69 lines
3.5 KiB
C++
69 lines
3.5 KiB
C++
#include <mbgl/test/util.hpp>
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#include <mbgl/util/constants.hpp>
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#include <mbgl/util/geo.hpp>
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#include <mbgl/util/projection.hpp>
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#include <limits>
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using namespace mbgl;
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TEST(Projection, MetersPerPixelAtLatitude) {
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double zoom = 0;
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(0, zoom), 78271.516964020484);
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(-util::LATITUDE_MAX, zoom), 6752.2284729446501);
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(util::LATITUDE_MAX, zoom),
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Projection::getMetersPerPixelAtLatitude(-util::LATITUDE_MAX, zoom));
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zoom = 20;
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(0, zoom), 0.074645535434742435);
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(-util::LATITUDE_MAX, zoom), 0.0064394268731543065);
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(std::numeric_limits<double>::lowest(), zoom),
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Projection::getMetersPerPixelAtLatitude(std::numeric_limits<double>::max(), zoom));
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zoom = std::numeric_limits<double>::min();
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(0, zoom),
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Projection::getMetersPerPixelAtLatitude(0, util::MIN_ZOOM));
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zoom = std::numeric_limits<double>::lowest();
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(0, zoom),
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Projection::getMetersPerPixelAtLatitude(0, util::MIN_ZOOM));
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zoom = std::numeric_limits<double>::max();
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EXPECT_DOUBLE_EQ(Projection::getMetersPerPixelAtLatitude(0, zoom),
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Projection::getMetersPerPixelAtLatitude(0, util::MAX_ZOOM));
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}
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TEST(Projection, ProjectedMeters) {
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const auto southWest = LatLng { -util::LATITUDE_MAX, -util::LONGITUDE_MAX };
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const auto northEast = LatLng { util::LATITUDE_MAX, util::LONGITUDE_MAX };
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auto latLng = LatLng {};
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auto projectedMeters = Projection::projectedMetersForLatLng(latLng);
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EXPECT_EQ(projectedMeters.northing, projectedMeters.easting);
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EXPECT_EQ(latLng, Projection::latLngForProjectedMeters(projectedMeters));
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latLng = LatLng { std::numeric_limits<double>::lowest(), std::numeric_limits<double>::lowest() };
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projectedMeters = Projection::projectedMetersForLatLng(latLng);
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EXPECT_EQ(projectedMeters, Projection::projectedMetersForLatLng(southWest));
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EXPECT_DOUBLE_EQ(projectedMeters.northing, -20037508.342789274);
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EXPECT_DOUBLE_EQ(projectedMeters.easting, -20037508.342789244);
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latLng = LatLng { std::numeric_limits<double>::max(), std::numeric_limits<double>::max() };
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projectedMeters = Projection::projectedMetersForLatLng(latLng);
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EXPECT_EQ(projectedMeters, Projection::projectedMetersForLatLng(northEast));
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EXPECT_DOUBLE_EQ(projectedMeters.northing, -Projection::projectedMetersForLatLng(southWest).northing);
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EXPECT_DOUBLE_EQ(projectedMeters.easting, -Projection::projectedMetersForLatLng(southWest).easting);
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projectedMeters = ProjectedMeters { std::numeric_limits<double>::lowest(), std::numeric_limits<double>::lowest() };
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latLng = Projection::latLngForProjectedMeters(projectedMeters);
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EXPECT_EQ(latLng.latitude, -util::LATITUDE_MAX);
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EXPECT_EQ(latLng.longitude, -util::LONGITUDE_MAX);
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projectedMeters = ProjectedMeters { std::numeric_limits<double>::max(), std::numeric_limits<double>::max() };
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latLng = Projection::latLngForProjectedMeters(projectedMeters);
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EXPECT_EQ(latLng.latitude, util::LATITUDE_MAX);
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EXPECT_EQ(latLng.longitude, util::LONGITUDE_MAX);
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}
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