| 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 | // ASAP
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| 14 | #include "PlotHelper.h"
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| 15 |
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| 16 | // casacore
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| 17 | #include <casa/Arrays/Vector.h>
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| 18 | #include <casa/Quanta/Quantum.h>
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| 19 | #include <casa/Quanta/QuantumHolder.h>
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| 20 | #include <casa/Quanta/MVAngle.h>
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| 21 | #include <casa/Logging/LogIO.h>
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| 22 |
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| 23 | #include <measures/Measures/MDirection.h>
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| 24 | #include <tables/Tables/TableRecord.h>
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| 25 |
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| 26 |
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| 27 | #define SMALL_ANGLE 1.0e-7
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| 28 |
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| 29 | // #ifndef KS_DEBUG
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| 30 | // #define KS_DEBUG
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| 31 | // #endif
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| 32 |
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| 33 | using namespace std ;
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| 34 | using namespace casacore ;
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| 35 | using namespace asap ;
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| 36 |
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| 37 | namespace asap {
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| 38 |
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| 39 | PlotHelper::PlotHelper() : dircoord_p(0)
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| 40 | {
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| 41 | #ifdef KS_DEBUG
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| 42 | cout << "Default constructor nrow = " << data_p->nrow() << endl;
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| 43 | #endif
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| 44 | };
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| 45 |
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| 46 | PlotHelper::PlotHelper( const ScantableWrapper &s) : dircoord_p(0)
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| 47 | {
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| 48 | #ifdef KS_DEBUG
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| 49 | cout << "Constructing PlotHelper with scantable wrapper" << endl;
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| 50 | #endif
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| 51 | setScantable(s);
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| 52 | };
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| 53 |
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| 54 | PlotHelper::~PlotHelper(){
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| 55 | #ifdef KS_DEBUG
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| 56 | cout << "Called PlotHelper destructor" << endl;
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| 57 | #endif
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| 58 | if (dircoord_p){
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| 59 | #ifdef KS_DEBUG
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| 60 | cout << "Destructing dircoord_p" << endl;
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| 61 | #endif
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| 62 | delete dircoord_p;
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| 63 | dircoord_p = 0;
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| 64 | }
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| 65 | };
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| 66 |
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| 67 | void PlotHelper::setScantable( const ScantableWrapper &s )
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| 68 | {
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| 69 | #ifdef KS_DEBUG
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| 70 | cout << "Setting scantable" << endl;
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| 71 | #endif
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| 72 | data_p = s.getCP();
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| 73 | };
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| 74 |
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| 75 |
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| 76 | DirectionCoordinate PlotHelper::getSTCoord(const int nx, const int ny,
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| 77 | const Projection::Type ptype)
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| 78 | {
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| 79 | LogIO os(LogOrigin("PlotHelper","getSTCoord()", WHERE));
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| 80 | os << "Getting pointing information of the scantable." << LogIO::POST;
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| 81 | if (data_p->nrow() < 1)
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| 82 | throw AipsError("Scantable is not set. Please set a scantable first.");
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| 83 |
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| 84 | // First, generate rough direction coordinate.
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| 85 | DirectionCoordinate coord;
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| 86 | Double incx, incy;
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| 87 | MDirection::Types mdt;
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| 88 | ROArrayColumn<Double> dircol;
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| 89 | Double xmax, xmin, ymax, ymin;
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| 90 | Double centx, centy;
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| 91 | Matrix<Double> xform(2,2);
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| 92 | xform = 0.0;
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| 93 | xform.diagonal() = 1.0;
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| 94 | // Rough estimates of center and cell from scantable DIRECTIONs.
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| 95 | dircol.attach( data_p->table(), "DIRECTION" );
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| 96 | const Vector<String> udir = dircol.keywordSet().asArrayString("QuantumUnits");
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| 97 | const Matrix<Double> direction = dircol.getColumn();
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| 98 | minMax(xmin, xmax, direction.row(0));
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| 99 | minMax(ymin, ymax, direction.row(1));
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| 100 | if (!MDirection::getType(mdt, data_p->getDirectionRefString()))
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| 101 | throw AipsError("Failed to get direction reference from scantable.");
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| 102 | centx = 0.5 * (xmin + xmax);
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| 103 | centy = 0.5 * (ymin + ymax);
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| 104 | incx = abs(xmax - xmin) / (double) nx * cos(centy);
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| 105 | incy = abs(ymax - ymin) / (double) ny;
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| 106 | // Direction coordinate seems not work well with inc=0. set very small value.
