繪製完起始畫面後，玩家就可以開始可以依照畫面指示按下鍵盤來出拳，
所以我們開始接觸輸入控制(鍵盤)的處理，接著也要寫一些人工智慧(演算法)來模擬電腦出拳的部分。
這兩個部分皆是屬於遊戲設計上在程式上的轉換，沒寫過程式的人請多留意一下，大多數的遊戲開發都在這種階段阿 XD
目標: 玩家出拳，鍵盤之輸入處理
可學到的東西: 鍵盤處理
資源
在實際處理鍵盤輸入之前，我們需要全面的思考一下遊戲可能需要紀錄的東西，而在程式上這些資訊大多都使用變數來儲存。
例如玩家與電腦出了什麼拳，結果是贏還是輸，場景需不需要做切換等，都需要先使變數儲存起來，之後程式才能使用這些變數來進行判斷。
int player = 0;
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();
}
// 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;
}
base.Update(gameTime);
}
// 紀錄場景，0=開始畫面，1=出拳畫面
int gameState = 0;
然後同樣在Update()執行階段中，只要偵測到玩家出拳，就要紀錄場景狀態
if (newState.IsKeyDown(Keys.D1) || newState.IsKeyDown(Keys.D2) || newState.IsKeyDown(Keys.D3))
{
gameState = 1;
}
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);
}
}
spriteBatch.End();
base.Draw(gameTime);
}
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;
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");
}
/// <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();
}
// 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;
}
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);
}
}
spriteBatch.End();
base.Draw(gameTime);
}
}
}
iThome鐵人賽
看影片追技術