotor: CharacterMotor;
private var ch: CharacterController;
private var tr: Transform;
private var height: float; // initial height

function Start(){
    chMotor = GetComponent(CharacterMotor);
    tr = transform;
    ch = GetComponent(CharacterController);
    height = ch.height;
}

function Update(){

    var h = height;
    var speed = walkSpeed;

    if (ch.isGrounded && Input.GetKey("left shift") || Input.GetKey("right shift")){
        speed = runSpeed;
    }
    if (Input.GetKey("c")){ // press C to crouch
        h = 0.5 * height;
        speed = crchSpeed; // slow down when crouching
    }
    chMotor.movement.maxForwardSpeed = speed; // set max speed
    var lastHeight = ch.height; // crouch/stand up smoothly
    ch.height = Mathf.Lerp(ch.height, h, 5*Time.deltaTime);
    tr.position.y += (ch.height-lastHeight)/2; // fix vertical position
}