[ios, macos] Added circle geometryupstream/1ec5-circle-2167

Added an MGLCircle class that generates a many-sided polygon under the hood.

1 files changed, 26 insertions, 0 deletions

diff --git a/platform/darwin/src/MGLCircle_Private.h b/platform/darwin/src/MGLCircle_Private.h
new file mode 100644
index 0000000000..ef8fb372bf
--- /dev/null
+++ b/platform/darwin/src/MGLCircle_Private.h
@@ -0,0 +1,26 @@
+#import "MGLCircle.h"
+
+#import <mbgl/annotation/annotation.hpp>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@protocol MGLMultiPointDelegate;
+
+@interface MGLCircle (Private)
+
+/**
+ The optimal number of vertices in the circle’s polygonal approximation.
+ */
+@property (nonatomic, readonly) NSUInteger numberOfVertices;
+
+/**
+ Returns a linear ring with the given number of vertices.
+ */
+- (mbgl::LinearRing<double>)linearRingWithNumberOfVertices:(NSUInteger)numberOfVertices;
+
+/** Constructs a circle annotation object, asking the delegate for style values. */
+- (mbgl::Annotation)annotationObjectWithDelegate:(id <MGLMultiPointDelegate>)delegate;
+
+@end
+
+NS_ASSUME_NONNULL_END