Life Game

Adapted by Joao Paulo Schwarz Schuler

{ Life Game }
{ Virtual Pascal Source for OS/2 }
{ Constructed by John H. Conway }
{ Adapted by Joao Paulo Schwarz Schuler }

uses Os2Base,Use32;

const
  VioMode: VioModeInfo =
   ( cb:     SizeOf(VioModeInfo);
     fbType: vgmt_Other + vgmt_Graphics;
     Color:  colors_256;
     Col:    40;
     Row:    25;
     HRes:   320;
     VRes:   200
   );

  VioBuf: VioPhysBuf =
   ( pBuf: Ptr($a0000);
     cb:   64*1024
   );

type
  Ptr16Rec = record
    Ofs,Sel: SmallWord;
  end;

function KeyPressed: Boolean;
var
  Key: KbdKeyInfo;
begin
  KbdCharIn(Key, io_NoWait, 0);
  KeyPressed := (Key.fbStatus and kbdtrf_Final_Char_In) <> 0;
end;

type matr = array[1..320,1..200] of boolean ;
var cel ,cel2 :^matr;

function visit(x,y:integer):byte;
var co:byte;
begin
co:=0;
if cel2^[x-1,y-1]  then co:=co+1;
if cel2^[x  ,y-1]  then co:=co+1;
if cel2^[x+1,y-1]  then co:=co+1;

if cel2^[x-1,y] then co:=co+1;
if cel2^[x+1,y] then co:=co+1;

if cel2^[x-1,y+1] then co:=co+1;
if cel2^[x  ,y+1] then co:=co+1;
if cel2^[x+1,y+1] then co:=co+1;
visit:=co;
end;

var  OrgMode: VioModeInfo;

procedure HaltError(const ErrMsg: String);
begin
  VioSetMode(OrgMode, 0);
  WriteLn('**Error**  ', ErrMsg);
  Halt(1);
end;

var VioBufOfs: Longint;
    c:byte;
    xc,yc:integer;
    bo:boolean;
    CA:CHAR;

procedure invis;
var i,i2:integer;
begin
for i:=1 to 320 do
    for i2:=1 to 200 do
        cel^[i,i2] := (mem[VioBufOfs+i*320+i2] <> 0);
end;

begin  (* begin of program *)
OrgMode.cb := SizeOf(VioModeInfo);
VioGetMode(OrgMode, 0);
if VioSetMode(VioMode, 0) <> 0 then
   HaltError('VGA display required.');
if VioGetPhysBuf(VioBuf, 0) <> 0 then
   HaltError('Cannot access video screen selector.');
Ptr16Rec(VioBufOfs).Ofs := 0;
Ptr16Rec(VioBufOfs).Sel := VioBuf.Sel;
SelToFlat(Pointer(VioBufOfs));
FillChar(Pointer(VioBufOfs)^,64*1024,0);

new(CEL);
new(CEL2);
randomize;

for xc:=1 to 9000 do
    mem[VioBufOfs+((round(random(318))+1)*320+round(random(198))+1)]:=25;

invis;
repeat
  cel2^:=cel^;
  for yc:= 1 to 199 do
      for xc:=1 to 319 do
          begin
          c:=visit(xc,yc);
          if c=0 then cel^[xc,yc]:=false
                 else cel^[xc,yc]:=((c=2) and (cel2^[xc,yc])) or (c=3);
          end;


  for yc:= 1 to 199 do
      for xc:= 1 to 319 do
          begin
          if cel^[xc,yc] then
             begin
             c:=mem[VioBufOfs+yc*320+xc];
             if c=0 then
                c:=24;
             mem[VioBufOfs+yc*320+xc]:=c+1;
             end
           else
             mem[VioBufOfs+yc*320+xc]:=0;
          end; { for }
until keypressed;

VioSetMode(OrgMode, 0);
dispose(CEL);
dispose(CEL2);
end.

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