Contributor: GLENN REIFF
uses crt, dos; {$R-}
(****************************************************************************)
(* TPONG-1.PAS Glenn A. Reiff 74035,400 4/5/85 *)
(* *)
(* Note: While this program is usable and will provide some fun, the *)
(* Paddle control is not as responsive as it is in the original *)
(* Basic program. Also, the side bounces could be better. If *)
(* you are able to make any improvements I'd appreciate knowing *)
(* about them. *)
(****************************************************************************)
type Str80 = string[80];
procedure CENTER(Y:integer; Bt:Str80);
BEGIN gotoXY((80-Length(Bt)) div 2, Y); write(Bt) END;
procedure INTRODUCTION;
BEGIN
clrscr; CENTER(5,'TURBO PONG');
CENTER(8,'This is an adaption to Turbo Pascal of the Basic program ');
CENTER(9,'called PChallenge written by Karl Koessel and published in');
CENTER(10,'a 1982 issue of PC Magazine. ');
CENTER(12,'His was a simplification of Pong, the orignial video game.');
CENTER(13,'Pong was developed in the early 1970''s by Nolan Bushnell. ');
CENTER(20,'Tap a Key to Continue');
writeln; gotoXY(80,25);
repeat until keypressed;
END; { INTRODUCTION }
type CharSet = set of Char;
Str9 = string[9];
var Paddle : Str9;
StartTime,
EndTime,
CurTime,
BestTime,
Drag : integer;
Ch: char;
Procedure TEXTBORDER (color: integer);
var regs: registers;
BEGIN
With regs do begin
AH := 11; BH := 0; BL := color end;
Intr($10,regs)
END; { TEXTBORDER }
Procedure BEEP(N : Integer);
BEGIN Sound(n); Delay(100); NoSound; END;
function GET_TIME: integer;
var regs: registers;
BEGIN
with regs do begin
ax := $2C * 256;
MsDos(regs);
GET_TIME := 3600 * ch + 60 * cl + dh
end
END; { GET_TIME }
procedure CHOOSE( X,Y : integer;
Prompt : Str80;
Term : CharSet;
var TC : Char );
var I : integer;
Ch : char;
BEGIN
lowvideo; gotoXY(X,Y);
for I:=1 to length(Prompt) do begin
Ch:=Prompt[I];
if I>4 then begin
lowvideo;
if (Prompt[I-2]=' ') and (Prompt[I-1]=' ') then highvideo;
if (Prompt[I-1]='<') or (Prompt[I-1]='/') then highvideo;
end; { if I>3 }
write(Ch)
end; { for I }
repeat
TC := Upcase(ReadKey);
if not (TC in Term) then BEEP(1000)
until TC in Term
END; { CHOOSE }
procedure RESET(var Drag: integer; var Paddle: Str9);
BEGIN
TEXTBORDER(Black); textbackground(Black); clrscr;
CENTER(10,'Left and right cursor keys move paddle.');
textcolor(LightCyan);
CENTER(12,'Input drag factor: (100 is Medium...0 is FAST!) ');
read(Drag); CHOOSE(17,14,'Pick a paddle size: Small, Medium or
Large',['S','M','L'],Ch); if Ch = 'S' then Paddle := ' '+chr(27)+'
'+chr(26)+' ' else if Ch = 'M' then Paddle := ' '+chr(27)+'
'+chr(26)+' ' else if Ch = 'L' then Paddle := ' '+chr(27)+'
'+chr(26)+' 'END; { RESET }
procedure RUN;
label NewBall;
var Used : array[1..10] of integer;
var X,dX,Xpad,Y,dY,B,C,I,J,BallNr,Xstart : integer;
Flag : boolean;
procedure RANDOMIZE;
BEGIN
dx := random(7)- integer (random(7));
if dX < 0 then
repeat
dX := random(7) - integer (random(7));
if dX=0 then dX:=-1;
until (X-6)/dX=trunc((X-6)/dX);
if dX > 0 then
repeat
dX := random(7) - integer (random(7));
if dX=0 then dX:=1;
until (59-X)/dX=trunc((59-X)/dX)
END; { RANDOMIZE }
procedure POSITION_PADDLE;
BEGIN
gotoXY(Xpad,22); textbackground(LightGray);
textcolor(DarkGray); write(Paddle); textbackground(C);
END; { POSITION_PADDLE }
procedure ONKEY;
BEGIN
Ch := ReadKey;
