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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* Copyright 2016-2020 Uber Technologies, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/** @file geoCoord.h
* @brief Geodetic (lat/lon) functions.
*/
#ifndef GEOCOORD_H
#define GEOCOORD_H
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "constants.h"
#include "h3api.h"
/** epsilon of ~0.1mm in degrees */
#define EPSILON_DEG .000000001
/** epsilon of ~0.1mm in radians */
#define EPSILON_RAD (EPSILON_DEG * M_PI_180)
void setGeoDegs(GeoCoord* p, double latDegs, double lonDegs);
double constrainLat(double lat);
double constrainLng(double lng);
bool geoAlmostEqual(const GeoCoord* p1, const GeoCoord* p2);
bool geoAlmostEqualThreshold(const GeoCoord* p1, const GeoCoord* p2,
double threshold);
// Internal functions
double _posAngleRads(double rads);
void _setGeoRads(GeoCoord* p, double latRads, double lonRads);
double _geoAzimuthRads(const GeoCoord* p1, const GeoCoord* p2);
void _geoAzDistanceRads(const GeoCoord* p1, double az, double distance,
GeoCoord* p2);
#endif
|
