| 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/Quanta/MVAngle.h>
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| 18 | #include <casa/Logging/LogIO.h>
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| 19 |
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| 20 | #include <measures/Measures/MDirection.h>
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| 21 | #include <tables/Tables/TableRecord.h>
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| 22 |
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| 23 |
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| 24 | #include "PlotHelper.h"
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| 25 |
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| 26 | #define SMALL_ANGLE 1.0e-7
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| 27 |
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| 28 | // #ifndef KS_DEBUG
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| 29 | // #define KS_DEBUG
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| 30 | // #endif
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| 31 |
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| 32 | using namespace std ;
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| 33 | using namespace casa ;
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| 34 | using namespace asap ;
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| 35 |
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| 36 | namespace asap {
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| 37 |
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| 38 | PlotHelper::PlotHelper() : dircoord_p(0)
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| 39 | {
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| 40 | #ifdef KS_DEBUG
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| 41 | cout << "Default constructor nrow = " << data_p->nrow() << endl;
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| 42 | #endif
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| 43 | };
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| 44 |
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| 45 | PlotHelper::PlotHelper( const ScantableWrapper &s) : dircoord_p(0)
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| 46 | {
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| 47 | #ifdef KS_DEBUG
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| 48 | cout << "Constructing PlotHelper with scantable wrapper" << endl;
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| 49 | #endif
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| 50 | setScantable(s);
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| 51 | };
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| 52 |
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| 53 | PlotHelper::~PlotHelper(){
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| 54 | #ifdef KS_DEBUG
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| 55 | cout << "Called PlotHelper destructor" << endl;
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| 56 | #endif
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| 57 | if (dircoord_p){
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| 58 | #ifdef KS_DEBUG
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| 59 | cout << "Destructing dircoord_p" << endl;
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| 60 | #endif
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| 61 | delete dircoord_p;
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| 62 | dircoord_p = 0;
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| 63 | }
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| 64 | };
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| 65 |
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| 66 | void PlotHelper::setScantable( const ScantableWrapper &s )
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| 67 | {
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| 68 | #ifdef KS_DEBUG
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| 69 | cout << "Setting scantable" << endl;
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| 70 | #endif
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| 71 | data_p = s.getCP();
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| 72 | };
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| 73 |
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| 74 |
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| 75 | DirectionCoordinate PlotHelper::getSTCoord(const int nx, const int ny,
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| 76 | const Projection::Type ptype)
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| 77 | {
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| 78 | LogIO os(LogOrigin("PlotHelper","getSTCoord()", WHERE));
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| 79 | os << "Getting pointing information of the scantable." << LogIO::POST;
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| 80 | if (data_p->nrow() < 1)
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| 81 | throw AipsError("Scantable is not set. Please set a scantable first.");
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| 82 |
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| 83 | // First, generate rough direction coordinate.
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| 84 | DirectionCoordinate coord;
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| 85 | Double incx, incy;
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| 86 | MDirection::Types mdt;
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| 87 | ROArrayColumn<Double> dircol;
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| 88 | Double xmax, xmin, ymax, ymin;
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| 89 | Double centx, centy;
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| 90 | Matrix<Double> xform(2,2);
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| 91 | xform = 0.0;
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| 92 | xform.diagonal() = 1.0;
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| 93 | // Rough estimates of center and cell from scantable DIRECTIONs.
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| 94 | dircol.attach( data_p->table(), "DIRECTION" );
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| 95 | const Vector<String> udir = dircol.keywordSet().asArrayString("QuantumUnits");
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| 96 | const Matrix<Double> direction = dircol.getColumn();
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| 97 | minMax(xmin, xmax, direction.row(0));
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| 98 | minMax(ymin, ymax, direction.row(1));
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| 99 | if (!MDirection::getType(mdt, data_p->getDirectionRefString()))
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| 100 | throw AipsError("Failed to get direction reference from scantable.");
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| 101 | centx = 0.5 * (xmin + xmax);
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| 102 | centy = 0.5 * (ymin + ymax);
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| 103 | incx = abs(xmax - xmin) / (double) nx * cos(centy);
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| 104 | incy = abs(ymax - ymin) / (double) ny;
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| 105 | // Direction coordinate seems not work well with inc=0. set very small value.
