TEST(Transform, Antimeridian) {
Transform transform;
transform.resize({ 1000, 1000 });
transform.jumpTo(CameraOptions().withCenter(LatLng()).withZoom(1.0));
// San Francisco
const LatLng coordinateSanFrancisco { 37.7833, -122.4167 };
ScreenCoordinate pixelSF = transform.latLngToScreenCoordinate(coordinateSanFrancisco);
ASSERT_DOUBLE_EQ(151.79249437176432, pixelSF.x);
ASSERT_DOUBLE_EQ(383.76720782527661, pixelSF.y);
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, -181.0 }));
ScreenCoordinate pixelSFLongest = transform.latLngToScreenCoordinate(coordinateSanFrancisco);
ASSERT_DOUBLE_EQ(-357.36306616412816, pixelSFLongest.x);
ASSERT_DOUBLE_EQ(pixelSF.y, pixelSFLongest.y);
LatLng unwrappedSF = coordinateSanFrancisco.wrapped();
unwrappedSF.unwrapForShortestPath(transform.getLatLng());
ScreenCoordinate pixelSFShortest = transform.latLngToScreenCoordinate(unwrappedSF);
ASSERT_DOUBLE_EQ(666.63694385219173, pixelSFShortest.x);
ASSERT_DOUBLE_EQ(pixelSF.y, pixelSFShortest.y);
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, 179.0 }));
pixelSFShortest = transform.latLngToScreenCoordinate(coordinateSanFrancisco);
ASSERT_DOUBLE_EQ(pixelSFLongest.x, pixelSFShortest.x);
ASSERT_DOUBLE_EQ(pixelSFLongest.y, pixelSFShortest.y);
// Waikiri
const LatLng coordinateWaikiri{ -16.9310, 179.9787 };
transform.jumpTo(CameraOptions().withCenter(coordinateWaikiri).withZoom(10.0));
ScreenCoordinate pixelWaikiri = transform.latLngToScreenCoordinate(coordinateWaikiri);
ASSERT_DOUBLE_EQ(500, pixelWaikiri.x);
ASSERT_DOUBLE_EQ(500, pixelWaikiri.y);
transform.jumpTo(CameraOptions().withCenter(LatLng { coordinateWaikiri.latitude(), 180.0213 }));
ScreenCoordinate pixelWaikiriLongest = transform.latLngToScreenCoordinate(coordinateWaikiri);
ASSERT_DOUBLE_EQ(524725.96438108233, pixelWaikiriLongest.x);
ASSERT_DOUBLE_EQ(pixelWaikiri.y, pixelWaikiriLongest.y);
LatLng unwrappedWaikiri = coordinateWaikiri.wrapped();
unwrappedWaikiri.unwrapForShortestPath(transform.getLatLng());
ScreenCoordinate pixelWaikiriShortest = transform.latLngToScreenCoordinate(unwrappedWaikiri);
ASSERT_DOUBLE_EQ(437.95925272648344, pixelWaikiriShortest.x);
ASSERT_DOUBLE_EQ(pixelWaikiri.y, pixelWaikiriShortest.y);
LatLng coordinateFromPixel = transform.screenCoordinateToLatLng(pixelWaikiriLongest);
ASSERT_NEAR(coordinateWaikiri.latitude(), coordinateFromPixel.latitude(), 1e-4);
ASSERT_NEAR(coordinateWaikiri.longitude(), coordinateFromPixel.longitude(), 1e-4);
transform.jumpTo(CameraOptions().withCenter(LatLng { coordinateWaikiri.latitude(), 180.0213 }));
pixelWaikiriShortest = transform.latLngToScreenCoordinate(coordinateWaikiri);
ASSERT_DOUBLE_EQ(pixelWaikiriLongest.x, pixelWaikiriShortest.x);
ASSERT_DOUBLE_EQ(pixelWaikiriLongest.y, pixelWaikiriShortest.y);
coordinateFromPixel = transform.screenCoordinateToLatLng(pixelWaikiriShortest);
ASSERT_NEAR(coordinateWaikiri.latitude(), coordinateFromPixel.latitude(), 1e-4);
ASSERT_NEAR(coordinateWaikiri.longitude(), coordinateFromPixel.longitude(), 1e-4);
}
TEST(Transform, PerspectiveProjection) {