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| 107 | if (incx == 0.) incx = SMALL_ANGLE;
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| 108 | if (incy == 0.) incy = SMALL_ANGLE;
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| 109 | // Generate a temporal direction coordinte
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| 110 | coord = DirectionCoordinate(mdt, ptype,
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| 111 | centx, centy, incx, incy, xform,
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| 112 | 0.5*Double(nx), 0.5*Double(ny));
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| 113 | coord.setWorldAxisUnits(udir);
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| 114 | #ifdef KS_DEBUG
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| 115 | {//Debug outputs
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| 116 | cout << "Generated a temporal direction coordinate of a scantable: " << endl;
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| 117 | Vector<String> units = coord.worldAxisUnits();
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| 118 | Vector<Double> refv = coord.referenceValue();
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| 119 | cout <<"- Reference: " << MDirection::showType(coord.directionType()) << " " << refv[0] << units[0] << " " << refv[1] << units[1] << endl;
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| 120 | Vector<Double> refpix = coord.referencePixel();
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| 121 | cout <<"- Reference Pixel: [" << refpix[0] << ", " << refpix[1] << "]" << endl;
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| 122 | Vector<Double> inc = coord.increment();
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| 123 | cout <<"- Increments: [" << inc[0] << ", " << inc[1] << "]" << endl;
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| 124 | cout <<"- Projection: " << coord.projection().name() << endl;
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| 125 | }
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| 126 | #endif
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| 127 | return coord;
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| 128 | }
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| 129 |
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| 130 | void PlotHelper::setGridParam(const int nx, const int ny,
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| 131 | const string cellx, const string celly,
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| 132 | string center, const string projname)
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| 133 | {
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| 134 | LogIO os(LogOrigin("PlotHelper","setGridParam()", WHERE));
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| 135 | // Value check of nx and ny
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| 136 | if (nx < 1)
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| 137 | throw(AipsError("nx should be > 0"));
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| 138 | if (ny < 1)
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| 139 | throw(AipsError("ny should be > 0"));
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| 140 | // Destroy old coord
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| 141 | if (dircoord_p){
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| 142 | #ifdef KS_DEBUG
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| 143 | cout << "Destructing old dircoord_p" << endl;
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| 144 | #endif
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| 145 | delete dircoord_p;
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| 146 | dircoord_p = 0;
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| 147 | }
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| 148 |
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| 149 | // Check for availability of data_p
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| 150 | const bool stset = ((data_p->nrow() > 0) ? true : false);
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| 151 | const bool needst = center.empty() || (cellx.empty() && celly.empty());
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| 152 | if (needst && !stset)
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| 153 | throw AipsError("Could not resolve grid parameters. Please set a scantable first.");
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| 154 |
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| 155 | // projection
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| 156 | Projection::Type projtype(Projection::type(String(projname)));
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| 157 |
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| 158 | // Calculate projected map center (in world coordinate)
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| 159 | // and extent (in pixel coordinate) from scantable DIRECIONs (if necessary).
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| 160 | MDirection stcent;
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| 161 | Double stxmax, stxmin, stymax, stymin;
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| 162 | MDirection::Types stdt;
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| 163 | DirectionCoordinate stcoord;
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| 164 | Quantum<Double> stincx, stincy;
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| 165 | if (needst && stset) {
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| 166 | stcoord = getSTCoord(nx, ny, projtype);
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| 167 | Vector<Double> inc = stcoord.increment();
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| 168 | Vector<String> units = stcoord.worldAxisUnits();
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| 169 | stincx = Quantum<Double>(inc[0], units[0]);
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| 170 | stincy = Quantum<Double>(inc[1], units[0]);
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| 171 | stdt = stcoord.directionType();
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| 172 | // Get the extent of directions in Pixel coordinate
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| 173 | ROArrayColumn<Double> dircol;
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| 174 | dircol.attach( data_p->table(), "DIRECTION" );
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| 175 | const Matrix<Double> direction = dircol.getColumn();
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| 176 | Matrix<Double> dirpix;
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| 177 | Vector<Bool> failures;
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| 178 | if (!stcoord.toPixelMany(dirpix, direction, failures))
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| 179 | throw AipsError("Failed to get directions in pixel coordinate.");
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| 180 | minMax(stxmin, stxmax, dirpix.row(0));
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| 181 | minMax(stymin, stymax, dirpix.row(1));
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| 182 | // Get the direction center in World coordinate.
