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
52
53
54
55
56
57
58
59
60
|
#include "camera_position.hpp"
#include "../geometry/lat_lng.hpp"
namespace mbgl {
namespace android {
jni::Object<CameraPosition> CameraPosition::New(jni::JNIEnv &env, mbgl::CameraOptions options) {
static auto constructor = CameraPosition::javaClass.GetConstructor<jni::Object<LatLng>, double, double, double>(env);
// wrap LatLng values coming from core
auto center = options.center.value();
center.wrap();
// convert bearing, measured in radians counterclockwise from true north.
// Wrapped to [−π rad, π rad). Android binding from 0 to 360 degrees
double bearing_degrees = -options.angle.value_or(0) * util::RAD2DEG;
while (bearing_degrees > 360) {
bearing_degrees -= 360;
}
while (bearing_degrees < 0) {
bearing_degrees += 360;
}
// convert tilt, core ranges from [0 rad, 1,0472 rad], android ranges from 0 to 60
double tilt_degrees = options.pitch.value_or(0) * util::RAD2DEG;
return CameraPosition::javaClass.New(env, constructor, LatLng::New(env, center), options.zoom.value_or(0), tilt_degrees, bearing_degrees);
}
mbgl::CameraOptions CameraPosition::getCameraOptions(jni::JNIEnv& env, jni::Object<CameraPosition> position) {
static auto bearing = CameraPosition::javaClass.GetField<jni::jdouble>(env, "bearing");
static auto target = CameraPosition::javaClass.GetField<jni::Object<LatLng>>(env, "target");
static auto tilt = CameraPosition::javaClass.GetField<jni::jdouble>(env, "tilt");
static auto zoom = CameraPosition::javaClass.GetField<jni::jdouble>(env, "zoom");
auto jtarget = position.Get(env, target);
auto center = LatLng::getLatLng(env, jtarget);
jni::DeleteLocalRef(env, jtarget);
return mbgl::CameraOptions {
center,
{},
{},
position.Get(env, zoom),
position.Get(env, bearing) * util::DEG2RAD,
position.Get(env, tilt)
};
}
void CameraPosition::registerNative(jni::JNIEnv &env) {
// Lookup the class
CameraPosition::javaClass = *jni::Class<CameraPosition>::Find(env).NewGlobalRef(env).release();
}
jni::Class<CameraPosition> CameraPosition::javaClass;
} // namespace android
} // namespace mb
|
