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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* gensky.c - program to generate sky functions. |
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* Our zenith is along the Z-axis, the X-axis |
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#include <stdio.h> |
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#include <stdlib.h> |
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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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#include "color.h" |
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extern char *strcpy(), *strcat(), *malloc(); |
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extern double stadj(), sdec(), sazi(), salt(); |
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extern double stadj(), sdec(), sazi(), salt(), tz2mer(); |
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#define PI 3.141592654 |
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#ifndef PI |
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#define PI 3.14159265358979323846 |
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#endif |
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#define DOT(v1,v2) (v1[0]*v2[0]+v1[1]*v2[1]+v1[2]*v2[2]) |
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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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#undef toupper |
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#define toupper(c) ((c) & ~0x20) /* ASCII trick to convert case */ |
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/* European and North American zones */ |
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struct { |
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char zname[8]; /* time zone name (all caps) */ |
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float zmer; /* standard meridian */ |
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} tzone[] = { |
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"YST", 135, "YDT", 120, |
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"PST", 120, "PDT", 105, |
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"MST", 105, "MDT", 90, |
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"CST", 90, "CDT", 75, |
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"EST", 75, "EDT", 60, |
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"AST", 60, "ADT", 45, |
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"NST", 52.5, "NDT", 37.5, |
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"GMT", 0, "BST", -15, |
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"CET", -15, "CEST", -30, |
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"EET", -30, "EEST", -45, |
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"AST", -45, "ADT", -60, |
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"GST", -60, "GDT", -75, |
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"IST", -82.5, "IDT", -97.5, |
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"JST", -135, "NDT", -150, |
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"NZST", -180, "NZDT", -195, |
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"", 0 |
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}; |
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/* required values */ |
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int month, day; /* date */ |
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double hour; /* time */ |
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else |
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userror("bad option"); |
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if (fabs(s_meridian-s_longitude) > 30*PI/180) |
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if (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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progname, (s_longitude-s_meridian)*12/PI); |
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st = hour + stadj(jd); |
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altitude = salt(sd, st); |
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azimuth = sazi(sd, st); |
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printf("# Local solar time: %.2f\n", st); |
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printf("# Solar altitude and azimuth: %.1f %.1f\n", |
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180./PI*altitude, 180./PI*azimuth); |
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} |
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char *hs; |
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{ |
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register char *cp = hs; |
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register int i, j; |
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while (*cp && *cp++ != ':') |
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; |
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if (*cp) |
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hour = atoi(hs) + atoi(cp)/60.0; |
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else |
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if (tsolar = *cp == '+') cp++; /* solar time? */ |
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while (isdigit(*cp)) cp++; |
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if (*cp == ':') |
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hour = atoi(hs) + atoi(++cp)/60.0; |
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else { |
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hour = atof(hs); |
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tsolar = *hs == '+'; |
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if (*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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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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} |
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i = 0; |
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do { |
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for (j = 0; cp[j]; j++) |
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if (toupper(cp[j]) != tzone[i].zname[j]) |
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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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} |
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} while (tzone[i++].zname[0]); |
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fprintf(stderr, "%s: unknown time zone: %s\n", progname, cp); |
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fprintf(stderr, "Known time zones:\n\t%s", tzone[0].zname); |
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for (i = 1; tzone[i].zname[0]; i++) |
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fprintf(stderr, " %s", tzone[i].zname); |
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putc('\n', stderr); |
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exit(1); |
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} |
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