1 | /* ------------------------------------------------------------------------- |
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2 | * tracemain_optF1v6.c |
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3 | * |
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4 | * --- main program for raytracing |
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5 | * |
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6 | * Copyright (c) 2000-2007 N.Sakaki, Y.Takizawa, Y.Kawasaki |
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7 | * All rights reserved. |
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8 | * $Id$ |
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9 | * ------------------------------------------------------------------------- |
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10 | */ |
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11 | #include <stdio.h> |
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12 | #include <stdlib.h> |
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13 | //#include <time.h> |
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14 | #include <math.h> |
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15 | #include <string.h> |
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16 | #include "EConst.hh" |
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17 | #include "EsafRandom.hh" |
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18 | #include "Mtrace_optF1v4.hh" |
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19 | #include "Mtracemain_optF1v4.hh" |
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20 | #define X 0 |
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21 | #define Y 1 |
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22 | #define Z 2 |
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23 | #define PX 3 |
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24 | #define PY 4 |
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25 | #define PZ 5 |
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26 | #define L 6 |
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27 | #define T 7 |
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28 | |
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29 | /* ------------------------------------------------------------------------- |
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30 | * int trace_main(tel_param *param, double ph_in[8], double ph_out[8], |
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31 | * FILE *fp) |
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32 | * |
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33 | * --- trace photons in the EUSO optics (Entrance to FS) |
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34 | * |
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35 | * [input value] |
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36 | * param : tel_param* to store the optics parameters |
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37 | * (see also in tracemain_optF1v2.h) |
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38 | * ph_in[]: info on injected photon |
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39 | * ph_out[]: info on output photon |
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40 | * ph_xx[0,1,2] : x,y,z position in mm |
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41 | * ph_xx[3,4,5] : x,y,z direction (unit vector) |
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42 | * ph_xx[6] : wavelength in nm |
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43 | * ph_xx[7] : time in ns |
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44 | * fp : FILE* for (error) message logging |
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45 | * |
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46 | * [return value] |
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47 | * 0: normal end |
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48 | * <0: error (see trace_optF1v2.h for more detail) |
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49 | * ------------------------------------------------------------------------- |
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50 | */ |
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51 | int Mtrace_main(Mtel_param *param, |
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52 | double ph_in[8], double ph_out[8], FILE *fplog) |
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53 | { |
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54 | static double *z0; |
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55 | static int N_FOCAL_SURFACE; |
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56 | static int fs_init=0; |
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57 | int j; |
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58 | int flg, fsloop; |
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59 | double r,r2,dist,xx,yy,zz; |
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60 | |
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61 | if(!fs_init) |
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62 | { |
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63 | fs_init=1; |
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64 | N_FOCAL_SURFACE=(int)(param->Mr_fs/MFS_DEF_STEP); |
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65 | z0=(double *)malloc(sizeof(double)*N_FOCAL_SURFACE); |
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66 | if(!z0) |
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67 | { |
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68 | fprintf(fplog,"Cannot allocate memory for array for focalsurface\n"); |
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69 | exit(-10); |
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70 | } |
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71 | for(j=0;j<N_FOCAL_SURFACE;j++) |
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72 | { |
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73 | r=(double)j*MFS_DEF_STEP; |
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74 | z0[j]=MFocalSurface(r,param); |
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75 | } |
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76 | } |
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77 | |
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78 | /* the contents of ph_in[] will be overwritten in trace_lens() */ |
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79 | flg=trace_lens(param,ph_in,ph_out,fplog); |
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80 | if(flg!=0) |
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81 | { |
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82 | #ifdef DEBUG |
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83 | if(fplog) |
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84 | fprintf(fplog,"flg=%d in trace_main\n",flg); |
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85 | #endif |
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86 | return flg; |
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87 | } |
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88 | else if(ph_out[PZ]<=0.0) |
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89 | { |
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90 | return (RT_ESCAPE_FROM_ENTRANCE+SURFACE1); |
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91 | } |
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92 | else /* ph_out[PZ]>0.0 */ |
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93 | { |
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94 | j=0; |
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95 | zz=z0[j]; |
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96 | r=1.0e30; |
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97 | fsloop=0; |
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98 | do { |
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99 | fsloop++; |
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100 | r2=r; |
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101 | |
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102 | dist=(zz-ph_out[Z])/ph_out[PZ]; |
