Unload empty regions

2 files changed, 28 insertions, 3 deletions

diff --git a/src/main/java/makamys/lodmod/renderer/LODRegion.java b/src/main/java/makamys/lodmod/renderer/LODRegion.java
index 0dc49ea..2aff7a6 100644
--- a/src/main/java/makamys/lodmod/renderer/LODRegion.java
+++ b/src/main/java/makamys/lodmod/renderer/LODRegion.java
@@ -122,15 +122,32 @@ public class LODRegion {
 		return null;
 	}
 	
-	public void tick(Entity player) {
+	public boolean tick(Entity player) {
+	    int visibleChunks = 0;
 		for(int i = 0; i < 32; i++) {
 			for(int j = 0; j < 32; j++) {
 				LODChunk chunk = data[i][j];
 				if(chunk != null) {
 					chunk.tick(player);
+					if(chunk.visible) {
+					    visibleChunks++;
+					}
 				}
 			}
 		}
+		return visibleChunks > 0;
+	}
+	
+	public void destroy(Path saveDir) {
+	    save(saveDir);
+	    for(int i = 0; i < 32; i++) {
+            for(int j = 0; j < 32; j++) {
+                LODChunk chunk = data[i][j];
+                if(chunk != null) {
+                    LODMod.renderer.setVisible(chunk, false);
+                }
+            }
+        }
 	}
 	
 }
diff --git a/src/main/java/makamys/lodmod/renderer/LODRenderer.java b/src/main/java/makamys/lodmod/renderer/LODRenderer.java
index 91c0aee..6aac74a 100644
--- a/src/main/java/makamys/lodmod/renderer/LODRenderer.java
+++ b/src/main/java/makamys/lodmod/renderer/LODRenderer.java
@@ -130,8 +130,16 @@ public class LODRenderer {
                 lastSortX = player.posX;
                 lastSortY = player.posY;
                 lastSortZ = player.posZ;
-                
-                loadedRegionsMap.forEach((k, v) -> v.tick(player));
+                for(Iterator<ChunkCoordIntPair> it = loadedRegionsMap.keySet().iterator(); it.hasNext();) {
+                    ChunkCoordIntPair k = it.next();
+                    LODRegion v = loadedRegionsMap.get(k);
+                    
+                    if(!v.tick(player)) {
+                        System.out.println("unloading " + v);
+                        v.destroy(getSaveDir());
+                        it.remove();
+                    }
+                }
             }
         }
     }