36 |
|
extern double s_meridian; |
37 |
|
/* required values */ |
38 |
|
int month, day; /* date */ |
39 |
< |
double hour; /* standard time */ |
39 |
> |
double hour; /* time */ |
40 |
> |
int tsolar; /* 0=standard, 1=solar */ |
41 |
|
double altitude, azimuth; /* or solar angles */ |
42 |
|
/* default values */ |
43 |
< |
int cloudy = 0; |
43 |
> |
int cloudy = 0; /* 1=standard, 2=uniform */ |
44 |
|
int dosun = 1; |
45 |
|
double zenithbr = -1.0; |
46 |
|
double turbidity = 2.75; |
59 |
|
int argc; |
60 |
|
char *argv[]; |
61 |
|
{ |
61 |
– |
extern double fabs(); |
62 |
|
int i; |
63 |
|
|
64 |
|
progname = argv[0]; |
74 |
|
month = 0; |
75 |
|
} else { |
76 |
|
month = atoi(argv[1]); |
77 |
+ |
if (month < 1 || month > 12) |
78 |
+ |
userror("bad month"); |
79 |
|
day = atoi(argv[2]); |
80 |
+ |
if (day < 1 || day > 31) |
81 |
+ |
userror("bad day"); |
82 |
|
hour = atof(argv[3]); |
83 |
+ |
if (hour < 0 || hour >= 24) |
84 |
+ |
userror("bad hour"); |
85 |
+ |
tsolar = argv[3][0] == '+'; |
86 |
|
} |
87 |
|
for (i = 4; i < argc; i++) |
88 |
|
if (argv[i][0] == '-' || argv[i][0] == '+') |
92 |
|
dosun = argv[i][0] == '+'; |
93 |
|
break; |
94 |
|
case 'c': |
95 |
< |
cloudy = 1; |
95 |
> |
cloudy = argv[i][0] == '+' ? 2 : 1; |
96 |
|
dosun = 0; |
97 |
|
break; |
98 |
|
case 't': |
141 |
|
|
142 |
|
jd = jdate(month, day); /* Julian date */ |
143 |
|
sd = sdec(jd); /* solar declination */ |
144 |
< |
st = hour + stadj(jd); /* solar time */ |
144 |
> |
if (tsolar) /* solar time */ |
145 |
> |
st = hour; |
146 |
> |
else |
147 |
> |
st = hour + stadj(jd); |
148 |
|
altitude = salt(sd, st); |
149 |
|
azimuth = sazi(sd, st); |
150 |
|
} |
156 |
|
if (zenithbr <= 0.0) |
157 |
|
if (cloudy) { |
158 |
|
zenithbr = 8.6*sundir[2] + .123; |
159 |
< |
zenithbr *= 1000.0/SKYEFFICACY; |
159 |
> |
zenithbr *= 1000.0/WHTEFFICACY; |
160 |
|
} else { |
161 |
|
zenithbr = (1.376*turbidity-1.81)*tan(altitude)+0.38; |
162 |
|
zenithbr *= 1000.0/SKYEFFICACY; |
165 |
|
zenithbr = 0.0; |
166 |
|
/* Compute horizontal radiance */ |
167 |
|
if (cloudy) { |
168 |
< |
groundbr = zenithbr*0.777778; |
168 |
> |
if (cloudy == 2) |
169 |
> |
groundbr = zenithbr; |
170 |
> |
else |
171 |
> |
groundbr = zenithbr*0.777778; |
172 |
|
printf("# Ground ambient level: %f\n", groundbr); |
173 |
|
} else { |
174 |
|
F2 = 0.274*(0.91 + 10.0*exp(-3.0*(PI/2.0-altitude)) + |
175 |
|
0.45*sundir[2]*sundir[2]); |
176 |
< |
groundbr = zenithbr*normsc(PI/2.0-altitude)/F2/PI; |
176 |
> |
groundbr = zenithbr*normsc(altitude)/F2/PI; |
177 |
|
printf("# Ground ambient level: %f\n", groundbr); |
178 |
|
if (sundir[2] > 0.0) { |
179 |
|
if (sundir[2] > .16) |
204 |
|
printf("2 skybright skybright.cal\n"); |
205 |
|
printf("0\n"); |
206 |
|
if (cloudy) |
207 |
< |
printf("3 1 %.2e %.2e\n", zenithbr, groundbr); |
207 |
> |
printf("3 %d %.2e %.2e\n", cloudy, zenithbr, groundbr); |
208 |
|
else |
209 |
|
printf("7 -1 %.2e %.2e %.2e %f %f %f\n", zenithbr, groundbr, |
210 |
|
F2, sundir[0], sundir[1], sundir[2]); |
213 |
|
|
214 |
|
printdefaults() /* print default values */ |
215 |
|
{ |
216 |
< |
if (cloudy) |
216 |
> |
if (cloudy == 1) |
217 |
|
printf("-c\t\t\t\t# Cloudy sky\n"); |
218 |
+ |
else if (cloudy == 2) |
219 |
+ |
printf("+c\t\t\t\t# Uniform cloudy sky\n"); |
220 |
|
else if (dosun) |
221 |
|
printf("+s\t\t\t\t# Sunny sky with sun\n"); |
222 |
|
else |