/****************************PONG******************************* * Project Name: Pong * * Author: Sheraz Mahmood * * Purpose: To show beginners how to write pong. Intended as a * * first game for beginners to write. * * Notes: This game uses the Allegro library. * * 1997 (c) Sheraz Mahmood * **************************************************************/ #include #include #include /*Include the pong header file for the finding things in the datafile*/ #include "pong.h" /*Direction consts*/ #define DOWN_RIGHT 0 #define UP_RIGHT 1 #define DOWN_LEFT 2 #define UP_LEFT 3 /*Get the Pong DataFile*/ DATAFILE *pong_datafile=NULL; /*Game variables*/ int bar1_y=30; //Player 1 Bar position int bar2_y=430; //Player 2 Bar position int ball_x; //The location of the Ball int ball_y; //The location of the Ball int direction=0; //The direction the Ball is going int score_p1=0; //Player 1 score int score_p2=0; //Plater 2 score BITMAP *buffer; //The screen buffer of double buffering int speed=2; //The speed of the Ball int amout_of_hits=0; //Used to set the speed of the Ball int up_ran_speed=0; //Random speed /******************************************************** *NAME:Boing * *PURPOSE:To play the sound file when the ball is hit * *INPUT: N/A * *RETURN: N/A * *******************************************************/ void boing(void) { play_sample(pong_datafile[pong_boing].dat,255,255,1000,0); return; } /******************************************************** *NAME:Random Direction * *PURPOSE:To send back a random direction for the ball * *INPUT: N/A * *RETURN: An int for the direction * *******************************************************/ int random_direction(void) { up_ran_speed=random()%3; return random()%3; } /******************************************************** *NAME:Move Ball * *PURPOSE:To Move the ball and to bounce the ball * *INPUT: N/A * *RETURN: N/A * *******************************************************/ void move_ball(void) { /*Set the speed according to the amout of hits*/ if(amout_of_hits%10==0 && amout_of_hits!=0) { speed++; amout_of_hits++; } /*Respond to the direction the ball is traviling*/ switch(direction) { case DOWN_RIGHT: ball_x+=speed+up_ran_speed; ball_y+=speed; if(ball_x>600) { if((ball_y>=bar2_y-40) &&( ball_y<=bar2_y+65)) { direction=DOWN_LEFT; amout_of_hits++; boing(); } else { score_p1++; ball_x=SCREEN_W/2; ball_y=35; direction=random_direction(); } } else { if(ball_y>420) direction=UP_RIGHT; } break; case UP_LEFT: ball_x-=speed; ball_y-=speed+up_ran_speed; if(ball_x<5) { if((ball_y>=bar1_y-40) &&( ball_y<=bar1_y+65)) { direction=UP_RIGHT; amout_of_hits++; boing(); } else { direction=random_direction(); score_p2++; ball_x=SCREEN_W/2; ball_y=35; } } else { if(ball_y<30) direction=DOWN_LEFT; } break; case UP_RIGHT: ball_x+=speed+up_ran_speed; ball_y-=speed; if(ball_x>600) { if((ball_y>=bar2_y-40) &&( ball_y<=bar2_y+65)) { direction=UP_LEFT; amout_of_hits++; boing(); } else { score_p1++; ball_x=SCREEN_W/2; ball_y=35; direction=random_direction(); } } else if(ball_y<30) direction=DOWN_RIGHT; break; case DOWN_LEFT: ball_x-=speed; ball_y+=speed+up_ran_speed; if(ball_x<5) { if((ball_y>=bar1_y-40) &&( ball_y<=bar1_y+65)) { direction=DOWN_RIGHT; amout_of_hits++; boing(); } else { score_p2++; ball_x=SCREEN_W/2; ball_y=35; direction=random_direction(); } } else { if(ball_y>420) direction=UP_LEFT; } } /*Display the ball*/ draw_rle_sprite(buffer,pong_datafile[pong_ball].dat,ball_x,ball_y); return; } /******************************************************** *NAME:Key Respond * *PURPOSE:To respond to the input from the users * *INPUT: N/A * *RETURN: N/A * *******************************************************/ void key_respond(void) { /*Update the joystick*/ poll_joystick(); /*Respond to the input*/ if(key[KEY_DOWN]) bar1_y+=6+up_ran_speed; if(key[KEY_UP]) bar1_y-=6+up_ran_speed; if(bar1_y<=30) bar1_y=30; if(bar1_y>430) bar1_y=430; if(joy_down || key[KEY_Z]) bar2_y+=6+up_ran_speed; if(joy_up || key[KEY_A]) bar2_y-=6+up_ran_speed; if(bar2_y<=30) bar2_y=30; if(bar2_y>430) bar2_y=430; /*Display the bars on the screen*/ draw_rle_sprite(buffer,pong_datafile[pong_bar].dat,0,bar1_y); draw_rle_sprite(buffer,pong_datafile[pong_bar].dat,635,bar2_y); return; } /******************************************************** *NAME:Play Game * *PURPOSE:To Control the acctual the game * *INPUT: N/A * *RETURN: N/A * *******************************************************/ void pong_game(void) { /*Set the first random direction the ball will be traviling*/ direction=random_direction(); /*Play the game while the ESC key is not pressed*/ while(!key[KEY_ESC]) { /*Move the Ball*/ move_ball(); /*Respond to the input*/ key_respond(); /*Put the information on the Screen*/ textout(buffer,pong_datafile[pong_text].dat,"Player 1 Score:",150,0,254); textout(buffer,pong_datafile[pong_text].dat,itoa(score_p1,NULL,10),text_length(pong_datafile[pong_text].dat,"Player 1 Score:")+150,0,10); textout(buffer,pong_datafile[pong_text].dat,"Player 2 Score:",350,0,254); textout(buffer,pong_datafile[pong_text].dat,itoa(score_p2,NULL,10),text_length(pong_datafile[pong_text].dat,"Player 2 Score:")+350,0,10); textout(buffer,pong_datafile[pong_text].dat,"keyboard",0,0,255); textout(buffer,pong_datafile[pong_text].dat,"joystick",640-text_length(pong_datafile[pong_text].dat,"joystick"),0,255); /*Draw a line to set the boundries*/ line(buffer,0,30,640,30,10); /*Put the buffer screen on the screen*/ blit(buffer,screen,0,0,0,0,640,480); /*Clear the buffer*/ clear(buffer); } return; } int main(void) { /*Init Allegro equipment*/ allegro_init(); /*Install the timer*/ install_timer(); /*Install the keyboard*/ install_keyboard(); /*Initizlise the joystick*/ initialise_joystick(); /*Install the mouse*/ install_mouse(); if((pong_datafile=load_datafile("pong.dat"))==NULL) { /*Shutdown Allegro*/ allegro_exit(); /*Print error message*/ printf("Error loading \"pong.dat\"\n%s\n\n", allegro_error); exit(1); } /*Set the sound system*/ printf("Setting up the Sound."); if(install_sound(DIGI_AUTODETECT,MIDI_AUTODETECT,NULL) != 0) { /*Shutdown Allegro*/ allegro_exit(); /*Print error message*/ printf("Error setting up Sound\n%s\n\n", allegro_error); // exit(1); } /*Set the graphice mode*/ printf("Setting up graphics mode 640x480.\n"); if (set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0) != 0) { /*Shutdown Allegro*/ allegro_exit(); /*Print error message*/ printf("Error setting graphics mode\n%s\n\n", allegro_error); exit(1); } /*Set the pallete for the sprites*/ set_pallete(pong_datafile[pong_pal].dat); /*Clear and Create the buffer*/ buffer=create_bitmap(640,480); clear(buffer); /*Set the Ball position*/ ball_x=SCREEN_W/2; ball_y=35; /*Play the Game*/ pong_game(); /*Shut down Allegro*/ allegro_exit(); /*Output the information*/ if(score_p1>score_p2) printf("Player 1 beat Player 2\n"); else printf("Player 2 beat Player 1\n"); return; }