sc_gravity.h

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/*
 * sc_gravity.h 
 *
 * Programmers: Mike Paluszek, David Wilson, Wil Turner
 *
 * Copyright 1999-2006, Princeton Satellite Systems. All rights reserved.
 *
 * Gravity models.
 *
 */
 
#ifndef __SC_GRAVITY__
#define __SC_GRAVITY__
 
#ifdef AS_OS_WINDOWS
#include "matrixlib.h"
#else
#include <MatrixLib/MatrixLib.h>
#endif
 
 
typedef struct gravity_s {
    double p_radius;    
    double mu;          
    ml_matrix s_coef;  
    ml_matrix c_coef;  
    ml_matrix c_dist;  
    ml_matrix s_dist;  
    ml_matrix l_coef;  
    int z_harm;         
    int t_harm;         
    int spherical;      
} gravity_t;
 
gravity_t *init_gravity(int z_harm, int t_harm, int spherical, double p_radius, double mu, const ml_matrix& c_dist, const ml_matrix& s_dist, const ml_matrix& j);
 
void destroy_gravity(gravity_t *gravity);
 
ml_matrix compute_gravity(gravity_t *gravity, const ml_matrix &x_eci, const ml_matrix &m_eci_to_ef );
 
double  total_energy_n_body (const ml_matrix& r, const ml_matrix& v, const ml_matrix& mass );
 
ml_matrix gravity_n_body( const ml_matrix& r, const ml_matrix& mass, double eps = 0 );
 
ml_matrix accel_planet( const ml_matrix& r, ml_matrix& mu, ml_matrix& rho );
 
ml_matrix accel_planet( const ml_matrix& r, double mu, ml_matrix& rho );
 
                        
#endif