1 | #include <iostream> |
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2 | #include <sstream> |
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3 | #include <string> |
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4 | #include <stdlib.h> |
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5 | #include <math.h> |
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6 | #include <cpgplot.h> |
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7 | |
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8 | using std::string; |
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9 | |
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10 | namespace Plot |
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11 | { |
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12 | const float inchToCm=2.54; // Conversion factor from inches to centimetres. |
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13 | const float a4width=21.0; // A4 width in cm |
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14 | const float a4height=29.7; // A4 height in cm |
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15 | const float psHoffset=0.35; // The default offset applied to ps files by pgplot |
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16 | const float psVoffset=0.25; // The default offset applied to ps files by pgplot |
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17 | |
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18 | |
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19 | //*************************************************************************** |
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20 | |
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21 | class SpectralPlot |
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22 | { |
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23 | /** |
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24 | * SpectralPlot class |
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25 | * A class to hold the dimensions and set up for the plotting of the spectra |
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26 | * (including the full spectra, the zoomed in part, and the moment map). |
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27 | * The physical dimensions (in inches) of the plot and the elements within |
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28 | * it are stored, based on the assumption that the plot will go on an A4 page. |
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29 | * Simple accessor functions are provided to enable access to quantities needed |
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30 | * for pgplot routines. |
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31 | */ |
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32 | public: |
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33 | SpectralPlot(){ |
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34 | paperWidth=a4width/inchToCm - 2*psHoffset; paperHeight = paperWidth*M_SQRT2; |
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35 | if(paperHeight+2*psVoffset > a4height){ |
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36 | paperHeight = a4height - 2*psVoffset; |
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37 | paperWidth = paperHeight / M_SQRT2; |
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38 | } |
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39 | spectraCount=0;}; |
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40 | ~SpectralPlot(){}; |
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41 | |
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42 | void setUpPlot(string pgDestination){ |
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43 | /** SpectralPlot::setUpPlot |
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44 | * Opens the designated pgplot device. |
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45 | * Scales the paper so that it fits on an A4 sheet (using known values of |
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46 | * the default pgplot offsets). |
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47 | */ |
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48 | cpgopen(pgDestination.c_str()); |
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49 | cpgpap(paperWidth, M_SQRT2); // make paper size to fit on A4. |
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50 | } |
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51 | |
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52 | void calcCoords(){ |
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53 | /** SpectralPlot::calcCoords() |
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54 | * Calculates the boundaries for the various boxes, in inches measured |
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55 | * from the lower left corner. |
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56 | * Based on the fact that there are numOnPage spectra shown on each page, |
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57 | * going down the page in increasing number -- given by spectraCount. |
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58 | */ |
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59 | int posOnPage = (numOnPage - (spectraCount%numOnPage))%numOnPage; |
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60 | mainCoords[0] = 2.0/inchToCm; |
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61 | mainCoords[1] = 13.7/inchToCm; |
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62 | zoomCoords[0] = 15.0/inchToCm; |
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63 | zoomCoords[1] = 16.8/inchToCm; |
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64 | mainCoords[2] = zoomCoords[2] = mapCoords[2] = |
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65 | posOnPage*paperHeight/float(numOnPage) + 1.8/inchToCm; |
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66 | mainCoords[3] = zoomCoords[3] = mapCoords[3] = |
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67 | posOnPage*paperHeight/float(numOnPage) + 3.8/inchToCm; |
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68 | mapCoords[0] = 17.0/inchToCm; |
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69 | mapCoords[1] = mapCoords[0] + (mapCoords[3]-mapCoords[2]); |
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70 | } |
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71 | |
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72 | void gotoHeader(string xlabel){ |
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73 | /** SpectralPlot::gotoHeader(string) |
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74 | * Calls calcCoords, to calculate correct coordinates for this spectrum. |
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75 | * Defines the region for the header information, making it centred |
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76 | * on the page. |
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77 | * Also writes the velocity (x axis) label, given by the string argument. |
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78 | */ |
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79 | if(spectraCount%numOnPage==0) cpgpage(); |
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80 | spectraCount++; |
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81 | calcCoords(); |
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82 | cpgvsiz(0., paperWidth, mainCoords[2], mainCoords[3]); |
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83 | cpgsch(labelSize); |
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84 | cpgmtxt("b",3.,0.5,0.5,xlabel.c_str()); |
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85 | } |
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86 | |
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87 | /** |
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88 | * Header line functions |
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89 | * Functions to write the header information above the boxes. |
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90 | * One for each line (position/velocity, widths & fluxes, pixel coords). |
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91 | */ |
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92 | void firstHeaderLine(string line){ cpgmtxt("t",3.6,0.5,0.5,line.c_str());}; |
