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AvCoordinateSystem.cc
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AvCoordinateSystem.cc
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//# Copyright (C) 1995-2002 Board of Trustees of the University of Illinois
//#
//# This software, both binary and source, is copyrighted by The
//# Board of Trustees of the University of Illinois. Ownership
//# remains with the University. You should have received a copy
//# of a licensing agreement with this software. See the file
//# "AIPSVIEW_COPYRIGHT", or contact the University at this address:
//#
//# The NCSA AipsView Visualization System
//# National Center for Supercomputing Applications
//# University of Illinois
//# 405 North Mathews Ave.
//# Urbana, IL 61801
//# --------------------------------------------------
//
//
// $Header: /home/cvs/aips++/code/trial/apps/aipsview/Attic/AvCoordinateSystem.cc,v 19.1 2003/09/10 05:03:21 mcalabre Exp $
//
// $Log: AvCoordinateSystem.cc,v $
// Revision 19.1 2003/09/10 05:03:21 mcalabre
// Modified to use WCSLIB 3.2.
//
// Revision 19.0 2003/07/16 05:47:06 aips2adm
// exhale: Base release 19.000.00
//
// Revision 18.0 2002/06/07 21:28:49 aips2adm
// exhale: Base release 18.000.00
//
// Revision 17.1 2002/01/03 19:51:15 hravlin
// Define M_PI if it's not defined in math.h.
//
// Revision 17.0 2001/11/12 19:42:18 aips2adm
// exhale: Base release 17.000.00
//
// Revision 16.0 2001/05/03 01:42:26 aips2adm
// exhale: Base release 16.000.00
//
// Revision 15.0 2000/10/26 17:09:52 aips2adm
// exhale: Base release 15.000.00
//
// Revision 14.0 2000/03/23 16:08:09 aips2adm
// exhale: Base release 14.000.00
//
// Revision 13.0 1999/08/10 18:39:56 aips2adm
// exhale: Base release 13.000.00
//
// Revision 12.0 1999/07/15 00:22:31 aips2adm
// exhale: Base release 12.000.00
//
// Revision 11.0 1998/10/03 06:59:34 aips2adm
// exhale: Base release 11.000.00
//
// Revision 10.0 1998/07/20 17:53:23 aips2adm
// exhale: Base release 10.000.00
//
// Revision 9.0 1997/08/25 21:26:56 aips2adm
// exhale: Base release 09.000.00
//
// Revision 8.0 1997/02/20 03:16:24 aips2adm
// exhale: Base release 08.000.00
//
// Revision 7.7 1997/02/18 21:25:34 jpixton
// corrected NCP projection map.
//
// Revision 7.6 1997/01/24 18:38:26 hr
// Added definition for M_PI if it isn't defined with the GNU compiler.
//
// Revision 7.5 1996/12/12 09:37:53 droberts
// Added mapping to initialize AipsView CoordinateSystem classes. Added simple constructor for linear coordinate system. Added NCP support.
//
// Revision 1.12 1996/11/18 20:40:12 hr
// Added RCS header.
//
//
//---------------------------------------------------------------------------
#include <assert.h>
#include <math.h>
#if !defined(M_PI)
#define M_PI 3.14159265358979323846
#endif
#include "AvCoordinateSystem.h"
#include "AvCelestialProjection.h"
#include "AvLinearMap.h"
#include "AvUnits.h"
AvCoordinateSystem::AvCoordinateSystem(const int nAxes)
: nAxes_(nAxes), cp_(0), lm_(0), crvals_(0), longpole_(999.0),
longAxis_(-1), latAxis_(-1), axisNames_(0),
axisCoordSysNames_(0),
axisUnits_(0),
axisMeasurementNames_(0)
{
axisNames_ = new AvString[nAxes_];
axisCoordSysNames_ = new AvString[nAxes_];
axisUnits_ = new AvString[nAxes];
axisMeasurementNames_ = new AvString[nAxes_];
crvals_ = new double[nAxes_];
