[core] Add `symbol-placement: line-center`

- Remove unused/vestigial 'maxCameraDistance'
- Create a single collision circle for line labels that are less than half the width of a collision circle

1 files changed, 10 insertions, 0 deletions

diff --git a/src/mbgl/text/get_anchors.hpp b/src/mbgl/text/get_anchors.hpp
index 48f3013093..8fd22051a4 100644
--- a/src/mbgl/text/get_anchors.hpp
+++ b/src/mbgl/text/get_anchors.hpp
@@ -17,4 +17,14 @@ Anchors getAnchors(const GeometryCoordinates& line,
                    const float boxScale,
                    const float overscaling);
 
+optional<Anchor> getCenterAnchor(const GeometryCoordinates& line,
+                                 const float maxAngle,
+                                 const float textLeft,
+                                 const float textRight,
+                                 const float iconLeft,
+                                 const float iconRight,
+                                 const float glyphSize,
+                                 const float boxScale);
+    
+
 } // namespace mbgl