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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef ILLUSIONS_PATHFINDER_H
#define ILLUSIONS_PATHFINDER_H
#include "illusions/graphics.h"
#include "common/array.h"
#include "common/list.h"
#include "common/rect.h"
namespace Illusions {
struct PathLine {
Common::Point p0, p1;
};
typedef Common::Array<PathLine> PathLines;
typedef Common::Array<Common::Point> PointArray;
class PathFinder {
public:
PointArray *findPath(Camera *camera, Common::Point sourcePt, Common::Point destPt,
PointArray *walkPoints, PathLines *walkRects, WidthHeight bgDimensions);
protected:
PathLine _screenRect;
PointArray *_walkPoints;
PathLines *_walkRects;
WidthHeight _bgDimensions;
byte *_pathBytes;
PointArray *findPathInternal(Common::Point sourcePt, Common::Point destPt);
void postProcess(Common::Point sourcePt, PointArray *foundPath);
bool isLineBlocked(PathLine &line);
int calcLineDistance(PathLine &line);
bool findClosestPt(Common::Point &sourcePt, Common::Point &closestPt, Common::Point &destPt);
bool findValidDestLine(Common::Point &destPt);
void findValidDestPt(Common::Point &destPt);
WidthHeight calcRectDimensions(PathLine &rect);
void adjustRectDimensions(WidthHeight &dimensions);
void swapDimensions(WidthHeight &dimensions);
void clipLineToBg(Common::Point &destPt, WidthHeight &rectDimensions, PathLine &outDestLine);
void findDeltaPt(Common::Point pt, Common::Point &outDeltaPt);
bool isLineWithinRectangle(PathLine &line, PathLine &rect);
void swapLine(PathLine &line, PathLine &outLine);
int calcLineStatus(PathLine &sourceLine, PathLine &destRect, Common::Point *outPoint);
};
} // End of namespace Illusions
#endif // ILLUSIONS_PATHFINDER_H
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