double * crpixs = new double[nAxes_];
double * cdelts = new double[nAxes_];
double * pcmatrix = new double[nAxes_*nAxes_];
memset(pcmatrix, 0, nAxes_*nAxes_*sizeof(double));
double projParms[10];
memset(projParms, 0, 10*sizeof(double));
for (int a = 0; a < nAxes_; a++)
{
char buf[20];
sprintf(buf, "axis%d", a+1);
axisNames_[a] = buf;
axisCoordSysNames_[a] = "pixels";
axisUnits_[a] = "";
axisMeasurementNames_[a] = "pixels";
crvals_[a] = 1.0;
crpixs[a] = 1.0;
cdelts[a] = 1.0;
pcmatrix[a+nAxes_*a] = 1.0;
}
lm_ = new AvLinearMap(crpixs,
cdelts,
pcmatrix,
nAxes_);
delete [] crpixs;
delete [] cdelts;
delete [] pcmatrix;
}
AvCoordinateSystem::AvCoordinateSystem(const int nAxes,
const AvString * ctypes,
const double * crvals,
const double * crpixs,
const double * cdelts,
const double * pcmatrix,
const double * projps,
const double longpole)
: nAxes_(nAxes), cp_(0), lm_(0), crvals_(0), longpole_(longpole), longAxis_(-1), latAxis_(-1), axisNames_(0), axisCoordSysNames_(0), axisUnits_(0),
axisMeasurementNames_(0)
{
AvString projSystemName;
axisNames_ = new AvString[nAxes];
axisCoordSysNames_ = new AvString[nAxes];
axisUnits_ = new AvString[nAxes];
axisMeasurementNames_ = new AvString[nAxes];
// Read and interpret the ctype keywords
for (int a = 0; a < nAxes_; a++)
{
AvString s = upcase(ctypes[a]);
if (ctypes[a].contains(AvRegex("^... \\(Right Ascension\\)\\|\\(Declination\\)")))
{
// AIPS++ ImageCoordinate format
axisNames_[a] = ((AvString) ctypes[a]).after(3);
axisCoordSysNames_[a] = ((AvString) ctypes[a]).before(3);
if (axisNames_[a] == "Right Ascension")
{
projSystemName = axisCoordSysNames_[a];
longAxis_ = a;
}
else if (axisNames_[a] == "Declination")
{
latAxis_ = a;
}
}
if (s.contains("-"))
{
// divide the type string into axis name and coordinate system
AvString sn = AvString(s.at(0,4));
AvString sc = AvString(s.at(4,4));
assert(s.OK());
assert(sn.OK());
assert(sc.OK());
assert(ctypes[0].OK());
assert(ctypes[1].OK());
assert(ctypes[2].OK());
#ifdef AVWCSDEBUG
#if 0
cout << "axis #" << a+1 << ", name = '" << sn << "', coord sys = '" <<
sc << "'\n";
cout.flush();
#endif
#endif
// Strip away all -'s from both
sn.gsub("-","");
sc.gsub("-","");
axisNames_[a] = sn;
axisCoordSysNames_[a] = sc;
#ifdef AVWCSDEBUG
#if 0
cout << "axis #" << a+1 << ", name = '" << axisNames_[a] << "', coord sys = '" <<
axisCoordSysNames_[a] << "'\n";
cout.flush();
#endif
#endif
if (axisNames_[a].contains(AvRegex("^\\(\\(RA\\)\\|\\(GLON\\)\\|\\(ELON\\)\\)")))
{
#ifdef AVWCSDEBUG
cout << "Found first projection axis = axis #" << a+1 << endl;
#endif
// if RA,GLON,ELON, setup projection and mark axis
projSystemName = axisCoordSysNames_[a];
longAxis_ = a;
}
else if (axisNames_[a].contains(AvRegex("^\\(\\(DEC\\)\\|\\(GLAT\\)\\|\\(ELAT\\)\\)")))
{
// if DEC,GLAT,ELAT, have second of pair, so mark that axis
#ifdef AVWCSDEBUG
cout << "Found second projection axis = axis #" << a+1 << endl;
#endif
latAxis_ = a;
}
}
else
{
// have a weird axis
axisNames_[a] = ctypes[a];
if (ctypes[a].contains("Polarization"))
{
axisCoordSysNames_[a] = "stokes";
axisUnits_[a] = "stoke index";
axisMeasurementNames_[a] = "polarization";
}
else if (axisNames_[a].contains("STOKES"))
{
axisCoordSysNames_[a] = "stokes";
axisUnits_[a] = "stoke index";
axisMeasurementNames_[a] = "polarization";
}
else if (axisNames_[a].contains("SEQ.NUM."))
