examples/JAcoustics/JSeabed.cc

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#include <string>
#include <iostream>
#include <iomanip>
#include <vector>
 
#include "JDetector/JTripod.hh"
 
#include "JMath/JSVD3D.hh"
 
#include "Jeep/JContainer.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"
 
 
/**
 * \file
 * Auxiliary application to determine tilt angles of seabed based on tripod positions.
 *
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;
 
  typedef JContainer< vector<JTripod> >      tripods_container;
 
  tripods_container  tripods;
  int                debug;
 
  try { 
 
    JParser<> zap("Auxiliary application to determine tilt angles of seabed based on tripod positions.");
    
    zap['T'] = make_field(tripods);
    zap['d'] = make_field(debug)   = 1;
    
    zap(argc, argv);
  }
  catch(const exception& error) {
    FATAL(error.what() << endl);
  }
 
  if (tripods.size() < 3) {
    FATAL("Number of tripods " << tripods.size() << endl);
  }
 
  // center
 
  JUTMPosition pos(0.0, 0.0, 0.0);
  
  for (tripods_container::const_iterator i = tripods.begin(); i != tripods.end(); ++i) {
    pos += i->getUTMPosition();
  }
 
  pos /= tripods.size();
 
  DEBUG("center: "
        << showpos << FIXED(12,3) << pos.getX() << ' ' 
        << showpos << FIXED(12,3) << pos.getY() << ' '
        << showpos << FIXED(12,3) << pos.getZ() << endl);
 
  // solve z(x,y) = a*x + b*y + c
 
  JMatrix3D A;
  double    Y[3] = { 0.0, 0.0, 0.0 };
 
  for (tripods_container::const_iterator i = tripods.begin(); i != tripods.end(); ++i) {
 
    const double x = i->getX() - pos.getX();
    const double y = i->getY() - pos.getY();
    const double z = i->getZ() - pos.getZ();
    
    A.a00 += x * x;  A.a01 += x * y;  A.a02 += x;
    A.a10 += x * y;  A.a11 += y * y;  A.a12 += y;
    A.a20 += x;      A.a21 += y;      A.a22 += 1.0;
 
    Y[0]  += x * z;
    Y[1]  += y * z;
    Y[2]  += z;
  }
 
  DEBUG(A);
  
  JSVD3D V(A);
 
  try {
 
    A = V.invert();
 
    const double a  = A.a00 * Y[0] + A.a01 * Y[1] + A.a02 * Y[2];
    const double b  = A.a10 * Y[0] + A.a11 * Y[1] + A.a12 * Y[2];
    //const double c  = A.a20 * Y[0] + A.a21 * Y[1] + A.a22 * Y[2];
    /*
    const double Rx = atan(+b);   // rotation aroud x-axis
    const double Ry = atan(-a);   // rotation aroud y-axis
 
    cout << showpos << FIXED(12,6) << Rx << ' ' 
         << showpos << FIXED(12,6) << Ry << endl;
    */
 
    const double Tx =  a;
    const double Ty =  b;
 
    cout << showpos << FIXED(12,6) << Tx << ' ' 
         << showpos << FIXED(12,6) << Ty << endl;
  }
  catch(const exception& error) {
    FATAL(error.what());
  }
 
  return 0;
}