LatLng loc;
Transform transform;
transform.resize({ 1000, 1000 });
// 0.9 rad ~ 51.56620156 deg
transform.jumpTo(CameraOptions().withCenter(LatLng { 38.0, -77.0 }).withZoom(10.0).withPitch(51.56620156));
// expected values are from mapbox-gl-js
loc = transform.getLatLng();
ASSERT_DOUBLE_EQ(-77, loc.longitude());
ASSERT_DOUBLE_EQ(38, loc.latitude());
loc = transform.getState().screenCoordinateToLatLng({ 0, 1000 });
ASSERT_NEAR(-77.59198961199148, loc.longitude(), 1e-6);
ASSERT_NEAR(38.74661326302018, loc.latitude(), 1e-6);
loc = transform.getState().screenCoordinateToLatLng({ 1000, 0 });
ASSERT_NEAR(-76.75823239205641, loc.longitude(), 1e-6);
ASSERT_NEAR(37.692872969426375, loc.latitude(), 1e-6);
ScreenCoordinate point = transform.getState().latLngToScreenCoordinate({38.74661326302018, -77.59198961199148});
ASSERT_NEAR(point.x, 0.0, 1e-5);
ASSERT_NEAR(point.y, 1000.0, 1e-4);
point = transform.getState().latLngToScreenCoordinate({37.692872969426375, -76.75823239205641});
ASSERT_NEAR(point.x, 1000.0, 1e-5);
ASSERT_NEAR(point.y, 0.0, 1e-4);
}
TEST(Transform, MoveBy) {
Transform transform;
transform.resize({ 1000, 1000 });
transform.jumpTo(CameraOptions().withCenter(LatLng()).withZoom(10.0));
LatLng trueCenter = transform.getLatLng();
ASSERT_DOUBLE_EQ(0, trueCenter.latitude());
ASSERT_DOUBLE_EQ(0, trueCenter.longitude());
ASSERT_DOUBLE_EQ(10, transform.getZoom());
for (uint8_t x = 0; x < 20; ++x) {
bool odd = x % 2;
bool forward = x % 10;
LatLng coordinate = transform.screenCoordinateToLatLng({ odd ? 400. : 600., forward ? 400. : 600 });
transform.moveBy({ odd ? 100. : -100., forward ? 100. : -100 });
trueCenter = transform.getLatLng();
ASSERT_NEAR(coordinate.latitude(), trueCenter.latitude(), 1e-8);
ASSERT_NEAR(coordinate.longitude(), trueCenter.longitude(), 1e-8);
}
// We have ~1.1 precision loss for each coordinate for 20 rounds of moveBy.
ASSERT_NEAR(0.0, trueCenter.latitude(), 1.1);
ASSERT_NEAR(0.0, trueCenter.longitude(), 1.1);
}
static Point<double> project_(const LatLng& latLng, double worldSize) {
const double latitude = util::clamp(latLng.latitude(), -util::LATITUDE_MAX, util::LATITUDE_MAX);
return Point<double> {
util::LONGITUDE_MAX + latLng.longitude(),
util::LONGITUDE_MAX - util::RAD2DEG * std::log(std::tan(M_PI / 4 + latitude * M_PI / util::DEGREES_MAX))
} * worldSize / util::DEGREES_MAX;
}
LatLng constrain(const LatLng& p) const {
if (contains(p)) {
return p;
}
return LatLng {
util::clamp(p.latitude(), sw.latitude(), ne.latitude()),
util::clamp(p.longitude(), sw.longitude(), ne.longitude())
};
}
static ProjectedMeters projectedMetersForLatLng(const LatLng& latLng) {
const double constrainedLatitude = util::clamp(latLng.latitude(), -util::LATITUDE_MAX, util::LATITUDE_MAX);
const double constrainedLongitude = util::clamp(latLng.longitude(), -util::LONGITUDE_MAX, util::LONGITUDE_MAX);
const double m = 1 - 1e-15;
const double f = util::clamp(std::sin(util::DEG2RAD * constrainedLatitude), -m, m);
const double easting = util::EARTH_RADIUS_M * constrainedLongitude * util::DEG2RAD;
