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# Pong in ASCII

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### #1whereiswez  Members   -  Reputation: 122

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Posted 03 July 2001 - 05:10 AM

Hello yet again .. Using C++ Command Line ? .. and only conio.h and iostream.h .. it should be possible to write Pong in ASCII right ? kay .. in pascal there was something we used like (if not keypressed) do such .. how would i do that in c++ ? .. so that the ball bounces all over, while receiving keystrokes or not ? i am trying to keep the libraries to a minium tho, coz the more there are the more complexed it seems to get concerning repetitive definitions which it doesnt seem to like .. thanx

### #2 Anonymous Poster_Anonymous Poster_*   Guests   -  Reputation:

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Posted 03 July 2001 - 10:48 AM

Yup you can do pong with iostream.h and conio.h
I recall for text-based games, compilers like DJGPP and Borland work best. Here it is:

char KeyPressed;
if ( kbhit () )
KeyPressed = getch();

kbhit() checks the keyboard buffer if there is a button press waiting to be handled. getch() takes that and puts it into a char variable. kbhit () returns 1 (true) if the user hit a key, and 0 if the user didn''t (before getch() was last called).

Good luck!

### #3whereiswez  Members   -  Reputation: 122

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Posted 06 July 2001 - 06:21 AM

THANKS ! btw ! :D

>

!!! ---> K ! .. I'm stuck again !

BC++ Command Line, NO TASM MASM OR ASM .. though ..

I have looked about for posts on multiple key down handling ..
I'm not too sure on how they work, and also the posts I've read concern Direct this and that, which I'm not using ..

Can somebody give me a bit more than a hint on how to make the game so that :

Player 1 (left paddle) can continuously move up, while player 2 (right paddle) continuously moves up, without any player letting go of the "UP" keys ?

Also .. ASCII GFX wise, whats the better way to work out the whole collision, deflection thing ? ..

I've got mine to work (The whole if hit top center or low, and from direction, then reverse direction if this and that), but I think possibly if I could substitute actual calculated formulas, the game would be a bit more realistic. (Then again, I'm working ASCII *LOL*) .. I'm more after the concept, and equations ..

And YES .. my maths is lost and further more a bit off but the PONG game I've written so far doesn't use hectic maths but works, probably slower yes, but i'd like to make it work better.

If anyone needs to see my messy bit of code to try and figure out what I mean about it working, but not as well as I'd like it to, here it is :