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| 183 | Vector<Double> centpix(2);
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| 184 | centpix[0] = 0.5 * (stxmin + stxmax);
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| 185 | centpix[1] = 0.5 * (stymin + stymax);
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| 186 | stcoord.toWorld(stcent, centpix);
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| 187 | #ifdef KS_DEBUG
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| 188 | {//Debug output
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| 189 | Quantum< Vector<Double> > qcent;
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| 190 | cout << "Got the center and map extent of scantable." << endl;
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| 191 | qcent = stcent.getAngle();
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| 192 | cout << "- Center of DIRECTIONs: " << stcent.getRefString() << " "
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| 193 | << qcent.getValue()[0] << qcent.getUnit() << " "
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| 194 | << qcent.getValue()[1] << qcent.getUnit() << endl;
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| 195 | cout << "- Map extent: [" << (stxmax-stxmin)*stincx.getValue() << ", "
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| 196 | << (stymax-stymin)*stincy.getValue() << "] ( " << stincx.getUnit() << ")" << endl;
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| 197 | }
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| 198 | #endif
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| 199 | }
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| 200 |
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| 201 | os << "Setting grid parameters" << LogIO::POST;
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| 202 | // Now, define direction coordinate from input parameters (in radian)
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| 203 | Double incx, incy;
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| 204 | Double centx, centy;
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| 205 | MDirection::Types mdt;
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| 206 | // center
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| 207 | if (center.empty()){
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| 208 | os << "center is not specified. Using pointing center of the scantable." << LogIO::POST;
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| 209 | if (!stset)
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| 210 | throw AipsError("Scantable is not set. Could not resolve map center.");
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| 211 |
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| 212 | centx = stcent.getAngle("rad").getValue()[0];
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| 213 | centy = stcent.getAngle("rad").getValue()[1];
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| 214 | mdt = stdt;
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| 215 | } else {
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| 216 | os << "Using user defined center" << LogIO::POST;
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| 217 | // Parse center string
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| 218 | string::size_type pos0 = center.find(" ");
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| 219 |
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| 220 | if (pos0 == string::npos)
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| 221 | throw AipsError("bad string format in center direction");
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| 222 |
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| 223 | string::size_type pos1 = center.find(" ", pos0+1);
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| 224 | String sepoch, sra, sdec;
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| 225 | if (pos1 != string::npos) {
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| 226 | sepoch = center.substr(0, pos0);
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| 227 | sra = center.substr(pos0+1, pos1-pos0);
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| 228 | sdec = center.substr(pos1+1);
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| 229 | } else {
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| 230 | sepoch = "J2000";
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| 231 | sra = center.substr(0, pos0);
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| 232 | sdec = center.substr(pos0+1);
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| 233 | }
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| 234 | if (!MDirection::getType(mdt,sepoch))
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| 235 | throw AipsError("Invalid direction reference in center");
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| 236 | if (stset){
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| 237 | if ( !needst &&
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| 238 | !MDirection::getType( stdt, data_p->getDirectionRefString() ) )
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| 239 | throw AipsError("Failed to get direction reference from scantable.");
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| 240 | if (mdt != stdt)
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| 241 | throw AipsError("Direction reference of center should be the same as input scantable");
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| 242 | }
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| 243 | QuantumHolder qh ;
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| 244 | String err ;
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| 245 | qh.fromString(err, sra);
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| 246 | Quantum<Double> ra = qh.asQuantumDouble();
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| 247 | qh.fromString(err, sdec) ;
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| 248 | Quantum<Double> dec = qh.asQuantumDouble();
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| 249 | centx = ra.getValue("rad");
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| 250 | centy = dec.getValue("rad");
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| 251 | // rotaion
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| 252 | if (stset) {
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| 253 | Double stcentx = stcent.getAngle("rad").getValue()[0];
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| 254 | Double rotnum = round( abs(centx - stcentx) / (C::_2pi) );
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| 255 | if (centx < stcentx) rotnum *= -1;
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| 256 | centx -= (rotnum * C::_2pi);
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| 257 | }
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| 258 | }
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| 259 | os << "Grid center: ( " << centx << " rad , " << centy << " rad ) " << LogIO::POST;
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| 260 |
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| 261 | // cell
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| 262 | if (cellx.empty() && celly.empty()){
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| 263 | os << "cell size is not specified. Using cell size to cover all pointings in the scantable." << LogIO::POST;
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| 264 | if (!stset)
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| 265 | throw AipsError("Scantable is not set. Could not resolve cell size.");
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| 266 |
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| 267 | Vector<Double> centpix;
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| 268 | MDirection centmd = MDirection(Quantum<Double>(centx, "rad"),
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| 269 | Quantum<Double>(centy, "rad"), mdt);
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| 270 | stcoord.toPixel(centpix, centmd);
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| 271 | #ifdef KS_DEBUG
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| 272 | cout << "- got centpix [" << centpix[0] << ", " << centpix[1] << "]" <<endl;
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| 273 | #endif
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| 274 | // Direction coordinate seems not work well with inc=0. set very small value.