const double northing = 0.5 * util::EARTH_RADIUS_M * std::log((1 + f) / (1 - f));
return ProjectedMeters(northing, easting);
}
TEST(Transform, UnwrappedLatLng) {
Transform transform;
transform.resize({ 1000, 1000 });
// 0.9 rad ~ 51.56620156 deg
transform.jumpTo(CameraOptions().withCenter(LatLng { 38.0, -77.0 }).withZoom(10.0).withPitch(51.56620156));
const TransformState& state = transform.getState();
LatLng fromGetLatLng = state.getLatLng();
ASSERT_DOUBLE_EQ(fromGetLatLng.latitude(), 38.0);
ASSERT_DOUBLE_EQ(fromGetLatLng.longitude(), -77.0);
LatLng fromScreenCoordinate = state.screenCoordinateToLatLng({ 500, 500 });
ASSERT_NEAR(fromScreenCoordinate.latitude(), 38.0, 1e-8);
ASSERT_NEAR(fromScreenCoordinate.longitude(), -77.0, 1e-8);
LatLng wrappedRightwards = state.screenCoordinateToLatLng(state.latLngToScreenCoordinate({ 38, 283 }));
ASSERT_NEAR(wrappedRightwards.latitude(), 38.0, 1e-8);
ASSERT_NEAR(wrappedRightwards.longitude(), 283.0, 1e-8);
wrappedRightwards.wrap();
ASSERT_NEAR(wrappedRightwards.longitude(), -77.0, 1e-8);
LatLng wrappedLeftwards = state.screenCoordinateToLatLng(state.latLngToScreenCoordinate({ 38, -437 }));
ASSERT_DOUBLE_EQ(wrappedLeftwards.latitude(), wrappedRightwards.latitude());
ASSERT_NEAR(wrappedLeftwards.longitude(), -437.0, 1e-8);
wrappedLeftwards.wrap();
ASSERT_NEAR(wrappedLeftwards.longitude(), -77.0, 1e-8);
}
TEST(Transform, Padding) {
Transform transform;
transform.resize({ 1000, 1000 });
ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude());
CameraOptions nonPaddedCameraOptions = CameraOptions().withCenter(LatLng { 10, -100 }).withZoom(10.0);
transform.jumpTo(nonPaddedCameraOptions);
const LatLng trueCenter = transform.getLatLng();
ASSERT_DOUBLE_EQ(10, trueCenter.latitude());
ASSERT_DOUBLE_EQ(-100, trueCenter.longitude());
ASSERT_DOUBLE_EQ(10, transform.getZoom());
const LatLng screenCenter = transform.screenCoordinateToLatLng({
1000.0 / 2.0,
1000.0 / 2.0,
});
const LatLng upperHalfCenter = transform.screenCoordinateToLatLng({
1000.0 / 2.0,
1000.0 * 0.25,
});
EdgeInsets padding(1000.0 / 2.0, 0, 0, 0);
// CameraOption center and zoom don't change when padding changes: center of
// viewport remains the same as padding defines viwport center offset in rendering.
CameraOptions paddedOptions = CameraOptions().withPadding(padding);
transform.jumpTo(paddedOptions);
const LatLng theSameCenter = transform.getLatLng();
ASSERT_DOUBLE_EQ(trueCenter.latitude(), theSameCenter.latitude());
ASSERT_DOUBLE_EQ(trueCenter.longitude(), theSameCenter.longitude());
// However, LatLng is now at the center of lower half - verify conversion
// from screen coordinate to LatLng.
const LatLng paddedLowerHalfScreenCenter = transform.screenCoordinateToLatLng({
1000.0 / 2.0,
1000.0 * 0.75,
});
ASSERT_NEAR(screenCenter.latitude(), paddedLowerHalfScreenCenter.latitude(), 1e-10);
ASSERT_NEAR(screenCenter.longitude(), paddedLowerHalfScreenCenter.longitude(), 1e-10);
// LatLng previously in upper half center, should now be under screen center.
