HeightData.h

#pragma once
#include <string>
#include <math.h>
#include "DataTyps.h"
#include "MathExt.h"
#include <stdio.h>
using namespace std;
typedef struct rect{double minlat, maxlat,minlon,maxlon;}rect;
typedef struct recti{int minlat, maxlat,minlon,maxlon;}recti;
typedef struct CubicKernel3{int index[6]; double weights[6];}CubicKernel3;



class HeightData
{
public:
    HeightData(void);
    ~HeightData(void);

    double height(double lon,double lat,void* hc,short mode);
    void set_SRTM3_folder(char* folder);
    void set_rect(double minlat,double maxlat,double minlon,double maxlon);
    void reset_t(double minlat,double maxlat,double minlon,double maxlon);
                                        //Erstellt das Gitter
    int max_t();

    double height_t(double lon,double lat,void* hc,short mode);
    void paek_pro(double lon, double lat, qint64** c,float* Ahigher, int cc,
                  int ac, float d,float mperlon, float mperlat);

    void interpolate_linear(int width,int height,double alpha,
                            double** h, double** dhdx, double** dhdy);

    void interpolate_linear_mercator(int width,int height,double alpha,
                            double** h, double** dhdx, double** dhdy);

    void interpolate_bicubic_conv3(int width,int height,double alpha,
                                   double** h, double** dhdx, double** dhdy);

    void interpolate_bicubic_conv3_mercator(int width,int height,double alpha,
                                   double** h, double** dhdx, double** dhdy);

    void get_sorted_grid_data(short** heights, double** lons, double** lats,
                              long* count);
    recti get_GridRect();
    int correct_hgt(char* filename);
private:
    int sx,sy,nReserve;                 
    rect DEMRect;                       
    recti GridRect;                     
    char SRTM3folder[1000];             
    void create_grid();                 
    void free_grid();                   
    short**  grid;                      
    int lty(double lat);                
    int ltx(double lon);                
    double ltdy(double lat);            
    double ltdx(double lon);            
    void sort_GridList(long s, long e);
    short *qsh; double *qslon,*qslat;
    double Cubic_conv_kernel3(double x);
    double Cubic_conv_kernel3_d(double x);
    double Bicubic_conv3(CubicKernel3 kx, CubicKernel3 ky);
};