Only sort and render visible actorsoptimize-actor-draw

Speeds up rendering a lot in case of many offscreen actors, for example
when a heavy particle effect is running somewhere.

1 files changed, 13 insertions, 1 deletions

diff --git a/src/map.h b/src/map.h
index f3850722..06c593e1 100644
--- a/src/map.h
+++ b/src/map.h
@@ -74,6 +74,15 @@ class TileAnimation
 };
 
 /**
+ * Small struct to reference visible actors and their draw order.
+ */
+struct FringeActor
+{
+    int drawOrder;
+    Actor *actor;
+};
+
+/**
  * A map layer. Stores a grid of tiles and their offset, and implements layer
  * rendering.
  */
@@ -120,7 +129,7 @@ class MapLayer
                   int startX, int startY,
                   int endX, int endY,
                   int scrollX, int scrollY,
-                  const Actors &actors,
+                  const std::vector<FringeActor> &actors,
                   int debugFlags) const;
 
         bool isFringeLayer() const
@@ -418,5 +427,8 @@ class Map : public Properties
 
         std::map<int, TileAnimation> mTileAnimations;
 
+        // Array of visible actors, reused to reduce allocations
+        std::vector<FringeActor> mVisibleActors;
+
         int mMask = 1;
 };