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| 106 | if (incx == 0.) incx = SMALL_ANGLE;
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| 107 | if (incy == 0.) incy = SMALL_ANGLE;
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| 108 | // Generate a temporal direction coordinte
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| 109 | coord = DirectionCoordinate(mdt, ptype,
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| 110 | centx, centy, incx, incy, xform,
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| 111 | 0.5*Double(nx), 0.5*Double(ny));
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| 112 | coord.setWorldAxisUnits(udir);
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| 113 | #ifdef KS_DEBUG
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| 114 | {//Debug outputs
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| 115 | cout << "Generated a temporal direction coordinate of a scantable: " << endl;
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| 116 | Vector<String> units = coord.worldAxisUnits();
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| 117 | Vector<Double> refv = coord.referenceValue();
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| 118 | cout <<"- Reference: " << MDirection::showType(coord.directionType()) << " " << refv[0] << units[0] << " " << refv[1] << units[1] << endl;
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| 119 | Vector<Double> refpix = coord.referencePixel();
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| 120 | cout <<"- Reference Pixel: [" << refpix[0] << ", " << refpix[1] << "]" << endl;
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| 121 | Vector<Double> inc = coord.increment();
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| 122 | cout <<"- Increments: [" << inc[0] << ", " << inc[1] << "]" << endl;
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| 123 | cout <<"- Projection: " << coord.projection().name() << endl;
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| 124 | }
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| 125 | #endif
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| 126 | return coord;
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| 127 | }
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| 128 |
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| 129 | void PlotHelper::setGridParam(const int nx, const int ny,
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| 130 | const string cellx, const string celly,
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| 131 | string center, const string projname)
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| 132 | {
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| 133 | LogIO os(LogOrigin("PlotHelper","setGridParam()", WHERE));
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| 134 | // Value check of nx and ny
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| 135 | if (nx < 1)
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| 136 | throw(AipsError("nx should be > 0"));
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| 137 | if (ny < 1)
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| 138 | throw(AipsError("ny should be > 0"));
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| 139 | // Destroy old coord
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| 140 | if (dircoord_p){
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| 141 | #ifdef KS_DEBUG
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| 142 | cout << "Destructing old dircoord_p" << endl;
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| 143 | #endif
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| 144 | delete dircoord_p;
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| 145 | dircoord_p = 0;
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| 146 | }
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| 147 |
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| 148 | // Check for availability of data_p
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| 149 | const bool stset = ((data_p->nrow() > 0) ? true : false);
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| 150 | const bool needst = center.empty() || (cellx.empty() && celly.empty());
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| 151 | if (needst && !stset)
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| 152 | throw AipsError("Could not resolve grid parameters. Please set a scantable first.");
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| 153 |
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| 154 | // projection
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| 155 | Projection::Type projtype(Projection::type(String(projname)));
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| 156 |
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| 157 | // Calculate projected map center (in world coordinate)
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| 158 | // and extent (in pixel coordinate) from scantable DIRECIONs (if necessary).
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| 159 | MDirection stcent;
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| 160 | Double stxmax, stxmin, stymax, stymin;
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| 161 | MDirection::Types stdt;
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| 162 | DirectionCoordinate stcoord;
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| 163 | Quantum<Double> stincx, stincy;
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| 164 | if (needst && stset) {
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| 165 | stcoord = getSTCoord(nx, ny, projtype);
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| 166 | Vector<Double> inc = stcoord.increment();
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| 167 | Vector<String> units = stcoord.worldAxisUnits();
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| 168 | stincx = Quantum<Double>(inc[0], units[0]);
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| 169 | stincy = Quantum<Double>(inc[1], units[0]);
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| 170 | stdt = stcoord.directionType();
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| 171 | // Get the extent of directions in Pixel coordinate
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| 172 | ROArrayColumn<Double> dircol;
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| 173 | dircol.attach( data_p->table(), "DIRECTION" );
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| 174 | const Matrix<Double> direction = dircol.getColumn();
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| 175 | Matrix<Double> dirpix;
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| 176 | Vector<Bool> failures;
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| 177 | if (!stcoord.toPixelMany(dirpix, direction, failures))
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| 178 | throw AipsError("Failed to get directions in pixel coordinate.");
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| 179 | minMax(stxmin, stxmax, dirpix.row(0));
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| 180 | minMax(stymin, stymax, dirpix.row(1));
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| 181 | // Get the direction center in World coordinate.
