/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#ifndef HPL_TILEMAP_LINE_IT_H
#define HPL_TILEMAP_LINE_IT_H

#include "hpl1/engine/math/MathTypes.h"
#include "hpl1/engine/scene/TileMap.h"
#include "hpl1/engine/scene/TileMapIt.h"

namespace hpl {

class cTileMapLineIt : public iTileMapIt {
public:
	/**
	 *
	 * \param avPos
	 * \param avSize
	 * \param apTileMap
	 * \param alLayer The layer that is to be iterated. -1 = All layers (hiding tiles behind solid ones)
	 * \return
	 */
	cTileMapLineIt(cVector2f avStartPos, cVector2f avEndPos, cTileMap *apTileMap, int alLayer);
	~cTileMapLineIt();

	bool HasNext();
	cTile *Next();
	cTile *PeekNext();
	int GetNum();
	int GetCurrentLayer();

private:
	cVector2l mvEndPos;

	cVector2f mvPos;
	cVector2f mvPosAdd;
	cVector2l mvTilePos;

	int mlLayer;
	int mlLayerCount;
	int mlCurrentLayer;
	int mlTileNum;

	bool mbUpdated;

	bool mbAtLastTile;
	bool mbAddNext;

	cTileMap *mpTileMap;
	cTile *mpTile;

	void GetTile();

	void GetXYIntersection(const cVector2f &avPosA, cVector2f *avXIntersect, cVector2f *avYIntersect);
};

} // namespace hpl

#endif // HPL_TILEMAP_LINE_IT_H