PaperMC/Spigot-Server-Patches/0315-Limit-lightning-strike-effect-distance.patch

From ebf53752a5a07cefac575ed2ea3f09bcb7501450 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 e49318a19..fe3e78f36 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -240,6 +240,28 @@ public class PaperWorldConfig {
         }
     }
 
+    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 int fixedInhabitedTime;
     private void fixedInhabitedTime() {
         if (PaperConfig.version < 16) {
diff --git a/src/main/java/net/minecraft/server/EntityLightning.java b/src/main/java/net/minecraft/server/EntityLightning.java
index 7c518983a..bdb534deb 100644
--- a/src/main/java/net/minecraft/server/EntityLightning.java
+++ b/src/main/java/net/minecraft/server/EntityLightning.java
@@ -64,6 +64,17 @@ public class EntityLightning extends Entity {
                 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;
@@ -74,7 +85,7 @@ public class EntityLightning extends Entity {
                 }
             }
             // CraftBukkit end
-            this.world.playSound((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.playSound((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 a0c714129..ecfcecfdc 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -1250,7 +1250,7 @@ public class WorldServer extends World {
         }
         // CraftBukkit end
         this.globalEntityList.add(entitylightning);
-        this.server.getPlayerList().sendPacketNearby((EntityHuman) null, entitylightning.locX(), entitylightning.locY(), entitylightning.locZ(), 512.0D, this, new PacketPlayOutSpawnEntityWeather(entitylightning)); // Paper - use world instead of dimension
+        this.server.getPlayerList().sendPacketNearby((EntityHuman) null, entitylightning.locX(), entitylightning.locY(), entitylightning.locZ(), paperConfig.maxLightningFlashDistance, this, new PacketPlayOutSpawnEntityWeather(entitylightning)); // Paper - use world instead of dimension, limit lightning strike effect distance
     }
 
     @Override
-- 
2.17.1