1 | #include <iostream> |
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2 | #include <sstream> |
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3 | #include <math.h> |
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4 | #include <wcs.h> |
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5 | #include <wcsunits.h> |
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6 | #include <duchamp.hh> |
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7 | #include <Utils/utils.hh> |
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8 | |
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9 | int pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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10 | { |
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11 | /** |
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12 | * pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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13 | * Uses wcs to convert the three-dimensional pixel position referenced by pix |
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14 | * to world coordinates, which are placed in the array world[]. |
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15 | * Assumes that pix only has one point with an x,y,and z pixel positions. |
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16 | * Offsets these pixel values by 1 to account for the C arrays being indexed to 0. |
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17 | */ |
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18 | |
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19 | int nelem=3,npts=1,flag; |
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20 | |
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21 | double *newpix = new double[nelem*npts]; |
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22 | for(int i=0;i<nelem*npts;i++) newpix[i] = pix[i] + 1.; |
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23 | // correct from 0-indexed to 1-indexed pixel array |
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24 | |
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25 | int *stat = new int[npts]; |
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26 | double *imgcrd = new double[nelem*npts]; |
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27 | double *phi = new double[npts]; |
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28 | double *theta = new double[npts]; |
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29 | if(flag=wcsp2s(wcs, npts, nelem, newpix, imgcrd, phi, theta, world, stat)>0){ |
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30 | std::stringstream errmsg; |
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31 | errmsg << "WCS Error Code = " <<flag<<": " << wcs_errmsg[flag] |
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32 | << "\nstat value is " << stat[0] << std::endl; |
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33 | duchampError("pixToWCSSingle",errmsg.str()); |
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34 | } |
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35 | delete [] stat; |
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36 | delete [] imgcrd; |
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37 | delete [] phi; |
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38 | delete [] theta; |
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39 | delete [] newpix; |
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40 | return flag; |
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41 | } |
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42 | |
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43 | int wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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44 | { |
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45 | /** |
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46 | * wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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47 | * Uses wcs to convert the three-dimensional world coordinate position referenced by world |
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48 | * to pixel coordinates, which are placed in the array pix[]. |
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49 | * Assumes that world only has one point (three values eg. RA, Dec, Velocity) |
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50 | * Offsets the pixel values by 1 to account for the C arrays being indexed to 0. |
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51 | */ |
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52 | |
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53 | int nelem=3,npts=1,flag; |
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54 | int *stat = new int[npts]; |
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55 | double *imgcrd = new double[nelem*npts]; |
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56 | double *phi = new double[npts]; |
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57 | double *theta = new double[npts]; |
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58 | if(flag=wcss2p(wcs, npts, nelem, world, phi, theta, imgcrd, pix, stat)>0){ |
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59 | std::stringstream errmsg; |
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60 | errmsg << "WCS Error Code = " <<flag<<": " << wcs_errmsg[flag] |
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61 | << "\nstat value is " << stat[0] << std::endl; |
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62 | duchampError("wcsToPixSingle",errmsg.str()); |
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63 | } |
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64 | |
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65 | for(int i=0;i<nelem;i++) pix[i] -= 1.; // correct from 1-indexed to 0-indexed pixel array |
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66 | |
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67 | delete [] stat; |
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68 | delete [] imgcrd; |
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69 | delete [] phi; |
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70 | delete [] theta; |
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71 | return flag; |
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72 | } |
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73 | |
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74 | int pixToWCSMulti(wcsprm *wcs, const double *pix, double *world, const int npts) |
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75 | { |
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76 | /** |
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77 | * pixToWCSSingle(wcsprm *wcs, const double *pix, double *world) |
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78 | * Uses wcs to convert the three-dimensional pixel positions referenced by pix |
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79 | * to world coordinates, which are placed in the array world[]. |
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80 | * pix is assumed to hold the positions of npts points. |
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81 | * Offsets these pixel values by 1 to account for the C arrays being indexed to 0. |
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82 | */ |
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83 | |
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84 | int nelem=3,flag; |
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85 | |
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86 | double *newpix = new double[nelem*npts]; |
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87 | for(int i=0;i<nelem*npts;i++) newpix[i] = pix[i] + 1.; |
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88 | // correct from 0-indexed to 1-indexed pixel array |
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89 | |
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90 | int *stat = new int[npts]; |
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91 | double *imgcrd = new double[nelem*npts]; |
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92 | double *phi = new double[npts]; |
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93 | double *theta = new double[npts]; |
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94 | if(flag=wcsp2s(wcs, npts, nelem, newpix, imgcrd, phi, theta, world, stat)>0){ |
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95 | std::stringstream errmsg; |
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96 | errmsg << "WCS Error Code = " <<flag<<": " << wcs_errmsg[flag] |
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97 | << "\nstat value is " << stat[0] << std::endl; |
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98 | duchampError("pixToWCSMulti",errmsg.str()); |
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99 | } |
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100 | delete [] stat; |
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101 | delete [] imgcrd; |
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102 | delete [] phi; |
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103 | delete [] theta; |
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104 | delete [] newpix; |
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105 | return flag; |
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106 | } |
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107 | |
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108 | int wcsToPixMulti(wcsprm *wcs, const double *world, double *pix, const int npts) |
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109 | { |
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110 | /** |
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111 | * wcsToPixSingle(wcsprm *wcs, const double *world, double *pix) |
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112 | * Uses wcs to convert the three-dimensional world coordinate position referenced by world |
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113 | * to pixel coordinates, which are placed in the array pix[]. |
