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Option to use float math instead of double
| 1 | /* |
| 2 | * Copyright (C) 2008 Till Harbaum <till@harbaum.org>. |
| 3 | * |
| 4 | * This file is part of OSM2Go. |
| 5 | * |
| 6 | * OSM2Go 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 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * OSM2Go 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 OSM2Go. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #ifndef POS_H |
| 21 | #define POS_H |
| 22 | |
| 23 | #include <math.h> |
| 24 | |
| 25 | #ifdef USE_FLOAT |
| 26 | /* use float instead of double on small machines */ |
| 27 | typedef float pos_float_t; |
| 28 | #else |
| 29 | typedef double pos_float_t; |
| 30 | #endif |
| 31 | |
| 32 | #ifndef NAN |
| 33 | #define NAN (0.0/0.0) |
| 34 | #endif |
| 35 | |
| 36 | /* equatorial radius in meters */ |
| 37 | #define POS_EQ_RADIUS (6378137.0) |
| 38 | #define KMPMIL (1.609344) |
| 39 | #define KM2MIL(a) ((a)/KMPMIL) |
| 40 | #define MIL2KM(a) ((a)*KMPMIL) |
| 41 | |
| 42 | #define DEG2RAD(a) ((a) * M_PI / 180.0) |
| 43 | #define RAD2DEG(a) ((a) * 180.0 / M_PI) |
| 44 | |
| 45 | /* global position */ |
| 46 | typedef struct pos { |
| 47 | pos_float_t lat, lon; |
| 48 | } pos_t; |
| 49 | |
| 50 | /* local position */ |
| 51 | typedef struct lpos { |
| 52 | gint x, y; |
| 53 | } lpos_t; |
| 54 | |
| 55 | struct bounds_s; |
| 56 | void pos2lpos(struct bounds_s *bounds, pos_t *pos, lpos_t *lpos); |
| 57 | void pos2lpos_center(pos_t *pos, lpos_t *lpos); |
| 58 | void lpos2pos(struct bounds_s *bounds, lpos_t *lpos, pos_t *pos); |
| 59 | |
| 60 | void pos_lat_str(char *str, int len, pos_float_t latitude); |
| 61 | void pos_lon_str(char *str, int len, pos_float_t longitude); |
| 62 | |
| 63 | pos_float_t pos_parse_lat(char *str); |
| 64 | pos_float_t pos_parse_lon(char *str); |
| 65 | |
| 66 | GtkWidget *pos_lat_entry_new(pos_float_t lat); |
| 67 | GtkWidget *pos_lon_entry_new(pos_float_t lon); |
| 68 | void pos_lat_entry_set(GtkWidget *label, pos_float_t lat); |
| 69 | void pos_lon_entry_set(GtkWidget *label, pos_float_t lon); |
| 70 | |
| 71 | GtkWidget *pos_lat_label_new(pos_float_t lat); |
| 72 | GtkWidget *pos_lon_label_new(pos_float_t lon); |
| 73 | void pos_lat_label_set(GtkWidget *label, pos_float_t lat); |
| 74 | void pos_lon_label_set(GtkWidget *label, pos_float_t lon); |
| 75 | |
| 76 | pos_float_t pos_lat_get(GtkWidget *widget); |
| 77 | pos_float_t pos_lon_get(GtkWidget *widget); |
| 78 | |
| 79 | gboolean pos_lat_valid(pos_float_t lat); |
| 80 | gboolean pos_lon_valid(pos_float_t lon); |
| 81 | |
| 82 | pos_float_t pos_parse_dist(char *str, gboolean is_mil); |
| 83 | void pos_dist_str(char *str, int len, pos_float_t dist, gboolean is_mil); |
| 84 | void pos_dist_entry_set(GtkWidget *entry, pos_float_t dist, gboolean is_mil); |
| 85 | pos_float_t pos_dist_get(GtkWidget *widget, gboolean is_mil); |
| 86 | |
| 87 | #endif // POS_H |