| 1 | //
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| 2 | // C++ Interface: PlotHelper
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| 3 | //
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| 4 | // Description:
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| 5 | //    A small helper class to handle direction coordinate in asapplotter
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| 6 | //
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| 7 | // Author: Kana Sugimoto <kana.sugi@nao.ac.jp>, (C) 2012
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| 8 | //
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| 9 | // Copyright: See COPYING file that comes with this distribution
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| 10 | //
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| 11 | //
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| 12 | 
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| 13 | // casacore
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| 14 | #include <casa/Arrays/Vector.h>
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| 15 | #include <casa/Quanta/Quantum.h>
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| 16 | #include <casa/Quanta/QuantumHolder.h>
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| 17 | #include <casa/Logging/LogIO.h>
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| 18 | 
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| 19 | #include <measures/Measures/MDirection.h>
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| 20 | #include <tables/Tables/TableRecord.h>
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| 21 | 
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| 22 | 
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| 23 | #include "PlotHelper.h"
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| 24 | 
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| 25 | //#ifndef KS_DEBUG
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| 26 | //#define KS_DEBUG
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| 27 | //#endif
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| 28 | 
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| 29 | using namespace std ;
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| 30 | using namespace casa ;
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| 31 | using namespace asap ;
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| 32 | 
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| 33 | namespace asap {
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| 34 | 
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| 35 | PlotHelper::PlotHelper() : dircoord_(0) 
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| 36 | {
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| 37 | #ifdef KS_DEBUG
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| 38 |   cout << "Default constructor nrow = " << data_p->nrow() << endl;
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| 39 | #endif
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| 40 | };
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| 41 | 
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| 42 | PlotHelper::PlotHelper( const ScantableWrapper &s) : dircoord_(0)
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| 43 | {
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| 44 | #ifdef KS_DEBUG
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| 45 |   cout << "Constructing PlotHelper with scantable wrapper" << endl;
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| 46 | #endif
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| 47 |   setScantable(s);
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| 48 | };
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| 49 | 
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| 50 | PlotHelper::~PlotHelper(){
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| 51 | #ifdef KS_DEBUG
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| 52 |   cout << "Called PlotHelper destructor" << endl;
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| 53 | #endif
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| 54 |   if (dircoord_){
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| 55 | #ifdef KS_DEBUG
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| 56 |     cout << "Destructing dircoord_" << endl;
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| 57 | #endif
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| 58 |     delete dircoord_;
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| 59 |     dircoord_ = 0;
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| 60 |   }
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| 61 | };
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| 62 | 
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| 63 | void PlotHelper::setScantable( const ScantableWrapper &s )
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| 64 | {
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| 65 | #ifdef KS_DEBUG
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| 66 |   cout << "Setting scantable" << endl;
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| 67 | #endif
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| 68 |   data_p = s.getCP();
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| 69 | };
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| 70 | 
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| 71 | 
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| 72 | DirectionCoordinate PlotHelper::getSTCoord(const int nx, const int ny,
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| 73 |                                            const Projection::Type ptype)
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| 74 | {
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| 75 |   LogIO os(LogOrigin("PlotHelper","getSTCoord()", WHERE));
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| 76 |   os << "Getting pointing information of the scantable." << LogIO::POST;
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| 77 |   if (data_p->nrow() < 1)
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| 78 |     throw AipsError("Scantable is not set. Please set a scantable first.");
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| 79 | 
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| 80 |   // First, generate rough direction coordinate.
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| 81 |   DirectionCoordinate coord;
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| 82 |   Double incx, incy;
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| 83 |   MDirection::Types mdt;
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| 84 |   ROArrayColumn<Double> dircol;
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| 85 |   Double xmax, xmin, ymax, ymin;
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| 86 |   Double centx, centy;
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| 87 |   Matrix<Double> xform(2,2);
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| 88 |   xform = 0.0;
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| 89 |   xform.diagonal() = 1.0;
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| 90 |   // Rough estimates of center and cell from scantable DIRECTIONs.