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| 182 | Vector<Double> centpix(2);
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| 183 | centpix[0] = 0.5 * (stxmin + stxmax);
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| 184 | centpix[1] = 0.5 * (stymin + stymax);
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| 185 | stcoord.toWorld(stcent, centpix);
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| 186 | #ifdef KS_DEBUG
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| 187 | {//Debug output
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| 188 | Quantum< Vector<Double> > qcent;
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| 189 | cout << "Got the center and map extent of scantable." << endl;
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| 190 | qcent = stcent.getAngle();
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| 191 | cout << "- Center of DIRECTIONs: " << stcent.getRefString() << " "
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| 192 | << qcent.getValue()[0] << qcent.getUnit() << " "
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| 193 | << qcent.getValue()[1] << qcent.getUnit() << endl;
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| 194 | cout << "- Map extent: [" << (stxmax-stxmin)*stincx.getValue() << ", "
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| 195 | << (stymax-stymin)*stincy.getValue() << "] ( " << stincx.getUnit() << ")" << endl;
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| 196 | }
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| 197 | #endif
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| 198 | }
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| 199 |
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| 200 | os << "Setting grid parameters" << LogIO::POST;
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| 201 | // Now, define direction coordinate from input parameters (in radian)
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| 202 | Double incx, incy;
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| 203 | Double centx, centy;
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| 204 | MDirection::Types mdt;
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| 205 | // center
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| 206 | if (center.empty()){
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| 207 | os << "center is not specified. Using pointing center of the scantable." << LogIO::POST;
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| 208 | if (!stset)
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| 209 | throw AipsError("Scantable is not set. Could not resolve map center.");
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| 210 |
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| 211 | centx = stcent.getAngle("rad").getValue()[0];
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| 212 | centy = stcent.getAngle("rad").getValue()[1];
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| 213 | mdt = stdt;
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| 214 | } else {
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| 215 | os << "Using user defined center" << LogIO::POST;
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| 216 | // Parse center string
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| 217 | string::size_type pos0 = center.find(" ");
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| 218 |
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| 219 | if (pos0 == string::npos)
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| 220 | throw AipsError("bad string format in center direction");
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| 221 |
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| 222 | string::size_type pos1 = center.find(" ", pos0+1);
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| 223 | String sepoch, sra, sdec;
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| 224 | if (pos1 != string::npos) {
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| 225 | sepoch = center.substr(0, pos0);
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| 226 | sra = center.substr(pos0+1, pos1-pos0);
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| 227 | sdec = center.substr(pos1+1);
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| 228 | } else {
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| 229 | sepoch = "J2000";
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| 230 | sra = center.substr(0, pos0);
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| 231 | sdec = center.substr(pos0+1);
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| 232 | }
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| 233 | if (!MDirection::getType(mdt,sepoch))
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| 234 | throw AipsError("Invalid direction reference in center");
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| 235 | if (stset){
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| 236 | if ( !needst &&
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| 237 | !MDirection::getType( stdt, data_p->getDirectionRefString() ) )
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| 238 | throw AipsError("Failed to get direction reference from scantable.");
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| 239 | if (mdt != stdt)
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| 240 | throw AipsError("Direction reference of center should be the same as input scantable");
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| 241 | }
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| 242 | QuantumHolder qh ;
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| 243 | String err ;
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| 244 | qh.fromString(err, sra);
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| 245 | Quantum<Double> ra = qh.asQuantumDouble();
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| 246 | qh.fromString(err, sdec) ;
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| 247 | Quantum<Double> dec = qh.asQuantumDouble();
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| 248 | centx = ra.getValue("rad");
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| 249 | centy = dec.getValue("rad");
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| 250 | // rotaion
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| 251 | if (stset) {
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| 252 | Double stcentx = stcent.getAngle("rad").getValue()[0];
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| 253 | Double rotnum = round( abs(centx - stcentx) / (C::_2pi) );
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| 254 | if (centx < stcentx) rotnum *= -1;
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| 255 | centx -= (rotnum * C::_2pi);
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| 256 | }
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| 257 | }
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| 258 | os << "Grid center: ( " << centx << " rad , " << centy << " rad ) " << LogIO::POST;
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| 259 |
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| 260 | // cell
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| 261 | if (cellx.empty() && celly.empty()){
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| 262 | os << "cell size is not specified. Using cell size to cover all pointings in the scantable." << LogIO::POST;
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| 263 | if (!stset)
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| 264 | throw AipsError("Scantable is not set. Could not resolve cell size.");
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| 265 |
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| 266 | Vector<Double> centpix;
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| 267 | MDirection centmd = MDirection(Quantum<Double>(centx, "rad"),
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| 268 | Quantum<Double>(centy, "rad"), mdt);
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| 269 | stcoord.toPixel(centpix, centmd);
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| 270 | #ifdef KS_DEBUG
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| 271 | cout << "- got centpix [" << centpix[0] << ", " << centpix[1] << "]" <<endl;
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| 272 | #endif
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| 273 | // Direction coordinate seems not work well with inc=0. set very small value.
