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authorAsheem Mamoowala <asheem.mamoowala@mapbox.com>2017-12-18 17:11:43 -0800
committerAsheem Mamoowala <asheem.mamoowala@mapbox.com>2018-04-05 18:04:25 -0700
commitcc01781db7281032f8c0c5eae54281187522a861 (patch)
treec12b23f6b69f8499a4d3db476b0f30c693c654e2 /platform
parentdc495e1c9d831ccf928381845ffcb409c5d91271 (diff)
downloadqtlocation-mapboxgl-cc01781db7281032f8c0c5eae54281187522a861.tar.gz
[ios, macos] Projection Matrix and LatLng projection to Mercator methods
Diffstat (limited to 'platform')
-rw-r--r--platform/darwin/src/MGLGeometry.h13
-rw-r--r--platform/darwin/src/MGLGeometry.mm9
-rw-r--r--platform/darwin/src/MGLOpenGLStyleLayer.h2
-rw-r--r--platform/darwin/src/MGLOpenGLStyleLayer.mm12
-rw-r--r--platform/darwin/src/NSValue+MGLAdditions.h13
-rw-r--r--platform/darwin/src/NSValue+MGLAdditions.m10
-rw-r--r--platform/darwin/test/MGLGeometryTests.mm9
7 files changed, 68 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLGeometry.h b/platform/darwin/src/MGLGeometry.h
index 7c68033abf..5d8e7eccd5 100644
--- a/platform/darwin/src/MGLGeometry.h
+++ b/platform/darwin/src/MGLGeometry.h
@@ -14,6 +14,16 @@ typedef struct __attribute__((objc_boxable)) MGLCoordinateSpan {
CLLocationDegrees longitudeDelta;
} MGLCoordinateSpan;
+/* Defines a point on the map in Mercator projection for a specific zoom level. */
+typedef struct __attribute__((objc_boxable)) MGLMapPoint {
+ /** X coordinate representing a longitude in Mercator projection. */
+ CGFloat x;
+ /** Y coordinate representing a latitide in Mercator projection. */
+ CGFloat y;
+ /** Zoom level at which the X and Y coordinates are valid. */
+ CGFloat zoomLevel;
+} MGLMapPoint;
+
/**
Creates a new `MGLCoordinateSpan` from the given latitudinal and longitudinal
deltas.
@@ -181,4 +191,7 @@ NS_INLINE CLLocationDegrees MGLDegreesFromRadians(CGFloat radians) {
return radians * 180 / M_PI;
}
+/** Returns Mercator projection of a WGS84 coordinate at the specified zoom level. */
+extern MGL_EXPORT MGLMapPoint MGLMapPointMake(CLLocationCoordinate2D coordinate, double zoomLevel);
+
NS_ASSUME_NONNULL_END
diff --git a/platform/darwin/src/MGLGeometry.mm b/platform/darwin/src/MGLGeometry.mm
index 715a70f0b8..63886b6474 100644
--- a/platform/darwin/src/MGLGeometry.mm
+++ b/platform/darwin/src/MGLGeometry.mm
@@ -106,3 +106,12 @@ CGPoint MGLPointRounded(CGPoint point) {
#endif
return CGPointMake(round(point.x * scaleFactor) / scaleFactor, round(point.y * scaleFactor) / scaleFactor);
}
+
+MGLMapPoint MGLMapPointMake(CLLocationCoordinate2D coordinate, double zoomLevel) {
+ mbgl::Point<double> projectedCoordinate = mbgl::Projection::project(MGLLatLngFromLocationCoordinate2D(coordinate), std::pow(2.0, zoomLevel));
+ MGLMapPoint point;
+ point.x = projectedCoordinate.x;
+ point.y = projectedCoordinate.y;
+ point.zoomLevel = zoomLevel;
+ return point;
+}
diff --git a/platform/darwin/src/MGLOpenGLStyleLayer.h b/platform/darwin/src/MGLOpenGLStyleLayer.h
index 0b494e8062..50d226457f 100644
--- a/platform/darwin/src/MGLOpenGLStyleLayer.h
+++ b/platform/darwin/src/MGLOpenGLStyleLayer.h
@@ -1,5 +1,6 @@
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
+#import <QuartzCore/QuartzCore.h>
#import "MGLFoundation.h"
#import "MGLStyleValue.h"
@@ -17,6 +18,7 @@ typedef struct MGLStyleLayerDrawingContext {
CLLocationDirection direction;
CGFloat pitch;
CGFloat fieldOfView;
+ CATransform3D projectionMatrix;