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114 | * world is assumed to hold the positions of npts points. |
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115 | * Offsets the pixel values by 1 to account for the C arrays being indexed to 0. |
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116 | */ |
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117 | |
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118 | int nelem=3,flag=0; |
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119 | int *stat = new int[npts]; |
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120 | double *imgcrd = new double[nelem*npts]; |
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121 | double *phi = new double[npts]; |
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122 | double *theta = new double[npts]; |
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123 | if(flag=wcss2p(wcs, npts, nelem, world, phi, theta, imgcrd, pix, stat)>0){ |
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124 | std::stringstream errmsg; |
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125 | errmsg << "WCS Error Code = " <<flag<<": " <<wcs_errmsg[flag] |
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126 | << "\nstat value is " << stat[0] << std::endl; |
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127 | duchampError("wcsToPixMulti",errmsg.str()); |
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128 | } |
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129 | |
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130 | for(int i=0;i<nelem;i++) pix[i] -= 1.; // correct from 1-indexed to 0-indexed pixel array |
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131 | |
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132 | delete [] stat; |
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133 | delete [] imgcrd; |
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134 | delete [] phi; |
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135 | delete [] theta; |
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136 | return flag; |
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137 | } |
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138 | |
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139 | double pixelToVelocity(wcsprm *wcs, double &x, double &y, double &z, string velUnits) |
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140 | { |
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141 | /** |
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142 | * pixelToVelocity(wcsprm *wcs, double &x, double &y, double &z, string velUnits) |
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143 | * Uses wcs to convert the three-dimensional pixel position (x,y,z) |
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144 | * to world coordinates. |
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145 | * Returns the velocity in the units given by velUnits. |
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146 | */ |
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147 | |
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148 | int *stat = new int[1]; |
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149 | double *pixcrd = new double[3]; |
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150 | double *imgcrd = new double[3]; |
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151 | double *world = new double[3]; |
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152 | double *phi = new double[1]; |
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153 | double *theta = new double[1]; |
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154 | // correct from 0-indexed to 1-indexed pixel array by adding 1 to pixel values. |
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155 | pixcrd[0] = x + 1; |
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156 | pixcrd[1] = y + 1; |
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157 | pixcrd[2] = z + 1; |
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158 | if(int flag=wcsp2s(wcs, 1, 3, pixcrd, imgcrd, phi, theta, world, stat)>0){ |
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159 | std::stringstream errmsg; |
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160 | errmsg <<"WCS Error Code = "<<flag<<": "<<wcs_errmsg[flag] |
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161 | << "\nstat value is "<<stat[0]<<std::endl; |
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162 | duchampError("pixelToVelocity",errmsg.str()); |
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163 | } |
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164 | |
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165 | double vel = coordToVel(wcs, world[2], velUnits); |
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166 | |
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167 | delete [] stat; |
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168 | delete [] pixcrd; |
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169 | delete [] imgcrd; |
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170 | delete [] world; |
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171 | delete [] phi; |
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172 | delete [] theta; |
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173 | |
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174 | return vel; |
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175 | } |
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176 | |
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177 | double coordToVel(wcsprm *wcs, const double coord, string outputUnits) |
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178 | { |
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179 | /** |
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180 | * coordToVel(wcsprm *wcs, const double coord, string outputUnits) |
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181 | * Convert the wcs coordinate given by coord to a velocity in km/s. |
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182 | * Does this by checking the ztype parameter in wcs to see if it is FREQ or otherwise, |
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183 | * and converts accordingly. |
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184 | */ |
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185 | |
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186 | static int errflag = 0; |
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187 | double scale, offset, power; |
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188 | int flag = wcsunits( wcs->cunit[2], outputUnits.c_str(), &scale, &offset, &power); |
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189 | |
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190 | if(flag>0){ |
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191 | if(errflag==0){ |
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192 | std::stringstream errmsg; |
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193 | errmsg << "WCSUNITS Error Code = " << flag << ":" |
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194 | << wcsunits_errmsg[flag]; |
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195 | if(flag==10) errmsg << "\nTried to get conversion from " << wcs->cunit[2] |
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196 | << " to " << outputUnits.c_str(); |
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197 | errmsg << "\nUsing coordinate value instead.\n"; |
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198 | duchampError("coordToVel", errmsg.str()); |
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199 | errflag = 1; |
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200 | } |
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201 | return coord; |
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202 | } |
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203 | else return pow( (coord*scale + offset), power); |
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204 | |
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205 | } |
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206 | |
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207 | double velToCoord(wcsprm *wcs, const float velocity, string outputUnits) |
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208 | { |
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209 | /** |
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210 | * velToCoord(wcsprm *wcs, const double coord) |
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211 | * Convert the velocity given to the appropriate world coordinate for wcs. |
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212 | * Does this by checking the ztype parameter in wcs to see if it is FREQ or otherwise, |
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213 | * and converts accordingly. |
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214 | */ |
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215 | |
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216 | double scale, offset, power; |
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217 | int flag = wcsunits( wcs->cunit[2], outputUnits.c_str(), &scale, &offset, &power); |
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218 | |
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219 | if(flag>0){ |
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220 | std::stringstream errmsg; |
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221 | errmsg << "WCSUNITS Error Code = " << flag << ":" |
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222 | << wcsunits_errmsg[flag] << "\nUsing coordinate value instead.\n"; |
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223 | duchampError("velToCoord",errmsg.str()); |
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224 | return velocity; |
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225 | } |
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226 | else return (pow(velocity, 1./power) - offset) / scale; |
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227 | |
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228 | } |
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