sc_ellipse_geometry.h

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/*
 *  sc_ellipse_geometry.h
 *  SCControl
 *
 *  Created by Alice Cao on 9/25/11.
 *  Copyright 2011 Princeton Satellite Systems. All rights reserved.
*/
 
#ifndef SCControl_ellipse_geometry_h
#define SCControl_ellipse_geometry_h
 
#ifdef AS_OS_WINDOWS
#include "matrixlib.h"
#else
#include <MatrixLib/MatrixLib.h>
#endif
 
 
struct ellipse_geometry_struct {
    double x0;  
    double y0;  
    double a1;  
    double a2;  
    double phi; 
};
 
struct ellipse_geometry_struct_m {
    ml_matrix x0;  
    ml_matrix y0;  
    ml_matrix a1;  
    ml_matrix a2;  
    ml_matrix phi; 
};
 
struct ellipse_coefficients {
    double A;   
    double B;   
    double C;   
    double D;   
    double E;   
    double F;   
};
 
struct ellipse_points {
    ml_matrix x;        
    ml_matrix y;        
    ml_matrix r;        
    ml_matrix drdt;     
    ml_matrix dxdt;     
    ml_matrix dydt;     
    ml_matrix slope;    
    ml_matrix theta;    
};
 
struct ellipse_point_on_tangent {
    ml_matrix x;    
    ml_matrix y;    
    ml_matrix b;    
    double m;       
};
 
struct ellipse_min_dist {
    double d;       
    double x;       
    double y;       
    bool in_ellipse; 
};
 
class ellipse_geometry
{
 
private:
    
    // ellipse geometry variables
    ellipse_geometry_struct ellipse_geom_data;
 
    // ellipse coefficients
    ellipse_coefficients ellipse_coeff;
    
    // coeff to params
    void set_coeffs();
    
    // params to coeff
    void set_params();
    
    
public:
 
    ellipse_geometry();
    
    ellipse_geometry(double A, double B, double C, double D, double E, double F);
    
    ellipse_geometry(ellipse_coefficients coeffs);
 
    ellipse_geometry(double x0, double y0, double a1, double a2, double phi);
    
    ellipse_geometry(ellipse_geometry_struct params);
    
    ellipse_geometry_struct get_ellipse_params();
    
    ellipse_coefficients get_ellipse_coeff();
    
    ellipse_points get_ellipse_pts(int n, double th0=0);
    
    ellipse_point_on_tangent get_ellipse_point_on_tangent(double alpha);
    
    ellipse_min_dist get_ellipse_min_dist(double xp, double yp, int sense=-1);
    
    ellipse_geometry_struct ellipsoid_to_ellipse(ml_matrix M, ml_matrix p);
 
    static ellipse_geometry_struct get_ellipse_with_index(ellipse_geometry_struct_m ellipse_geom_m, int index);
    
    static void set_ellipse_with_index(ellipse_geometry_struct_m &ellipse_geom_m, int index, double x0, double y0, double  a1, double a2, double phi);
    
 
};
 
#endif