} MGLStyleLayerDrawingContext;
MGL_EXPORT
diff --git a/platform/darwin/src/MGLOpenGLStyleLayer.mm b/platform/darwin/src/MGLOpenGLStyleLayer.mm
index bbd7422c74..2389888632 100644
--- a/platform/darwin/src/MGLOpenGLStyleLayer.mm
+++ b/platform/darwin/src/MGLOpenGLStyleLayer.mm
@@ -7,6 +7,17 @@
#include <mbgl/style/layers/custom_layer.hpp>
#include <mbgl/math/wrap.hpp>
+
+CATransform3D CATransform3DMake(std::array<double, 16> array) {
+ CATransform3D t = {
+ .m11 = array[0], .m12 = array[1], .m13 = array[2], .m14 = array[3],
+ .m21 = array[4], .m22 = array[5], .m23 = array[6], .m24 = array[7],
+ .m31 = array[8], .m32 = array[9], .m33 = array[10], .m34 = array[11],
+ .m41 = array[12], .m42 = array[13], .m43 = array[14], .m44 = array[15]
+ };
+ return t;
+}
+
class MGLOpenGLLayerHost : public mbgl::style::CustomLayerHost {
public:
MGLOpenGLLayerHost(MGLOpenGLStyleLayer *styleLayer) {
@@ -31,6 +42,7 @@ public:
.direction = mbgl::util::wrap(params.bearing, 0., 360.),
.pitch = static_cast<CGFloat>(params.pitch),
.fieldOfView = static_cast<CGFloat>(params.fieldOfView),
+ .projectionMatrix = CATransform3DMake(params.projectionMatrix)
};
[layer drawInMapView:layer.style.mapView withContext:drawingContext];
}
diff --git a/platform/darwin/src/NSValue+MGLAdditions.h b/platform/darwin/src/NSValue+MGLAdditions.h
index f3026a389f..9222f04620 100644
--- a/platform/darwin/src/NSValue+MGLAdditions.h
+++ b/platform/darwin/src/NSValue+MGLAdditions.h
@@ -29,6 +29,19 @@ NS_ASSUME_NONNULL_BEGIN
@property (readonly) CLLocationCoordinate2D MGLCoordinateValue;
/**
+ Creates a new value object containing the specified Mapbox map point structure.
+
+ @param point The value for the new object.
+ @return A new value object that contains the coordinate and zoom level information.
+ */
++ (instancetype)valueWithMGLMapPoint:(MGLMapPoint)point;
+
+/**
+ The Mapbox map point structure representation of the value.
+ */
+@property (readonly) MGLMapPoint MGLMapPointValue;
+
+/**
Creates a new value object containing the specified Mapbox coordinate span
structure.
diff --git a/platform/darwin/src/NSValue+MGLAdditions.m b/platform/darwin/src/NSValue+MGLAdditions.m
index 1383056944..b32445dab7 100644
--- a/platform/darwin/src/NSValue+MGLAdditions.m
+++ b/platform/darwin/src/NSValue+MGLAdditions.m
@@ -14,6 +14,16 @@
return coordinate;
}
++ (instancetype)valueWithMGLMapPoint:(MGLMapPoint)point {
+ return [self valueWithBytes:&point objCType:@encode(MGLMapPoint)];
+}
+
+-(MGLMapPoint) MGLMapPointValue {
+ MGLMapPoint point;
+ [self getValue:&point];
+ return point;
+}
+
+ (instancetype)valueWithMGLCoordinateSpan:(MGLCoordinateSpan)span {
return [self valueWithBytes:&span objCType:@encode(MGLCoordinateSpan)];
}
diff --git a/platform/darwin/test/MGLGeometryTests.mm b/platform/darwin/test/MGLGeometryTests.mm
index 1c85470188..57840d9953 100644
--- a/platform/darwin/test/MGLGeometryTests.mm
+++ b/platform/darwin/test/MGLGeometryTests.mm
@@ -163,4 +163,13 @@
[NSValue valueWithMGLCoordinate:quad.bottomRight],
@"Quad bottom right should be computed correctly.");
}
+
+- (void)testMGLMapPoint {
+ MGLMapPoint point = MGLMapPointMake(CLLocationCoordinate2DMake(37.936, -80.425), 0.0);
+
+ MGLMapPoint roundTrippedPoint = [NSValue valueWithMGLMapPoint:point].MGLMapPointValue;
+ XCTAssertEqual(point.x, roundTrippedPoint.x);
+ XCTAssertEqual(point.y, roundTrippedPoint.y);
+ XCTAssertEqual(point.zoomLevel, roundTrippedPoint.zoomLevel);
+}
@end