- Implement zoom reset
- Implement mouse wheel events processing
- Increase zooming speed twice
- Bind zoom to mouse wheel, zoom reset to middle mouse button
- Some formatting changes (yes, I'm evil :D )
(*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2007 Andrey Korotaev <unC0Rr@gmail.com>
*
* 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; version 2 of the License
*
* 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
*)
unit uRandom;
interface
uses uFloat;
{$INCLUDE options.inc}
{$INCLUDE proto.inc}
procedure SetRandomSeed(Seed: shortstring);
function GetRandom: hwFloat; overload;
function GetRandom(m: LongWord): LongWord; overload;
function rndSign(num: hwFloat): hwFloat;
{$IFDEF DEBUGFILE}
procedure DumpBuffer;
{$ENDIF}
implementation
{$IFDEF DEBUGFILE}
uses uMisc;
{$ENDIF}
var cirbuf: array[0..63] of Longword;
n: byte = 54;
function GetNext: Longword;
begin
n:= (n + 1) and $3F;
cirbuf[n]:=
(cirbuf[(n + 40) and $3F] + {n - 24 mod 64}
cirbuf[(n + 9) and $3F]) {n - 55 mod 64}
and $7FFFFFFF; {mod 2^31}
GetNext:= cirbuf[n]
end;
procedure SetRandomSeed(Seed: shortstring);
var i: Longword;
begin
n:= 54;
if Length(Seed) > 54 then Seed:= copy(Seed, 1, 54); // not 55 to ensure we have odd numbers in cirbuf
for i:= 0 to Pred(Length(Seed)) do
cirbuf[i]:= byte(Seed[i + 1]);
for i:= Length(Seed) to 54 do
cirbuf[i]:= $A98765 + (cNetProtoVersion * 2); // odd number
for i:= 0 to 1023 do GetNext
end;
function GetRandom: hwFloat;
begin
GetNext;
GetRandom.isNegative:= false;
GetRandom.QWordValue:= GetNext
end;
function GetRandom(m: LongWord): LongWord;
begin
GetNext;
GetRandom:= GetNext mod m
end;
function rndSign(num: hwFloat): hwFloat;
begin
num.isNegative:= odd(GetNext);
rndSign:= num
end;
{$IFDEF DEBUGFILE}
procedure DumpBuffer;
var i: LongInt;
begin
for i:= 0 to 63 do
AddFileLog('[' + inttostr(i) + '] = ' + inttostr(cirbuf[i]))
end;
{$ENDIF}
end.