系列二：窗体出世

系列一完成后，总想跃跃欲试地看到怎么出现一个窗体

1.窗体的第一个版本

MainGame.h

 1 #pragma once
 2 #include <SDL/SDL.h>
 3 #include <GL/glew.h>
 4 
 5 class MainGame
 6 {
 7 public:
 8     MainGame();
 9     ~MainGame();
10 
11     void run();
12     void initSystems();
13 
14 private:
15     SDL_Window* m_pWindow;
16     int m_nScreenWidth;
17     int m_nScreenHeight;
18 };
View Code
MainGame.cpp

 1 #include "MainGame.h"
 2 
 3 
 4 MainGame::MainGame() :m_pWindow(nullptr), m_nScreenWidth(1024), m_nScreenHeight(768)
 5 {
 6 
 7 }
 8 
 9 
10 MainGame::~MainGame()
11 {
12 }
13 
14 void MainGame::run()
15 {
16     initSystems();
17 }
18 
19 void MainGame::initSystems()
20 {
21     //Initialize SDL
22     SDL_Init(SDL_INIT_EVERYTHING);
23     m_pWindow = SDL_CreateWindow("GraphicToturial", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, m_nScreenWidth, m_nScreenHeight, SDL_WINDOW_OPENGL);
24 }
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2.第一个窗体的版本仅仅是一个无法控制的版本，让咱们加点元素给他，让他能够控制

这里用到了SDL_PollEvent 

当事件为SDL_QUIT：可以退出程序， 为SDL_MOUSEMOTION：可以捕捉鼠标移动的坐标

MainGame.h

 1 #pragma once
 2 #include <SDL/SDL.h>
 3 #include <GL/glew.h>
 4 
 5 enum class GameState{PLAY, EXIT};
 6 
 7 class MainGame
 8 {
 9 public:
10     MainGame();
11     ~MainGame();
12 
13     void run();
14     
15 
16 private:
17     void initSystems();
18     void gameLoop();
19     void processInput();
20 
21     SDL_Window* m_pWindow;
22     int m_nScreenWidth;
23     int m_nScreenHeight;
24     GameState m_gameState;
25 };
View Code

 

 

MainGame.cpp

 1 #pragma once
 2 #include <SDL/SDL.h>
 3 #include <GL/glew.h>
 4 
 5 enum class GameState{PLAY, EXIT};
 6 
 7 class MainGame
 8 {
 9 public:
10     MainGame();
11     ~MainGame();
12 
13     void run();
14     
15 
16 private:
17     void initSystems();
18     void gameLoop();
19     void processInput();
20 
21     SDL_Window* m_pWindow;
22     int m_nScreenWidth;
23     int m_nScreenHeight;
24     GameState m_gameState;
25 };
View Code

 

posted @ 2020-04-16 11:24  unicornsir  阅读(157)  评论(0)    收藏  举报