  /* to do : two players .. need simultaneous keypress function computer ai if ball goes to extent, then set score, regame ! prod menu system scoring system ? .. ball speed / game speed? add formulas for curve balls ! random flying things to collect, exp pad, speed ball, slow ball, bigger ball ?*/#include #include #include #include struct myballpos{ int x; int y;} ballpos;struct mypaddle{ int x; int y; int ex;} lpad;struct mypaddle rpad;void wait (int msec){ clock_t endwait; endwait = clock () + (msec * CLK_TCK/1000); while (clock() < endwait) {}};void drawball(int x, int y, int maskoff){ gotoxy(x,y); switch (maskoff) { case 0 : cout << " "; break; default : cout << "*"; };};void drawpad(int x, int y, int ex, int maskoff){ for (int i=y-ex;i<=y+ex;i++) { gotoxy(x,i); switch (maskoff) { case 0 : cout << " "; break; default : cout << "H"; }; };};int main(){ srand(time(NULL)); char ch; int gamespeed = 50; int ai = 1; int strchmax = 5; int strch = rand() % strchmax; int strchc = strch; int endgame = 0; int l2r = rand() % 1; // from left to right int b2t = rand() % 1; // from bottom to top/* init ball , l pad, r pad positions*/ ballpos.x = 40; ballpos.y = 12; lpad.x = 15; lpad.y = 12; lpad.ex = 3; rpad.x = 65; rpad.y = 12; rpad.ex = 3; clrscr();/* begin the game loop ! :D*/ while (endgame==0) {/* if AI enabled then GAME ON WOOHOO ! :D*/ if (ai == 1) { drawpad(rpad.x, rpad.y, rpad.ex, 0); if ((ballpos.y > rpad.ex) && (ballpos.y <= 24-rpad.ex)) rpad.y = ballpos.y; }; drawpad(lpad.x, lpad.y, lpad.ex, 1); drawpad(rpad.x, rpad.y, rpad.ex, 1);/* check which keys are pressed, affect the assigned objects movement check extents of pad movement*/ if (kbhit()) { ch = getch(); switch (ch) { case '' : { endgame = 1; }; break; case '+' : { if (gamespeed > 0) gamespeed = gamespeed -1; }; break; case '-' : { if (gamespeed < 50) gamespeed = gamespeed +1; }; break; case 's' : { if (lpad.y-lpad.ex > 1) { drawpad(lpad.x, lpad.y, lpad.ex, 0); lpad.y = lpad.y-1; drawpad(lpad.x, lpad.y, lpad.ex, 1); }; }; break; case 'x' : { if (lpad.y+lpad.ex < 24) { drawpad(lpad.x, lpad.y, lpad.ex, 0); lpad.y = lpad.y+1; drawpad(lpad.x, lpad.y, lpad.ex, 1); }; }; break; case '5' : { if (rpad.y-rpad.ex > 1) { drawpad(rpad.x, rpad.y, rpad.ex, 0); rpad.y = rpad.y-1; drawpad(rpad.x, rpad.y, rpad.ex, 1); }; }; break; case '2' : { if (rpad.y+rpad.ex < 24) { drawpad(rpad.x, rpad.y, rpad.ex, 0); rpad.y = rpad.y+1; drawpad(rpad.x, rpad.y, rpad.ex, 1); }; }; break; }; }; drawball(ballpos.x,ballpos.y,0);/* check the stretch of the ball distance to follow check the distance the ball has followed to the stretch check the direction of the ball from top to bottom or reversed reverse the direction*/ if (strchc > 0) { strchc = strchc -1; } else if ((strchc == 0) && (strch != 0)) { strchc = strch; if (ballpos.y < 2) { b2t = 0; } else if (ballpos.y > 23) { b2t = 1; }; switch (b2t) { case 0 : ballpos.y = ballpos.y +1; break; case 1 : ballpos.y = ballpos.y -1; break; }; };/* check if the ball reaches boundary limits change direction from left to right reverse the direction*/ if (ballpos.x > 79) { l2r = 0; } else if (ballpos.x < 2) { l2r = 1; }/* check if ball hits LEFT paddle ! :D*/ if ((ballpos.x == lpad.x) && (ballpos.y > lpad.y-lpad.ex-1) && (ballpos.y < lpad.y+lpad.ex+1)) { l2r = 1;// if hit TOP if ( ballpos.y < (lpad.y-lpad.ex) + (((lpad.ex*2)+1)/3) ) {// if going DOWN if (b2t == 0) { if ((strch <= strchmax) && (strch > 1)) strch = strch -1; else if (strch < 1) strch = strchmax; } else// if going UP if (b2t == 1) { if ((strch < strchmax) && (strch >= 1)) { strch = strch +1; b2t = 0; } else if ((strch == strchmax) || (strch == 0)) { if (strch == 0) strch = strchmax; b2t = 0; }; }; } else// if hit BOTTOM if ( ballpos.y > (lpad.y+lpad.ex) - (((lpad.ex*2)+1)/3) ) {// if going DOWN if (b2t == 0) { if ((strch < strchmax) && (strch >= 1)) { strch = strch +1; b2t = 1; } else if ((strch == strchmax) || (strch == 0)) { if (strch == 0) strch = strchmax; b2t = 1; }; } else// if going UP if (b2t == 1) { if ((strch < strchmax) && (strch > 1)) strch = strch -1; else if (strch < 1) strch = strchmax; } }; };/* check if ball hits RIGHT paddle ! :D*/ if ((ballpos.x == rpad.x) && (ballpos.y > rpad.y-rpad.ex-1) && (ballpos.y < rpad.y+rpad.ex+1)) { l2r = 0;// if hit TOP if ( ballpos.y < (rpad.y-rpad.ex) + (((rpad.ex*2)+1)/3) ) {// if going DOWN if (b2t == 0) { if ((strch <= strchmax) && (strch > 1)) strch = strch -1; else if (strch < 1) strch = strchmax; } else// if going UP if (b2t == 1) { if ((strch < strchmax) && (strch >= 1)) { strch = strch +1; b2t = 0; } else if ((strch == strchmax) || (strch == 0)) { if (strch == 0) strch = strchmax; b2t = 0; }; }; } else// if hit BOTTOM if ( ballpos.y > (rpad.y+rpad.ex) - (((rpad.ex*2)+1)/3) ) {// if going DOWN if (b2t == 0) { if ((strch < strchmax) && (strch >= 1)) { strch = strch +1; b2t = 1; } else if ((strch == strchmax) || (strch == 0)) { if (strch == 0) strch = strchmax; b2t = 1; }; } else// if going UP if (b2t == 1) { if ((strch < strchmax) && (strch > 1)) strch = strch -1; else if (strch < 1) strch = strchmax; } }; };/* increase the ball position from left to right or reverse*/ switch (l2r) { case 0 : ballpos.x = ballpos.x -1; break; case 1 : ballpos.x = ballpos.x +1; break; };/* statistics check*/ gotoxy(1,25); cout << "b.x:" << ballpos.x << " "; cout << "b.y:" << ballpos.y << " "; cout << "sc:" << strchc << " "; cout << "s:" << strch << " "; cout << "l.x:" << lpad.x << " "; cout << "l.y:" << lpad.y << " "; cout << "l.ex:" << lpad.ex << " "; cout << "r.x:" << rpad.x << " "; cout << "r.y:" << rpad.y << " "; cout << "r.ex:" << rpad.ex << " "; cout << "gs:" << gamespeed << " "; wait(0); drawball(ballpos.x,ballpos.y,1); wait(gamespeed); }; return 0;} `

Edited by - whereiswez on July 7, 2001 12:33:40 PM

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