if Ch = #27 then { it must be a function key }
Ch := ReadKey;
case Ch of
'K': if Xpad > 7 then begin
Xpad:=Xpad-3; POSITION_PADDLE;
gotoXY(Xpad+length(Paddle),22); write(' '); end;
'M': if Xpad + length(Paddle) < 60 then begin
Xpad:=Xpad+2; POSITION_PADDLE;
gotoXY(Xpad-3,22); write(' '); end;
end; { case }
END; { ONKEY }
BEGIN
J := 11; Xpad := 29; C := random(16);
if c in [0, 1, 6..9, 12, 15] then C := 2;
textbackground(C); clrscr; TEXTBORDER(C);
for X:=8 to 17 do begin { Setup 10 Balls }
J := J + 4; textbackground(red); textcolor(white);
gotoXY(J,2); write(#2); textbackground(C);
end; { for X }
textcolor(Blue);
GotoXY (5, 3);
for X:=5 to 59 do write(#219); { Draw Backboard }
for Y:=3 to 21 do begin { Draw Walls }
gotoXY (5,Y); write (#219#219);
gotoXY (59,Y); write (#219#219);
end;
POSITION_PADDLE; textcolor(Black);
gotoXY(5,24); write('Best Time so far is ',BestTime,' seconds.');
gotoXY(66,3); write('TURBOPONG');
gotoXY(63,6); write('Initial Drag ',Drag);
FillChar (Used, 20, 0);
BallNr := 10;
StartTime := GET_TIME;
while BallNr > 0 do begin
repeat
Xstart := 1 + random(10); Flag:=false;
for I:=1 to 10 do if Used[I] = Xstart then Flag:=true;
until not Flag;
Used[BallNr]:=Xstart;
Xstart := 11 + 4 * Xstart;
gotoXY(Xstart,2); write(' ');
X := Xstart; Y := 4; dY := 1; Flag := false;
RANDOMIZE;
while Y < 23 do begin
if keypressed then ONKEY;
textbackground(C);
if (Y > 4) and (X in [7..58]) then { Erase Previous Ball Below }
begin gotoXY(X,Y-1); write(' '); end;
if (Y < 21) and (X in [7..58]) then
begin gotoXY(X,Y+1); write(' '); end; { Erase Previous Ball Above }
if (Y=21) and (X-Xpad in [0..length (Paddle)]) then
begin gotoXY(X,Y); write(' '); end; { Erase Ball On Paddle }
X:=X + dX;
textbackground(red); textcolor(white);
if X in [7..58] then begin
gotoXY(X,Y); write(#1) { Print New Ball Position }
end;
gotoXY(80,25);
if not (x in [8..57]) then begin
BEEP(300+random(80*BallNr)); dX:=-dX;
end; { Side Wall Bounce }
if keypressed then ONKEY;
if (Y=21) and (X-Xpad in [0..length(Paddle)]) then begin
dY := -dY; BEEP(700); { Bounce Off Of Paddle }
if dX = 0 then RANDOMIZE;
end; { if Y=21 }
if Y = 22 then begin
textbackground(C); gotoXY(X,Y); write(' ');
textbackground(red); textcolor(white); { Park Used Ball }
gotoXY(25+Xstart,Y+2); write(#1); gotoXY(80,25);
end;
if keypressed then ONKEY;
if (Y = 4) and Flag then begin { Bounce Off of Top Backboard }
BEEP(300+random(80*BallNr));
Drag := Drag - 5; { Reduce Amout of Drag }
if dX = 0 then RANDOMIZE;
inc (dX); dY := -dY; Y := Y + dY
end else begin Y := Y + dY; Flag := true end;
if Drag <0 then Drag := 0;
delay(50+Drag);
end; { while Y }
BallNr := BallNr - 1; textbackground(C);
end; { while BallNr }
gotoXY(1,22); clreol;
textcolor(Black); gotoXY(63,8); if Drag < 0 then Drag := 0;
write('Final Drag ',Drag);
EndTime := GET_TIME;
CurTime := EndTime - StartTime;
if CurTime > BestTime then BestTime := CurTime;
gotoXY (5,24); write('Best Time so far is ',BestTime,' seconds.');
gotoXY (63,11); write('This Run ', CurTime, ' sec.');
END; { RUN }
{MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM}
BEGIN
BestTime := 0; Drag := 0; Paddle := '';
INTRODUCTION;
RESET(Drag,Paddle);
repeat
RUN;
CHOOSE(19,22,' Quit Reset Continue ',['Q','R','C'],Ch);
if Ch = 'R' then RESET(Drag,Paddle);
until Ch = 'Q';
TEXTBORDER(Black); textbackground(Black); clrscr;
END.