sdlframe.cpp

游戏开发数据结构Data Structures for Game Programmers

// ============================================================================
// Data Structures For Game Programmers
// Ron Penton
// SDLFrame.cpp
// This is a basic SDL Framework that I've set up for use with the game demos
// I've used in the book.
// ============================================================================
#include "SDL.h"


// ============================================================================
//  Global Constants
// ============================================================================
const char PROGRAM_NAME[]   = "INSERT PROGRAM NAME HERE";
const int WIDTH             = 640;
const int HEIGHT            = 480;


// ============================================================================
//  Global Variables
// ============================================================================

// this is the main window for the framework
SDL_Surface* g_window = 0;



int main( int argc, char* argv[] )
{
    // declare coordinates.
    int x, y;

    // declare event holder
    SDL_Event event;

    // initialize the video system.
    SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER );
    SDL_WM_SetCaption( PROGRAM_NAME, 0); 

    // set our at exit function
    atexit( SDL_Quit );

    // set the video mode.
    g_window = SDL_SetVideoMode( WIDTH, HEIGHT, 0, SDL_ANYFORMAT );

    while( 1 )
    {
        //look for an event
        if( SDL_PollEvent( &event ) )
        {
            //an event was found
            if( event.type == SDL_QUIT ) 
                break;
            if( event.type == SDL_MOUSEBUTTONDOWN ) 
            {
                // get the mouse state.
                SDL_GetMouseState( &x, &y );
            }
            if( event.type == SDL_MOUSEBUTTONUP ) 
            {
                // get the mouse state.
                SDL_GetMouseState( &x, &y );
            }
            if( event.type == SDL_KEYDOWN )
            {
                // a key was pressed.
                if( event.key.keysym.sym == SDLK_ESCAPE )
                {
                    // if ESC was pressed, quit the program.
                    SDL_Event quit;
                    quit.type = SDL_QUIT;
                    SDL_PushEvent( &quit );
                }
            }
        }   // end event loop.


        // do all game-related stuff here.

        // update the entire window.
        SDL_UpdateRect( g_window, 0, 0, 0, 0 );
    }
  
    // do game cleanup here
    // done
    return 0;
}