const LatLng paddedScreenCenter = transform.screenCoordinateToLatLng({
1000.0 / 2.0,
1000.0 / 2.0,
});
ASSERT_NEAR(upperHalfCenter.latitude(), paddedScreenCenter.latitude(), 1e-10);
ASSERT_NEAR(upperHalfCenter.longitude(), paddedScreenCenter.longitude(), 1e-10);
}
TEST(Projection, Boundaries) {
LatLng sw { -90.0, -180.0 };
LatLng ne { 90.0, 180.0 };
const double minScale = std::pow(2, 0);
const double maxScale = std::pow(2, util::DEFAULT_MAX_ZOOM);
Point<double> projected {};
LatLng unprojected {};
projected = Projection::project(sw, minScale);
EXPECT_DOUBLE_EQ(projected.x, 0.0);
EXPECT_DOUBLE_EQ(projected.y, util::tileSize);
unprojected = Projection::unproject(projected, minScale);
EXPECT_DOUBLE_EQ(unprojected.latitude(), -util::LATITUDE_MAX);
EXPECT_DOUBLE_EQ(unprojected.longitude(), sw.longitude());
projected = Projection::project(sw, maxScale);
EXPECT_DOUBLE_EQ(projected.x, 0.0);
EXPECT_DOUBLE_EQ(projected.y, util::tileSize * maxScale);
unprojected = Projection::unproject(projected, maxScale);
EXPECT_DOUBLE_EQ(unprojected.latitude(), -util::LATITUDE_MAX);
EXPECT_DOUBLE_EQ(unprojected.longitude(), sw.longitude());
projected = Projection::project(ne, minScale);
EXPECT_DOUBLE_EQ(projected.x, util::tileSize);
ASSERT_NEAR(projected.y, 0.0, 1e-10);
unprojected = Projection::unproject(projected, minScale);
EXPECT_DOUBLE_EQ(unprojected.latitude(), util::LATITUDE_MAX);
EXPECT_DOUBLE_EQ(unprojected.longitude(), ne.longitude());
projected = Projection::project(ne, maxScale);
EXPECT_DOUBLE_EQ(projected.x, util::tileSize * maxScale);
ASSERT_NEAR(projected.y, 0.0, 1e-6);
unprojected = Projection::unproject(projected, maxScale);
EXPECT_DOUBLE_EQ(unprojected.latitude(), util::LATITUDE_MAX);
EXPECT_DOUBLE_EQ(unprojected.longitude(), ne.longitude());
}
void TransformState::setLatLngZoom(const LatLng& latLng, double zoom) {
LatLng constrained = latLng;
if (bounds) {
constrained = bounds->constrain(latLng);
}
double newScale = util::clamp(zoomScale(zoom), min_scale, max_scale);
const double newWorldSize = newScale * util::tileSize;
Bc = newWorldSize / util::DEGREES_MAX;
Cc = newWorldSize / util::M2PI;
const double m = 1 - 1e-15;
const double f = util::clamp(std::sin(util::DEG2RAD * constrained.latitude()), -m, m);
ScreenCoordinate point = {
-constrained.longitude() * Bc,
0.5 * Cc * std::log((1 + f) / (1 - f)),
};
setScalePoint(newScale, point);
}
void extend(const LatLng& point) {
sw = LatLng(std::min(point.latitude(), sw.latitude()),
std::min(point.longitude(), sw.longitude()));
ne = LatLng(std::max(point.latitude(), ne.latitude()),
std::max(point.longitude(), ne.longitude()));
}
TEST(Transform, LatLngBounds) {
const LatLng nullIsland {};
const LatLng sanFrancisco { 37.7749, -122.4194 };
Transform transform;
transform.resize({ 1000, 1000 });
transform.jumpTo(CameraOptions().withCenter(LatLng()).withZoom(transform.getState().getMaxZoom()));
// Default bounds.
ASSERT_EQ(transform.getState().getLatLngBounds(), LatLngBounds::unbounded());
ASSERT_EQ(transform.getLatLng(), nullIsland);
// Invalid bounds.
try {
transform.setLatLngBounds(LatLngBounds::empty());
ASSERT_TRUE(false) << "Should throw";
} catch (...) {
ASSERT_EQ(transform.getState().getLatLngBounds(), LatLngBounds::unbounded());
}
transform.jumpTo(CameraOptions().withCenter(sanFrancisco));
ASSERT_EQ(transform.getLatLng(), sanFrancisco);
// Single location.
transform.setLatLngBounds(LatLngBounds::singleton(sanFrancisco));
ASSERT_EQ(transform.getLatLng(), sanFrancisco);
// -1 | 0 | +1
// ┌───┬───┰───┬───┰───┬───┐
// │ │ ┃• │ ┃ │ │
// ├───┼───╂───┼───╂───┼───┤
// │ │ ┃▓▓▓│▓▓▓┃ │ │
// └───┴───┸───┴───┸───┴───┘
transform.setLatLngBounds(LatLngBounds::hull({ -90.0, -180.0 }, { 0.0, 180.0 }));
transform.jumpTo(CameraOptions().withCenter(sanFrancisco));
ASSERT_EQ(transform.getLatLng().latitude(), 0.0);
ASSERT_EQ(transform.getLatLng().longitude(), sanFrancisco.longitude());
// Try crossing the antimeridian from the left.