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103 | xx=ph_out[PX]*dist+ph_out[X]; |
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104 | yy=ph_out[PY]*dist+ph_out[Y]; |
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105 | r=sqrt(xx*xx+yy*yy); /* distance to optical axis */ |
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106 | |
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107 | j=int(r/MFS_DEF_STEP); |
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108 | |
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109 | if(j>=N_FOCAL_SURFACE || j < 0)/*changed by francesco 15-01-2010*/ |
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110 | j=N_FOCAL_SURFACE-1; /* should be error? */ |
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111 | |
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112 | if(fabs(z0[j]-zz)<MFS_DEF_STEP) |
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113 | { |
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114 | if(r > param->Mr_fs) |
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115 | flg=1; /* out of focal surface */ |
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116 | else/*changed by francesco 15-01-2010*/ |
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117 | zz=MFocalSurface(r,param); |
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118 | } |
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119 | else |
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120 | zz=z0[j]; |
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121 | }while(fabs(r-r2)>MFS_TOLERANCE && !flg && fsloop<MFSLOOP_MAX); |
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122 | |
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123 | if(flg) |
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124 | { |
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125 | #ifdef DEBUG |
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126 | fprintf(stderr,"curpos(%.1f,%.1f,%.1f) vec(%.2f,%.2f,%.2f) " |
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127 | "est pos on FS(%.1f,%.1f,%.1f) r=%.1f\n", |
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128 | ph_out[X],ph_out[Y],ph_out[Z], |
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129 | ph_out[PX],ph_out[PY],ph_out[PZ], |
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130 | xx,yy,zz,r |
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131 | ); |
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132 | #endif |
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133 | return (SURFACE_FS+RT_OUT_OF_SURFACE1); |
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134 | } |
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135 | else if(fsloop>=MFSLOOP_MAX) |
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136 | { |
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137 | return (SURFACE_FS+RT_STRAY_LIGHT); |
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138 | } |
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139 | else |
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140 | { |
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141 | ph_out[X]=xx; |
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142 | ph_out[Y]=yy; |
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143 | ph_out[Z]=zz; |
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144 | ph_out[T]+=dist/EConst::Clight(); |
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145 | if(CheckRcut(param,ph_out,SURFACE_FS)) |
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146 | return (SURFACE_FS+RT_OUT_OF_SURFACE1); |
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147 | } |
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148 | } |
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149 | |
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150 | return 0; |
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151 | } |
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152 | |
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153 | /* ------------------------------------------------------------------------- |
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154 | * int read_tel_param(char *filename, tel_param *param, FILE *fplog) |
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155 | * |
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156 | * --- read optics parameters from a file |
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157 | * |
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158 | * [input value] |
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159 | * filename: the name of the file for optics parameters |
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160 | * param : pointer to tel_param structure (see also tracemain_optF1v2.h) |
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161 | * fplog : FILE* for (error) message logging |
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162 | * |
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163 | * [return value] |
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164 | * -1 : "(char *)filename" not found |
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165 | * 0 : normal end |
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166 | * ------------------------------------------------------------------------- |
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167 | */ |
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168 | int Mread_tel_param(const char *filename, Mtel_param *param, FILE *fplog) |
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169 | { |
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170 | FILE *fr; |
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171 | char buf[256],item[256]; |
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172 | double val; |
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173 | |
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174 | if(( fr=fopen(filename,"r") )==NULL) |
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175 | { |
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176 | if(fplog) |
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177 | fprintf(fplog,"Telescope parameter file %s cannot be opened.\n",filename); |
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178 | return -1; |
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179 | } |
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180 | while(fgets(buf,255,fr)) |
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181 | { |
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182 | if(buf[0]!=0 || buf[0]!='#') |
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183 | { |
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184 | sscanf(buf,"%255s",item); |
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185 | switch(item[0]) |
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186 | { |
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187 | case 'R': |
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188 | sscanf(buf,"%*s %lf",&val); |
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189 | switch(item[1]) |
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190 | { |
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191 | case '_': |
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192 | switch(item[2]) |
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193 | { |
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194 | case 'L': |
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195 | param->Mr_lens=val; |
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196 | break; |
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197 | case 'W': |
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198 | param->Mr_wall=val; |
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199 | break; |
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200 | case 'F': |
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201 | param->Mr_fs=val; |
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202 | break; |
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203 | case 'c': |
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204 | param->Mr_cut[item[5]-'0']=val; |
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205 | break; |
