1 | #include <iostream> |
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2 | #include <math.h> |
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3 | #include <wcs.h> |
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4 | #include <wcsunits.h> |
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5 | #include <Utils/utils.hh> |
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6 | |
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7 | int pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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8 | { |
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9 | /** |
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10 | * pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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11 | * Uses wcs to convert the three-dimensional pixel position referenced by pix |
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12 | * to world coordinates, which are placed in the array world[]. |
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13 | * Assumes that pix only has one point with an x,y,and z pixel positions. |
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14 | * Offsets these pixel values by 1 to account for the C arrays being indexed to 0. |
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15 | */ |
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16 | |
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17 | int nelem=3,npts=1,flag; |
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18 | |
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19 | double *newpix = new double[nelem*npts]; |
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20 | for(int i=0;i<nelem*npts;i++) newpix[i] = pix[i] + 1.; |
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21 | // correct from 0-indexed to 1-indexed pixel array |
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22 | |
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23 | int *stat = new int[npts]; |
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24 | double *imgcrd = new double[nelem*npts]; |
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25 | double *phi = new double[npts]; |
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26 | double *theta = new double[npts]; |
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27 | if(flag=wcsp2s(wcs, npts, nelem, newpix, imgcrd, phi, theta, world, stat)>0){ |
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28 | std::cerr << "ERROR <pixToWCSSingle> : WCS Error Code = " <<flag<<": " |
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29 | <<wcs_errmsg[flag]<<std::endl; |
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30 | std::cerr << " stat value is " << stat[0] << std::endl; |
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31 | } |
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32 | delete [] stat; |
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33 | delete [] imgcrd; |
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34 | delete [] phi; |
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35 | delete [] theta; |
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36 | delete [] newpix; |
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37 | return flag; |
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38 | } |
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39 | |
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40 | int wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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41 | { |
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42 | /** |
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43 | * wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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44 | * Uses wcs to convert the three-dimensional world coordinate position referenced by world |
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45 | * to pixel coordinates, which are placed in the array pix[]. |
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46 | * Assumes that world only has one point (three values eg. RA, Dec, Velocity) |
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47 | * Offsets the pixel values by 1 to account for the C arrays being indexed to 0. |
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48 | */ |
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49 | |
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50 | int nelem=3,npts=1,flag; |
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51 | int *stat = new int[npts]; |
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52 | double *imgcrd = new double[nelem*npts]; |
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53 | double *phi = new double[npts]; |
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54 | double *theta = new double[npts]; |
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55 | if(flag=wcss2p(wcs, npts, nelem, world, phi, theta, imgcrd, pix, stat)>0){ |
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56 | std::cerr << "ERROR <wcsToPixSingle> : WCS Error Code = " <<flag<<": " |
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57 | <<wcs_errmsg[flag]<<std::endl; |
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58 | std::cerr << " stat value is " << stat[0] << std::endl; |
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59 | } |
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60 | |
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61 | for(int i=0;i<nelem;i++) pix[i] -= 1.; // correct from 1-indexed to 0-indexed pixel array |
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62 | |
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63 | delete [] stat; |
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64 | delete [] imgcrd; |
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65 | delete [] phi; |
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66 | delete [] theta; |
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67 | return flag; |
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68 | } |
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69 | |
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70 | int pixToWCSMulti(wcsprm *wcs, const double *pix, double *world, const int npts) |
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71 | { |
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72 | /** |
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73 | * pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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74 | * Uses wcs to convert the three-dimensional pixel positions referenced by pix |
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75 | * to world coordinates, which are placed in the array world[]. |
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76 | * pix is assumed to hold the positions of npts points. |
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77 | * Offsets these pixel values by 1 to account for the C arrays being indexed to 0. |
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78 | */ |
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79 | |
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80 | int nelem=3,flag; |
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81 | |
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82 | double *newpix = new double[nelem*npts]; |
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83 | for(int i=0;i<nelem*npts;i++) newpix[i] = pix[i] + 1.; |
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84 | // correct from 0-indexed to 1-indexed pixel array |
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85 | |
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86 | int *stat = new int[npts]; |
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87 | double *imgcrd = new double[nelem*npts]; |
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88 | double *phi = new double[npts]; |
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89 | double *theta = new double[npts]; |
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90 | if(flag=wcsp2s(wcs, npts, nelem, newpix, imgcrd, phi, theta, world, stat)>0){ |
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91 | std::cerr << "ERROR <pixToWCSMulti> : WCS Error Code = " <<flag<<": " |
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92 | <<wcs_errmsg[flag]<<std::endl; |
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93 | std::cerr << " stat value is " << stat[0] << std::endl; |
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94 | } |
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95 | delete [] stat; |
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96 | delete [] imgcrd; |
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97 | delete [] phi; |
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98 | delete [] theta; |
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99 | delete [] newpix; |
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100 | return flag; |
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101 | } |
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102 | |
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103 | int wcsToPixMulti(wcsprm *wcs, const double *world, double *pix, const int npts) |
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104 | { |
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105 | /** |
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106 | * wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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107 | * Uses wcs to convert the three-dimensional world coordinate position referenced by world |
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108 | * to pixel coordinates, which are placed in the array pix[]. |
