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