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| 91 |   dircol.attach( data_p->table(), "DIRECTION" );
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| 92 |   const Vector<String> udir = dircol.keywordSet().asArrayString("QuantumUnits");
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| 93 |   const Matrix<Double> direction = dircol.getColumn();
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| 94 |   minMax(xmin, xmax, direction.row(0));
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| 95 |   minMax(ymin, ymax, direction.row(1));
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| 96 |   if (!MDirection::getType(mdt, data_p->getDirectionRefString()))
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| 97 |     throw AipsError("Failed to get direction reference from scantable.");
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| 98 |   centx = 0.5 * (xmin + xmax);
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| 99 |   centy = 0.5 * (ymin + ymax);
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| 100 |   incx = abs(xmax - xmin) / (double) nx * cos(centy);
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| 101 |   incy = abs(ymax - ymin) / (double) ny;
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| 102 |   // Generate a temporal direction coordinte
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| 103 |   coord = DirectionCoordinate(mdt, ptype,
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| 104 |                                 centx, centy, incx, incy, xform,
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| 105 |                                 0.5*Double(nx), 0.5*Double(ny));
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| 106 |   coord.setWorldAxisUnits(udir);
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| 107 | #ifdef KS_DEBUG
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| 108 |   {//Debug outputs
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| 109 |     cout << "Generated a temporal direction coordinate of a scantable: " << endl;
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| 110 |     Vector<String> units = coord.worldAxisUnits();
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| 111 |     Vector<Double> refv = coord.referenceValue();
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| 112 |     cout <<"- Reference: " << MDirection::showType(coord.directionType()) << " " << refv[0] << units[0] << " " << refv[1] << units[1]  << endl;
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| 113 |     Vector<Double> refpix = coord.referencePixel();
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| 114 |     cout <<"- Reference Pixel: [" << refpix[0] << ", " << refpix[1] << "]" << endl;
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| 115 |     Vector<Double> inc = coord.increment();
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| 116 |     cout <<"- Increments: [" << inc[0] << ", " << inc[1] << "]" << endl;
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| 117 |     cout <<"- Projection: " << coord.projection().name() << endl;
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| 118 |   }
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| 119 | #endif
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| 120 |   return coord;
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| 121 | }
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| 122 | 
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| 123 | void PlotHelper::setGridParam(const int nx, const int ny,
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| 124 |                               const string cellx, const string celly,
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| 125 |                               string center, const string projname)
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| 126 | {
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| 127 |   LogIO os(LogOrigin("PlotHelper","setGridParam()", WHERE));
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| 128 |   // Value check of nx and ny
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| 129 |   if (nx < 1)
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| 130 |     throw(AipsError("nx should be > 0"));
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| 131 |   if (ny < 1)
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| 132 |     throw(AipsError("ny should be > 0"));
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| 133 |   // Destroy old coord
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| 134 |   if (dircoord_){
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| 135 | #ifdef KS_DEBUG
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| 136 |     cout << "Destructing dircoord_" << endl;
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| 137 | #endif
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| 138 |     delete dircoord_;
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| 139 |     dircoord_ = 0;
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| 140 |   }
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| 141 | 
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| 142 |   // Check for availability of data_p
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| 143 |   const bool stset = ((data_p->nrow() > 0) ? true : false);
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| 144 |   const bool needst = center.empty() || (cellx.empty() && celly.empty());
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| 145 |   if (needst && !stset)
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| 146 |     throw AipsError("Could not resolve grid parameters. Please set a scantable first.");
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| 147 | 
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| 148 |   // projection
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| 149 |   Projection::Type projtype(Projection::type(String(projname)));
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| 150 | 
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| 151 |   // Calculate projected map center (in world coordinate)
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| 152 |   // and extent (in pixel coordinate) from scantable DIRECIONs (if necessary).
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| 153 |   MDirection stcent;
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| 154 |   Double stxmax, stxmin, stymax, stymin;
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| 155 |   MDirection::Types stdt;
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| 156 |   DirectionCoordinate stcoord;
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| 157 |   Quantum<Double> stincx, stincy;
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| 158 |   if (needst && stset) {
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| 159 |     stcoord = getSTCoord(nx, ny, projtype);
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| 160 |     Vector<Double> inc = stcoord.increment();
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| 161 |     Vector<String> units = stcoord.worldAxisUnits();
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| 162 |     stincx = Quantum<Double>(inc[0], units[0]);
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| 163 |     stincy = Quantum<Double>(inc[1], units[0]);
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| 164 |     stdt = stcoord.directionType();
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| 165 |     // Get the extent of directions in Pixel coordinate
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| 166 |     ROArrayColumn<Double> dircol;
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| 167 |     dircol.attach( data_p->table(), "DIRECTION" );
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| 168 |     const Matrix<Double> direction = dircol.getColumn();
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| 169 |     Matrix<Double> dirpix;
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| 170 |     Vector<Bool> failures;
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| 171 |     if (!stcoord.toPixelMany(dirpix, direction, failures))
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| 172 |       throw AipsError("Failed to get directions in pixel coordinate.");
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| 173 |     minMax(stxmin, stxmax, dirpix.row(0));
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| 174 |     minMax(stymin, stymax, dirpix.row(1));
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| 175 |     // Get the direction center in World coordinate.
