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/** Project: S.Ha.R.K.** Coordinators:* Giorgio Buttazzo <giorgio@sssup.it>* Giuseppe Lipari <lipari@sssup.it>* Paolo Gai <pj@gandalf.sssup.it>** Authors :* Kabilan Sukumar <kabbys2@yahoo.com>* Rajenish Kumar jain <rajenish_jain@yahoo.com>* Deepaknath T K <deepaknathtk@yahoo.com>** ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)** http://www.sssup.it* http://retis.sssup.it* http://shark.sssup.it*//** Copyright (C) 2002 Kabilan Sukumar, Rajenish Kumar jain, Deepaknath T K** This program is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation; either version 2 of the License, or* (at your option) any later version.** This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the* GNU General Public License for more details.** You should have received a copy of the GNU General Public License* along with this program; if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA**//*--------------------------------------------------------------*//* THE PING PONG GAME *//*--------------------------------------------------------------*/#include "demo.h"#include <kernel/func.h>#include <stdlib.h>#include <drivers/keyb.h># define R 4 /* the radius of the ball */int ballexit=0;int horizgo; /*when set increases the horizontal speed of the ball*/int vertigo; /*when set increases the horizontal speed of the ball*/int batflagP1=0;int batflagP2=0;KEY_EVT keypressP1;KEY_EVT keypressP2;char points[3];int jump; /*when set makes the bat move faster*/struct ballData{/*Coordinates of centre for ball*/int xcur;int ycur;/*to store the directions of the ball*/int xdir;int ydir;int path_change;}ball;struct batData{/*Coordinates of centre for bat*/int x;int y;int points;}p1,p2;char dir; /*to store the direction of movement of bats*/int gamefinish=0; /* indicates the end of the game *//* to print the score on the screen */void score_increase(char temp[3], int x1, int y1){grx_box(x1+10,y1+2,x1+60,y1+18,black);grx_text(temp,x1+30,y1-4,rgb16(0,200,0),black);}/* the function to take care of the score increase and determining the end of game */void score_keeper(){int i=0;/*ball hits upper boundry*/if( ball.ycur == 23){p1.points = p1.points + 1;itoa(p1.points, points);score_increase(points,435,120);}else if( ball.ycur == 453 )/*If ball hits lower boundry*/{p2.points = p2.points + 1;itoa(p2.points, points);score_increase(points,520,180);}if( p1.points == 5 ){grx_text("!!!!! PLAYER TWO WINS, CONGRATULATIONS !!!!!",20,200,green,black);grx_text("Press ESC to exit to menu",70,250,green,black);gamefinish=1; // indicates that the game is over}if(p2.points== 5){grx_text("!!!!! PLAYER ONE WINS, CONGRATULATIONS !!!!!",20,200,green,black);grx_text("Press ESC to exit to menu",70,250,green,black);gamefinish=1; // indicates that the game is over}}/* The ball thread which keeps tracking the new position of the ball and moves the ball */TASK balls(int i){while(1){/*Delete the ball at previous position*/grx_disc(ball.xcur,ball.ycur,R,black);if(escapeflag||gamefinish)return 0;if( grx_getpixel(ball.xcur-7,ball.ycur) != black ) /*Left hand sensor*/{ball.path_change = 1;ball.xdir = 1;}else if( grx_getpixel(ball.xcur+7,ball.ycur) != black ) /*Right hand sensor*/{ball.path_change = 1;ball.xdir = 0;}if( grx_getpixel(ball.xcur,ball.ycur-8) !