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, -200.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -180.0);
// Try crossing the antimeridian from the right.
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, 200.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng(LatLng::Unwrapped).longitude(), 180.0);
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -180.0);
// -1 | 0 | +1
// ┌───┬───┰───┬───┰───┬───┐
// │ │ ┃• │▓▓▓┃ │ │
// ├───┼───╂───┼───╂───┼───┤
// │ │ ┃ │▓▓▓┃ │ │
// └───┴───┸───┴───┸───┴───┘
transform.setLatLngBounds(LatLngBounds::hull({ -90.0, 0.0 }, { 90.0, 180.0 }));
transform.jumpTo(CameraOptions().withCenter(sanFrancisco));
ASSERT_EQ(transform.getLatLng().latitude(), sanFrancisco.latitude());
ASSERT_EQ(transform.getLatLng().longitude(), 0.0);
// -1 | 0 | +1
// ┌───┬───┰───┬───┰───┬───┐
// │ │ ┃• │ ┃ │ │
// ├───┼───╂───┼───╂───┼───┤
// │ │ ┃ │▓▓▓┃ │ │
// └───┴───┸───┴───┸───┴───┘
transform.setLatLngBounds(LatLngBounds::hull({ -90.0, 0.0 }, { 0.0, 180.0 }));
transform.jumpTo(CameraOptions().withCenter(sanFrancisco));
ASSERT_EQ(transform.getLatLng().latitude(), 0.0);
ASSERT_EQ(transform.getLatLng().longitude(), 0.0);
// -1 | 0 | +1
// ┌───┬───┰───┬───┰───┬───┐
// │ │ ┃ │ ▓┃▓ │ │
// ├───┼───╂───┼───╂───┼───┤
// │ │ ┃ │ ┃ │ │
// └───┴───┸───┴───┸───┴───┘
LatLng inside { 45.0, 150.0 };
transform.setLatLngBounds(LatLngBounds::hull({ 0.0, 120.0 }, { 90.0, 240.0 }));
transform.jumpTo(CameraOptions().withCenter(inside));
ASSERT_EQ(transform.getLatLng().latitude(), inside.latitude());
ASSERT_EQ(transform.getLatLng().longitude(), inside.longitude());
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, 140.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 140.0);
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, 160.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 160.0);
// Constrain latitude only.
transform.jumpTo(CameraOptions().withCenter(LatLng { -45.0, inside.longitude() }));
ASSERT_EQ(transform.getLatLng().latitude(), 0.0);
ASSERT_EQ(transform.getLatLng().longitude(), inside.longitude());
// Crossing the antimeridian, within bounds.
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), 181.0 }));
ASSERT_EQ(transform.getLatLng().longitude(), -179.0);
// Crossing the antimeridian, outside bounds.
transform.jumpTo(CameraOptions().withCenter(inside));
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), 250.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -120.0);
// Constrain to the left edge.
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), 119.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 120.0);
// Simulate swipe to the left.
mbgl::AnimationOptions easeOptions(mbgl::Seconds(1));
easeOptions.transitionFrameFn = [&](double /* t */) {
ASSERT_NEAR(transform.getLatLng().longitude(), 120.0, 1e-4);
};
easeOptions.transitionFinishFn = [&]() {
ASSERT_NEAR(transform.getLatLng().longitude(), 120.0, 1e-4);
};
transform.moveBy(ScreenCoordinate { -500, -500 }, easeOptions);
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(0));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(250));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(500));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(750));
transform.updateTransitions(transform.getTransitionStart() + transform.getTransitionDuration());
// Constrain to the right edge.
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), 241.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -120.0);
// Simulate swipe to the right.