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| 176 |     Vector<Double> centpix(2);
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| 177 |     centpix[0] = 0.5 * (stxmin + stxmax);
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| 178 |     centpix[1] = 0.5 * (stymin + stymax);
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| 179 |     stcoord.toWorld(stcent, centpix);
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| 180 | #ifdef KS_DEBUG
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| 181 |     {//Debug output
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| 182 |       Quantum< Vector<Double> > qcent;
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| 183 |       cout << "Got the center and map extent of scantable." << endl;
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| 184 |       qcent = stcent.getAngle();
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| 185 |       cout << "- Center of DIRECTIONs: " << stcent.getRefString() << " "
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| 186 |            << qcent.getValue()[0] << qcent.getUnit() << " "
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| 187 |            << qcent.getValue()[1] << qcent.getUnit() << endl;
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| 188 |       cout << "- Map extent: [" << (stxmax-stxmin)*stincx.getValue() << ", "
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| 189 |            << (stymax-stymin)*stincy.getValue() << "] ( " << stincx.getUnit() << ")" << endl;
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| 190 |     }
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| 191 | #endif
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| 192 |   }
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| 193 | 
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| 194 |   os << "Setting grid parameters" << LogIO::POST;
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| 195 |   // Now, define direction coordinate from input parameters (in radian)
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| 196 |   Double incx, incy;
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| 197 |   Double centx, centy;
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| 198 |   MDirection::Types mdt;
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| 199 |   // center
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| 200 |   if (center.empty()){
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| 201 |     os << "center is not specified. Using pointing center of the scantable." << LogIO::POST;
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| 202 |     if (!stset)
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| 203 |       throw AipsError("Scantable is not set. Could not resolve map center.");
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| 204 | 
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| 205 |     centx = stcent.getAngle("rad").getValue()[0];
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| 206 |     centy = stcent.getAngle("rad").getValue()[1];
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| 207 |     mdt = stdt;
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| 208 |   } else {
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| 209 |     os << "Using user defined center" << LogIO::POST;
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| 210 |     // Parse center string
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| 211 |     string::size_type pos0 = center.find(" ");
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| 212 |     
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| 213 |     if (pos0 == string::npos)
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| 214 |       throw AipsError("bad string format in center direction");
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| 215 | 
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| 216 |     string::size_type pos1 = center.find(" ", pos0+1);
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| 217 |     String sepoch, sra, sdec;
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| 218 |     if (pos1 != string::npos) {
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| 219 |       sepoch = center.substr(0, pos0);
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| 220 |       sra = center.substr(pos0+1, pos1-pos0);
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| 221 |       sdec = center.substr(pos1+1);
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| 222 |     } else {
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| 223 |       sepoch = "J2000";
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| 224 |       sra = center.substr(0, pos0);
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| 225 |       sdec = center.substr(pos0+1);
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| 226 |     }
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| 227 |     if (!MDirection::getType(mdt,sepoch))
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| 228 |       throw AipsError("Invalid direction reference in center");
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| 229 |     if (stset && (mdt != stdt))
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| 230 |       throw AipsError("Direction reference of center should be the same as input scantable");
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| 231 |     QuantumHolder qh ;
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| 232 |     String err ;
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| 233 |     qh.fromString(err, sra);
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| 234 |     Quantum<Double> ra  = qh.asQuantumDouble();
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| 235 |     qh.fromString(err, sdec) ;
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| 236 |     Quantum<Double> dec = qh.asQuantumDouble();
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| 237 |     centx = ra.getValue("rad");
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| 238 |     centy = dec.getValue("rad");
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| 239 |     // rotaion
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| 240 |     if (stset) {
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| 241 |       Double stcentx = stcent.getAngle("rad").getValue()[0];
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| 242 |       Double rotnum = round( abs(centx - stcentx) / (C::_2pi) );
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| 243 |       if (centx < stcentx) rotnum *= -1;
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| 244 |       centx -= (rotnum * C::_2pi);
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| 245 |     }
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| 246 |   }
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| 247 |   os << "Grid center: ( "  << centx  << " rad , " << centy << " rad ) " << LogIO::POST;
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| 248 | 
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| 249 |   // cell