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109 | * world is assumed to hold the positions of npts points. |
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110 | * Offsets the pixel values by 1 to account for the C arrays being indexed to 0. |
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111 | */ |
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112 | |
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113 | int nelem=3,flag=0; |
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114 | int *stat = new int[npts]; |
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115 | double *imgcrd = new double[nelem*npts]; |
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116 | double *phi = new double[npts]; |
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117 | double *theta = new double[npts]; |
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118 | if(flag=wcss2p(wcs, npts, nelem, world, phi, theta, imgcrd, pix, stat)>0){ |
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119 | std::cerr << "ERROR <wcsToPixMulti> : WCS Error Code = " <<flag<<": " |
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120 | <<wcs_errmsg[flag]<<std::endl; |
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121 | std::cerr << " stat value is " << stat[0] << std::endl; |
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122 | } |
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123 | |
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124 | for(int i=0;i<nelem;i++) pix[i] -= 1.; // correct from 1-indexed to 0-indexed pixel array |
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125 | |
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126 | delete [] stat; |
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127 | delete [] imgcrd; |
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128 | delete [] phi; |
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129 | delete [] theta; |
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130 | return flag; |
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131 | } |
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132 | |
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133 | double pixelToVelocity(wcsprm *wcs, double &x, double &y, double &z, string velUnits) |
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134 | { |
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135 | /** |
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136 | * pixelToVelocity(wcsprm *wcs, double &x, double &y, double &z, string velUnits) |
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137 | * Uses wcs to convert the three-dimensional pixel position (x,y,z) |
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138 | * to world coordinates. |
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139 | * Returns the velocity in the units given by velUnits. |
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140 | */ |
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141 | |
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142 | int *stat = new int[1]; |
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143 | double *pixcrd = new double[3]; |
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144 | double *imgcrd = new double[3]; |
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145 | double *world = new double[3]; |
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146 | double *phi = new double[1]; |
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147 | double *theta = new double[1]; |
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148 | // correct from 0-indexed to 1-indexed pixel array by adding 1 to pixel values. |
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149 | pixcrd[0] = x + 1; |
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150 | pixcrd[1] = y + 1; |
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151 | pixcrd[2] = z + 1; |
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152 | if(int flag=wcsp2s(wcs, 1, 3, pixcrd, imgcrd, phi, theta, world, stat)>0){ |
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153 | std::cerr<<"ERROR <pixelToVelocity> : WCS Error Code = "<<flag<<": " |
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154 | <<wcs_errmsg[flag]<<std::endl; |
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155 | std::cerr<<" stat value is "<<stat[0]<<std::endl; |
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156 | } |
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157 | |
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158 | double vel = coordToVel(wcs, world[2], velUnits); |
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159 | |
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160 | delete [] stat; |
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161 | delete [] pixcrd; |
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162 | delete [] imgcrd; |
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163 | delete [] world; |
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164 | delete [] phi; |
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165 | delete [] theta; |
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166 | |
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167 | return vel; |
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168 | } |
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169 | |
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170 | double coordToVel(wcsprm *wcs, const double coord, string outputUnits) |
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171 | { |
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172 | /** |
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173 | * coordToVel(wcsprm *wcs, const double coord, string outputUnits) |
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174 | * Convert the wcs coordinate given by coord to a velocity in km/s. |
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175 | * Does this by checking the ztype parameter in wcs to see if it is FREQ or otherwise, |
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176 | * and converts accordingly. |
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177 | */ |
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178 | |
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179 | static int errmsg = 0; |
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180 | double scale, offset, power; |
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181 | int flag = wcsunits( wcs->cunit[2], outputUnits.c_str(), &scale, &offset, &power); |
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182 | |
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183 | if(flag>0){ |
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184 | if(errmsg==0){ |
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185 | std::cerr << "ERROR <coordToVel> : WCSUNITS Error Code = " << flag << ":" |
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186 | << wcsunits_errmsg[flag] << std::endl; |
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187 | if(flag==10) std::cerr << "Tried to get conversion from " << wcs->cunit[2] |
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188 | << " to " << outputUnits.c_str() << std::endl; |
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189 | std::cerr << "Using coordinate value instead\n"; |
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190 | errmsg = 1; |
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191 | } |
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192 | return coord; |
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193 | } |
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194 | else return pow( (coord*scale + offset), power); |
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195 | |
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196 | } |
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197 | |
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198 | double velToCoord(wcsprm *wcs, const float velocity, string outputUnits) |
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199 | { |
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200 | /** |
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201 | * velToCoord(wcsprm *wcs, const double coord) |
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202 | * Convert the velocity given to the appropriate world coordinate for wcs. |
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203 | * Does this by checking the ztype parameter in wcs to see if it is FREQ or otherwise, |
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204 | * and converts accordingly. |
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205 | */ |
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206 | |
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207 | double scale, offset, power; |
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208 | int flag = wcsunits( wcs->cunit[2], outputUnits.c_str(), &scale, &offset, &power); |
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209 | |
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210 | if(flag>0){ |
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211 | std::cerr << "ERROR <velToCoord> : WCSUNITS Error Code = " << flag << ":" |
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212 | << wcsunits_errmsg[flag] << std::endl; |
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213 | std::cerr << "Using coordinate value instead\n"; |
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214 | return velocity; |
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215 | } |
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216 | else return (pow(velocity, 1./power) - offset) / scale; |
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217 | |
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218 | } |
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