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109 lines
4.4 KiB
C++
109 lines
4.4 KiB
C++
#include <mbgl/test/util.hpp>
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#include <mbgl/map/transform.hpp>
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#include <mbgl/map/transform_state.hpp>
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#include <mbgl/tile/tile.hpp>
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#include <mbgl/tile/tile_id.hpp>
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#include <mbgl/util/constants.hpp>
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#include <mbgl/util/geometry.hpp>
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#include <mbgl/util/tile_coordinate.hpp>
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using namespace mbgl;
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TEST(TileCoordinate, FromLatLng) {
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size_t changeCount = 0;
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struct TransformObserver : public mbgl::MapObserver {
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void onCameraWillChange(MapObserver::CameraChangeMode mode) final {
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if (mode == MapObserver::CameraChangeMode::Immediate && cameraWillChangeImmediateCallback) {
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cameraWillChangeImmediateCallback();
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}
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}
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void onCameraDidChange(MapObserver::CameraChangeMode mode) final {
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if (mode == MapObserver::CameraChangeMode::Immediate && cameraDidChangeImmediateCallback) {
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cameraDidChangeImmediateCallback();
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}
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}
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std::function<void()> cameraWillChangeImmediateCallback;
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std::function<void()> cameraDidChangeImmediateCallback;
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};
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TransformObserver observer;
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observer.cameraWillChangeImmediateCallback = [&]() {
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ASSERT_EQ(changeCount, 0u);
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++changeCount;
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};
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observer.cameraDidChangeImmediateCallback = [&]() {
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ASSERT_EQ(changeCount, 1u);
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};
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Transform transform(observer);
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const double max = util::tileSize_D;
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transform.resize({ static_cast<uint32_t>(max), static_cast<uint32_t>(max) });
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// Center, top-left, bottom-left, bottom-right, top-right edges.
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std::vector<std::pair<LatLng, ScreenCoordinate>> edges {
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{ {}, { max / 2.0, max / 2.0 } },
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{ { util::LATITUDE_MAX, -util::LONGITUDE_MAX }, { 0, max } },
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{ { -util::LATITUDE_MAX, -util::LONGITUDE_MAX }, { 0, 0 } },
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{ { -util::LATITUDE_MAX, util::LONGITUDE_MAX }, { max, 0 } },
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{ { util::LATITUDE_MAX, util::LONGITUDE_MAX }, { max, max } },
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};
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for (const auto& pair : edges) {
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const auto& latLng = pair.first;
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const auto& screenCoordinate = pair.second;
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const auto base = TileCoordinate::fromLatLng(0, latLng);
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// 16 is the maximum zoom level where we actually compute placements.
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for (uint8_t integerZoom = 0; integerZoom <= 16; ++integerZoom) {
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const double zoom = integerZoom;
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const double maxTilesPerAxis = std::pow(2.0, zoom);
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const Point<double> tilePoint = {
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latLng.longitude() == 0 ? 0.5 : latLng.longitude() == -util::LONGITUDE_MAX ? 0 : 1.0,
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latLng.latitude() == 0 ? 0.5 : latLng.latitude() == -util::LATITUDE_MAX ? 1.0 : 0,
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};
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const auto fromLatLng = TileCoordinate::fromLatLng(zoom, latLng);
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ASSERT_DOUBLE_EQ(fromLatLng.z, zoom);
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ASSERT_DOUBLE_EQ(fromLatLng.p.x, tilePoint.x * maxTilesPerAxis);
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ASSERT_NEAR(fromLatLng.p.y, tilePoint.y * maxTilesPerAxis, 1.0e-7);
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const auto fromScreenCoordinate = TileCoordinate::fromScreenCoordinate(transform.getState(), zoom, screenCoordinate);
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ASSERT_DOUBLE_EQ(fromScreenCoordinate.z, fromLatLng.z);
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ASSERT_NEAR(fromScreenCoordinate.p.x, fromLatLng.p.x, 0.99);
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ASSERT_NEAR(fromScreenCoordinate.p.y, fromLatLng.p.y, 0.99);
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const auto zoomed = base.zoomTo(zoom);
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ASSERT_DOUBLE_EQ(zoomed.z, zoom);
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ASSERT_DOUBLE_EQ(zoomed.p.x, fromLatLng.p.x);
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ASSERT_DOUBLE_EQ(zoomed.p.y, fromLatLng.p.y);
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}
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}
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}
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TEST(TileCoordinate, ToGeometryCoordinate) {
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std::vector<Point<double>> edges {
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{ 0.5, 0.5 }, { 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 }
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};
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for (uint8_t zoom = 0; zoom <= 16; ++zoom) {
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uint32_t maxTilesPerAxis = std::pow(2, zoom);
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for (const auto& edge : edges) {
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uint32_t tileX = edge.x == 0 ? 0 : edge.x == 1 ? maxTilesPerAxis - 1 : (maxTilesPerAxis / 2.0) - 1;
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uint32_t tileY = edge.y == 0 ? 0 : edge.y == 1 ? maxTilesPerAxis - 1 : (maxTilesPerAxis / 2.0) - 1;
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UnwrappedTileID unwrapped(0, CanonicalTileID { zoom, tileX, tileY });
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auto tilePointX = ((edge.x * maxTilesPerAxis) - tileX) * util::EXTENT;
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auto tilePointY = ((edge.y * maxTilesPerAxis) - tileY) * util::EXTENT;
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GeometryCoordinate point = TileCoordinate::toGeometryCoordinate(unwrapped, edge);
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ASSERT_DOUBLE_EQ(point.x, tilePointX);
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ASSERT_DOUBLE_EQ(point.y, tilePointY);
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}
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}
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}
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