C:/Documents and Settings/benesova/Plocha/FlowVis/vislab2/FlowGrid.h

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#ifndef _FLOWGRID_H_
#define _FLOWGRID_H_

#include "cml/cml.h"

class FlowGrid
{
//private:
public:
        float *m_data;          

        float m_width;          
        float m_height;         

        float m_sampleSize;     

        float m_xNCcoef;        
        float m_yNCcoef;

        float m_widthRR;        
        float m_heightRR;       

        float m_aspectRatio;

        float RealXToNC(float realX) const;
        float RealYToNC(float realY) const;
        
        float RealXToRNC(float realX) const;
        float RealYToRNC(float realY) const;
        
        float NCXToReal(float ncX) const;
        float NCYToReal(float ncY) const;

        float RNCXToReal(float rncX) const;
        float RNCYToReal(float rncY) const;

        float NCXToRNCX(float ncX) const;
        float NCYToRNCY(float ncY) const;

        float RNCXToNCX(float rncX) const;
        float RNCYToNCY(float rncY) const;

        float GetValue(int x, int y, int cnt) const;
        float GetValueX(int *coords) { return GetValue(coords[0], coords[1], 0); }
        float GetValueY(int *coords) { return GetValue(coords[0], coords[1], 1); }
        
        float Interpolate(int cnt, float x, float y, int *tl, int *bl, int *br, int *tr) const;
public:
        FlowGrid();

        void Initialize(float widthRR, float heightRR, int width, int height, int sampleSize, float *data);

        float GetVelocityMagnitudeRNC(float x, float y) const;
        float GetVelocityMagnitudeNC(float x, float y) const;
        float GetVelocityMagnitude(float x, float y) const;
        float GetVelocityMagnitudeRR(float x, float y) const;

        cml::vector2f GetVelocityVector(float x, float y) const;
        cml::vector2f GetVelocityVectorRNC(float x, float y) const;
        cml::vector2f GetVelocityVectorNC(float x, float y) const;
        cml::vector2f GetVelocityVectorRR(float x, float y) const;

        cml::vector2f GetRRFromNC(cml::vector2f ncCoords) const;
        cml::vector2f GetNCFromRR(cml::vector2f rrCoords) const;

        float GetX(float x, float y) const;
        float GetY(float x, float y) const;
        
        float GetXNC(float x, float y) const;
        float GetYNC(float x, float y) const;
        
        float GetXRNC(float x, float y) const;
        float GetYRNC(float x, float y) const;

        bool IsValidRR(cml::vector2f rrCoords) { return (rrCoords[0] >= 0 && rrCoords[1] >=0 && rrCoords[0] < GetWidthRR() && rrCoords[1] < GetHeightRR()); }

        // size in samples.... you can access samples 0-return value - 1 
        int GetWidth() const;
        int GetHeight() const;

        // 0-1 on both axes
        float GetWidthRNC() const;
        float GetHeightRNC() const;
        
        // axes between 0-1, one of them might be smaller, ie for a 150x100 dataset, axes will be 0-1, 0-0.66
        float GetWidthNC() const;
        float GetHeightNC() const;

        // RR - really real, ie the actual, real, size of the dataset
        float GetWidthRR() const { return m_widthRR; }
        float GetHeightRR() const { return m_heightRR; }
};

#endif

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