Unity官方实例教程 Roll-a-Ball

与unity的transform组件相处的挺久了，最近项目不太忙，决定好好打下unity的基础。那么从Roll-a-Ball这个简单游戏开始吧！1.先创建一个球体游戏对象，改名为Player，transform值y=0.5，加上刚体组件，具体如下图：其中脚本PlayerController.cs代码如下：

using UnityEngine;
using UnityEngine.UI;

public class PlayerController : MonoBehaviour
{

public float speed;
public Text countText;
private float count;

// Use this for initialization
void Start ()
{
count = 0;
setCountText();
}

// Update is called once per frame
void FixedUpdate ()
{

float moveH = Input.GetAxis("Horizontal");
float moveV = Input.GetAxis("Vertical");
Vector3 move = new Vector3(moveH,0.0f,moveV);
GetComponent<Rigidbody>().AddForce(move * speed * Time.deltaTime);

}

void OnTriggerEnter(Collider other)
{
Debug.Log("碰撞");
if (other.gameObject.tag == "PickUp")
{
other.gameObject.SetActive(false);
count++;
setCountText();
}
}

private void setCountText()
{
countText.text = "Count:" + count;
}
}

2.创建一个平面，改名为Ground，具体如下图：3.摄像机，让相机简单跟随游戏对象，为Main Camera挂一个脚本CameraController,代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraController : MonoBehaviour
{

public GameObject player;

private Vector3 offset;

// Use this for initialization
void Start ()
{
offset = transform.position;
}

// Update is called once per frame
void LateUpdate ()
{
transform.position = offset + player.transform.position;
}
}

4.创建被抓取的立方体，通过预制体来做，先创建一个立方体，transform中rotation三个值都设为45，挂上脚本Rotator，代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Rotator : MonoBehaviour {

// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
transform.Rotate(new Vector3(15,30,45) * Time.deltaTime);
}
}

然后将这个cube拖到Assets下面预制体文件夹中，再通过这个预制体来创建多个。6.再简单的添加一个计分板，create-UI-Text,并拖拽到Player的countText参数下，调整合适位置

Ground加墙什么的可以自由发挥，都比较简单。。。

比较重要的是理解Rigidbody，Collider,Is Trigger这三个东西，具体看这个总结：http://blog.csdn.net/monzart7an/article/details/22739421