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| 250 |   if (cellx.empty() && celly.empty()){
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| 251 |     os << "cell size is not specified. Using cell size to cover all pointings in the scantable." << LogIO::POST;
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| 252 |     if (!stset)
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| 253 |       throw AipsError("Scantable is not set. Could not resolve cell size.");
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| 254 | 
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| 255 |     Vector<Double> centpix;
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| 256 |     MDirection centmd = MDirection(Quantum<Double>(centx, "rad"),
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| 257 |                                    Quantum<Double>(centy, "rad"), mdt);
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| 258 |     stcoord.toPixel(centpix, centmd);
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| 259 | #ifdef KS_DEBUG
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| 260 |     cout << "- got centpix [" << centpix[0] << ", " << centpix[1] << "]" <<endl;
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| 261 | #endif
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| 262 |     Double wx = max( abs(stxmax-centpix[0]), abs(stxmin-centpix[0]) )
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| 263 |       * 2 * stincx.getValue("rad");
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| 264 |     Double wy = max( abs(stymax-centpix[1]), abs(stymin-centpix[1]) )
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| 265 |       * 2 * stincy.getValue("rad");
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| 266 |     incx = wx / max(nx - 1., 1.);
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| 267 |     incy = wy / max(ny - 1., 1.);
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| 268 |   } else {
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| 269 |     os << "Using user defined cell size" << LogIO::POST;
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| 270 |     Quantum<Double> qcellx, qcelly;
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| 271 |     if (!cellx.empty() && !celly.empty()){
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| 272 |       readQuantity(qcellx, String(cellx));
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| 273 |       readQuantity(qcelly, String(celly));
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| 274 |     } else if (celly.empty()) {
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| 275 |       readQuantity(qcellx, String(cellx));
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| 276 |       qcelly = qcellx;
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| 277 |     } else { //only celly is defined
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| 278 |       readQuantity(qcelly, String(celly));
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| 279 |       qcellx = qcelly;
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| 280 |     }
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| 281 |     incx = qcellx.getValue("rad");
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| 282 |     incy = qcelly.getValue("rad");
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| 283 |   }
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| 284 |   // inc should be negative to transpose plot
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| 285 |   incx = -abs(incx);
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| 286 |   incy = -abs(incy);
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| 287 | 
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| 288 |   os << "Spacing: ( " << abs(incx) << " rad , " << abs(incy) << " rad )" <<endl;
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| 289 | 
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| 290 |   Matrix<Double> xform(2,2) ;
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| 291 |   xform = 0.0 ;
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| 292 |   xform.diagonal() = 1.0 ;
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| 293 |   dircoord_ = new DirectionCoordinate(mdt, projtype,
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| 294 |                                       centx, centy, incx, incy,
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| 295 |                                       xform,
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| 296 |                                       0.5*Double(nx), 
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| 297 |                                       0.5*Double(ny)) ; // pixel at center
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| 298 |   {//Summary
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| 299 |     os << "Successfully generated grid coordinate:" << LogIO::POST;
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| 300 |     Vector<String> units = dircoord_->worldAxisUnits();
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| 301 |     Vector<Double> refv = dircoord_->referenceValue();
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| 302 |     os <<"- Reference Direction : " << MDirection::showType(dircoord_->directionType())
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| 303 |        << " " << refv[0] << units[0] << " " << refv[1] << units[1]  << LogIO::POST;
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| 304 |     Vector<Double> refpix = dircoord_->referencePixel();
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| 305 |     os <<"- Reference Pixel     : [" << refpix[0] << ", " << refpix[1] << "]" << LogIO::POST;
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| 306 |     Vector<Double> inc = dircoord_->increment();
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| 307 |     os <<"- Increments          : [" << inc[0] << ", " << inc[1] << "]" << LogIO::POST;
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| 308 |     os <<"- Projection Type     : " << dircoord_->projection().name() << LogIO::POST;
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| 309 |   }
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| 310 | };
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| 311 | 
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| 312 | void PlotHelper::setGridParamVal(const int nx, const int ny,
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| 313 |                                  const double cellx, const double celly,
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| 314 |                                  const double centx, const double centy,
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| 315 |                                  const string epoch, const string projname){
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| 316 |   LogIO os(LogOrigin("PlotHelper","setGridParamVal()", WHERE));
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| 317 |   // Value check of nx and ny
