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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.
*
* $URL$
* $Id$
*
*/
#ifndef M4_RAILS_H
#define M4_RAILS_H
#include "m4/graphics.h"
#include "common/list.h"
#include "common/array.h"
#include "common/rect.h"
// TODO: This needs cleaning up
namespace M4 {
#define MAXRAILNODES 32
#define PATH_END 0xffff
struct RailNode {
uint8 nodeID;
int32 x, y;
RailNode *shortPath;
int32 pathWeight;
};
struct NoWalkRect {
int32 x1, y1, x2, y2;
int32 alternateWalkToNode;
int32 walkAroundNode1;
int32 walkAroundNode2;
int32 walkAroundNode3;
int32 walkAroundNode4;
};
struct PathNode {
PathNode *next;
int8 nodeID;
};
struct IsWalkableData {
M4Surface *codes;
bool result;
};
class Rails {
public:
Rails();
~Rails();
void setCodeSurface(M4Surface *surface) { _walkCodes = surface; }
void clearRails();
int32 addRailNode(int32 x, int32 y, bool restoreEdges);
uint8 getDepth(const Common::Point &pt);
private:
Common::Array<RailNode *> _nodes;
Common::Array<int16 *> _edges;
Common::List<NoWalkRect *> _noWalkRects;
M4Surface *_walkCodes;
bool lineCrossesRect(int32 x1, int32 y1, int32 x2, int32 y2, Common::Rect rect);
bool linePassesThroughRect(int32 x1, int32 y1, int32 x2, int32 y2);
void createEdge(int32 node1, int32 node2);
bool removeRailNode(int32 nodeID, bool restoreEdges);
int16 getEdgeLength(int32 node1, int32 node2);
void restoreNodeEdges(int32 nodeID);
void restoreEdgeList();
void disposePath(RailNode *pathStart);
bool getShortestPath(int32 origID, int32 destID, RailNode **shortPath);
bool isLineWalkable(int x0, int y0, int x1, int y1);
};
long SqrtF16(long n);
} // End of namespace M4
#endif
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