DtDropParticle.h

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/*****************************************************************************
* Copyright (c) 2020 MAK Technologies, Inc.
* All rights reserved.
*****************************************************************************/

#pragma once


#include <vrvPostProcessor/vrvPostProcessor.h>
#include <vrvPostProcessor/DtWaterOnScreenDefines.h>
#include <vrvPostProcessor/DtGridCell.h>

#include <osg/Vec2f>
#include <osg/Vec2s>

#include <vector>

namespace osg
{
   class Image;
}

namespace makVrv
{
   class DtDropParticle
   {
   public:
      DtDropParticle(float px, float py, float pMass, double time,
         DtGridCell grid[][GRID_DIMENSION]);

      virtual ~DtDropParticle();
   private:
      DtDropParticle();

      DtDropParticle(const DtDropParticle&);

      DtDropParticle& operator=(const DtDropParticle&);
   public:

      virtual void setParent(DtDropParticle *drop);
      virtual DtDropParticle *parent() const;

      virtual float mass() const;
      virtual void setMass(float m);

      virtual const osg::Vec2f& velocity() const;

      virtual void affectedCells(std::vector<osg::Vec2s>& cells) const;

      virtual void computeRadius(double waterOnScreenSize);

      virtual void update(double time, double elapsedTime,
         DtGridCell grid[][GRID_DIMENSION],
         bool& destroyFlag) = 0;

      virtual void gridPosition(int& gx, int& gy) const;

      virtual void renderToNormalMap(osg::Image *image);

      virtual bool mergeable() const;

      virtual unsigned int precomputedDropletTexel(float x, float y);

      static void precomputeDroplet();
   protected:

      static unsigned int myPrecomputedDroplet[PRECOMPUTED_DIM][PRECOMPUTED_DIM];
      static bool myDropletInitialized;

      float myX, myY, myRadius, myMass, myV0;
      double myT0;
      float myAcceleration;
      DtDropParticle *myParent;

      osg::Vec2f myDirection, myVelocity;
      int myLastGridX, myLastGridY;

      bool myMergeable;
   };

}