easeOptions.transitionFrameFn = [&](double /* t */) {
ASSERT_NEAR(transform.getLatLng().longitude(), -120.0, 1e-4);
};
easeOptions.transitionFinishFn = [&]() {
ASSERT_NEAR(transform.getLatLng().longitude(), -120.0, 1e-4);
};
transform.moveBy(ScreenCoordinate { 500, 500 }, easeOptions);
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(0));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(250));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(500));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(750));
transform.updateTransitions(transform.getTransitionStart() + transform.getTransitionDuration());
// -1 | 0 | +1
// ┌───┬───┰───┬───┰───┬───┐
// │ │ ┃ │ ┃ │ │
// ├───┼───╂───┼───╂───┼───┤
// │ │ ▓┃▓ │ ┃ │ │
// └───┴───┸───┴───┸───┴───┘
inside = LatLng{ -45.0, -150.0 };
transform.setLatLngBounds(LatLngBounds::hull({ -90.0, -240.0 }, { 0.0, -120.0 }));
transform.jumpTo(CameraOptions().withCenter(inside));
ASSERT_DOUBLE_EQ(transform.getLatLng().latitude(), inside.latitude());
ASSERT_EQ(transform.getLatLng().longitude(), inside.longitude());
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, -140.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -140.0);
transform.jumpTo(CameraOptions().withCenter(LatLng { 0.0, -160.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -160.0);
// Constrain latitude only.
transform.jumpTo(CameraOptions().withCenter(LatLng { 45.0, inside.longitude() }));
ASSERT_EQ(transform.getLatLng().latitude(), 0.0);
ASSERT_EQ(transform.getLatLng().longitude(), inside.longitude());
// Crossing the antimeridian, within bounds.
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), -181.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().latitude(), inside.latitude());
ASSERT_EQ(transform.getLatLng().longitude(), 179.0);
// Crossing the antimeridian, outside bounds.
transform.jumpTo(CameraOptions().withCenter(inside));
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), -250.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 120.0);
// Constrain to the left edge.
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), -119.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -120.0);
transform.moveBy(ScreenCoordinate { -500, 0 });
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), -120.0);
// Constrain to the right edge.
transform.jumpTo(CameraOptions().withCenter(LatLng { inside.latitude(), -241.0 }));
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 120.0);
transform.moveBy(ScreenCoordinate { 500, 0 });
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 120.0);
}
TEST(Transform, Camera) {
Transform transform;
transform.resize({ 1000, 1000 });
const LatLng latLng1 { 45, 135 };
CameraOptions cameraOptions1 = CameraOptions().withCenter(latLng1).withZoom(20.0);
transform.jumpTo(cameraOptions1);
ASSERT_DOUBLE_EQ(latLng1.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng1.longitude(), transform.getLatLng().longitude());
ASSERT_DOUBLE_EQ(20, transform.getZoom());
const LatLng latLng2 { -45, -135 };
CameraOptions cameraOptions2 = CameraOptions().withCenter(latLng2).withZoom(10.0);
transform.jumpTo(cameraOptions2);
ASSERT_DOUBLE_EQ(latLng2.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng2.longitude(), transform.getLatLng().longitude());
ASSERT_DOUBLE_EQ(10, transform.getZoom());
AnimationOptions easeOptions(Seconds(1));
easeOptions.transitionFrameFn = [&](double t) {
ASSERT_TRUE(t >= 0 && t <= 1);
ASSERT_GE(latLng1.latitude(), transform.getLatLng().latitude());
ASSERT_LE(latLng1.longitude(), transform.getLatLng().longitude());
};
easeOptions.transitionFinishFn = [&]() {
ASSERT_DOUBLE_EQ(latLng1.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng1.longitude(), transform.getLatLng().longitude());
ASSERT_DOUBLE_EQ(20, transform.getZoom());
};
transform.easeTo(cameraOptions1, easeOptions);
ASSERT_TRUE(transform.inTransition());
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(250));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(500));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(750));
transform.updateTransitions(transform.getTransitionStart() + transform.getTransitionDuration());
ASSERT_FALSE(transform.inTransition());
AnimationOptions flyOptions(Seconds(1));
flyOptions.transitionFrameFn = [&](double t) {
ASSERT_TRUE(t >= 0 && t <= 1);
ASSERT_LE(latLng2.latitude(), transform.getLatLng().latitude());
ASSERT_GE(latLng2.longitude(), transform.getLatLng(LatLng::Unwrapped).longitude());
};
flyOptions.transitionFinishFn = [&]() {
// XXX Fix precision loss in flyTo:
// https://github.com/mapbox/mapbox-gl-native/issues/4298
ASSERT_DOUBLE_EQ(latLng2.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng2.longitude(), transform.getLatLng().longitude());
ASSERT_NEAR(10.0, transform.getZoom(), 1e-5);
};
transform.flyTo(cameraOptions2, flyOptions);
ASSERT_TRUE(transform.inTransition());
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(250));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(500));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(750));
transform.updateTransitions(transform.getTransitionStart() + transform.getTransitionDuration());
ASSERT_FALSE(transform.inTransition());
// Anchor and center points are mutually exclusive.
