C:/Projekte/C++/FlowVIS_107/src/StreamLineGrid.h

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#ifndef STREAMLINEGRID_H
#define STREAMLINEGRID_H

#include "common.h"
#include <vector>

using namespace std;


#define NUM_NEIGHBORS 3   // number of neighbor-cell to test (value for one dimension), i.e. 3 == get 9 cells


struct slgGridCell
{  
  vector<vec3> points;  // SL-sample-points in this cell
};


class StreamLineGrid
{

public:
  StreamLineGrid( float dSep );

  ~StreamLineGrid();

  bool addPoint( vec3 point );

  float getMinimalDistance( vec3 point, vec3 exceptionPoint );

  //bool isValidPoint( vec3 point );

  void printGrid();


private:

  int getCellIndex( vec3 point );

  int getCellIndex( int idxX, int idxY );

  int getCellIndexX( vec3 point );

  int getCellIndexY( vec3 point );

  slgGridCell getCell( int cellIdx );

  //vector<vec3> getCellPoints( int cellIdx );

  slgGridCell* getSurroundingCells( vec3 point );


private:

  // gv Regular grid for fast sample-points-lookup
  slgGridCell *m_grid; 

  int m_dim;

  float m_cellSize;

};

#endif

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