Unity 3D游戏开发学习笔记（1） 井字棋

第一次用Unity 3D写游戏，做了个井字棋。

由于不熟悉onGUI()和C#，参考了师兄的笔记。

代码实际上很简单，逻辑也简单，主要是通过这个小游戏来熟悉一下Unity 3D的一些基本操作实现，比如OnGUI()的原理，实际上这里面的Button并不是点击触发的效果，而是每一帧都在发生改变，因此这里Button实际上是不断重叠制造的吧。（显然变深色了），我感觉这样的做法不太好，但暂时不知道怎么去更好实现，就先这样了。

using System.Collections;using System.Collections.Generic;using UnityEngine;public class TicTacToe: MonoBehaviour {    int turn = 1;    int [,]state = new int[3,3];    void Start () {        Reset();    }    void Update () { }    void OnGUI() {        if (GUI.Button(new Rect(0,0,150,50), "Start Game")) {            Reset();        }        int current = Check();        if (current == 1) GUI.Label(new Rect(50,55,50,50),"O wins!");        if (current == 2) GUI.Label(new Rect(50,55,50,50),"X wins!");        if (current == 3) GUI.Label(new Rect(50,55,50,50),"Tied!");        for (int i = 0; i < 3; i++) {            for (int j = 0; j < 3; j++) {                if (state[i, j] == 1) {                    GUI.Button(new Rect(0+50*i,80+50*j,50,50), "O");                } else if (state[i, j] == 2) {                    GUI.Button(new Rect(0+50*i,80+50*j,50,50), "X");                }                 if (GUI.Button(new Rect(0+50*i,80+50*j,50,50), "")) {                    if (current == 0) {                        if (turn == 1) state[i, j] = 1;                        if (turn == -1) state[i, j] = 2;                        turn *= -1;                    }                }            }        }    }    int Check() {        for (int i = 0; i < 3; i++) {            if (state[i, 0] == state[i, 1] && state[i, 0] == state[i, 2] && state[i, 0] != 0) {                return state[i, 0];            }        }        for (int j = 0; j < 3; j++) {            if (state[0, j] == state[1, j] && state[2, j] == state[0, j] && state[0, j] != 0) {                return state[0, j];            }        }        if (state[1, 1] != 0 && state[0, 0] == state[1, 1] && state[2, 2] == state[1, 1]) {            return state[1, 1];        }        if (state[1, 1] != 0 && state[0, 2] == state[1, 1] && state[2, 0] == state[1, 1]) {            return state[1, 1];        }        for (int i = 0; i < 3; i++) {            for (int j = 0; j < 3; j++) {                if (state[i, j] == 0) return 0;            }        }        return 3;    }    void Reset() {        turn = 1;        for (int i = 0; i < 3; i++) {            for (int j = 0; j < 3; j++) {                state[i, j] = 0;            }        }    }}