[148] | 1 | #include <iostream> |
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| 2 | #include <stdlib.h> |
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| 3 | #include <time.h> |
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| 4 | #include <math.h> |
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[307] | 5 | #include <Devel/devel.hh> |
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[149] | 6 | #define WCSLIB_GETWCSTAB // define this so that we don't try and redefine |
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| 7 | // wtbarr (this is a problem when using gcc v.4+ |
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[148] | 8 | #include <fitsio.h> |
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| 9 | #include <string> |
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| 10 | using std::string; |
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| 11 | |
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| 12 | void addGaussian(float *array, long *dim, float *pos, float *fwhm, float norm); |
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| 13 | void write_header_info(fitsfile *fptr); |
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| 14 | int main() |
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| 15 | { |
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| 16 | |
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| 17 | srandom(37); |
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| 18 | long *dim = new long[3]; |
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| 19 | dim[0] = 100; |
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| 20 | dim[1] = 100; |
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| 21 | dim[2] = 128; |
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| 22 | int size = dim[0]*dim[1]*dim[2]; |
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| 23 | |
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| 24 | float *array = new float[size]; |
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| 25 | for(int i=0;i<size;i++) array[i] = getNormalRV(); |
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| 26 | float xpos[5] = {25.,75.,50.,25.,75.}; |
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| 27 | float ypos[5] = {25.,25.,50.,75.,75.}; |
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| 28 | float zpos[5] = {20.,42.,64.,86.,108.}; |
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| 29 | float fwhm[3] = {5.,5.,5.}; |
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| 30 | float pos[3]; |
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| 31 | for(int i=0;i<5;i++){ |
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| 32 | pos[0] = xpos[i]; |
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| 33 | pos[1] = ypos[i]; |
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| 34 | pos[2] = zpos[i]; |
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| 35 | addGaussian(array, dim, pos, fwhm, 10.); |
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| 36 | } |
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| 37 | |
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| 38 | int status = 0,bitpix; |
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| 39 | long *fpixel = new long[3]; |
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| 40 | for(int i=0;i<3;i++) fpixel[i]=1; |
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| 41 | fitsfile *fptr; |
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| 42 | string cubeName = "!verification/verificationCube.fits"; |
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| 43 | if( fits_create_file(&fptr,cubeName.c_str(),&status) ) |
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| 44 | fits_report_error(stderr, status); |
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| 45 | |
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| 46 | status = 0; |
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| 47 | if( fits_create_img(fptr, FLOAT_IMG, 3, dim, &status) ) |
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| 48 | fits_report_error(stderr, status); |
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| 49 | |
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| 50 | write_header_info(fptr); |
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| 51 | |
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| 52 | status = 0; |
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| 53 | if( fits_write_pix(fptr, TFLOAT, fpixel, size, array, &status) ) |
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| 54 | fits_report_error(stderr, status); |
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| 55 | |
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| 56 | status = 0; |
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| 57 | fits_close_file(fptr, &status); |
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| 58 | if (status){ |
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| 59 | std::cerr << "Error closing file: "; |
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| 60 | fits_report_error(stderr, status); |
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| 61 | } |
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| 62 | |
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| 63 | |
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| 64 | |
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| 65 | } |
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| 66 | |
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| 67 | void addGaussian(float *array, long *dim, float *pos, float *fwhm, float norm) |
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| 68 | { |
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| 69 | long size = dim[0] * dim[1] * dim[2]; |
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| 70 | float sigsig = fwhm[0]*fwhm[0] + fwhm[1]*fwhm[1] + fwhm[2]*fwhm[2]; |
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| 71 | |
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[784] | 72 | int x1 = int(std::max(0.,pos[0]-10.)); |
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| 73 | int x2 = int(std::min(float(dim[0]),pos[0]+11)); |
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| 74 | int y1 = int(std::max(0.,pos[1]-10.)); |
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| 75 | int y2 = int(std::min(float(dim[1]),pos[1]+11)); |
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| 76 | int z1 = int(std::max(0.,pos[2]-10.)); |
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| 77 | int z2 = int(std::min(float(dim[2]),pos[2]+11)); |
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[148] | 78 | |
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| 79 | for(int x=x1;x<x2;x++){ |
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| 80 | for(int y=y1;y<y2;y++){ |
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| 81 | for(int z=z1;z<z2;z++){ |
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| 82 | |
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| 83 | float distX = (x-pos[0])/fwhm[0]; |
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| 84 | float distY = (y-pos[1])/fwhm[1]; |