=black ) /*Top sensor*/{vertigo = 0;horizgo = 0;ball.path_change = 1;ball.ydir = 1;if((grx_getpixel(ball.xcur,ball.ycur-5) == white ) && ( p2.x - ball.xcur > 20 ) && ( ball.xdir == 1 ) ) if( (grx_getpixel(ball.xcur,ball.ycur-5) == white) && ( p2.x - ball.xcur > 20 ) && ( ball.xdir == 1 ) ){ball.xdir = 0;}else if( (grx_getpixel(ball.xcur,ball.ycur-5) == black) && (abs(p2.x-ball.xcur)<10)){vertigo = 1;}else if( (grx_getpixel(ball.xcur,ball.ycur-5) == white) && ( ball.xcur - p2.x > 20 ) && ( ball.xdir == 0 ) ){ball.xdir = 1;}else if( (grx_getpixel(ball.xcur,ball.ycur-5) == white) && ( p2.x - ball.xcur > 20 ) && ( ball.xdir == 0 ) ){horizgo = 1;}else if( (grx_getpixel(ball.xcur,ball.ycur-5) == white) && ( ball.xcur - p2.x > 20 ) && ( ball.xdir == 1 ) ){horizgo = 1;}}if( grx_getpixel(ball.xcur,ball.ycur+7) !=black ) /*Bottom sensor*/{vertigo = 0;horizgo = 0;ball.path_change = 1;ball.ydir = 0;if( (grx_getpixel(ball.xcur,ball.ycur+5) == white) && ( p1.x - ball.xcur > 20 ) && ( ball.xdir == 1 ) ){ball.xdir = 0;}else if( (grx_getpixel(ball.xcur,ball.ycur+5) == white) && (abs(p1.x-ball.xcur)<10) ){vertigo = 1;}else if( (grx_getpixel(ball.xcur,ball.ycur+5) == white) && ( ball.xcur - p1.x > 20 ) && ( ball.xdir == 0 ) ){ball.xdir = 1;}else if( (grx_getpixel(ball.xcur,ball.ycur+5) == white) && ( p1.x - ball.xcur > 20 ) && ( ball.xdir == 0 ) ){horizgo = 1;}else if( (grx_getpixel(ball.xcur,ball.ycur+5) == white) && ( ball.xcur - p1.x > 20 ) && ( ball.xdir == 1 ) ){horizgo = 1;}}score_keeper(); /* call the score keeper to update the scores *//*calculate the direction of the ball*/if ( (vertigo == 0) && (horizgo == 0) ){if(ball.xdir == 1) ball.xcur=ball.xcur+2; else ball.xcur=ball.xcur-2;if(ball.ydir == 1) ball.ycur=ball.ycur+2; else ball.ycur=ball.ycur-2;}else if (vertigo == 1){if(ball.xdir == 1) ball.xcur=ball.xcur+2; else ball.xcur=ball.xcur-2;if(ball.ydir == 1) ball.ycur=ball.ycur+3; else ball.ycur=ball.ycur-3;}else if (horizgo == 1){if(ball.xdir == 1) ball.xcur=ball.xcur+3; else ball.xcur=ball.xcur-3;if(ball.ydir == 1) ball.ycur=ball.ycur+2; else ball.ycur=ball.ycur-2;}/*draw the ball at new position*/grx_disc(ball.xcur,ball.ycur,R,white);task_endcycle();}}/* called if the escape key is pressed during the game, it sets the flag */void EscapeToMenu(KEY_EVT *k){escapeflag=1;}/* the bat thread for player 1. *//* it controls the movement of the bat by reading the keystrokes of the player */TASK movebatP1(int k){while(1){if(escapeflag||gamefinish){return 0;}if((getKeyFlag()&CNTL_BIT)||getKeyFlag()&SHFL_BIT){/*delete the bat at old position*/grx_box( p1.x-30, p1.y, p1.x+30, p1.y+5,black);if( (getKeyFlag()&CNTL_BIT) && (p1.x > 42) ) /*moves the bat to the left*/{p1.x-=1;}else if( (getKeyFlag()&SHFL_BIT) && (p1.x < 343) ) /*moves the bat to the right*/{p1.x+=1;}/*draw the bat at the new position*/grx_box(p1.x-30, p1.y, p1.x+30, p1.y+5,blue);batflagP1=0;}task_endcycle();}}/* the bat thread for player 2. *//* it controls the movement of the bat by reading the keystrokes of the player */TASK movebatP2(int k){/*delete the bat at old position*/while(1){if(escapeflag||gamefinish){return 0;}if((getKeyFlag()&CNTR_BIT)||(getKeyFlag()&SHFR_BIT)){grx_box( p2.x-30, p2.y, p2.x+30, p2.y+5,black);if( (getKeyFlag()&CNTR_BIT) && (p2.x > 42) ) /*moves the bat to the left*/{p2.x-=1;}else