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| 318 |   if (nx < 1)
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| 319 |     throw(AipsError("nx should be > 0"));
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| 320 |   if (ny < 1)
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| 321 |     throw(AipsError("ny should be > 0"));
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| 322 |   // Destroy old coord
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| 323 |   if (dircoord_){
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| 324 | #ifdef KS_DEBUG
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| 325 |     cout << "Destructing dircoord_" << endl;
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| 326 | #endif
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| 327 |     delete dircoord_;
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| 328 |     dircoord_ = 0;
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| 329 |   }
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| 330 | 
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| 331 |   // center (in rad)
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| 332 |   Double centX(centx), centY(centy);
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| 333 |   // cell size (in rad)
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| 334 |   Double incX(cellx), incY(celly);
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| 335 |   // epoch
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| 336 |   MDirection::Types mdt;
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| 337 |   MDirection::getType(mdt, String(epoch));
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| 338 |   // projection
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| 339 |   Projection::Type projType(Projection::type(String(projname)));
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| 340 | 
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| 341 |   Matrix<Double> xform(2,2) ;
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| 342 |   xform = 0.0 ;
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| 343 |   xform.diagonal() = 1.0 ;
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| 344 |   dircoord_ = new DirectionCoordinate(mdt, projType,
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| 345 |                                       centX, centY, incX, incY,
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| 346 |                                       xform,
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| 347 |                                       0.5*Double(nx), 
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| 348 |                                       0.5*Double(ny)) ; // pixel at center
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| 349 | //                                    0.5*Double(nx-1), 
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| 350 | //                                    0.5*Double(ny-1)) ; // pixel at grid
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| 351 |   {//Summary
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| 352 |     os << "Successfully generated grid coordinate:" << LogIO::POST;
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| 353 |     Vector<String> units = dircoord_->worldAxisUnits();
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| 354 |     Vector<Double> refv = dircoord_->referenceValue();
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| 355 |     os <<"- Reference Direction : " << MDirection::showType(dircoord_->directionType())
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| 356 |        << " " << refv[0] << units[0] << " " << refv[1] << units[1]  << LogIO::POST;
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| 357 |     Vector<Double> refpix = dircoord_->referencePixel();
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| 358 |     os <<"- Reference Pixel     : [" << refpix[0] << ", " << refpix[1] << "]" << LogIO::POST;
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| 359 |     Vector<Double> inc = dircoord_->increment();
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| 360 |     os <<"- Increments          : [" << inc[0] << ", " << inc[1] << "]" << LogIO::POST;
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| 361 |     os <<"- Projection Type     : " << dircoord_->projection().name() << LogIO::POST;
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| 362 |   }
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| 363 | };
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| 364 | 
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| 365 | vector<double>  PlotHelper::getGridPixel(const int whichrow){
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| 366 |   if (data_p->nrow() < 1)
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| 367 |     throw AipsError("Scantable is not set. Could not get direction.");
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| 368 |   else if (whichrow > int(data_p->nrow()) - 1)
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| 369 |     throw AipsError("Row index out of range.");
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| 370 |   if (!dircoord_)
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| 371 |     throw AipsError("Direction coordinate is not defined.");
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| 372 | 
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| 373 |   Vector<Double> pixel;
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| 374 |   MDirection world;
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| 375 |   vector<double> outvec;
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| 376 |   world = data_p->getDirection(whichrow);
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| 377 | #ifdef KS_DEBUG
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| 378 |   cout << "searching pixel position (world = " << data_p->getDirectionString(whichrow) << " = [" << world.getAngle("rad").getValue()[0] << ", " << world.getAngle("rad").getValue()[1] << "])" << endl;
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| 379 | #endif
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| 380 |   dircoord_->toPixel(pixel, world);
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| 381 | #ifdef KS_DEBUG
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| 382 |   cout << "got pixel = [" << pixel[0] << ", " << pixel[1] << "]" << endl;
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| 383 | #endif
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| 384 |   // convert pixel to std vector
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| 385 |   pixel.tovector(outvec);
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| 386 |   return outvec;
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| 387 | };
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| 388 | 
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| 389 | } //namespace asap
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