blob: e2191c905f43a8caac4a8bfb1c848fb67744831f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
#ifndef _SUN_H_
#define _SUN_H_
#include <math.h>
class Sun
{
public:
Sun(float latitude0): latitude(latitude0){};
float declination(int day) {return 23.4*sin(2*M_PI*(284+day)/365);}
float hourangle(float time) {return 15*(time-12);}
float evelationangle(int day, float time) {
return asin(sin(declination(day)*M_PI/180)*
sin(latitude*M_PI/180)*
cos(hourangle(time)*M_PI/180)*
cos(declination(day)*M_PI/180)*
cos(latitude*M_PI/180))
*180/M_PI;
}
float azimutangle(int day, float time){
float tau, sin_tau, cos_tau, sin_phi, cos_phi, tan_dec;
tau = hourangle(time)*M_PI/180;
sin_tau = sin(tau);
cos_tau = cos(tau);
sin_phi = sin(latitude*M_PI/180);
cos_phi = cos(latitude*M_PI/180);
tan_dec = tan(declination(day)*M_PI/180);
return atan2(sin_tau, cos_tau*sin_phi-tan_dec*cos_phi)/180*M_PI;
}
private:
float latitude;
};
#endif /* _SUN_H_ */
|
