[core] Improved label pitch-scaling: approximate collision box shapes based on tile distance from camera.

3 files changed, 8 insertions, 0 deletions

diff --git a/src/mbgl/tile/geometry_tile.cpp b/src/mbgl/tile/geometry_tile.cpp
index 4ab11d79fe..ad5c2edd4c 100644
--- a/src/mbgl/tile/geometry_tile.cpp
+++ b/src/mbgl/tile/geometry_tile.cpp
@@ -264,4 +264,8 @@ void GeometryTile::querySourceFeatures(
     }
 }
 
+float GeometryTile::yStretch() const {
+    return collisionTile->yStretch;
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/tile/geometry_tile.hpp b/src/mbgl/tile/geometry_tile.hpp
index 77202d20b6..3e2efe1093 100644
--- a/src/mbgl/tile/geometry_tile.hpp
+++ b/src/mbgl/tile/geometry_tile.hpp
@@ -86,6 +86,8 @@ public:
 
     void onError(std::exception_ptr);
     
+    float yStretch() const override;
+    
 protected:
     const GeometryTileData* getData() {
         return data.get();
diff --git a/src/mbgl/tile/tile.hpp b/src/mbgl/tile/tile.hpp
index a925d88af3..1898f76849 100644
--- a/src/mbgl/tile/tile.hpp
+++ b/src/mbgl/tile/tile.hpp
@@ -105,6 +105,8 @@ public:
 
     // Contains the tile ID string for painting debug information.
     std::unique_ptr<DebugBucket> debugBucket;
+    
+    virtual float yStretch() const { return 1.0f; }
 
 protected:
     bool triedOptional = false;