{
axisCoordSysNames_[a] = "sequence";
axisUnits_[a] = "sequence number";
axisMeasurementNames_[a] = "sequence";
}
else if (axisNames_[a].contains("CHANNEL"))
{
axisCoordSysNames_[a] = "channel index";
axisUnits_[a] = "channel number";
axisMeasurementNames_[a] = "channel";
}
else if (axisNames_[a].contains("TIME"))
{
axisCoordSysNames_[a] = "time";
axisUnits_[a] = "seconds";
axisMeasurementNames_[a] = "time";
}
else if (axisNames_[a].contains("BEAM"))
{
axisCoordSysNames_[a] = "beam";
axisUnits_[a] = "beam index";
axisMeasurementNames_[a] = "beam";
}
else
{
// don't know what to do with this axis
axisCoordSysNames_[a] = "";
axisUnits_[a] = "";
axisMeasurementNames_[a] = "";
}
#ifdef AVWCSDEBUG
#if 0
cout << "axis #" << a+1 << ", name = '" << axisNames_[a] << "', coord sys = '" <<
axisCoordSysNames_[a] << "'\n";
cout.flush();
#endif
#endif
}
}
if (longAxis_ >= 0)
{
if (projSystemName == "NCP")
{
double pprojps[10];
memset(pprojps, 0, 10*sizeof(double));
// map NCP to SIN
projSystemName = "SIN";
double obslat = crvals[latAxis_];
if (obslat == 0.0)
pprojps[1] = 1e50; // big number will suffice ??
else
pprojps[1] = 1.0/tan(M_PI*obslat/180.0);
//cout << "NCP-->SIN obslat =" << obslat << endl;
//cout << " pp0 is " << pprojps[0] << endl;
//cout << " pp1 is " << pprojps[1] << endl;
// Setup the celestial projection with altered projection parameters
cp_ = new AvCelestialProjection(projSystemName,
crvals[longAxis_],
crvals[latAxis_],
longpole_, 999.0,
pprojps);
}
else
{
// Setup the celestial projection
cp_ = new AvCelestialProjection(projSystemName,
crvals[longAxis_],
crvals[latAxis_],
longpole_, 999.0,
projps);
}
#ifdef AVWCSDEBUG
cout << "Contents of celprm struct:" << endl;
cp_.celprt();
}
else
{
cout << "Celestial Projection not found, using linear system only\n";
#endif
}
int i;
double * crpixsm1 = new double[nAxes_];
// subtract 1 because WCSLIB uses 1 offsets
for (i = 0; i < nAxes_; i++)
crpixsm1[i] = crpixs[i]-1;
lm_ = new AvLinearMap(crpixsm1,
cdelts,
pcmatrix,
nAxes_);
crvals_ = new double[nAxes_];
for (i = 0; i < nAxes_; i++)
{
crvals_[i] = crvals[i];
}
delete [] crpixsm1;
}
AvCoordinateSystem::~AvCoordinateSystem()
{
// ?? with this in, dies in _fini trying to delete a
// const string (go figure!)
if (lm_) delete lm_;
if (cp_) delete cp_;
delete [] crvals_;
delete [] axisNames_;
delete [] axisCoordSysNames_;
delete [] axisUnits_;
delete [] axisMeasurementNames_;
}
AvCoordinateSystem::AvCoordinateSystem(const AvCoordinateSystem& other)
: nAxes_(other.nAxes_),
cp_(0),
lm_(0),
crvals_(0),
longpole_(other.longpole_), longAxis_(-1), latAxis_(-1), axisNames_(0), axisCoordSysNames_(0), axisUnits_(0),
axisMeasurementNames_(0)
{
// forward to op =;
*this = other;
}
AvCoordinateSystem& AvCoordinateSystem::operator =(const AvCoordinateSystem& other)
{
if (this != &other)
{
// Clean up this class
if (cp_) delete cp_;
if (lm_) delete lm_;
if (crvals_) delete [] crvals_;
if (axisNames_) delete [] axisNames_;
if (axisCoordSysNames_) delete [] axisCoordSysNames_;
if (axisUnits_) delete [] axisUnits_;
if (axisMeasurementNames_) delete [] axisMeasurementNames_;
cp_ = NULL;
lm_ = NULL;
// copy values from other
nAxes_ = other.nAxes_;
if (other.cp_)
cp_ = new AvCelestialProjection(*other.cp_);
else
cp_ = other.cp_;
lm_ = new AvLinearMap(*other.lm_);
crvals_ = new double[nAxes_];
