attempt to fix lighting not filling into other chunks

.idea/workspace.xml

@@ -4,14 +4,11 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="3ee4ea58-b8cf-44ca-b7e6-78580145f11f" name="Changes" comment="">
-      <change afterPath="$PROJECT_DIR$/app/src/main/java/OpenSimplex2S/OpenSimplex2S.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/gradle.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/gradle.xml" afterDir="false" />
+    <list default="true" id="3ee4ea58-b8cf-44ca-b7e6-78580145f11f" name="Changes" comment="add day night cycle">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/app/src/main/kotlin/App.kt" beforeDir="false" afterPath="$PROJECT_DIR$/app/src/main/kotlin/App.kt" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/app/src/main/kotlin/game/session/world/World.kt" beforeDir="false" afterPath="$PROJECT_DIR$/app/src/main/kotlin/game/session/world/World.kt" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/app/src/main/kotlin/game/session/world/chunk/Block/Block.kt" beforeDir="false" afterPath="$PROJECT_DIR$/app/src/main/kotlin/game/session/world/chunk/Block/Block.kt" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/app/src/main/kotlin/game/session/world/chunk/Chunk.kt" beforeDir="false" afterPath="$PROJECT_DIR$/app/src/main/kotlin/game/session/world/chunk/Chunk.kt" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/app/src/main/resources/shaders/fragment.glsl" beforeDir="false" afterPath="$PROJECT_DIR$/app/src/main/resources/shaders/fragment.glsl" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -48,18 +45,18 @@
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
-  <component name="GitHubPullRequestSearchHistory"><![CDATA[{
-  "lastFilter": {
-    "state": "OPEN",
-    "assignee": "Ugric"
+  <component name="GitHubPullRequestSearchHistory">{
+  &quot;lastFilter&quot;: {
+    &quot;state&quot;: &quot;OPEN&quot;,
+    &quot;assignee&quot;: &quot;Ugric&quot;
   }
-}]]></component>
-  <component name="GithubPullRequestsUISettings"><![CDATA[{
-  "selectedUrlAndAccountId": {
-    "url": "https://github.com/Ugric/Buildtopia.git",
-    "accountId": "ed661211-7f8d-432e-83b1-f70982628276"
+}</component>
+  <component name="GithubPullRequestsUISettings">{
+  &quot;selectedUrlAndAccountId&quot;: {
+    &quot;url&quot;: &quot;https://github.com/Ugric/Buildtopia.git&quot;,
+    &quot;accountId&quot;: &quot;cf480e3a-7ef7-48e9-9a4c-558037d16cda&quot;
   }
-}]]></component>
+}</component>
   <component name="GradleScriptDefinitionsStorage" workingDir="$PROJECT_DIR$" gradleHome="$USER_HOME$/.gradle/wrapper/dists/gradle-8.14-bin/38aieal9i53h9rfe7vjup95b9/gradle-8.14" javaHome="$APPLICATION_HOME_DIR$/jbr" gradleVersion="8.14" />
   <component name="ProblemsViewState">
     <option name="selectedTabId" value="CurrentFile" />
@@ -88,7 +85,7 @@
         <option name="executionName" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="externalSystemIdString" value="GRADLE" />
-        <option name="scriptParameters" value="" />
+        <option name="scriptParameters" value="--info" />
         <option name="taskDescriptions">
           <list />
         </option>
@@ -119,6 +116,19 @@
       <option name="presentableId" value="Default" />
       <updated>1759316074199</updated>
     </task>
+    <task id="LOCAL-00001" summary="add day night cycle">
+      <option name="closed" value="true" />
+      <created>1759321116341</created>
+      <option name="number" value="00001" />
+      <option name="presentableId" value="LOCAL-00001" />
+      <option name="project" value="LOCAL" />
+      <updated>1759321116341</updated>
+    </task>
+    <option name="localTasksCounter" value="2" />
     <servers />
   </component>
+  <component name="VcsManagerConfiguration">
+    <MESSAGE value="add day night cycle" />
+    <option name="LAST_COMMIT_MESSAGE" value="add day night cycle" />
+  </component>
 </project>

app/src/main/kotlin/App.kt

@@ -1,9 +1,7 @@
 package dev.wbell.buildtopia.app
 
 import dev.wbell.buildtopia.app.game.Game
-import org.joml.Matrix4d
 import org.joml.Matrix4f
-import org.joml.Vector3d
 import org.lwjgl.glfw.GLFW.*
 import org.lwjgl.opengl.GL11.*
 import org.lwjgl.opengl.GL20.*

app/src/main/kotlin/game/session/world/World.kt

@@ -71,6 +71,10 @@ class World(val player: Player, val session: Session) {
                         })
             }
         }
+    }
+
+    fun init() {
+
         startPhysics()
         startChunkRenderer()
     }

app/src/main/kotlin/game/session/world/chunk/Chunk.kt

@@ -41,21 +41,19 @@ class ChunkSection(val blockData: Array<Block?>, val chunk: Chunk, val index: In
     val sunLightData = ByteArray(LENGTH * LENGTH * LENGTH / 2) { 0xff.toByte() }
     val blockLightData = ByteArray(LENGTH * LENGTH * LENGTH / 2) { 0 }
 
-    fun calculateLighting() {
-        var updated = false
-
+    fun calculateVerticalSunlight() {
         // 1. Initialize sunlight in this chunk top-down
         for (y in LENGTH - 1 downTo 0) {
             val worldY = y + index * LENGTH - chunk.ySectionsOffset * LENGTH
             for (x in 0 until LENGTH) {
                 for (z in 0 until LENGTH) {
-                    val before = sunLights[x, y, z]
                     sunLights[x, y, z] = if (blocks[x, y, z] != null) 0 else chunk.sunLights[x, worldY + 1, z]
-                    if (sunLights[x, y, z] != before) updated = true
                 }
             }
         }
+    }
 
+    fun calculateLighting() {
         // 2. BFS propagation
         val queue: ArrayDeque<Triple<Int, Int, Int>> = ArrayDeque() // store coordinates only
         val propagation = arrayOf(
@@ -103,8 +101,6 @@ class ChunkSection(val blockData: Array<Block?>, val chunk: Chunk, val index: In
                 queue.addLast(Triple(nx, ny, nz))
             }
         }
-
-        if (updated) chunk.getChunkSection(index - 1)?.updateMesh = true
     }
 
 
@@ -215,7 +211,6 @@ class ChunkSection(val blockData: Array<Block?>, val chunk: Chunk, val index: In
 
     fun renderMesh(): Boolean {
         if (!updateMesh) return false
-        calculateLighting()
         verticesForUpload = mutableListOf<Float>()
         setVertices(verticesForUpload!!)
         updateMesh = false
@@ -399,6 +394,10 @@ class Chunk(
         }, this, sectionIndex)
     }
 
+    fun init() {
+        sections.forEach { it.calculateVerticalSunlight() }
+    }
+
     fun getChunkSectionByIndex(index: Int): ChunkSection? {
         if (index !in 0..<numberOfSections) return null
         return sections[index]