今天主要是学做roll a ball来进行unity的入门学习，了解它的一些简单操作。
首先是1工程的创建，2创建地面和游戏者a ball，注意创建GameObject后对Transform进行reset。3移动控制。代码如下：
public float speed;
void FixedUpdate(){
float moveHorizontal = Input.GetAxis ("Horizontal");
float moveVertical = Input.GetAxis ("Vertical");
Vector3 moveMent = new Vector3 (moveHorizontal, 0.0f, moveVertical);
GetComponent<Rigidbody> ().AddForce (moveMent * speed * Time.deltaTime);
}
两点需要注意：一个是要写在FixeUpdate中，FixeUpdate是基于物理时间的调用，常用于控制运动。一个是注意将代码添加到a ball上后，要对speed进行赋值，这里我用的是500.
还有通过力来控制物体会显得更加真实。
4做围墙。5做摄影机的跟随。代码如下：
public GameObject player;
private Vector3 Offset;
// Use this for initialization
void Start () {
Offset = transform.position - player.transform.position;
}
// Update is called once per frame
void Update () {
}
void LateUpdate(){
transform.position = player.transform.position + Offset;
}
同样代码添加完后，要对player进行赋值。值为小球物体。
6食物的创建，使用预制体方便，注意要reset，再进行食物旋转的代码编写，代码如下：
void Start () {
}
void FixedUpdate(){
transform.Rotate (new Vector3 (15, 30, 45) * Time.deltaTime);
}
注意所有的食物属性的更改都只对预制体操作，还有运动需写在FixedUpdate中。7对预制体设置标签，用于计数。
8创建UI界面，在移动控制代码中添加计分功能，显示出来，还加了一个胜利的判断。
9运行调试，最后导出。
接下来是自己更改后的小球二代。
改进为小球为一定时间间隔内自动生成，且位置为随机的，玩法也有改进，必须按照小球的生成顺序吃，才能吃球，生成小球间隔时间为自己可调节的。附加代码有两部分，一部分是在角色控制中加的判断，另一部分是自己之前写的单链表，因为判断顺序吃球中有用到单链表。代码如下
主角控制代码：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using dataLianbiao;
public class PlayerController : MonoBehaviour {
// Use this for initialization
public float speed;
private int count;
public Text countText;
public int Max;
//
public GameObject Prefab;
private float cubeX;
private float cubeZ;
public float jiange;
private float t1;
private float t2;
TestList<GameObject>obj = new TestList<GameObject>();
void Start(){
t1 = 0.0f;
t2 = 0.0f;
count = 0;
setCountText ();
}
void FixedUpdate(){
float moveHorizontal = Input.GetAxis ("Horizontal");
float moveVertical = Input.GetAxis ("Vertical");
Vector3 moveMent = new Vector3 (moveHorizontal, 0.0f, moveVertical);
GetComponent<Rigidbody> ().AddForce (moveMent * speed * Time.deltaTime);
}
// Update is called once per frame
void Update () {
Produce ();
}
void OnTriggerEnter(Collider other){
if (other.gameObject.tag == "PickUp"&&obj.GetIndex(other.gameObject)==count+1) {
other.gameObject.SetActive (false);
count++;
setCountText ();
}
}
void setCountText(){
if (count < Max) {
countText.text = "Count:" + count;
} else {
countText.text = "You Win!";
}
}
void Produce(){
if (t2-t1 < jiange) {
t2 += Time.deltaTime;
} else {
t1 = t1 + jiange;
t2 += Time.deltaTime;
GameObject cube = (GameObject)Instantiate (Prefab);
obj.Add (cube);
cubeX = Random.Range (-10.0f, 10.0f);
cubeZ = Random.Range (-10.0f, 10.0f);
Vector3 weizhi = new Vector3 (cubeX, 0.5f, cubeZ);
cube.transform.position = weizhi;
}
}
}
单链表代码：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace dataLianbiao{
public interface LianbiaoList<T>{
void Add (T item);
int Count{ get;}
void Clear ();
void Insert (int index, T item);
void RemoveAt (int index);
T GetValue (int indexer);
int GetIndex (T item);
bool IsEmpty ();
}
class Node<T>{
public T Value;
public Node<T>NextNode;
public Node(T value){
Value = value;
NextNode = null;
}
public Node(){
Value = default(T);
}
}
class TestList<T>:LianbiaoList<T>{
private Node<T>head = null;
private int _count = 0;
private int maxSize =100;
public bool IsEmpty(){
return _count > maxSize;
}
public void Add(T item){
if (head == null) {
head = new Node<T> (item);
_count++;
} else {
Node<T> node = head;
while (node.NextNode != null) {
node = node.NextNode;
}
_count++;
node.NextNode = new Node<T> (item);
}
}
public int Count{get{ return _count;}}
public void Clear(){
head = null;
_count = 0;
}
public void Insert(int index,T item){
if (index >= 0 && index < _count) {
Node<T> node = head;
Node<T> prev = null;
Node<T> next = null;
if (index == 0) {
next = head;
head = new Node<T> (item);
head.NextNode = next;
} else {
for (int i = 0; i < index; i++) {
prev = node;
node = node.NextNode;
}
next = node;
node = new Node<T> (item);
node.NextNode = next;
prev.NextNode = node;
}
_count++;
} /*else {
throw new UnityException ("Out of Range!");
}*/
}
public void RemoveAt(int index){
if (index >= 0 && index < _count) {
Node<T> node = head;
Node<T> prev = null;
if (index == 0) {
head = head.NextNode;
} else {
for (int i = 0; i < index; i++) {
prev = node;
node = node.NextNode;
}
prev.NextNode = node.NextNode;
}
_count--;
}
}
public IEnumerator<T> GetEnumerator(){
Node<T> node = head;
Node<T> result = new Node<T> ();
while (node != null) {
result = node;
node = node.NextNode;
yield return result.Value;
}
}
public T GetValue(int index){
if (index >= 0 && index < _count) {
Node<T> node = head;
for (int i = 1; i < index; i++) {
node = node.NextNode;
}
return node.Value;
}
return default(T);
}
public int GetIndex(T item){
Node<T> node = head;
int i = 1;
while (!node.Value.Equals (item) && node.NextNode != null) {
node = node.NextNode;
i++;
}
if (i == _count) {
return -1;
} else {
return i;
}
}
}
}
后面开始尝试UI的学习。