[ios, macos] More ways to reshape an MGLMultiPoint (#7251)

* [ios, macos] Completed API for mutating multipoints

Added the complete set of methods for mutating the vertices of an MGLMultiPoint. Also rewrote MGLMultiPoint documentation to refer to vertices instead of points.

* [ios, macos] Removed inaccurate MGLOverlay commentary

This paragraph is full of references to features that exist in MKOverlay but not MGLOverlay.

* [ios, macos] Lazily compute multipoint bounds

Invalidate the bounds whenever the coordinates change, but don’t recompute the bounds until they’re requested. Simplified -intersectsOverlayBounds: for immutable overlay classes.

Added a utility function for testing whether two MGLCoordinateBounds intersect, based on mbgl::LatLngBounds::intersects().

Removed unused color conversion code.

1 files changed, 8 insertions, 0 deletions

diff --git a/platform/darwin/src/MGLGeometry.h b/platform/darwin/src/MGLGeometry.h
index e2a4d818b9..8e36b86d96 100644
--- a/platform/darwin/src/MGLGeometry.h
+++ b/platform/darwin/src/MGLGeometry.h
@@ -62,6 +62,14 @@ NS_INLINE BOOL MGLCoordinateBoundsEqualToCoordinateBounds(MGLCoordinateBounds bo
             bounds1.ne.longitude == bounds2.ne.longitude);
 }
 
+/** Returns `YES` if the two coordinate bounds intersect. */
+NS_INLINE BOOL MGLCoordinateBoundsIntersectsCoordinateBounds(MGLCoordinateBounds bounds1, MGLCoordinateBounds bounds2) {
+    return (bounds1.ne.latitude  > bounds2.sw.latitude  &&
+            bounds1.sw.latitude  < bounds2.ne.latitude  &&
+            bounds1.ne.longitude > bounds2.sw.longitude &&
+            bounds1.sw.longitude < bounds2.ne.longitude);
+}
+
 /** Returns `YES` if the coordinate is within the coordinate bounds. */
 NS_INLINE BOOL MGLCoordinateInCoordinateBounds(CLLocationCoordinate2D coordinate, MGLCoordinateBounds bounds) {
     return (coordinate.latitude  >= bounds.sw.latitude  &&