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206 | } |
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207 | break; |
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208 | case 'c': |
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209 | switch(item[2]) |
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210 | { |
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211 | case '1': |
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212 | param->MRc1=val; |
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213 | break; |
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214 | case '2': |
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215 | param->MRc2=val; |
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216 | break; |
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217 | case '3': |
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218 | param->MRc3=val; |
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219 | break; |
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220 | case '6': |
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221 | param->MRc6=val; |
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222 | break; |
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223 | case '7': |
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224 | param->MRc7=val; |
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225 | break; |
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226 | case 'D': |
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227 | param->MRcD=val; |
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228 | break; |
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229 | } |
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230 | break; |
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231 | } |
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232 | break; |
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233 | |
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234 | case 'S': |
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235 | sscanf(buf,"%*s %lf",&val); |
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236 | if(item[1]=='z') |
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237 | { |
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238 | switch(item[2]) |
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239 | { |
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240 | case '0': |
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241 | param->MSz0=val; |
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242 | break; |
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243 | case '1': |
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244 | param->MSz1=val; |
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245 | break; |
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246 | case '2': |
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247 | param->MSz2=val; |
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248 | break; |
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249 | case '3': |
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250 | param->MZc3=val; |
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251 | break; |
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252 | case '4': |
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253 | param->MSz4=val; |
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254 | break; |
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255 | case '6': |
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256 | param->MSz6=val; |
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257 | break; |
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258 | case '7': |
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259 | param->MSz7=val; |
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260 | break; |
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261 | case 'D': |
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262 | param->MZcD=val; |
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263 | break; |
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264 | } |
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265 | } |
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266 | break; |
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267 | |
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268 | case 'F': |
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269 | sscanf(buf,"%*s %lf",&val); |
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270 | switch(item[2]) |
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271 | { |
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272 | case '_': |
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273 | if(item[3]=='C') |
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274 | param->MFS_C=val; |
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275 | else if(item[3]=='K') |
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276 | param->MFS_K=val; |
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277 | else if(item[3]=='O') |
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278 | param->MFS_OFFSET=val; |
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279 | break; |
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280 | |
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281 | case 'A': |
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282 | param->MFSA=val; |
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283 | break; |
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284 | case 'B': |
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285 | param->MFSB=val; |
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286 | break; |
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287 | case 'C': |
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288 | param->MFSC=val; |
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289 | break; |
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290 | case 'D': |
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291 | param->MFSD=val; |
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292 | break; |
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293 | } |
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294 | break; |
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295 | |
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296 | case 'l': |
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297 | switch(item[1]) |
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298 | { |
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299 | case 'e': |
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300 | sscanf(buf,"%*s %255s",param->Mlens_dir); |
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301 | break; |
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302 | case 'a': |
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303 | sscanf(buf,"%*s %lf",¶m->Mlambda0); |
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304 | break; |
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305 | } |
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306 | break; |
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307 | } |
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308 | } |
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309 | } |
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310 | fclose(fr); |
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311 | |
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312 | param->MSz1 += param->MSz0; |
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313 | param->MSz2 += param->MSz0; |
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314 | param->MZc3 += param->MSz0; |
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315 | param->MSz4 += param->MSz0; |
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316 | param->MSz6 += param->MSz0; |
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317 | param->MSz7 += param->MSz0; |
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318 | param->MZcD += param->MSz0; |
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319 | |
