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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 TOON_PATH_H
#define TOON_PATH_H
#include "toon/toon.h"
namespace Toon {
// binary heap system for fast A*
struct HeapDataGrid {
int16 _x, _y;
int16 _weight;
};
class PathFindingHeap {
public:
PathFindingHeap();
~PathFindingHeap();
void push(int32 x, int32 y, int32 weight);
void pop(int32 *x, int32 *y, int32 *weight);
void init(int32 size);
void clear();
void unload();
int32 getCount() { return _count; }
private:
HeapDataGrid *_data;
int32 _size;
int32 _count;
};
class PathFinding {
public:
PathFinding(ToonEngine *vm);
~PathFinding();
int32 findPath(int32 x, int32 y, int32 destX, int32 destY);
int32 findClosestWalkingPoint(int32 xx, int32 yy, int32 *fxx, int32 *fyy, int origX = -1, int origY = -1);
bool isWalkable(int32 x, int32 y);
bool isLikelyWalkable(int32 x, int32 y);
bool lineIsWalkable(int32 x, int32 y, int32 x2, int32 y2);
bool walkLine(int32 x, int32 y, int32 x2, int32 y2);
void init(Picture *mask);
void resetBlockingRects();
void addBlockingRect(int32 x1, int32 y1, int32 x2, int32 y2);
void addBlockingEllipse(int32 x1, int32 y1, int32 w, int32 h);
int32 getPathNodeCount() const;
int32 getPathNodeX(int32 nodeId) const;
int32 getPathNodeY(int32 nodeId) const;
protected:
Picture *_currentMask;
PathFindingHeap *_heap;
int32 *_gridTemp;
int32 _width;
int32 _height;
int32 _tempPathX[4096];
int32 _tempPathY[4096];
int32 _blockingRects[16][5];
int32 _numBlockingRects;
int32 _allocatedGridPathCount;
int32 _gridPathCount;
ToonEngine *_vm;
};
} // End of namespace Toon
#endif
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