HeightMap.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_HEIGHTMAP_H__F4CB4CAD_C592_4183_AFB2_016FC66C144A__INCLUDED_)
#define AFX_HEIGHTMAP_H__F4CB4CAD_C592_4183_AFB2_016FC66C144A__INCLUDED_

#include <stdlib.h>
#include <common/ProgressCounter.h>
#include <common/FixedVector.h>
#include <common/Vector.h>

class Line;
class GraphicalHeightMap;
class HeightMap  
{
public:
        HeightMap();
        virtual ~HeightMap();

        void create(int width, int height);
        void reset();

        // Height map size fns
        int getMapWidth() { return width_; }
        int getMapHeight() { return height_; }

        // Get height fns (z values)
        inline fixed getHeight(int w, int h) { 
                if (w >= 0 && h >= 0 && w<=width_ && h<=height_) 
                        return heightData_[(width_+1) * h + w].position[2]; 
                return fixed(0); }
        fixed getInterpHeight(fixed w, fixed h);

        // Get normal functions
        FixedVector &getNormal(int w, int h);
        void getInterpNormal(fixed w, fixed h, FixedVector &normal);

        bool getIntersect(Line &direction, Vector &intersect);

        // Alters the actual internal HeightMap points
        void setHeight(int w, int h, fixed height);

        GraphicalHeightMap *getGraphicalMap() { return graphicalMap_; }
        void setGraphicalMap(GraphicalHeightMap *map) { graphicalMap_ = map; }

protected:
        struct HeightData
        {
                FixedVector position;
                FixedVector normal;
        };

        int width_, height_;
        HeightData *heightData_;
        GraphicalHeightMap *graphicalMap_;

        bool getVector(FixedVector &vec, int x, int y);
        void getVectorPos(int pos, int &x, int &y, int dist=1);
};

#endif // !defined(AFX_HEIGHTMAP_H__F4CB4CAD_C592_4183_AFB2_016FC66C144A__INCLUDED_)

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