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#include <string.h> |
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#include <math.h> |
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#include <ctype.h> |
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|
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#include "sun.h" |
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#include "color.h" |
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|
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extern int jdate(int month, int day); |
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extern double stadj(int jd); |
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extern double sdec(int jd); |
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extern double salt(double sd, double st); |
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extern double sazi(double sd, double st); |
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|
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#ifndef PI |
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#define PI 3.14159265358979323846 |
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#endif |
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#define overcast ((skytype==S_OVER)|(skytype==S_UNIF)) |
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|
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double normsc(); |
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/* sun calculation constants */ |
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extern double s_latitude; |
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extern double s_longitude; |
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extern double s_meridian; |
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|
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#undef toupper |
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#define toupper(c) ((c) & ~0x20) /* ASCII trick to convert case */ |
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int dosun = 1; |
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double zenithbr = 0.0; |
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int u_zenith = 0; /* -1=irradiance, 1=radiance */ |
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double turbidity = 2.75; |
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double turbidity = 2.45; |
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double gprefl = 0.2; |
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/* computed values */ |
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double sundir[3]; |
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void printdefaults(void); |
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void userror(char *msg); |
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double normsc(void); |
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void cvthour(char *hs); |
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void printhead(register int ac, register char **av); |
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int cvthour(char *hs); |
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void printhead(int ac, char **av); |
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|
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|
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int |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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int got_meridian = 0; |
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int i; |
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|
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progname = argv[0]; |
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day = atoi(argv[2]); |
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if (day < 1 || day > 31) |
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userror("bad day"); |
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cvthour(argv[3]); |
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got_meridian = cvthour(argv[3]); |
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} |
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for (i = 4; i < argc; i++) |
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if (argv[i][0] == '-' || argv[i][0] == '+') |
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s_longitude = atof(argv[++i]) * (PI/180); |
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break; |
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case 'm': |
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if (got_meridian) { |
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++i; |
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break; /* time overrides */ |
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} |
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s_meridian = atof(argv[++i]) * (PI/180); |
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break; |
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default: |
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else |
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userror("bad option"); |
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|
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if (fabs(s_meridian-s_longitude) > 45*PI/180) |
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if (month && !tsolar && fabs(s_meridian-s_longitude) > 45*PI/180) |
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fprintf(stderr, |
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"%s: warning: %.1f hours btwn. standard meridian and longitude\n", |
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"%s: warning - %.1f hours btwn. standard meridian and longitude\n", |
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progname, (s_longitude-s_meridian)*12/PI); |
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|
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printhead(argc, argv); |
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/* intermediate sky approx. */ |
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{3.5556, -2.7152, -1.3081, 1.0660, 0.60227}, |
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}; |
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register double *nf; |
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double *nf; |
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double x, nsc; |
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register int i; |
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int i; |
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/* polynomial approximation */ |
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nf = nfc[skytype==S_INTER]; |
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x = (altitude - PI/4.0)/(PI/4.0); |
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} |
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|
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|
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void |
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int |
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cvthour( /* convert hour string */ |
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char *hs |
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) |
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{ |
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register char *cp = hs; |
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register int i, j; |
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char *cp = hs; |
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int i, j; |
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|
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if ( (tsolar = *cp == '+') ) cp++; /* solar time? */ |
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while (isdigit(*cp)) cp++; |
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} |
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while (isdigit(*cp)) cp++; |
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if (!*cp) |
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return; |
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return(0); |
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if (tsolar || !isalpha(*cp)) { |
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fprintf(stderr, "%s: bad time format: %s\n", progname, hs); |
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exit(1); |
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break; |
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if (!cp[j] && !tzone[i].zname[j]) { |
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s_meridian = tzone[i].zmer * (PI/180); |
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< |
return; |
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> |
return(1); |
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} |
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} while (tzone[i++].zname[0]); |
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|
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|
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void |
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printhead( /* print command header */ |
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< |
register int ac, |
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< |
register char **av |
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> |
int ac, |
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> |
char **av |
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|
) |
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{ |
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putchar('#'); |