Forum: SDL hjälp

 
#include <SDL/SDL.h>
#include <iostream>
 
 
using namespace std;
 
void DrawALL();
void Moveball();
void collision();
 
int player1x = 20;
int player1y = 280;
int player2x = 764;
int player2y = 280;
int ballx = 394;
int bally = 294;
int ballspeedx = 3;
int ballspeedy =3;
 
 
SDL_Event poolevent;
SDL_Event event;
SDL_Surface * screen;
SDL_Surface * player1=SDL_LoadBMP("player1.BMP");
SDL_Surface * player2=SDL_LoadBMP("player1.BMP");
SDL_Surface * ball=SDL_LoadBMP("ball.BMP");
 
 
 
void DrawIMG(SDL_Surface *img, int x, int y)
{
  SDL_Rect dest;
  dest.x = x;
  dest.y = y;
  SDL_BlitSurface(img, NULL, screen, &dest);
  SDL_Flip(screen);
}
 
 
 
 
int main( int argc, char *arcv[])
{
        if( SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO) < 0 )
    {
        std::cout<<"ERROR INITILASING SDL!" <<std::endl<<"Reason: "<<SDL_GetError();
        exit(1);
    }
    atexit(SDL_Quit);
    
    screen=SDL_SetVideoMode(800,600,32,SDL_SWSURFACE|SDL_HWPALETTE);
    if(screen == NULL)
    {
        std::cout<<"ERROR SETTING 800x600x32 VIDEO!"<<std::endl<<"Reason: "<<SDL_GetError();
        exit(1);
    }
    
while(1)
    {
        DrawALL();
        Moveball();
        collision();
        
              
        SDL_Event event;
        Uint8* keys;
        
       
          while( SDL_PollEvent(&event) )
          {
              if(event.type == SDL_QUIT) { return 0; } 
             
              if(event.type == SDL_KEYDOWN)
              {
                  if(event.key.keysym.sym==SDLK_ESCAPE) { return 0; }  
              }
          }
          keys = SDL_GetKeyState(NULL);
 
              if ( keys[SDLK_UP] && player1y >= 0 ) 
              { 
                   player1y -= 2; 
                   }
                   if ( keys[SDLK_DOWN] && player1y <= 540 ) 
                   { 
                        player1y += 2; 
                        }
              
             
               
                 
      }                
                 
      }
 
void DrawALL()
{
    DrawIMG(player1, player1x, player1y);
    DrawIMG(player2, player2x, player2y);
    DrawIMG(ball, ballx, bally);
}
void Moveball()
{
    ballx = ballx -  ballspeedx;
    bally = bally - ballspeedy;
    DrawALL();
}
void collision()
{
     if (bally < 0)
     {
               ballspeedy = -3;
               }
               if (bally > 590)
               {
                         ballspeedy = 3;
                         }
                         if (ballx < 0)
                         {
                                   ballspeedx = -3;
                                   }
                                   if (ballx > 790)
                                   {
                                             ballspeedx = 3;
                                             }
                                             if (ballx > player1x && ballx < player1x+16 && bally > player1y && bally < player1y +60)
                                             {
                                                       ballspeedx = -ballspeedx;
                                                       ballspeedy = ballspeedy;
                                                       }
                                                       if (ballx > player2x-16 && ballx < player2x+32 && bally > player2y && bally < player2y+60)
                                                       {
                                                                 ballspeedx = -ballspeedx;
                                                                 ballspeedy = ballspeedy;
                                                                 }
                                             }