Use FreeAndNil across the board. Even if we are immediately assigning after, probably avoids accidental mistakes. Also free neglected owner tex on shutdown, and delete hog gears using the normal deletion procedure if for any reason they still exist (EndGame call?).
(*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2014 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
{$INCLUDE "options.inc"}
unit uGearsHandlers;
interface
uses uTypes;
function cakeStep(Gear: PGear): boolean;
implementation
uses SDLh, uFloat, uCollisions;
const dirs: array[0..3] of TPoint = ((x: 0; y: -1),
(x: 1; y: 0),
(x: 0; y: 1),
(x: -1; y: 0));
procedure PrevAngle(Gear: PGear; dA: LongInt); inline;
begin
inc(Gear^.WDTimer);
Gear^.Angle := (LongInt(Gear^.Angle) - dA) and 3
end;
procedure NextAngle(Gear: PGear; dA: LongInt); inline;
begin
inc(Gear^.WDTimer);
Gear^.Angle := (LongInt(Gear^.Angle) + dA) and 3
end;
function cakeStep(Gear: PGear): boolean;
var
xx, yy, xxn, yyn: LongInt;
dA: LongInt;
begin
dA := hwSign(Gear^.dX);
xx := dirs[Gear^.Angle].x;
yy := dirs[Gear^.Angle].y;
xxn := dirs[(LongInt(Gear^.Angle) + dA) and 3].x;
yyn := dirs[(LongInt(Gear^.Angle) + dA) and 3].y;
if (xx = 0) then
if TestCollisionYwithGear(Gear, yy) <> 0 then
PrevAngle(Gear, dA)
else
begin
Gear^.Tag := 0;
if TestCollisionXwithGear(Gear, xxn) <> 0 then
Gear^.WDTimer:= 0;
Gear^.Y := Gear^.Y + int2hwFloat(yy);
if TestCollisionXwithGear(Gear, xxn) = 0 then
begin
Gear^.X := Gear^.X + int2hwFloat(xxn);
NextAngle(Gear, dA)
end
end;
if (yy = 0) then
if TestCollisionXwithGear(Gear, xx) <> 0 then
PrevAngle(Gear, dA)
else
begin
Gear^.Tag := 0;
if TestCollisionYwithGear(Gear, yyn) <> 0 then
Gear^.WDTimer:= 0;
Gear^.X := Gear^.X + int2hwFloat(xx);
if TestCollisionYwithGear(Gear, yyn) = 0 then
begin
Gear^.Y := Gear^.Y + int2hwFloat(yyn);
NextAngle(Gear, dA)
end
end;
cakeStep:= Gear^.WDTimer < 4
end;
end.