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| 274 | Double wx = max( max( abs(stxmax-centpix[0]), abs(stxmin-centpix[0]) ), 0.5 )
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| 275 | * 2 * stincx.getValue("rad");
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| 276 | Double wy = max( max( abs(stymax-centpix[1]), abs(stymin-centpix[1]) ), 0.5 )
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| 277 | * 2 * stincy.getValue("rad");
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| 278 | incx = wx / max(nx - 1., 1.);
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| 279 | incy = wy / max(ny - 1., 1.);
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| 280 | } else {
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| 281 | os << "Using user defined cell size" << LogIO::POST;
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| 282 | Quantum<Double> qcellx, qcelly;
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| 283 | if (!cellx.empty() && !celly.empty()){
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| 284 | readQuantity(qcellx, String(cellx));
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| 285 | readQuantity(qcelly, String(celly));
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| 286 | } else if (celly.empty()) {
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| 287 | readQuantity(qcellx, String(cellx));
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| 288 | qcelly = qcellx;
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| 289 | } else { //only celly is defined
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| 290 | readQuantity(qcelly, String(celly));
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| 291 | qcellx = qcelly;
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| 292 | }
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| 293 | incx = qcellx.getValue("rad");
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| 294 | incy = qcelly.getValue("rad");
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| 295 | }
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| 296 | // inc should be negative to transpose plot
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| 297 | incx = -abs(incx);
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| 298 | incy = -abs(incy);
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| 299 |
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| 300 | os << "Spacing: ( " << abs(incx) << " rad , " << abs(incy) << " rad )" <<endl;
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| 301 |
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| 302 | setupCoord(mdt, projtype, centx, centy, incx, incy,
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| 303 | 0.5*Double(nx), 0.5*Double(ny)) ; // pixel at center)
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| 304 |
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| 305 | };
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| 306 |
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| 307 | void PlotHelper::setGridParamVal(const int nx, const int ny,
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| 308 | const double cellx, const double celly,
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| 309 | const double centx, const double centy,
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| 310 | const string epoch, const string projname){
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| 311 | LogIO os(LogOrigin("PlotHelper","setGridParamVal()", WHERE));
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| 312 | // Value check of nx and ny
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| 313 | if (nx < 1)
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| 314 | throw(AipsError("nx should be > 0"));
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| 315 | if (ny < 1)
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| 316 | throw(AipsError("ny should be > 0"));
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| 317 | // Destroy old coord
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| 318 | if (dircoord_p){
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| 319 | #ifdef KS_DEBUG
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| 320 | cout << "Destructing old dircoord_p" << endl;
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| 321 | #endif
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| 322 | delete dircoord_p;
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| 323 | dircoord_p = 0;
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| 324 | }
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| 325 |
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| 326 | // center (in rad)
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| 327 | Double centX(centx), centY(centy);
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| 328 | // cell size (in rad)
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| 329 | Double incX(cellx), incY(celly);
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| 330 | // epoch
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| 331 | MDirection::Types mdt;
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| 332 | MDirection::getType(mdt, String(epoch));
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| 333 | // projection
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| 334 | Projection::Type projType(Projection::type(String(projname)));
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| 335 |
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| 336 | setupCoord(mdt, projType, centX, centY, incX, incY,
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| 337 | 0.5*Double(nx), 0.5*Double(ny)) ; // pixel at center
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| 338 | // 0.5*Double(nx-1), 0.5*Double(ny-1)) ; // pixel at grid
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| 339 |
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| 340 | };
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| 341 |
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| 342 |
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| 343 | void PlotHelper::setupCoord(const MDirection::Types mdt,
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| 344 | const Projection::Type pjt,
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| 345 | const Double centx, const Double centy,
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| 346 | const Double incx, const Double incy,
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| 347 | const Double refx, const Double refy)
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| 348 | {
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| 349 | LogIO os(LogOrigin("PlotHelper","setupCoord()", WHERE));
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| 350 | // Destroy old coord
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| 351 | if (dircoord_p){
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| 352 | #ifdef KS_DEBUG
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| 353 | cout << "Destructing old dircoord_p" << endl;
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| 354 | #endif
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| 355 | delete dircoord_p;
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| 356 | dircoord_p = 0;
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| 357 | }
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| 358 |
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| 359 | Matrix<Double> xform(2,2) ;