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93 | void secondHeaderLine(string line){ cpgmtxt("t",2.3,0.5,0.5,line.c_str());}; |
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94 | void thirdHeaderLine(string line){ cpgmtxt("t",1.0,0.5,0.5,line.c_str());}; |
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95 | |
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96 | void gotoMainSpectrum(float x1, float x2, float y1, float y2, string ylabel){ |
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97 | /** SpectralPlot::gotoMainSpectrum() |
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98 | * Defines the region for the main spectrum. |
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99 | * Draws the box, with tick marks, and |
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100 | * writes the flux (y axis) label, given by the string argument. |
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101 | */ |
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102 | cpgvsiz(mainCoords[0],mainCoords[1],mainCoords[2],mainCoords[3]); |
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103 | cpgsch(indexSize); |
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104 | cpgswin(x1,x2,y1,y2); |
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105 | cpgbox("1bcnst",0.,0,"bcnst1v",0.,0); |
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106 | cpgsch(labelSize); |
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107 | cpgmtxt("l",4.,0.5,0.5,ylabel.c_str()); |
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108 | } |
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109 | |
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110 | void gotoZoomSpectrum(float x1, float x2, float y1, float y2){ |
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111 | /** SpectralPlot::gotoZoomSpectrum() |
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112 | * Defines the region for the zoomed-in part of the spectrum. |
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113 | * Draws the box, with special tick marks on the x-axis. |
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114 | */ |
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115 | cpgvsiz(zoomCoords[0],zoomCoords[1],zoomCoords[2],zoomCoords[3]); |
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116 | cpgsch(indexSize); |
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117 | cpgswin(x1,x2,y1,y2); |
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118 | cpgbox("bc",0.,0,"bcstn1v",0.,0); |
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119 | float length,disp; |
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120 | std::stringstream labelstream; |
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121 | for(int i=1;i<10;i++){ |
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122 | labelstream.str(""); |
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123 | switch(i){ |
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124 | case 2: |
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125 | length = 0.6; |
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126 | labelstream<<x1+(x2-x1)*float(i)/10.; |
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127 | disp = 0.2; |
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128 | break; |
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129 | case 8: |
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130 | length = 0.6; |
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131 | labelstream<<x1+(x2-x1)*float(i)/10.; |
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132 | disp = 1.2; |
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133 | break; |
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134 | default: |
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135 | length = 0.3; |
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136 | break; |
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137 | } |
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138 | cpgtick(x1,y1,x2,y1,float(i)/10.,length,0.3,disp,0.,labelstream.str().c_str()); |
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139 | cpgtick(x1,y2,x2,y2,float(i)/10.,0.,length,0.,0.,""); |
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140 | } |
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141 | } |
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142 | |
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143 | void gotoMap(){ |
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144 | /** SpectralPlot::gotoMap() |
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145 | * Defines the region for the moment map. |
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146 | */ |
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147 | cpgvsiz(mapCoords[0],mapCoords[1],mapCoords[2],mapCoords[3]); |
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148 | cpgsch(indexSize); |
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149 | } |
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150 | |
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151 | void drawVelRange(float v1, float v2){ |
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152 | /** SpectralPlot::drawVelRange(float v1, float v2) |
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153 | * Draws two vertical lines at the limits of velocity given by the arguments. |
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154 | */ |
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155 | int ci,ls; |
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156 | float dud,min,max; |
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157 | cpgqwin(&dud,&dud,&min,&max); |
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158 | cpgqci(&ci); |
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159 | cpgqls(&ls); |
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160 | // cpgscr(18, 0., 0.7, 0.); |
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161 | // cpgsci(18); |
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162 | cpgsci(4); |
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163 | cpgsls(2); |
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164 | cpgmove(v1,min); cpgdraw(v1,max); |
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165 | cpgmove(v2,min); cpgdraw(v2,max); |
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166 | cpgsci(ci); |
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167 | cpgsls(ls); |
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168 | } |
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169 | |
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170 | private: |
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171 | const static int numOnPage = 5; // Number of spectra to put on one page. |
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172 | int spectraCount; // Number of spectra done so far -- where on the page? |
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173 | float mainCoords[4]; // Boundaries for the main spectrum [inches] |
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174 | float zoomCoords[4]; // Boundaries for the zoomed-in spectrum [inches] |
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175 | float mapCoords[4]; // Boundaries for the map box [inches] |
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176 | float paperWidth; // Width of the plottable region of the paper [inches] |
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177 | float paperHeight; // Height of the plottable region of the paper [inches] |
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178 | const static float indexSize = 0.6; // PGPlot character height for tick mark labels |
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179 | const static float labelSize = 0.8; // PGPlot character height for axis labels. |
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180 | |
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181 | }; |
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182 | |
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183 | //*************************************************************************** |
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184 | |
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185 | class ImagePlot |
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186 | { |
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187 | /** |
