Line data    Source code

       1             : /*
       2             :  * location.cpp
       3             :  * Copyright (C) Andrew Tridgell 2011
       4             :  *
       5             :  * This file is free software: you can redistribute it and/or modify it
       6             :  * under the terms of the GNU General Public License as published by the
       7             :  * Free Software Foundation, either version 3 of the License, or
       8             :  * (at your option) any later version.
       9             :  *
      10             :  * This file is distributed in the hope that it will be useful, but
      11             :  * WITHOUT ANY WARRANTY; without even the implied warranty of
      12             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
      13             :  * See the GNU General Public License for more details.
      14             :  *
      15             :  * You should have received a copy of the GNU General Public License along
      16             :  * with this program.  If not, see <http://www.gnu.org/licenses/>.
      17             :  */
      18             : 
      19             : /*
      20             :  *  this module deals with calculations involving locations
      21             :  */
      22             : #include <stdlib.h>
      23             : #include "AP_Math.h"
      24             : #include "location.h"
      25             : 
      26             : // return bearing_rad in radians between two positions
      27      850793 : float get_bearing_rad(const Vector2f &origin, const Vector2f &destination)
      28             : {
      29      850793 :     return wrap_2PI(atan2f(destination.y - origin.y, destination.x - origin.x));
      30             : }
      31             : 
      32             : // return bearing_cd in centi-degrees between two positions
      33      460030 : float get_bearing_cd(const Vector2f &origin, const Vector2f &destination)
      34             : {
      35      460030 :     return rad_to_cd(get_bearing_rad(origin, destination));
      36             : }
      37             : 
      38             : // return true when lat and lng are within range
      39           9 : bool check_lat(float lat)
      40             : {
      41           9 :     return fabsf(lat) <= 90;
      42             : }
      43           9 : bool check_lng(float lng)
      44             : {
      45           9 :     return fabsf(lng) <= 180;
      46             : }
      47       19933 : bool check_lat(int32_t lat)
      48             : {
      49       19933 :     return labs(lat) <= 90*1e7;
      50             : }
      51       19930 : bool check_lng(int32_t lng)
      52             : {
      53       19930 :     return labs(lng) <= 180*1e7;
      54             : }
      55           0 : bool check_latlng(float lat, float lng)
      56             : {
      57           0 :     return check_lat(lat) && check_lng(lng);
      58             : }
      59        4465 : bool check_latlng(int32_t lat, int32_t lng)
      60             : {
      61        4465 :     return check_lat(lat) && check_lng(lng);
      62             : }
      63             :