遊戲的重要核心只剩下最後一步”判斷輸贏”，完成這篇教學，遊戲就算是完成99%了哦!
另外本篇還會再帶入另一種遊戲資源的載入: 中文文字的使用方式。
目標:
可學到的東西: 字型的使用
資源:
判斷輸贏這裡使用的是窮舉法，也就是將每種出拳的組合全部列出來，沒有什麼太難的技巧。
// 紀錄贏家是誰，1是電腦贏，2是玩家贏，999代表平手
int winner = 0;
// 判斷輸贏的函數
void checkWinner()
{
if (player== computer)
{
winner = 999;
}
if (player==1 && computer == 2)
{
winner = 1;
}
if (player == 1 && computer == 3)
{
winner = 2;
}
if (player == 2 && computer == 1)
{
winner = 2;
}
if (player == 2 && computer == 3)
{
winner = 1;
}
if (player == 3 && computer == 1)
{
winner = 1;
}
if (player == 3 && computer == 2)
{
winner = 2;
}
}
// 呼叫判斷轉贏的函數
checkWinner();
上個目標完成了判斷輸贏的部份，但別忘了畫面還沒有任何資訊，玩家還不知道結果如何，這裡將加上結果的文字表示，並且再顯示讓玩家知道自己是左邊還是右邊的人物。
在GuessFingerMoocsContent新增字型資源
在載入遊戲資源中，我們曾在GuessFingerMoocsContent 中加入圖片資源，這裡要使用文字前也是相同的做法。
在右上角方案總管的 GuessFingerMoocsContent 上按下右鍵: 加入 > 新增項目 > 選擇 Visual C# 下的 SpriteFont 再按下新增，成功的話會看到以下畫面
更改字型設定，以便輸出中文
補充! 字型名稱可以直接填入系統有的字型。這裡我們使用標楷體，並調大一點字體。
<FontName>標楷體</FontName>
<Size>40</Size>
<CharacterRegions>
<CharacterRegion><Start> </Start><End>~</End></CharacterRegion>
<CharacterRegion><Start>電</Start><End>電</End></CharacterRegion>
<CharacterRegion><Start>腦</Start><End>腦</End></CharacterRegion>
<CharacterRegion><Start>玩</Start><End>玩</End></CharacterRegion>
<CharacterRegion><Start>家</Start><End>家</End></CharacterRegion>
<CharacterRegion><Start>輸</Start><End>輸</End></CharacterRegion>
<CharacterRegion><Start>贏</Start><End>贏</End></CharacterRegion>
<CharacterRegion><Start>贏</Start><End>贏</End></CharacterRegion>
<CharacterRegion><Start>平</Start><End>平</End></CharacterRegion>
<CharacterRegion><Start>手</Start><End>手</End></CharacterRegion>
</CharacterRegions>
// 宣告字型變數
SpriteFont fontArial;
// 載入字型資源給予字型變數
fontArial = Content.Load<SpriteFont>("SpriteFont1");
// 繪出人物誰是玩家，誰是電腦
spriteBatch.DrawString(fontArial, "電腦", new Vector2(180, 700), Color.White);
spriteBatch.DrawString(fontArial, "玩家", new Vector2(700, 700), Color.Brown);
// 繪出輸贏的結果
if (winner == 999)
{
spriteBatch.DrawString(fontArial, "平手", new Vector2(450, 10), Color.Brown);
}
if (winner == 1)
{
spriteBatch.DrawString(fontArial, "電腦贏", new Vector2(410, 10), Color.Black);
}
if (winner == 2)
{
spriteBatch.DrawString(fontArial, "玩家贏", new Vector2(410, 10), Color.DarkGreen);
}
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
namespace GuessFingerMoocs
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
// 替每張圖片宣告一個變數
Texture2D image1, image2, image3, imageGameStart, imageBackgroud;
// 紀錄玩家出拳，0=初始值，1=剪刀，2=石頭，3=布
int player = 0;
// 紀錄場景，0=開始畫面，1=出拳畫面
int gameState = 0;
// 紀錄電腦出拳，0=初始值，1=剪刀，2=石頭，3=布
int computer = 0;
// 宣告隨機的變數，之後再產生數字
Random random = new Random();
// 記錄玩家的先前的鍵盤動作，之前在Update執行階段已有變數newState取得最新的鍵盤狀態
KeyboardState previousState = Keyboard.GetState();
// 紀錄贏家是誰，1是電腦贏，2是玩家贏，999代表平手
int winner = 0;
// 宣告字型變數
SpriteFont fontArial;
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
// TODO: Add your initialization logic here
// 設定起始畫面大小
graphics.PreferredBackBufferWidth = 1024;
graphics.PreferredBackBufferHeight = 768;
graphics.ApplyChanges();
base.Initialize();
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
// TODO: use this.Content to load your game content here
// 載入變數，並對應每個圖片變數
image1 = Content.Load<Texture2D>("Scissor400x600");
image2 = Content.Load<Texture2D>("Rock400x600");
image3 = Content.Load<Texture2D>("Paper400x600");
imageGameStart = Content.Load<Texture2D>("GameStart1024x768");
imageBackgroud = Content.Load<Texture2D>("background1024x768");
// 載入字型資源給予字型變數
fontArial = Content.Load<SpriteFont>("SpriteFont1");
}
/// <summary>
/// UnloadContent will be called once per game and is the place to unload
/// all content.