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| 85 | float distZ = (z-pos[2])/fwhm[2]; |
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| 86 | float gaussFlux = norm * exp( -1.*(distX*distX + |
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| 87 | distY*distY + |
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| 88 | distZ*distZ ) ); |
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| 89 | long loc = x + y*dim[0] + z*dim[0]*dim[1]; |
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| 90 | array[loc] += gaussFlux; |
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| 91 | } |
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| 92 | } |
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| 93 | } |
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| 94 | |
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| 95 | } |
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| 96 | |
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| 97 | void write_header_info(fitsfile *fptr) |
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| 98 | { |
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| 99 | int status = 0; |
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| 100 | float val; |
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| 101 | string str; |
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| 102 | val = 0.24; |
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| 103 | fits_write_key(fptr, TFLOAT, "BMAJ" , &val, "", &status); |
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| 104 | fits_write_key(fptr, TFLOAT, "BMIN" , &val, "", &status); |
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| 105 | val = 0.; |
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| 106 | fits_write_key(fptr, TFLOAT, "BPA" , &val, "", &status); |
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| 107 | str = "JY/BEAM"; |
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| 108 | fits_write_key(fptr, TSTRING, "BUNIT" , (char *)str.c_str(), "", &status); |
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| 109 | val = 2000.0; |
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| 110 | fits_write_key(fptr, TFLOAT, "EPOCH" , &val, "", &status); |
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| 111 | val = 180.0; |
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| 112 | fits_write_key(fptr, TFLOAT, "LONPOLE", &val, "", &status); |
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| 113 | |
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| 114 | /* First axis -- RA--SIN */ |
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| 115 | str = "RA---SIN"; |
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| 116 | fits_write_key(fptr, TSTRING, "CTYPE1", (char *)str.c_str(), "", &status); |
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| 117 | val = 90.5; |
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| 118 | fits_write_key(fptr, TFLOAT, "CRVAL1", &val, "", &status); |
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| 119 | val = -6.6666701e-2; |
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| 120 | fits_write_key(fptr, TFLOAT, "CDELT1", &val, "", &status); |
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| 121 | val = 0.; |
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| 122 | fits_write_key(fptr, TFLOAT, "CROTA1", &val, "", &status); |
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| 123 | val = 50.0; |
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| 124 | fits_write_key(fptr, TFLOAT, "CRPIX1", &val, "", &status); |
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| 125 | str = "DEG"; |
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| 126 | fits_write_key(fptr, TSTRING, "CUNIT1", (char *)str.c_str(), "", &status); |
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| 127 | |
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| 128 | /* Second axis -- DEC--SIN */ |
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| 129 | str = "DEC--SIN"; |
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| 130 | fits_write_key(fptr, TSTRING, "CTYPE2", (char *)str.c_str(), "", &status); |
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| 131 | val = -26.0; |
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| 132 | fits_write_key(fptr, TFLOAT, "CRVAL2", &val, "", &status); |
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| 133 | val = 6.6666701e-2; |
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| 134 | fits_write_key(fptr, TFLOAT, "CDELT2", &val, "", &status); |
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| 135 | val = 0.; |
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| 136 | fits_write_key(fptr, TFLOAT, "CROTA2", &val, "", &status); |
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| 137 | val = 50.0; |
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| 138 | fits_write_key(fptr, TFLOAT, "CRPIX2", &val, "", &status); |
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| 139 | str = "DEG"; |
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| 140 | fits_write_key(fptr, TSTRING, "CUNIT2", (char *)str.c_str(), "", &status); |
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| 141 | |
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| 142 | /* Third axis -- VELO-HEL */ |
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| 143 | str = "VELO-HEL"; |
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| 144 | fits_write_key(fptr, TSTRING, "CTYPE3", (char *)str.c_str(), "", &status); |
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| 145 | val = 0.; |
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| 146 | fits_write_key(fptr, TFLOAT, "CRVAL3", &val, "", &status); |
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| 147 | val = 1.3191321e+4; |
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| 148 | fits_write_key(fptr, TFLOAT, "CDELT3", &val, "", &status); |
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| 149 | val = 0.; |
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| 150 | fits_write_key(fptr, TFLOAT, "CROTA3", &val, "", &status); |
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[307] | 151 | // val = 64.0; |
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| 152 | val = 0.0; |
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[148] | 153 | fits_write_key(fptr, TFLOAT, "CRPIX3", &val, "", &status); |
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| 154 | str = "M/S"; |
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| 155 | fits_write_key(fptr, TSTRING, "CUNIT3", (char *)str.c_str(), "", &status); |
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| 156 | |
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| 157 | val = 1.420405751786E+09; |
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| 158 | fits_write_key(fptr, TFLOAT,"RESTFREQ", &val, "", &status); |
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| 159 | |
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| 160 | |
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| 161 | } |
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