WaterWaves.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(__INCLUDE_WaterWavesh_INCLUDE__)
#define __INCLUDE_WaterWavesh_INCLUDE__

#include <common/Vector.h>
#include <common/ProgressCounter.h>
#include <GLEXT/GLTexture.h>
#include <vector>

class Water2Patches;
class WaterWaves
{
public:
        WaterWaves();
        virtual ~WaterWaves();

        void generateWaves(float waterHeight, ProgressCounter *counter = 0);
        void draw(Water2Patches &currentPatch);
        void simulate(float frameTime);

protected:
        struct WaterWaveEntry 
        {
                Vector perp;
                Vector ptA;
                Vector ptB;
                Vector ptC;
                Vector ptD;
        };
        struct WaterWaveContext
        {
                int mapWidth;
                int mapHeight;
                int pointsWidth;
                int pointsHeight;
                int pointsMult;
                bool *wavePoints;
                unsigned int pointCount;
                unsigned int removedCount;
        };

        GLTexture wavesTexture1_;
        GLTexture wavesTexture2_;
        Vector wavesColor_;

        std::vector<WaterWaveEntry> paths1_;
        std::vector<WaterWaveEntry> paths2_;
        float totalTime_;

        void findPoints(WaterWaveContext *context,
                float waterHeight, ProgressCounter *counter);
        bool findNextPath(WaterWaveContext *context,
                float waterHeight, ProgressCounter *counter);
        void findPath(WaterWaveContext *context,
                std::vector<Vector> &points, int x, int y, ProgressCounter *counter);
        void constructLines(WaterWaveContext *context,
                float waterHeight, std::vector<Vector> &points);
        void drawBoxes(Water2Patches &currentPatch,
                float totalTime, Vector &windDir, 
                std::vector<WaterWaveEntry> &paths);

};

#endif

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