/// </summary>
protected override void UnloadContent()
{
// TODO: Unload any non ContentManager content here
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
// TODO: Add your update logic here
// 取得鍵盤按下的狀態
KeyboardState newState = Keyboard.GetState();
// 按下ESC 可以離開遊戲
if (newState.IsKeyDown(Keys.Escape))
{
Exit();
}
// [舊有程式碼]
/*
// 按下數字鍵1，把玩家出拳的變數值修改為1，代表剪刀
if (newState.IsKeyDown(Keys.D1))
{
player = 1;
}
// 按下數字鍵1，把玩家出拳的變數值修改為2，代表石頭
if (newState.IsKeyDown(Keys.D2))
{
player = 2;
}
// 按下數字鍵1，把玩家出拳的變數值修改為3，代表布
if (newState.IsKeyDown(Keys.D3))
{
player = 3;
}
*/
if (newState.IsKeyDown(Keys.D1) || newState.IsKeyDown(Keys.D2) || newState.IsKeyDown(Keys.D3))
{
gameState = 1;
}
/*
// [舊有程式碼] 隨機產生1-3數字
computer = random.Next(1, 4);
*/
// [修正電腦出拳後的程式碼]
// 判斷玩家按下且放開後，才隨機產生一次數字
// 注意! 如果以下判斷式是前後對調 改成 if (previousState.IsKeyUp(Keys.D1) && newState.IsKeyDown(Keys.D1)) 的話，是玩家一按下按鍵電腦就會出拳
if (newState.IsKeyUp(Keys.D1) && previousState.IsKeyDown(Keys.D1))
{
player = 1;
computer = random.Next(1, 4);
}
if (newState.IsKeyUp(Keys.D2) && previousState.IsKeyDown(Keys.D2))
{
player = 2;
computer = random.Next(1, 4);
}
if (newState.IsKeyUp(Keys.D3) && previousState.IsKeyDown(Keys.D3))
{
player = 3;
computer = random.Next(1, 4);
}
// 記得把鍵盤的完成狀態記錄到之前的狀態變數
previousState = newState;
// 呼叫判斷轉贏的函數
checkWinner();
base.Update(gameTime);
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
// TODO: Add your drawing code here
spriteBatch.Begin();
// sprite.draw 的使用方法很多種，這裡載入的只有3個參數
// 參數1表示要顯示的圖片，參數2表示顯示圖片的起始位置，參數3表示填色，White表示不填色
// 原本繪出開始畫面也要更改，只有當還沒出拳時，才會繪製開始畫面
if (gameState == 0)
{
spriteBatch.Draw(imageGameStart, Vector2.Zero, Color.White);
}
if (gameState == 1)
{
// 繪製出拳後的遊戲背景
spriteBatch.Draw(imageBackgroud, Vector2.Zero, Color.White);
// 繪製玩家出拳的貼圖
if (player == 1)
{
spriteBatch.Draw(image1, new Vector2(550,100), Color.White);
}
if (player == 2)
{
spriteBatch.Draw(image2, new Vector2(550, 100), Color.White);
}
if (player == 3)
{
spriteBatch.Draw(image3, new Vector2(550, 100), Color.White);
}
// 繪製電腦出拳的貼圖
if (computer == 1)
{
spriteBatch.Draw(image1, new Vector2(50, 100), Color.White);
}
if (computer == 2)
{
spriteBatch.Draw(image2, new Vector2(50, 100), Color.White);
}
if (computer == 3)
{
spriteBatch.Draw(image3, new Vector2(50, 100), Color.White);
}
// 繪出人物誰是玩家，誰是電腦
spriteBatch.DrawString(fontArial, "電腦", new Vector2(180, 700), Color.White);
spriteBatch.DrawString(fontArial, "玩家", new Vector2(700, 700), Color.Brown);
// 繪出輸贏的結果
if (winner == 999)
{
spriteBatch.DrawString(fontArial, "平手", new Vector2(450, 10), Color.Brown);
}
if (winner == 1)
{
spriteBatch.DrawString(fontArial, "電腦贏", new Vector2(410, 10), Color.Black);
}
if (winner == 2)
{
spriteBatch.DrawString(fontArial, "玩家贏", new Vector2(410, 10), Color.DarkGreen);
}
}
spriteBatch.End();
base.Draw(gameTime);
}
// 判斷輸贏的函數
void checkWinner()
{
if (player== computer)
{
winner = 999;
}
if (player==1 && computer == 2)
{
winner = 1;
}
if (player == 1 && computer == 3)
{
winner = 2;
}
if (player == 2 && computer == 1)
{
winner = 2;
}
if (player == 2 && computer == 3)
{
winner = 1;
}
if (player == 3 && computer == 1)
{
winner = 1;
}
if (player == 3 && computer == 2)
{
winner = 2;
}
}
}
}
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