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| 275 | Double wx = max( max( abs(stxmax-centpix[0]), abs(stxmin-centpix[0]) ), 0.5 )
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| 276 | * 2 * stincx.getValue("rad");
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| 277 | Double wy = max( max( abs(stymax-centpix[1]), abs(stymin-centpix[1]) ), 0.5 )
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| 278 | * 2 * stincy.getValue("rad");
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| 279 | incx = wx / max(nx - 1., 1.);
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| 280 | incy = wy / max(ny - 1., 1.);
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| 281 | } else {
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| 282 | os << "Using user defined cell size" << LogIO::POST;
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| 283 | Quantum<Double> qcellx, qcelly;
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| 284 | if (!cellx.empty() && !celly.empty()){
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| 285 | readQuantity(qcellx, String(cellx));
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| 286 | readQuantity(qcelly, String(celly));
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| 287 | } else if (celly.empty()) {
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| 288 | readQuantity(qcellx, String(cellx));
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| 289 | qcelly = qcellx;
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| 290 | } else { //only celly is defined
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| 291 | readQuantity(qcelly, String(celly));
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| 292 | qcellx = qcelly;
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| 293 | }
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| 294 | incx = qcellx.getValue("rad");
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| 295 | incy = qcelly.getValue("rad");
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| 296 | }
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| 297 | // inc should be negative to transpose plot
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| 298 | incx = -abs(incx);
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| 299 | incy = -abs(incy);
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| 300 |
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| 301 | os << "Spacing: ( " << abs(incx) << " rad , " << abs(incy) << " rad )" <<endl;
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| 302 |
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| 303 | setupCoord(mdt, projtype, centx, centy, incx, incy,
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| 304 | 0.5*Double(nx), 0.5*Double(ny)) ; // pixel at center)
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| 305 |
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| 306 | };
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| 307 |
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| 308 | void PlotHelper::setGridParamVal(const int nx, const int ny,
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| 309 | const double cellx, const double celly,
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| 310 | const double centx, const double centy,
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| 311 | const string epoch, const string projname){
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| 312 | LogIO os(LogOrigin("PlotHelper","setGridParamVal()", WHERE));
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| 313 | // Value check of nx and ny
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| 314 | if (nx < 1)
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| 315 | throw(AipsError("nx should be > 0"));
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| 316 | if (ny < 1)
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| 317 | throw(AipsError("ny should be > 0"));
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| 318 | // Destroy old coord
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| 319 | if (dircoord_p){
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| 320 | #ifdef KS_DEBUG
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| 321 | cout << "Destructing old dircoord_p" << endl;
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| 322 | #endif
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| 323 | delete dircoord_p;
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| 324 | dircoord_p = 0;
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| 325 | }
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| 326 |
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| 327 | // center (in rad)
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| 328 | Double centX(centx), centY(centy);
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| 329 | // cell size (in rad)
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| 330 | Double incX(cellx), incY(celly);
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| 331 | // epoch
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| 332 | MDirection::Types mdt;
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| 333 | MDirection::getType(mdt, String(epoch));
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| 334 | // projection
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| 335 | Projection::Type projType(Projection::type(String(projname)));
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| 336 |
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| 337 | setupCoord(mdt, projType, centX, centY, incX, incY,
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| 338 | 0.5*Double(nx), 0.5*Double(ny)) ; // pixel at center
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| 339 | // 0.5*Double(nx-1), 0.5*Double(ny-1)) ; // pixel at grid
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| 340 |
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| 341 | };
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| 342 |
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| 343 |
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| 344 | void PlotHelper::setupCoord(const MDirection::Types mdt,
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| 345 | const Projection::Type pjt,
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| 346 | const Double centx, const Double centy,
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| 347 | const Double incx, const Double incy,
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| 348 | const Double refx, const Double refy)
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| 349 | {
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| 350 | LogIO os(LogOrigin("PlotHelper","setupCoord()", WHERE));
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| 351 | // Destroy old coord
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| 352 | if (dircoord_p){
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| 353 | #ifdef KS_DEBUG
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| 354 | cout << "Destructing old dircoord_p" << endl;
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| 355 | #endif
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| 356 | delete dircoord_p;
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| 357 | dircoord_p = 0;
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| 358 | }
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| 359 |
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| 360 | Matrix<Double> xform(2,2) ;
