1 /*
2 * This file is part of Siril, an astronomy image processor.
3 * Copyright (C) 2005-2011 Francois Meyer (dulle at free.fr)
4 * Copyright (C) 2012-2021 team free-astro (see more in AUTHORS file)
5 * Reference site is https://free-astro.org/index.php/Siril
6 *
7 * Siril is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * Siril is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with Siril. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <glib.h>
22 #include <math.h>
23 #include <stdio.h>
24
25 #include "siril_world_cs.h"
26
27 struct _SirilWorldCS {
28 gdouble alpha;
29
30 gdouble delta;
31
32 gint ref_count; /* (atomic) */
33 };
34
siril_world_cs_alloc()35 static SirilWorldCS* siril_world_cs_alloc() {
36 SirilWorldCS *world_cs;
37
38 world_cs = g_slice_new0(SirilWorldCS);
39 world_cs->ref_count = 1;
40
41 return world_cs;
42 }
43
44
siril_world_cs_ref(SirilWorldCS * world_cs)45 SirilWorldCS *siril_world_cs_ref(SirilWorldCS *world_cs) {
46 g_return_val_if_fail(world_cs != NULL, NULL);
47 g_return_val_if_fail(world_cs->ref_count > 0, NULL);
48
49 g_atomic_int_inc(&world_cs->ref_count);
50
51 return world_cs;
52 }
53
siril_world_cs_unref(SirilWorldCS * world_cs)54 void siril_world_cs_unref(SirilWorldCS *world_cs) {
55 g_return_if_fail(world_cs != NULL);
56 g_return_if_fail(world_cs->ref_count > 0);
57
58 if (g_atomic_int_dec_and_test(&world_cs->ref_count)) {
59 g_slice_free(SirilWorldCS, world_cs);
60 }
61 }
62
siril_world_cs_new_from_a_d(gdouble alpha,gdouble delta)63 SirilWorldCS* siril_world_cs_new_from_a_d(gdouble alpha, gdouble delta) {
64 SirilWorldCS *world_cs;
65 /*
66 * make sure new RA lies in range 0 < RA < 360
67 */
68 if (alpha < 0) {
69 alpha += 360.0;
70 }
71 if (alpha >= 360.0) {
72 alpha -= 360.0;
73 }
74
75 /*
76 * make sure Dec lies in range -90 < Dec < +90
77 */
78 if (delta < -90) {
79 delta += 180;
80 }
81 if (delta > 90) {
82 delta -= 180;
83 }
84
85 world_cs = siril_world_cs_alloc();
86 world_cs->alpha = alpha;
87 world_cs->delta = delta;
88
89 return world_cs;
90 }
91
siril_world_cs_new_from_ra_dec(gdouble ra_h,gdouble ra_m,gdouble ra_s,gdouble dec_deg,gdouble dec_m,gdouble dec_s)92 SirilWorldCS* siril_world_cs_new_from_ra_dec(gdouble ra_h, gdouble ra_m, gdouble ra_s, gdouble dec_deg, gdouble dec_m, gdouble dec_s) {
93 SirilWorldCS *world_cs;
94
95 world_cs = siril_world_cs_alloc();
96
97 world_cs->alpha = ra_h * 15.0 + ra_m * 15.0 / 60.0 + ra_s * 15.0 / 3600.0;
98 if (dec_deg > 0) {
99 world_cs->delta = ((dec_s / 3600.0) + (dec_m / 60.0) + dec_deg);
100 } else {
101 world_cs->delta = (-(dec_s / 3600.0) - (dec_m / 60.0) + dec_deg);
102 }
103 return world_cs;
104 }
105
siril_world_cs_new_from_objct_ra_dec(gchar * objctra,gchar * objctdec)106 SirilWorldCS* siril_world_cs_new_from_objct_ra_dec(gchar *objctra, gchar *objctdec) {
107 SirilWorldCS *world_cs;
108 int ra_h, ra_m, dec_deg, dec_m;
109 gdouble ra_s, dec_s;
110 gboolean south;
111
112 sscanf(objctra, "%d %d %lf", &ra_h, &ra_m, &ra_s);
113 sscanf(objctdec, "%d %d %lf", &dec_deg, &dec_m, &dec_s);
114 south = objctdec[0] == '-';
115
116 world_cs = siril_world_cs_alloc();
117