if((getKeyFlag()&SHFR_BIT)&&(p2.x < 343)) /*moves the bat to the right*/{p2.x+=1;}/*draw the bat at the new position*/grx_box( p2.x-30, p2.y, p2.x+30, p2.y+5,yellow);batflagP2=0;}task_endcycle();}}/* the cpu player to be used in single player game*/TASK movebatCPU(){while(1){/*delete the bat at old position*/if(escapeflag||gamefinish){return 0;}grx_box(p2.x-30, p2.y, p2.x+30, p2.y+5,black);if( (ball.xdir == 1) && (p2.x < 345) && (p2.x-ball.xcur < 15) && (ball.ydir == 0) ){p2.x = p2.x + jump;}else if( (ball.xdir == 0) && (p2.x > 45) && (ball.xcur-p2.x < 15) && (ball.ydir == 0) ){p2.x = p2.x - jump;}grx_box(p2.x-30, p2.y, p2.x+30, p2.y+5,yellow);task_endcycle();}}/*Creates a hard task for the player p1*/void hardbatP1(){HARD_TASK_MODEL mp;PID pid;hard_task_default_model(mp);hard_task_def_ctrl_jet(mp);hard_task_def_arg(mp,NULL);hard_task_def_wcet(mp,500);hard_task_def_mit(mp,5000);hard_task_def_usemath(mp);pid= task_create("batEDF1", movebatP1, &mp, NULL);if (pid== NIL) {grx_close();perror("Could not create task <batEDF1>");sys_end();}elsetask_activate(pid);}/*Creates a hard task for the player p2*/void hardbatP2(){HARD_TASK_MODEL mp;PID pid;hard_task_default_model(mp);hard_task_def_ctrl_jet(mp);hard_task_def_arg(mp,NULL);hard_task_def_wcet(mp, 500);hard_task_def_mit(mp, 5000);hard_task_def_usemath(mp);pid = task_create("batEDF2", movebatP2, &mp, NULL);if (pid == NIL) {grx_close();perror("Could not create task <batEDF2>");sys_end();}elsetask_activate(pid);}/*Creates a hard task for the ball*/void hardball(){HARD_TASK_MODEL mp;PID pid;hard_task_default_model(mp);hard_task_def_ctrl_jet(mp);hard_task_def_arg(mp,NULL);hard_task_def_wcet(mp, 500);hard_task_def_mit(mp,PERIOD_BALL);hard_task_def_usemath(mp);pid = task_create("ballEDF", balls, &mp, NULL);if (pid == NIL) {grx_close();perror("Could not create task <ballEDF>");sys_end();}elsetask_activate(pid);}/*Creates a hard task for the cpu bat*/void cpubat(){HARD_TASK_MODEL mp;PID pid;hard_task_default_model(mp);hard_task_def_ctrl_jet(mp);hard_task_def_arg(mp,NULL);hard_task_def_wcet(mp, 500);hard_task_def_mit(mp, 10000);hard_task_def_usemath(mp);pid = task_create("cpuBatEDF1", movebatCPU, &mp, NULL);if (pid == NIL) {grx_close();perror("Could not create task <cpuBatEDF1>");sys_end();}elsetask_activate(pid);}/*--------------------------------------------------------------*//* The Game initializations *//*--------------------------------------------------------------*/void scenario_game(){int i;ball.xcur = 185; /*place ball in the horizontal centre of screen*//*randomly choose the y cordinate of the ballthis makes the game less predictable*/ball.ycur = myrand(400)+30;ball.xdir = myrand(1); /*randomly choose the direction of ball*/ball.path_change = 0;dir = '\0';p1.points = 0; p2.points = 0;jump=2;for(i=0; i<=3; i++){points[i] = '\0';}mutex_lock(&mutex);p1.x = 185; p1.y = 452;p2.x = 185; p2.y = 18;/* This draws the two bats at their initial positions */grx_box(155,452,215,457,blue);grx_box(155,18,215,23,yellow);mutex_unlock(&mutex);ball.xcur=185;ball.ycur=185;mutex_lock(&mutex);grx_disc(ball.xcur, ball.ycur, R, white);mutex_unlock(&mutex);}void init_ball(int choice){KEY_EVT k;hardball();hardbatP1();if(choice==2)hardbatP2();else if(choice==1)cpubat();}/*--------------------------------------------------------------*/