memcpy(crvals_, other.crvals_, nAxes_*sizeof(double));
longpole_ = other.longpole_;
longAxis_ = other.longAxis_;
latAxis_ = other.latAxis_;
axisNames_ = new AvString[nAxes_];
axisCoordSysNames_ = new AvString[nAxes_];
axisUnits_ = new AvString[nAxes_];
axisMeasurementNames_ = new AvString[nAxes_];
for (int r = 0; r < nAxes_; r++)
{
axisNames_[r] = other.axisNames_[r];
axisCoordSysNames_[r] = other.axisCoordSysNames_[r];
axisUnits_[r] = other.axisUnits_[r];
axisMeasurementNames_[r] = other.axisMeasurementNames_[r];
}
}
return *this;
}
int AvCoordinateSystem::world2ijk(const AvWPosition & world,
AvWPosition & ijk)
{
double d_world[16];
double d_ijk[16];
unsigned int i;
ijk.resize(world.nelements());
for (i = 0; i < world.nelements(); i++)
d_world[i] = world(i);
int retval = world2ijk(d_world, d_ijk);
for (i = 0; i < world.nelements(); i++)
ijk(i) = d_ijk[i];
return retval;
}
int AvCoordinateSystem::world2ijk(const double * world,
double * ijk)
{
double worldvals[16];
// apply crval offset to non-celestial coordinates
int i;
for (i = 0; i < nAxes_; i++)
{
if (i == longAxis_) continue;
if (i == latAxis_) continue;
worldvals[i] = world[i] - crvals_[i];
}
// map the celestial projection
if (cp_)
{
double lng = world[longAxis_];
double lat = world[latAxis_];
cp_->celestial2world(lng, lat, worldvals[longAxis_], worldvals[latAxis_]);
}
// then map them all linearly
lm_->world2pixel(worldvals, ijk);
return 1;
}
int AvCoordinateSystem::ijk2world(const AvWPosition & ijk,
AvWPosition & world)
{
double d_ijk[16];
double d_world[16];
unsigned int i;
world.resize(ijk.nelements());
for (i = 0; i < ijk.nelements(); i++)
d_ijk[i] = ijk(i);
int retval = ijk2world(d_ijk, d_world);
for (i = 0; i < ijk.nelements(); i++)
world(i) = d_world[i];
return retval;
}
// a.k.a pixel2celestial
int AvCoordinateSystem::ijk2world(const double * ijk,
double * world)
{
#ifdef AVWCSDEBUG
cout << "AvCS:i2w ijk = <" << ijk[0] << "," << ijk[1] << "," << ijk[2] << ">\n";
#endif
lm_->pixel2world(ijk, world);
if (cp_)
{
double x = world[longAxis_];
double y = world[latAxis_];
#ifdef AVWCSDEBUG
cout << "longAxis_ = " << longAxis_ << ", latAxis_ = " << latAxis_ << endl;
cout << "AvCS:x,y = " << x << "," << y << endl;
#endif
cp_->world2celestial(x,
y,
world[longAxis_],
world[latAxis_]);
#ifdef AVWCSDEBUG
cout << "AvCS:lng,lat = " << world[longAxis_] << "," << world[latAxis_] << endl;
#endif
}
// add the offset crvals for non-projection axes
int i;
for (i = 0; i < nAxes_; i++)
{
if (i == longAxis_) continue;
if (i == latAxis_) continue;
world[i] += crvals_[i];
}
#ifdef AVWCSDEBUG
cout << "AvCS:i2w world = <" << world[0] << "," << world[1] << "," << world[2] << ">\n";
#endif
return 1;
}
void AvCoordinateSystem::setAxisUnits(int axis,
const AvString& units,
const AvString& mname)
{
assert(axis>=0 && axis<nAxes_);
axisUnits_[axis] = units;
axisMeasurementNames_[axis] = mname;
}
AvString AvCoordinateSystem::valueUnitsStr(int axis,
double value,
int nsigfigs) const
{
assert(axis>=0 && axis<nAxes_);
return AvUnits::makeNiceString(value,
axisUnits_[axis],
nsigfigs,
axisMeasurementNames_[axis]);
}
double AvCoordinateSystem::valueInUnits(int axis,
double value,
const AvString& units) const
{
double retval = value;
assert(axis>=0 && axis<nAxes_);
AvUnits::convertValue(value,
axisUnits_[axis],
units,
retval,
axisMeasurementNames_[axis]);
return retval;
}