(*
  Project: The Matrix Effect
  Ported to Delphi by: Sn!per X ^ AT4RE
  Original C++ Source: http://xoax.net/cpp/crs/misc/lessons/TheMatrixEffect/
  Release Date: 27-11-2015
*)


Program TheMatrixEffect;


{$APPTYPE CONSOLE}


uses Windows;




Function Modulus(iiN, iMod: Integer): Integer;
var iQ : Integer;
Begin
    iQ  := (iiN div iMod);
    Result := iiN - (iQ*iMod);
end;


Function GetChar(iGenerator: Integer; cBase: Char; iRange: Integer): Char;
Begin
     Result := Char(Integer(cBase) +(Modulus(iGenerator, iRange)));
end;


var
  hConsole: THANDLE;
  caRow: array [0..80] of char;
  j, k, l, m, i: Integer;
Begin
    // Color code
    hConsole := GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleTextAttribute(hConsole, 2);


    j := 7;
    k := 2;
    l := 5;
    m := 1;
    while (true) do
  begin
        // Output a random row of characters
        for i := 0 to 80-1 Do
        begin
            if (caRow[i] <> ' ') then
      begin
                caRow[i] := GetChar(j + i*i, Char(33), 30);
                if (i*i + k) mod 71 = 0 then
                    SetConsoleTextAttribute(hConsole,  7)
                else
                    SetConsoleTextAttribute(hConsole,  2);
            end;
         //    std::cout shr caRow[i];
      Write(caRow[i]);
            SetConsoleTextAttribute(hConsole,  2);
        end;
        j := (j + 31);
        k := (k + 17);
        l := (l + 47);
        m := (m + 67);
        caRow[Modulus(j, 80)] := '-';
        caRow[Modulus(k, 80)] := ' ';
        caRow[Modulus(l, 80)] := '-';
        caRow[Modulus(m, 80)] := ' ';
        // Delay
        Sleep(10);
    end; //end while
  //  return 0;
End.