flowvis_data.h

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#ifndef FLOWVIS_DATA_H
#define FLOWVIS_DATA_H

#include "vec3.h"

#include <glew.h>

#include <vector>
#include <string>

typedef std::vector<std::vector<vec3> > Grid_T;
typedef std::vector<std::vector<float> > DataVec_T;
typedef std::vector<std::vector<vec3> > VelocityVec_T;
typedef std::vector<GLfloat> VertexData_T;
typedef std::vector<GLfloat> ColorData_T;
typedef std::vector<GLuint> IndexData_T;

struct Time_S
{
    VelocityVec_T velocity;

    std::vector<DataVec_T> data;
};

typedef std::vector<Time_S> TimeVec_T;

class FlowVisData
{
public:
    FlowVisData();

    ~FlowVisData() { }

    void LoadFromFile(const char *filename);
    
    VertexData_T GetVertexData();

    ColorData_T GetColorData(int time, int dataset);

    IndexData_T GetIndexData();

    void NormalizeVelocity();

    int GetWidth() { return m_x; }
    int GetHeight() { return m_y; };

    vec3 m_grid_min; 
    vec3 m_grid_max; 

    vec3 m_grid_cell_min; 

    float m_grid_cell_min_x; 
    float m_grid_cell_min_y; 

    std::vector<float> m_data_min; 
    std::vector<float> m_data_max; 

    int GetNrSets() { return m_sets; }

    vec3 GetVelocityAt(const float x, const float y);

    float m_max_velocity_length;

private:
    void LoadGrid(const char*filename);
    
    void LoadData(const char*filename, int time_index);

    void BuildGridLookup();
    
    Grid_T m_grid;
    int m_x;
    int m_y;
    int m_z;
    int m_sets;
    int m_timestamps;
    float m_interval;

    std::vector<float> m_grid_x;

    std::vector<float> m_grid_y;

    bool m_swaped;

    TimeVec_T m_time;
};

#endif // FLOWVIS_DATA_H

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