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1 | /* | |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <gtk/gtk.h> | |
23 | #include "coords.h" | |
24 | #include "vikcoord.h" | |
25 | ||
26 | /* all coord operations MUST BE ABSTRACTED!!! */ | |
27 | ||
28 | void vik_coord_convert(VikCoord *coord, VikCoordMode dest_mode) | |
29 | { | |
30 | static VikCoord tmp; | |
31 | if ( coord->mode != dest_mode ) | |
32 | { | |
33 | if ( dest_mode == VIK_COORD_LATLON ) { | |
34 | a_coords_utm_to_latlon ( (struct UTM *)coord, (struct LatLon *)&tmp ); | |
35 | *((struct LatLon *)coord) = *((struct LatLon *)&tmp); | |
36 | } else { | |
37 | a_coords_latlon_to_utm ( (struct LatLon *)coord, (struct UTM *)&tmp ); | |
38 | *((struct UTM *)coord) = *((struct UTM *)&tmp); | |
39 | } | |
40 | coord->mode = dest_mode; | |
41 | } | |
42 | } | |
43 | ||
44 | void vik_coord_copy_convert(const VikCoord *coord, VikCoordMode dest_mode, VikCoord *dest) | |
45 | { | |
46 | if ( coord->mode == dest_mode ) { | |
47 | *dest = *coord; | |
48 | } else { | |
49 | if ( dest_mode == VIK_COORD_LATLON ) | |
50 | a_coords_utm_to_latlon ( (struct UTM *)coord, (struct LatLon *)dest ); | |
51 | else | |
52 | a_coords_latlon_to_utm ( (struct LatLon *)coord, (struct UTM *)dest ); | |
53 | dest->mode = dest_mode; | |
54 | } | |
55 | } | |
56 | ||
57 | static gdouble vik_coord_diff_safe(const VikCoord *c1, const VikCoord *c2) | |
58 | { | |
59 | static struct LatLon a, b; | |
60 | vik_coord_to_latlon ( c1, &a ); | |
61 | vik_coord_to_latlon ( c2, &b ); | |
62 | return a_coords_latlon_diff ( &a, &b ); | |
63 | } | |
64 | ||
65 | gdouble vik_coord_diff(const VikCoord *c1, const VikCoord *c2) | |
66 | { | |
67 | if ( c1->mode == c2->mode ) | |
68 | return vik_coord_diff_safe ( c1, c2 ); | |
69 | if ( c1->mode == VIK_COORD_UTM ) | |
70 | return a_coords_utm_diff ( (const struct UTM *) c1, (const struct UTM *) c2 ); | |
71 | else | |
72 | return a_coords_latlon_diff ( (const struct LatLon *) c1, (const struct LatLon *) c2 ); | |
73 | } | |
74 | ||
75 | void vik_coord_load_from_latlon ( VikCoord *coord, VikCoordMode mode, const struct LatLon *ll ) | |
76 | { | |
77 | if ( mode == VIK_COORD_LATLON ) | |
78 | *((struct LatLon *)coord) = *ll; | |
79 | else | |
80 | a_coords_latlon_to_utm ( ll, (struct UTM *) coord ); | |
81 | coord->mode = mode; | |
82 | } | |
83 | ||
84 | void vik_coord_load_from_utm ( VikCoord *coord, VikCoordMode mode, const struct UTM *utm ) | |
85 | { | |
86 | if ( mode == VIK_COORD_UTM ) | |
87 | *((struct UTM *)coord) = *utm; | |
88 | else | |
89 | a_coords_utm_to_latlon ( utm, (struct LatLon *) coord ); | |
90 | coord->mode = mode; | |
91 | } | |
92 | ||
93 | void vik_coord_to_latlon ( const VikCoord *coord, struct LatLon *dest ) | |
94 | { | |
95 | if ( coord->mode == VIK_COORD_LATLON ) | |
96 | *dest = *((const struct LatLon *)coord); | |
97 | else | |
98 | a_coords_utm_to_latlon ( (const struct UTM *) coord, dest ); | |
99 | } | |
100 | ||
101 | void vik_coord_to_utm ( const VikCoord *coord, struct UTM *dest ) | |
102 | { | |
103 | if ( coord->mode == VIK_COORD_UTM ) | |
104 | *dest = *((const struct UTM *)coord); | |
105 | else | |
106 | a_coords_latlon_to_utm ( (const struct LatLon *) coord, dest ); | |
107 | } | |
108 | ||
109 | gboolean vik_coord_equals ( const VikCoord *coord1, const VikCoord *coord2 ) | |
110 | { | |
111 | if ( coord1->mode != coord2->mode ) | |
112 | return FALSE; | |
113 | if ( coord1->mode == VIK_COORD_LATLON ) | |
114 | return coord1->north_south == coord2->north_south && coord1->east_west == coord2->east_west; | |
115 | else /* VIK_COORD_UTM */ | |
116 | return coord1->utm_zone == coord2->utm_zone && coord1->north_south == coord2->north_south && coord1->east_west == coord2->east_west; | |
117 | } |