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188 | * ImagePlot class |
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189 | * A class to hold the dimensions and set up for the plots used by the two |
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190 | * functions below. |
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191 | * The physical dimensions (in inches) of the plot and the elements within |
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192 | * it are stored, including maximum widths and heights (so that the plot will |
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193 | * fit on an A4 page). |
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194 | * Simple accessor functions are provided to enable access to quantities needed |
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195 | * for pgplot routines. |
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196 | */ |
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197 | public: |
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198 | ImagePlot(){ |
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199 | paperWidth = 7.5; maxPaperHeight = 10.; marginWidth = 0.8; wedgeWidth = 0.7; |
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200 | imageWidth = paperWidth - 2*marginWidth - wedgeWidth; |
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201 | }; |
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202 | ~ImagePlot(){}; |
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203 | |
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204 | void setUpPlot(string pgDestination, float x, float y){ |
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205 | /** |
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206 | * setUpPlot(string pgDestination, float x, float y) |
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207 | * Opens a pgplot device and scales it to the correct shape. |
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208 | * In doing so, the dimensions for the image are set, and the required aspect ratios |
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209 | * of the image and of the plot are calculated. |
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210 | * If the resulting image is going to be tall enough to exceed the maximum height |
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211 | * (given the default width), then scale everything down by enough to make the |
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212 | * height equal to maxPaperHeight. |
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213 | */ |
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214 | xdim = x; |
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215 | ydim = y; |
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216 | imageRatio= ydim / xdim; |
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217 | aspectRatio = (imageRatio*imageWidth + 2*marginWidth) / paperWidth; |
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218 | if((imageRatio*imageWidth + 2*marginWidth) > maxPaperHeight){ |
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219 | float correction = maxPaperHeight / (imageRatio*imageWidth + 2*marginWidth); |
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220 | paperWidth *= correction; |
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221 | marginWidth *= correction; |
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222 | wedgeWidth *= correction; |
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223 | imageWidth = paperWidth - 2*marginWidth - wedgeWidth; |
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224 | } |
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225 | cpgopen(pgDestination.c_str()); |
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226 | cpgpap(paperWidth, aspectRatio); |
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227 | } |
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228 | |
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229 | void drawMapBox(float x1, float x2, float y1, float y2, string xlabel, string ylabel){ |
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230 | /** |
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231 | * drawMapBox() |
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232 | * Defines the region that the box containing the map is to go in, |
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233 | * and draws the box with limits given by the arguments. |
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234 | * The labels for the x and y axes are also given as arguments. |
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235 | */ |
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236 | cpgvsiz(marginWidth, marginWidth + imageWidth, |
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237 | marginWidth, marginWidth + (imageWidth*imageRatio)); |
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238 | cpgslw(2); |
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239 | cpgswin(x1,x2,y1,y2); |
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240 | cpgbox("bcst",0.,0,"bcst",0.,0); |
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241 | cpgslw(1); |
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242 | cpgbox("bcnst",0.,0,"bcnst",0.,0); |
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243 | cpglab(xlabel.c_str(), ylabel.c_str(), ""); |
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244 | } |
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245 | void makeTitle(string title){ |
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246 | /** |
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247 | * makeTitle(string) |
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248 | * Writes the title for the plot, making it centred for the entire plot |
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249 | * and not just the map. |
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250 | */ |
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251 | cpgvstd(); |
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252 | cpgmtxt("t", 2.7, 0.5, 0.5, title.c_str()); |
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253 | } |
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254 | float cmToCoord(float cm){return (cm/inchToCm) * ydim / (imageWidth*imageRatio);}; |
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255 | float getMargin() {return marginWidth;}; |
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256 | float getPaperWidth() {return paperWidth;}; |
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257 | float getImageWidth() {return imageWidth;}; |
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258 | float getImageHeight(){return imageWidth*imageRatio;}; |
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259 | float getAspectRatio(){return aspectRatio;}; |
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260 | |
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261 | private: |
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262 | float paperWidth; // Default (maximum) width of "paper" [inches] |
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263 | float maxPaperHeight; // Maximum allowed height of paper [inches] |
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264 | float marginWidth; // Width allowed for margins around main plot (ie. label & numbers) [inches] |
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265 | float wedgeWidth; // Width allowed for placement of wedge on right hand side of plot. [inches] |
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266 | float imageWidth; // Calculated total width of the image part of the plot [inches] |
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267 | float imageRatio; // Aspect ratio of the image only (ie. y-value range / x-value range). |
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268 | float aspectRatio; // Aspect ratio of whole plot. |
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269 | float xdim; // Width of main plot, in display units. |
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270 | float ydim; // Height of main plot, in display units. |
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271 | }; |
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272 | |
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273 | } |
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