Split meshes by surface and tile

Tile is derived per face based on the first vertices point rounded to
roughly 1km.

1 files changed, 7 insertions, 1 deletions

diff --git a/game/terrain.h b/game/terrain.h
index 095b4ef..f5b1b32 100644
--- a/game/terrain.h
+++ b/game/terrain.h
@@ -37,7 +37,13 @@ private:
 		GLsizei count;
 	};
 
+	struct SurfaceKey {
+		const Surface * surface;
+		GlobalPosition2D basePosition;
+		bool operator<(const SurfaceKey &) const;
+	};
+
 	glBuffer verticesBuffer;
-	std::multimap<const Surface *, SurfaceArrayBuffer> meshes;
+	std::map<SurfaceKey, SurfaceArrayBuffer> meshes;
 	Texture::Ptr grass = std::make_shared<Texture>("grass.png");
 };