PaperMC/Spigot-Server-Patches/0381-Limit-lightning-strike-effect-distance.patch

From 8eaa1a8c45655ea01da92e0863dd5d91cb67442b Mon Sep 17 00:00:00 2001
From: Trigary <trigary0@gmail.com>
Date: Fri, 14 Sep 2018 17:42:08 +0200
Subject: [PATCH] Limit lightning strike effect distance


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index e042040557..30985cdfc7 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -237,6 +237,28 @@ public class PaperWorldConfig {
             skeleHorseSpawnChance = 0.01D; // Vanilla value
         }
     }
+    
+    public double sqrMaxThunderDistance;
+    public double sqrMaxLightningImpactSoundDistance;
+    public double maxLightningFlashDistance;
+    private void lightningStrikeDistanceLimit() {
+        sqrMaxThunderDistance = getInt("lightning-strike-distance-limit.sound", -1);
+        if (sqrMaxThunderDistance > 0) {
+            sqrMaxThunderDistance *= sqrMaxThunderDistance;
+        }
+
+        sqrMaxLightningImpactSoundDistance = getInt("lightning-strike-distance-limit.impact-sound", -1);
+        if (sqrMaxLightningImpactSoundDistance < 0) {
+            sqrMaxLightningImpactSoundDistance = 32 * 32; //Vanilla value
+        } else {
+            sqrMaxLightningImpactSoundDistance *= sqrMaxLightningImpactSoundDistance;
+        }
+
+        maxLightningFlashDistance = getInt("lightning-strike-distance-limit.flash", -1);
+        if (maxLightningFlashDistance < 0) {
+            maxLightningFlashDistance = 512; // Vanilla value
+        }
+    }
 
     public boolean firePhysicsEventForRedstone = false;
     private void firePhysicsEventForRedstone() {
diff --git a/src/main/java/net/minecraft/server/EntityLightning.java b/src/main/java/net/minecraft/server/EntityLightning.java
index 7781babf51..50f6200095 100644
--- a/src/main/java/net/minecraft/server/EntityLightning.java
+++ b/src/main/java/net/minecraft/server/EntityLightning.java
@@ -60,6 +60,17 @@ public class EntityLightning extends EntityWeather {
                 double deltaX = this.locX - player.locX;
                 double deltaZ = this.locZ - player.locZ;
                 double distanceSquared = deltaX * deltaX + deltaZ * deltaZ;
+                // Paper start - Limit lightning strike effect distance
+                if (distanceSquared <= this.world.paperConfig.sqrMaxLightningImpactSoundDistance) {
+                    player.playerConnection.sendPacket(new PacketPlayOutNamedSoundEffect(SoundEffects.ENTITY_LIGHTNING_BOLT_IMPACT,
+                            SoundCategory.WEATHER, this.locX, this.locY, this.locZ, 2.0f, 0.5F + this.random.nextFloat() * 0.2F));
+                }
+
+                if (world.paperConfig.sqrMaxThunderDistance != -1 && distanceSquared >= world.paperConfig.sqrMaxThunderDistance) {
+                    continue;
+                }
+
+                // Paper end
                 if (distanceSquared > viewDistance * viewDistance) {
                     double deltaLength = Math.sqrt(distanceSquared);
                     double relativeX = player.locX + (deltaX / deltaLength) * viewDistance;
@@ -70,7 +81,7 @@ public class EntityLightning extends EntityWeather {
                 }
             }
             // CraftBukkit end
-            this.world.a((EntityHuman) null, this.locX, this.locY, this.locZ, SoundEffects.ENTITY_LIGHTNING_BOLT_IMPACT, SoundCategory.WEATHER, 2.0F, 0.5F + this.random.nextFloat() * 0.2F);
+            //this.world.a((EntityHuman) null, this.locX, this.locY, this.locZ, SoundEffects.ENTITY_LIGHTNING_BOLT_IMPACT, SoundCategory.WEATHER, 2.0f, 0.5F + this.random.nextFloat() * 0.2F);  // Paper - Limit lightning strike effect distance (the packet is now sent from inside the loop)
         }
 
         --this.lifeTicks;
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 9b5509dce3..409b507446 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -1064,7 +1064,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
         }
         // CraftBukkit end
         if (super.strikeLightning(entity)) {
-            this.server.getPlayerList().sendPacketNearby((EntityHuman) null, entity.locX, entity.locY, entity.locZ, 512.0D, this, new PacketPlayOutSpawnEntityWeather(entity)); // CraftBukkit - Use dimension, // Paper - use world instead of dimension
+            this.server.getPlayerList().sendPacketNearby((EntityHuman) null, entity.locX, entity.locY, entity.locZ, this.paperConfig.maxLightningFlashDistance, this, new PacketPlayOutSpawnEntityWeather(entity)); // CraftBukkit - Use dimension, // Paper - use world instead of dimension, limit lightning strike effect distance
             return true;
         } else {
             return false;
-- 
2.20.1