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| 361 | xform = 0.0 ;
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| 362 | xform.diagonal() = 1.0 ;
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| 363 | dircoord_p = new DirectionCoordinate(mdt, pjt, centx, centy, incx, incy,
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| 364 | xform, refx, refy);
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| 365 | {//Summary
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| 366 | os << "Successfully generated grid coordinate:" << LogIO::POST;
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| 367 | Vector<String> units = dircoord_p->worldAxisUnits();
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| 368 | Vector<Double> refv = dircoord_p->referenceValue();
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| 369 | os <<"- Reference Direction : "
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| 370 | << MDirection::showType(dircoord_p->directionType())
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| 371 | << " " << refv[0] << units[0] << " " << refv[1] << units[1] << LogIO::POST;
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| 372 | Vector<Double> refpix = dircoord_p->referencePixel();
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| 373 | os <<"- Reference Pixel : [" << refpix[0] << ", " << refpix[1] << "]" << LogIO::POST;
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| 374 | Vector<Double> inc = dircoord_p->increment();
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| 375 | os <<"- Increments : [" << inc[0] << ", " << inc[1] << "]" << LogIO::POST;
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| 376 | os <<"- Projection Type : " << dircoord_p->projection().name() << LogIO::POST;
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| 377 | }
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| 378 | };
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| 379 |
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| 380 | vector<double> PlotHelper::getGridPixel(const int whichrow)
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| 381 | {
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| 382 | if (data_p->nrow() < 1)
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| 383 | throw AipsError("Scantable is not set. Could not get direction.");
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| 384 | else if (whichrow > int(data_p->nrow()) - 1)
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| 385 | throw AipsError("Row index out of range.");
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| 386 | if (!dircoord_p)
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| 387 | throw AipsError("Direction coordinate is not defined.");
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| 388 |
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| 389 | Vector<Double> pixel;
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| 390 | MDirection world;
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| 391 | vector<double> outvec;
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| 392 | world = data_p->getDirection(whichrow);
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| 393 | #ifdef KS_DEBUG
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| 394 | cout << "searching pixel position (world = " << data_p->getDirectionString(whichrow) << " = [" << world.getAngle("rad").getValue()[0] << ", " << world.getAngle("rad").getValue()[1] << "])" << endl;
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| 395 | #endif
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| 396 | dircoord_p->toPixel(pixel, world);
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| 397 | #ifdef KS_DEBUG
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| 398 | cout << "got pixel = [" << pixel[0] << ", " << pixel[1] << "]" << endl;
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| 399 | #endif
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| 400 | // convert pixel to std vector
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| 401 | pixel.tovector(outvec);
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| 402 | return outvec;
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| 403 | };
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| 404 |
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| 405 | string PlotHelper::getGridRef()
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| 406 | {
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| 407 | if (!dircoord_p)
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| 408 | throw AipsError("Direction coordinate is not defined. Please set it first.");
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| 409 |
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| 410 | string outref;
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| 411 |
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| 412 | Vector<String> units = dircoord_p->worldAxisUnits();
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| 413 | Vector<Double> refv = dircoord_p->referenceValue();
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| 414 | MVAngle lon( Quantum<Double>(refv[0], units[0]) );
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| 415 | MVAngle lat ( Quantum<Double>(refv[1], units[1]) );
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| 416 | outref = MDirection::showType(dircoord_p->directionType()) + " "
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| 417 | + lon(0.0).string(MVAngle::TIME, 9) + " "
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| 418 | + lat.string(MVAngle::ANGLE+MVAngle::DIG2, 9);
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| 419 |
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| 420 | return outref;
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| 421 | };
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| 422 |
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| 423 | vector<double> PlotHelper::getGridCellVal()
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| 424 | {
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| 425 | if (!dircoord_p)
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| 426 | throw AipsError("Direction coordinate is not defined. Please set it first.");
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| 427 |
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| 428 | vector<double> outinc(2);
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| 429 | Vector<Double> inc = dircoord_p->increment();
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| 430 | Vector<String> units = dircoord_p->worldAxisUnits();
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| 431 | MVAngle qincx( Quantum<Double>(inc[0], units[0]) );
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| 432 | MVAngle qincy( Quantum<Double>(inc[1], units[1]) );
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| 433 | outinc[0] = (double) abs(qincx.radian());
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| 434 | outinc[1] = (double) abs(qincy.radian());
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| 435 |
|
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| 436 | return outinc;
|
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| 437 | };
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| 438 |
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| 439 |
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| 440 | } //namespace asap
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