CameraOptions camera;
camera.center = LatLng { 0, 0 };
camera.anchor = ScreenCoordinate { 0, 0 }; // top-left
camera.zoom = transform.getState().getMaxZoom();
transform.easeTo(camera, AnimationOptions(Seconds(1)));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(250));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(500));
transform.updateTransitions(transform.getTransitionStart() + Milliseconds(750));
transform.updateTransitions(transform.getTransitionStart() + transform.getTransitionDuration());
ASSERT_DOUBLE_EQ(transform.getLatLng().latitude(), 0);
ASSERT_DOUBLE_EQ(transform.getLatLng().longitude(), 0);
}
TEST(Transform, Anchor) {
Transform transform;
transform.resize({ 1000, 1000 });
const LatLng latLng { 10, -100 };
const ScreenCoordinate anchorPoint = { 150, 150 };
transform.jumpTo(CameraOptions().withCenter(latLng).withZoom(10.0));
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
ASSERT_DOUBLE_EQ(10, transform.getZoom());
ASSERT_DOUBLE_EQ(0, transform.getBearing());
const LatLng anchorLatLng = transform.getState().screenCoordinateToLatLng(anchorPoint);
ASSERT_NE(latLng.latitude(), anchorLatLng.latitude());
ASSERT_NE(latLng.longitude(), anchorLatLng.longitude());
transform.jumpTo(CameraOptions().withCenter(latLng).withZoom(3.0));
ASSERT_DOUBLE_EQ(3, transform.getZoom());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withZoom(3.5));
ASSERT_DOUBLE_EQ(3.5, transform.getZoom());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withZoom(5.5).withAnchor(anchorPoint));
ASSERT_DOUBLE_EQ(5.5, transform.getZoom());
ASSERT_NE(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_NE(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withCenter(latLng).withZoom(3.0));
ASSERT_DOUBLE_EQ(3, transform.getZoom());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withZoom(5.0));
ASSERT_DOUBLE_EQ(5, transform.getZoom());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withZoom(7.0).withAnchor(anchorPoint));
ASSERT_DOUBLE_EQ(7, transform.getZoom());
ASSERT_NE(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_NE(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withCenter(latLng).withZoom(2.0));
ASSERT_DOUBLE_EQ(2, transform.getZoom());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withZoom(4.0));
ASSERT_DOUBLE_EQ(4, transform.getZoom());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withZoom(8.0).withAnchor(anchorPoint));
ASSERT_DOUBLE_EQ(8, transform.getZoom());
ASSERT_NE(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_NE(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withCenter(latLng).withZoom(10.0).withBearing(-45.0));
ASSERT_DOUBLE_EQ(M_PI_4, transform.getBearing());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withBearing(0.0));
ASSERT_DOUBLE_EQ(0, transform.getBearing());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withBearing(45.0).withAnchor(anchorPoint));
ASSERT_DOUBLE_EQ(-45.0 * util::DEG2RAD, transform.getBearing());
// Anchor coordinates are imprecise because we are converting from an integer pixel.
ASSERT_NEAR(anchorLatLng.latitude(), transform.getLatLng().latitude(), 0.5);
ASSERT_NEAR(anchorLatLng.longitude(), transform.getLatLng().longitude(), 0.5);
transform.jumpTo(CameraOptions().withCenter(latLng).withZoom(10.0).withPitch(10.0));
ASSERT_DOUBLE_EQ(10.0 * util::DEG2RAD, transform.getPitch());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withPitch(15.0));
ASSERT_DOUBLE_EQ(15.0 * util::DEG2RAD, transform.getPitch());
ASSERT_DOUBLE_EQ(latLng.latitude(), transform.getLatLng().latitude());
ASSERT_DOUBLE_EQ(latLng.longitude(), transform.getLatLng().longitude());
transform.jumpTo(CameraOptions().withPitch(20.0).withAnchor(anchorPoint));
ASSERT_DOUBLE_EQ(20.0 * util::DEG2RAD, transform.getPitch());
// Anchor coordinates are imprecise because we are converting from an integer pixel.
ASSERT_NEAR(anchorLatLng.latitude(), transform.getLatLng().latitude(), 0.5);
ASSERT_NEAR(anchorLatLng.longitude(), transform.getLatLng().longitude(), 0.5);
}