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| 360 | xform = 0.0 ;
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| 361 | xform.diagonal() = 1.0 ;
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| 362 | dircoord_p = new DirectionCoordinate(mdt, pjt, centx, centy, incx, incy,
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| 363 | xform, refx, refy);
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| 364 | {//Summary
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| 365 | os << "Successfully generated grid coordinate:" << LogIO::POST;
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| 366 | Vector<String> units = dircoord_p->worldAxisUnits();
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| 367 | Vector<Double> refv = dircoord_p->referenceValue();
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| 368 | os <<"- Reference Direction : "
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| 369 | << MDirection::showType(dircoord_p->directionType())
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| 370 | << " " << refv[0] << units[0] << " " << refv[1] << units[1] << LogIO::POST;
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| 371 | Vector<Double> refpix = dircoord_p->referencePixel();
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| 372 | os <<"- Reference Pixel : [" << refpix[0] << ", " << refpix[1] << "]" << LogIO::POST;
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| 373 | Vector<Double> inc = dircoord_p->increment();
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| 374 | os <<"- Increments : [" << inc[0] << ", " << inc[1] << "]" << LogIO::POST;
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| 375 | os <<"- Projection Type : " << dircoord_p->projection().name() << LogIO::POST;
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| 376 | }
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| 377 | };
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| 378 |
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| 379 | vector<double> PlotHelper::getGridPixel(const int whichrow)
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| 380 | {
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| 381 | if (data_p->nrow() < 1)
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| 382 | throw AipsError("Scantable is not set. Could not get direction.");
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| 383 | else if (whichrow > int(data_p->nrow()) - 1)
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| 384 | throw AipsError("Row index out of range.");
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| 385 | if (!dircoord_p)
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| 386 | throw AipsError("Direction coordinate is not defined.");
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| 387 |
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| 388 | Vector<Double> pixel;
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| 389 | MDirection world;
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| 390 | vector<double> outvec;
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| 391 | world = data_p->getDirection(whichrow);
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| 392 | #ifdef KS_DEBUG
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| 393 | cout << "searching pixel position (world = " << data_p->getDirectionString(whichrow) << " = [" << world.getAngle("rad").getValue()[0] << ", " << world.getAngle("rad").getValue()[1] << "])" << endl;
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| 394 | #endif
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| 395 | dircoord_p->toPixel(pixel, world);
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| 396 | #ifdef KS_DEBUG
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| 397 | cout << "got pixel = [" << pixel[0] << ", " << pixel[1] << "]" << endl;
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| 398 | #endif
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| 399 | // convert pixel to std vector
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| 400 | pixel.tovector(outvec);
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| 401 | return outvec;
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| 402 | };
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| 403 |
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| 404 | string PlotHelper::getGridRef()
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| 405 | {
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| 406 | if (!dircoord_p)
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| 407 | throw AipsError("Direction coordinate is not defined. Please set it first.");
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| 408 |
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| 409 | string outref;
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| 410 |
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| 411 | Vector<String> units = dircoord_p->worldAxisUnits();
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| 412 | Vector<Double> refv = dircoord_p->referenceValue();
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| 413 | MVAngle lon( Quantum<Double>(refv[0], units[0]) );
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| 414 | MVAngle lat ( Quantum<Double>(refv[1], units[1]) );
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| 415 | outref = MDirection::showType(dircoord_p->directionType()) + " "
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| 416 | + lon(0.0).string(MVAngle::TIME, 9) + " "
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| 417 | + lat.string(MVAngle::ANGLE+MVAngle::DIG2, 9);
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| 418 |
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| 419 | return outref;
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| 420 | };
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| 421 |
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| 422 | vector<double> PlotHelper::getGridCellVal()
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| 423 | {
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| 424 | if (!dircoord_p)
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| 425 | throw AipsError("Direction coordinate is not defined. Please set it first.");
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| 426 |
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| 427 | vector<double> outinc(2);
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| 428 | Vector<Double> inc = dircoord_p->increment();
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| 429 | Vector<String> units = dircoord_p->worldAxisUnits();
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| 430 | MVAngle qincx( Quantum<Double>(inc[0], units[0]) );
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| 431 | MVAngle qincy( Quantum<Double>(inc[1], units[1]) );
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| 432 | outinc[0] = (double) abs(qincx.radian());
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| 433 | outinc[1] = (double) abs(qincy.radian());
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| 434 |
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| 435 | return outinc;
|
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| 436 | };
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| 437 |
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| 438 |
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| 439 | } //namespace asap
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