From c473805510435860624a4de2286be7a30bb87223 Mon Sep 17 00:00:00 2001
From: austin <austin@austinhoover.net>
Date: Sun, 1 Dec 2024 17:03:43 -0500
Subject: [PATCH] fluid chunk sleeping

---
 buildNumber.properties                        |  4 ++--
 src/fluid/includes/environment.h              |  1 +
 src/fluid/src/javainterface.c                 |  3 +++
 src/fluid/src/metadata/metadatacalc.c         |  4 ++++
 .../fluid/manager/ServerFluidChunk.java       | 21 +++++++++++++++++++
 5 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/buildNumber.properties b/buildNumber.properties
index 17ea0259..17466399 100644
--- a/buildNumber.properties
+++ b/buildNumber.properties
@@ -1,3 +1,3 @@
 #maven.buildNumber.plugin properties file
-#Sun Dec 01 16:31:44 EST 2024
-buildNumber=477
+#Sun Dec 01 16:56:17 EST 2024
+buildNumber=480
diff --git a/src/fluid/includes/environment.h b/src/fluid/includes/environment.h
index dc628966..9b7b8e1f 100644
--- a/src/fluid/includes/environment.h
+++ b/src/fluid/includes/environment.h
@@ -25,6 +25,7 @@ typedef struct {
     jfieldID chunkmaskJId;
     jfieldID updatedId;
     jfieldID totalDensityId;
+    jfieldID asleepId;
 } ServerFluidChunkLookupTable;
 
 /**
diff --git a/src/fluid/src/javainterface.c b/src/fluid/src/javainterface.c
index 0938baf7..88584b3a 100644
--- a/src/fluid/src/javainterface.c
+++ b/src/fluid/src/javainterface.c
@@ -113,6 +113,7 @@ JNIEXPORT void JNICALL Java_electrosphere_server_fluid_simulator_FluidAccelerate
     environment->lookupTable.serverFluidChunkTable.chunkmaskJId = (*env)->GetFieldID(env,fluidSimStorageClass,"chunkMask","I");
     environment->lookupTable.serverFluidChunkTable.totalDensityId = (*env)->GetFieldID(env,fluidSimStorageClass,"totalDensity","F");
     environment->lookupTable.serverFluidChunkTable.updatedId = (*env)->GetFieldID(env,fluidSimStorageClass,"updated","Z");
+    environment->lookupTable.serverFluidChunkTable.asleepId = (*env)->GetFieldID(env,fluidSimStorageClass,"asleep","Z");
 }
 
 /**
@@ -137,6 +138,7 @@ int readInChunks(JNIEnv * env, jobject chunkList, Environment * environment){
     jfieldID v0JId = environment->lookupTable.serverFluidChunkTable.v0JId;
     jfieldID w0JId = environment->lookupTable.serverFluidChunkTable.w0JId;
     jfieldID chunkmaskJId = environment->lookupTable.serverFluidChunkTable.chunkmaskJId;
+    jfieldID asleepId = environment->lookupTable.serverFluidChunkTable.asleepId;
 
     //the number of chunks
     numChunks = (*env)->CallIntMethod(env,chunkList,jListSize);
@@ -161,6 +163,7 @@ int readInChunks(JNIEnv * env, jobject chunkList, Environment * environment){
 
         //skip this chunk if the center array is not allocated (must not have been removed yet?)
         if(
+            (*env)->GetBooleanField(env,chunkJRaw,asleepId) == JNI_TRUE ||
             getBuffArr(dJId) == NULL ||
             (*env)->GetObjectArrayElement(env,getBuffArr(dJId),CENTER_LOC) == NULL ||
             (*env)->GetDirectBufferAddress(env,(*env)->GetObjectArrayElement(env,getBuffArr(dJId),CENTER_LOC)) == NULL
diff --git a/src/fluid/src/metadata/metadatacalc.c b/src/fluid/src/metadata/metadatacalc.c
index d32c439c..70f3d308 100644
--- a/src/fluid/src/metadata/metadatacalc.c
+++ b/src/fluid/src/metadata/metadatacalc.c
@@ -46,6 +46,10 @@ void updateMetadata(JNIEnv * env, int numChunks, Chunk ** passedInChunks, Enviro
         (*env)->SetBooleanField(env,jObj,updatedId,JNI_TRUE);
         (*env)->SetFloatField(env,jObj,totalDensityId,sum);
 
+        if(sum <= 0){
+            //sleep the chunk if it has no density
+            (*env)->SetBooleanField(env,jObj,environment->lookupTable.serverFluidChunkTable.asleepId,JNI_TRUE);
+        }
     }
 }
 
diff --git a/src/main/java/electrosphere/server/fluid/manager/ServerFluidChunk.java b/src/main/java/electrosphere/server/fluid/manager/ServerFluidChunk.java
index f0c356f8..8aa78531 100644
--- a/src/main/java/electrosphere/server/fluid/manager/ServerFluidChunk.java
+++ b/src/main/java/electrosphere/server/fluid/manager/ServerFluidChunk.java
@@ -137,6 +137,11 @@ public class ServerFluidChunk {
      */
     public boolean updated = false;
 
+    /**
+     * Tracks whether this chunk is asleep or not
+     */
+    public boolean asleep = false;
+
     /**
      * The total density of the chunk
      */
@@ -467,6 +472,22 @@ public class ServerFluidChunk {
     public boolean isAllocated(){
         return this.bWeights[CENTER_BUFF] != null;
     }
+    
+    /**
+     * Gets whether this chunk is asleep or not
+     * @return true if it is asleep, false otherwise
+     */
+    public boolean isAsleep() {
+        return asleep;
+    }
+
+    /**
+     * Sets whether this chunk is asleep or not
+     * @return true if it is asleep, false otherwise
+     */
+    public void setAsleep(boolean asleep) {
+        this.asleep = asleep;
+    }
 
     /**
      * Allocates the central arrays for this chunk