From efa2afa822d0c92e609396adec2a4d4655189cfb Mon Sep 17 00:00:00 2001
From: austin <austin@austinwhoover.com>
Date: Sun, 25 Feb 2024 21:16:29 -0500
Subject: [PATCH] Client entity culling

---
 .../client/scene/ClientSceneWrapper.java      | 19 +++++++++++++++++++
 .../client/sim/ClientFunctions.java           |  1 +
 .../client/terrain/cells/DrawCellManager.java |  9 +++++++++
 3 files changed, 29 insertions(+)

diff --git a/src/main/java/electrosphere/client/scene/ClientSceneWrapper.java b/src/main/java/electrosphere/client/scene/ClientSceneWrapper.java
index af0eb824..e85c7e4e 100644
--- a/src/main/java/electrosphere/client/scene/ClientSceneWrapper.java
+++ b/src/main/java/electrosphere/client/scene/ClientSceneWrapper.java
@@ -3,10 +3,16 @@ package electrosphere.client.scene;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
+import org.joml.Vector3d;
+
 import electrosphere.collision.CollisionEngine;
+import electrosphere.engine.Globals;
+import electrosphere.entity.ClientEntityUtils;
 import electrosphere.entity.Entity;
+import electrosphere.entity.EntityUtils;
 import electrosphere.entity.Scene;
 import electrosphere.logger.LoggerInterface;
+import electrosphere.server.terrain.manager.ServerTerrainChunk;
 
 /**
  * Wrapper around the scene object to provide lots of much needed client-specific utility
@@ -94,4 +100,17 @@ public class ClientSceneWrapper {
         return collisionEngine;
     }
 
+    /**
+     * Destroys all entities outside simulation range
+     */
+    public void destroyEntitiesOutsideSimRange(){
+        double cullRadius = Globals.drawCellManager.getDrawRadius() + ServerTerrainChunk.CHUNK_DIMENSION;
+        for(Entity entity : scene.getEntityList()){
+            Vector3d position = EntityUtils.getPosition(entity);
+            if(Globals.playerEntity != null && EntityUtils.getPosition(Globals.playerEntity).distance(position) > cullRadius){
+                EntityUtils.cleanUpEntity(entity);
+            }
+        }
+    }
+
 }
diff --git a/src/main/java/electrosphere/client/sim/ClientFunctions.java b/src/main/java/electrosphere/client/sim/ClientFunctions.java
index 582e8898..03d8c2cb 100644
--- a/src/main/java/electrosphere/client/sim/ClientFunctions.java
+++ b/src/main/java/electrosphere/client/sim/ClientFunctions.java
@@ -27,6 +27,7 @@ public class ClientFunctions {
     public static void runClientFunctions(){
         ClientTerrainManager.generateTerrainChunkGeometry();
         updateSkyboxPos();
+        Globals.clientSceneWrapper.destroyEntitiesOutsideSimRange();
         // updateCellManager();
     }
     
diff --git a/src/main/java/electrosphere/client/terrain/cells/DrawCellManager.java b/src/main/java/electrosphere/client/terrain/cells/DrawCellManager.java
index 69776fd3..4812a01b 100644
--- a/src/main/java/electrosphere/client/terrain/cells/DrawCellManager.java
+++ b/src/main/java/electrosphere/client/terrain/cells/DrawCellManager.java
@@ -423,6 +423,15 @@ public class DrawCellManager {
     }
 
 
+    /**
+     * Gets the draw radius
+     * @return the draw radius
+     */
+    public double getDrawRadius(){
+        return drawRadius;
+    }
+
+
     
 //    public