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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