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320 | param->MZc1 = param->MRc1+param->MSz1; |
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321 | param->MZc2 = param->MRc2+param->MSz2; |
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322 | param->MZc4 = param->MSz4; |
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323 | param->MZc6 = -param->MRc6+param->MSz6; |
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324 | param->MZc7 = -param->MRc7+param->MSz7; |
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325 | |
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326 | param->MFS_OFFSET += param->MSz0; |
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327 | |
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328 | param->Mr_cut[0]=3000.0; |
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329 | param->Mr_cut[5]=param->Mr_cut[4]; |
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330 | param->Mr_cut[2]=param->Mr_cut[1]; |
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331 | param->Mr_cut[7]=param->Mr_cut[6]; |
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332 | |
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333 | return 0; |
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334 | } |
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335 | |
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336 | /* ------------------------------------------------------------------------- |
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337 | * int print_param(tel_param *p) |
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338 | * |
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339 | * --- print optics parameters for debbuging purpose |
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340 | * |
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341 | * [input value] |
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342 | * p: pointer to tel_param structure |
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343 | * |
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344 | * [return value] |
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345 | * always 0 |
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346 | * |
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347 | * ------------------------------------------------------------------------- |
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348 | */ |
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349 | int Mprint_param(Mtel_param *p) |
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350 | { |
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351 | int i; |
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352 | |
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353 | printf("Mr_lens=%.3f ",p->Mr_lens); |
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354 | printf("Mr_wall=%.3f ",p->Mr_wall); |
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355 | printf("Mr_fs=%.3f\n",p->Mr_fs); |
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356 | printf("MRc1=%.5f ",p->MRc1); |
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357 | printf("MSz1=%.5f ",p->MSz1); |
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358 | printf("MZc1=%.5f\n",p->MZc1); |
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359 | |
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360 | printf("MRc2=%.5f ",p->MRc2); |
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361 | printf("MSz2=%.5f ",p->MSz2); |
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362 | printf("MZc2=%.5f\n",p->MZc2); |
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363 | |
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364 | printf("MSz4=%.5f ",p->MSz4); |
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365 | |
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366 | printf("MRc6=%.5f ",p->MRc6); |
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367 | printf("MSz6=%.5f ",p->MSz6); |
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368 | printf("MZc6=%.5f\n",p->MZc6); |
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369 | |
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370 | printf("MRc7=%.5f ",p->MRc7); |
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371 | printf("MSz7=%.5f ",p->MSz7); |
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372 | printf("MZc7=%.5f\n",p->MZc7); |
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373 | |
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374 | printf("Rc3=%.5f ",p->MRc3); |
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375 | printf("MSz1=%.5f ",p->MSz1); |
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376 | printf("MZc3=%.5f\n",p->MZc3); |
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377 | |
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378 | printf("dir=%s\n",p->Mlens_dir); |
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379 | |
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380 | printf("FS_C=%g ",p->MFS_C); |
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381 | printf("FS_K=%.2f\n",p->MFS_K); |
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382 | printf("FSA=%g ",p->MFSA); |
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383 | printf("FSB=%g ",p->MFSB); |
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384 | printf("FSC=%g ",p->MFSC); |
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385 | printf("FSD=%g ",p->MFSD); |
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386 | printf("FS_offset=%.2f\n",p->MFS_OFFSET); |
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387 | for(i=1;i<9;i++) |
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388 | printf("Rcut%d=%.2f\n",i,p->Mr_cut[i]); |
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389 | return 0; |
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390 | } |
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391 | |
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392 | /* ------------------------------------------------------------------------- |
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393 | * double FocalSurface(double r, tel_param *p) |
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394 | * |
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395 | * --- calculate the Focal surface height as a function of the radius |
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396 | * from the center |
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397 | * As photons move toward z>0, FS_C should always be negative. |
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398 | * |
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399 | * [input value] |
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400 | * r: radius in mm |
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401 | * p: pointer to tel_param structure (optics parameter) |
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402 | * |
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403 | * [return value] |
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404 | * relative height of FS to that at r=0 in mm |
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405 | * |
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406 | * ------------------------------------------------------------------------- |
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407 | */ |
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408 | /* photons move to the direction z>0 */ |
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409 | double MFocalSurface(double r /* mm */, Mtel_param *p) /* mm */ |
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410 | { |
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411 | double r2; |
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412 | |
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413 | r2=r*r; |
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414 | return r2*(p->MFS_C /(1.0+sqrt(1.0-(1.0 + p->MFS_K)* p->MFS_C * p->MFS_C *r2)) |
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415 | +r2*(p->MFSA +r2*(p->MFSB+r2*(p->MFSC + r2* p->MFSD))))+ p->MFS_OFFSET; |
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416 | } |
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