Pong Clone Collision Allegro

This is a discussion on Pong Clone Collision Allegro within the C++ Programming forums, part of the General Programming Boards category; Hi I've been learning some 'Allegro' (a game programming library) for c++. i decided to compile what i'd learned and ...

  1. #1
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    Sep 2007
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    Pong Clone Collision Allegro

    Hi

    I've been learning some 'Allegro' (a game programming library) for c++. i decided to compile what i'd learned and to try and make a pong clone called 'bat and ball'. ive run into a problem that i have been un-able to fix. when i run this code everything works as it should but the colision on the bat to ball doesn't work. please help:

    Code:
    #include <allegro.h>
    #include <cstdlib>
    
    int BallX = 100;
    int BallY = 100;
    
    int TempX = 100;
    int TempY = 100;
    
    int Dir = 1; //This will keep track of the circles direction
                //1= up and left, 2 = down and left, 3 = up and right, 4 = down and right
    
    int PlayerX = 300;
    int PlayerY = 400;            
    
    int TempPlayerX = 300;
    int TempPlayerY = 400;
    
    void MovePlayer(){
         
         TempPlayerX = PlayerX;
         TempPlayerY = PlayerY;
         
         if (key[KEY_LEFT] && PlayerX > 10) {
                           PlayerX = PlayerX - 5;
                            }
         else if (key[KEY_RIGHT] && PlayerX < 570) {
                                 PlayerX = PlayerX + 5;
                                 }
         acquire_screen();
         rectfill( screen, TempPlayerX, TempPlayerY, (TempPlayerX + 50), (TempPlayerY + 20), makecol ( 0, 0, 0));
         rectfill( screen, PlayerX, PlayerY, (PlayerX + 50), (PlayerY + 20), makecol ( 255, 255, 255));
         release_screen();
         
         }                        
         
    
    
    void MoveBall(){
    
        TempX = BallX;
        TempY = BallY;
        
        if (Dir == 1 && BallX != 10 && BallY != 20 && (BallX < PlayerX || BallX > PlayerX + 50)) {
         
            BallX = BallX - 1;
            BallY = BallY - 1;
                  
        } else if (Dir == 2 && BallX != 20 && BallY != 460) {
    
            BallX = BallX - 1;
            BallY = BallY + 1;
    
        } else if (Dir == 3 && BallX != 620 && BallY != 20)  { 
        
            BallX = BallX + 1;
            BallY = BallY - 1;
    
        } else if (Dir == 4 && BallX != 620 && BallY != 460) {
    
            BallX = BallX + 1;
            BallY = BallY + 1;
           
        } else if ((BallX > PlayerX || BallX < (PlayerX + 50)) && BallY == 395) { 
    
            BallY = BallY - 5;
            Dir = rand() % 4 + 1;
            
        }
        
        else {
        Dir = rand() % 4 + 1;
    }     
                 
        
        acquire_screen();
        circlefill ( screen, TempX, TempY, 5, makecol( 0, 0, 0));
        circlefill ( screen, BallX, BallY, 5, makecol( 255, 255, 255));
        release_screen();
        
        rest(10);
    
    }    
    
    int main(){
    
        allegro_init();
        install_keyboard();
        set_color_depth(16);
        set_gfx_mode( GFX_AUTODETECT, 640, 480, 0, 0);
        
        while( !key[KEY_ESC]){
         
            MoveBall();
            MovePlayer();
       
        }    
        
        return 0;
    
    }
    END_OF_MAIN();

  2. #2
    and the hat of int overfl Salem's Avatar
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    Same thing here Allegro Pong Collision Problems
    Please don't start multiple threads on the same topic.
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