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70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/* Copyright (C) 1994-1998 Revolution Software Ltd.
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* Copyright (C) 2003-2005 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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// WALKER.CPP by James (14nov96)
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// Script functions for moving megas about the place & also for keeping tabs
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// on them
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#include "common/stdafx.h"
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#include "sword2/sword2.h"
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#include "sword2/defs.h"
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#include "sword2/logic.h"
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#include "sword2/resman.h"
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#include "sword2/router.h"
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namespace Sword2 {
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/**
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* Work out direction from start to dest.
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*/
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// Used in whatTarget(); not valid for all megas
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#define diagonalx 36
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#define diagonaly 8
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int Logic::whatTarget(int startX, int startY, int destX, int destY) {
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int deltaX = destX - startX;
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int deltaY = destY - startY;
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// 7 0 1
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// 6 2
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// 5 4 3
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// Flat route
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if (ABS(deltaY) * diagonalx < ABS(deltaX) * diagonaly / 2)
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return (deltaX > 0) ? 2 : 6;
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// Vertical route
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if (ABS(deltaY) * diagonalx / 2 > ABS(deltaX) * diagonaly)
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return (deltaY > 0) ? 4 : 0;
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// Diagonal route
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if (deltaX > 0)
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return (deltaY > 0) ? 3 : 1;
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return (deltaY > 0) ? 5 : 7;
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}
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} // End of namespace Sword2
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