AstroToolbox/propagateKEP.h

   1 // ------------------------------------------------------------------------ //
   2 // This source file is part of the 'ESA Advanced Concepts Team's                        //
   3 // Space Mechanics Toolbox' software.                                       //
   4 //                                                                          //
   5 // The source files are for research use only,                              //
   6 // and are distributed WITHOUT ANY WARRANTY. Use them on your own risk.     //
   7 //                                                                          //
   8 // Copyright (c) 2004-2006 European Space Agency                            //
   9 // ------------------------------------------------------------------------ //
  10
  11 #ifndef PROPAGATEKEP_H
  12 #define PROPAGATEKEP_H
  13
  14 void propagateKEP(const double *, const double *, const double &, const double &,
  15                                   double *, double *);
  16
  17 void IC2par(const double*, const double*, const double &, double*);
  18
  19 void par2IC(const double*, const double &, double*, double*);
  20
  21 // Returns the cross product of the vectors X and Y.
  22 // That is, z = X x Y.  X and Y must be 3 element
  23 // vectors.
  24 inline void cross(const double *x, const double *y, double *z)
  25 {
  26    z[0] = x[1]*y[2] - x[2]*y[1];
  27    z[1] = x[2]*y[0] - x[0]*y[2];
  28    z[2] = x[0]*y[1] - x[1]*y[0];
  29 }
  30
  31 #endif
  32
  33
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  35