Adds support for vanilla negative explosions (#12705)

Fixes #10460

paper-server/patches/features/0016-Moonrise-optimisation-patches.patch

@@ -30766,7 +30766,7 @@ index c59f2c0634e3ebb11b8f6bc09020f951cb602f9b..0842fd6488c8b27d98c4344e1244996b
      ChunkAccess getChunk(int x, int z, ChunkStatus chunkStatus, boolean requireChunk);
  
 diff --git a/net/minecraft/world/level/ServerExplosion.java b/net/minecraft/world/level/ServerExplosion.java
-index 8afaded394fcbf5d7ad4c51ea49642ce93cd5198..e5ccfb8cbfafed7bb0a1d888b5bc98a923e46e59 100644
+index 677780bf473f56a4083b984e1eb75b74f7716540..07e4025ca6c9c31905db2e6921138a0ded479dde 100644
 --- a/net/minecraft/world/level/ServerExplosion.java
 +++ b/net/minecraft/world/level/ServerExplosion.java
 @@ -60,6 +60,249 @@ public class ServerExplosion implements Explosion {
@@ -31019,7 +31019,7 @@ index 8afaded394fcbf5d7ad4c51ea49642ce93cd5198..e5ccfb8cbfafed7bb0a1d888b5bc98a9
  
      public ServerExplosion(
          ServerLevel level,
-@@ -131,63 +374,102 @@ public class ServerExplosion implements Explosion {
+@@ -134,63 +377,102 @@ public class ServerExplosion implements Explosion {
      }
  
      private List<BlockPos> calculateExplodedPositions() {
@@ -31169,10 +31169,10 @@ index 8afaded394fcbf5d7ad4c51ea49642ce93cd5198..e5ccfb8cbfafed7bb0a1d888b5bc98a9
      }
  
      private void hurtEntities() {
-@@ -360,6 +642,14 @@ public class ServerExplosion implements Explosion {
+@@ -358,6 +640,14 @@ public class ServerExplosion implements Explosion {
-             return;
+     }
-         }
+ 
-         // CraftBukkit end
+     public void explode() {
 +        // Paper start - collision optimisations
 +        this.blockCache = new it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap<>();
 +        this.chunkPosCache = new long[CHUNK_CACHE_WIDTH * CHUNK_CACHE_WIDTH];
@@ -31184,7 +31184,7 @@ index 8afaded394fcbf5d7ad4c51ea49642ce93cd5198..e5ccfb8cbfafed7bb0a1d888b5bc98a9
          this.level.gameEvent(this.source, GameEvent.EXPLODE, this.center);
          List<BlockPos> list = this.calculateExplodedPositions();
          this.hurtEntities();
-@@ -373,6 +663,13 @@ public class ServerExplosion implements Explosion {
+@@ -371,6 +661,13 @@ public class ServerExplosion implements Explosion {
          if (this.fire) {
              this.createFire(list);
          }
@@ -31198,7 +31198,7 @@ index 8afaded394fcbf5d7ad4c51ea49642ce93cd5198..e5ccfb8cbfafed7bb0a1d888b5bc98a9
      }
  
      private static void addOrAppendStack(List<ServerExplosion.StackCollector> stackCollectors, ItemStack stack, BlockPos pos) {
-@@ -461,12 +758,12 @@ public class ServerExplosion implements Explosion {
+@@ -459,12 +756,12 @@ public class ServerExplosion implements Explosion {
      // Paper start - Optimize explosions
      private float getBlockDensity(Vec3 vec3d, Entity entity) {
          if (!this.level.paperConfig().environment.optimizeExplosions) {

paper-server/patches/sources/net/minecraft/world/level/ServerExplosion.java.patch

@@ -27,18 +27,14 @@
  
      public ServerExplosion(
          ServerLevel level,
-@@ -60,12 +_,13 @@
+@@ -66,6 +_,10 @@
-     ) {
-         this.level = level;
-         this.source = source;
--        this.radius = radius;
-+        this.radius = (float) Math.max(radius, 0.0); // CraftBukkit - clamp bad values
-         this.center = center;
-         this.fire = fire;
          this.blockInteraction = blockInteraction;
          this.damageSource = damageSource == null ? level.damageSources().explosion(this) : damageSource;
          this.damageCalculator = damageCalculator == null ? this.makeDamageCalculator(source) : damageCalculator;
-+        this.yield = this.blockInteraction == Explosion.BlockInteraction.DESTROY_WITH_DECAY ? 1.0F / this.radius : 1.0F; // CraftBukkit
++        // Paper start - add yield
++        this.yield = this.blockInteraction == Explosion.BlockInteraction.DESTROY_WITH_DECAY ? 1.0F / this.radius : 1.0F;
++        this.yield = Double.isFinite(this.yield) ? this.yield : 0; // Paper - Don't allow infinite default yields
++        // Paper end - add yield
      }
  
      private ExplosionDamageCalculator makeDamageCalculator(@Nullable Entity entity) {
@@ -201,7 +197,7 @@
              this.level
                  .getBlockState(blockPos)
                  .onExplosionHit(this.level, blockPos, this, (itemStack, blockPos1) -> addOrAppendStack(list, itemStack, blockPos1));
-@@ -236,12 +_,21 @@
+@@ -236,7 +_,11 @@
      private void createFire(List<BlockPos> blocks) {
          for (BlockPos blockPos : blocks) {
              if (this.level.random.nextInt(3) == 0 && this.level.getBlockState(blockPos).isAir() && this.level.getBlockState(blockPos.below()).isSolidRender()) {
@@ -214,16 +210,6 @@
              }
          }
      }
- 
-     public void explode() {
-+        // CraftBukkit start
-+        if (this.radius < 0.1F) {
-+            return;
-+        }
-+        // CraftBukkit end
-         this.level.gameEvent(this.source, GameEvent.EXPLODE, this.center);
-         List<BlockPos> list = this.calculateExplodedPositions();
-         this.hurtEntities();
 @@ -338,4 +_,86 @@
              }
          }

paper-server/patches/sources/net/minecraft/world/level/block/state/BlockBehaviour.java.patch

@@ -30,7 +30,7 @@
 -                    builder.withParameter(LootContextParams.EXPLOSION_RADIUS, explosion.radius());
 +                // CraftBukkit start - add yield
 +                if (explosion instanceof net.minecraft.world.level.ServerExplosion serverExplosion && serverExplosion.yield < 1.0F) {
-+                    builder.withParameter(LootContextParams.EXPLOSION_RADIUS, 1.0F / serverExplosion.yield);
++                    builder.withParameter(LootContextParams.EXPLOSION_RADIUS, serverExplosion.yield == 0 ? 0 : 1.0F / serverExplosion.yield);
 +                    // CraftBukkit end
                  }