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/* Copyright (C) 1994-1998 Revolution Software Ltd.
* Copyright (C) 2003-2005 The ScummVM project
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*
* $Header$
*/
// WALKER.CPP by James (14nov96)
// Script functions for moving megas about the place & also for keeping tabs
// on them
#include "common/stdafx.h"
#include "sword2/sword2.h"
#include "sword2/defs.h"
#include "sword2/interpreter.h"
#include "sword2/logic.h"
#include "sword2/memory.h"
#include "sword2/resman.h"
#include "sword2/router.h"
#include "sword2/driver/d_draw.h"
namespace Sword2 {
/**
* Work out direction from start to dest.
*/
// Used in whatTarget(); not valid for all megas
#define diagonalx 36
#define diagonaly 8
int Logic::whatTarget(int startX, int startY, int destX, int destY) {
int deltaX = destX - startX;
int deltaY = destY - startY;
// 7 0 1
// 6 2
// 5 4 3
// Flat route
if (ABS(deltaY) * diagonalx < ABS(deltaX) * diagonaly / 2)
return (deltaX > 0) ? 2 : 6;
// Vertical route
if (ABS(deltaY) * diagonalx / 2 > ABS(deltaX) * diagonaly)
return (deltaY > 0) ? 4 : 0;
// Diagonal route
if (deltaX > 0)
return (deltaY > 0) ? 3 : 1;
return (deltaY > 0) ? 5 : 7;
}
} // End of namespace Sword2
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