118 world_cs->alpha = ra_h * 15.0 + ra_m * 15.0 / 60.0 + ra_s * 15.0 / 3600.0;
119 if ((dec_deg == 0 && !south) || dec_deg > 0) {
120 world_cs->delta = ((dec_s / 3600.0) + (dec_m / 60.0) + dec_deg);
121 } else {
122 world_cs->delta = (-(dec_s / 3600.0) - (dec_m / 60.0) + dec_deg);
123 }
124 return world_cs;
125 }
126
siril_world_cs_get_alpha(SirilWorldCS * world_cs)127 gdouble siril_world_cs_get_alpha(SirilWorldCS *world_cs) {
128 return world_cs->alpha;
129 }
130
siril_world_cs_get_delta(SirilWorldCS * world_cs)131 gdouble siril_world_cs_get_delta(SirilWorldCS *world_cs) {
132 return world_cs->delta;
133 }
134
siril_world_cs_delta_format(SirilWorldCS * world_cs,const gchar * format)135 gchar* siril_world_cs_delta_format(SirilWorldCS *world_cs, const gchar *format) {
136 g_return_val_if_fail(world_cs != NULL, NULL);
137 g_return_val_if_fail(format != NULL, NULL);
138 g_return_val_if_fail(g_utf8_validate (format, -1, NULL), NULL);
139
140 gchar sig = '+';
141 gdouble dec = world_cs->delta;
142
143 if (dec < 0) sig = '-';
144
145 dec = fabs(dec);
146
147 int degree = (int) dec;
148 int min = abs((int) ((dec - degree) * 60.0));
149 double sec = (fabs((dec - degree) * 60.0) - min) * 60.0;
150
151 gchar *ptr = g_strrstr(format, "lf");
152 if (ptr) { // floating point for second
153 return g_strdup_printf(format, sig, degree, min, sec);
154 }
155 return g_strdup_printf(format, sig, degree, min, (int) round(sec));
156 }
157
siril_world_cs_alpha_format(SirilWorldCS * world_cs,const gchar * format)158 gchar* siril_world_cs_alpha_format(SirilWorldCS *world_cs, const gchar *format) {
159 g_return_val_if_fail(world_cs != NULL, NULL);
160 g_return_val_if_fail(format != NULL, NULL);
161 g_return_val_if_fail(g_utf8_validate (format, -1, NULL), NULL);
162
163 gdouble ra = world_cs->alpha;
164
165 ra = fabs(ra);
166
167 int hour = (int)(ra / 15.0);
168 int min = (int)(((ra / 15.0) - hour) * 60.0);
169 double sec = ((((ra / 15.0) - hour) * 60.0) - min) * 60.0;
170
171 gchar *ptr = g_strrstr(format, "lf");
172 if (ptr) { // floating point for second
173 return g_strdup_printf(format, hour, min, sec);
174 }
175 return g_strdup_printf(format, hour, min, (int) round(sec));
176 }
177
siril_world_cs_get_ra_hour_min_sec(SirilWorldCS * world_cs,int * hour,int * min,double * sec)178 void siril_world_cs_get_ra_hour_min_sec(SirilWorldCS *world_cs, int *hour, int *min, double *sec) {
179 int h, m;
180 gdouble s;
181
182 h = (int)(world_cs->alpha / 15.0);
183 m = (int)(((world_cs->alpha / 15.0) - h) * 60.0);
184 s = ((((world_cs->alpha / 15.0) - h) * 60.0) - m) * 60.0;
185
186 if (hour)
187 *hour = h;
188 if (min)
189 *min = m;
190 if (sec)
191 *sec = s;
192 }
193
siril_world_cs_get_dec_deg_min_sec(SirilWorldCS * world_cs,int * deg,int * min,double * sec)194 void siril_world_cs_get_dec_deg_min_sec(SirilWorldCS *world_cs, int *deg, int *min, double *sec) {
195 int d, m;
196 gdouble s;
197
198 d = (int) world_cs->delta;
199 m = abs((int) ((world_cs->delta - d) * 60.0));
200 s = (fabs((world_cs->delta - d) * 60.0) - m) * 60.0;
201
202 if (deg)
203 *deg = d;
204 if (min)
205 *min = m;
206 if (sec)
207 *sec = s;
208 }
209