[1.21.3] Fix BlockParticleOption#pos not getting sent to the client

patches/net/minecraft/core/particles/BlockParticleOption.java.patch

@@ -1,18 +1,57 @@
 --- a/net/minecraft/core/particles/BlockParticleOption.java
 +++ b/net/minecraft/core/particles/BlockParticleOption.java
-@@ -37,4 +_,15 @@
-     public BlockState getState() {
-         return this.state;
+@@ -15,18 +_,39 @@
+     );
+     private final ParticleType<BlockParticleOption> type;
+     private final BlockState state;
++    /** Neo: Position of the block this particle was spawned for, if available, to provide model data for the particle texture selection */
++    @org.jetbrains.annotations.Nullable
++    private final net.minecraft.core.BlockPos pos;
+
+     public static MapCodec<BlockParticleOption> codec(ParticleType<BlockParticleOption> p_123635_) {
+         return BLOCK_STATE_CODEC.xmap(p_123638_ -> new BlockParticleOption(p_123635_, p_123638_), p_123633_ -> p_123633_.state).fieldOf("block_state");
+     }
+
+     public static StreamCodec<? super RegistryFriendlyByteBuf, BlockParticleOption> streamCodec(ParticleType<BlockParticleOption> p_320740_) {
+-        return ByteBufCodecs.idMapper(Block.BLOCK_STATE_REGISTRY).map(p_319424_ -> new BlockParticleOption(p_320740_, p_319424_), p_319425_ -> p_319425_.state);
++        return StreamCodec.composite(
++                ByteBufCodecs.idMapper(Block.BLOCK_STATE_REGISTRY),
++                option -> option.state,
++                net.neoforged.neoforge.network.codec.NeoForgeStreamCodecs.connectionAware(
++                        ByteBufCodecs.optional(net.minecraft.core.BlockPos.STREAM_CODEC),
++                        net.neoforged.neoforge.network.codec.NeoForgeStreamCodecs.uncheckedUnit(java.util.Optional.empty())
++                ),
++                option -> java.util.Optional.ofNullable(option.pos),
++                (state, pos) -> new BlockParticleOption(p_320740_, state, pos.orElse(null))
++        );
      }
+
+     public BlockParticleOption(ParticleType<BlockParticleOption> p_123629_, BlockState p_123630_) {
++        this(p_123629_, p_123630_, null);
++    }
 +
-+    //FORGE: Add a source pos property, so we can provide models with additional model data
-+    private net.minecraft.core.BlockPos pos;
-+    public BlockParticleOption setPos(net.minecraft.core.BlockPos pos) {
++    /**
++     * Neo: construct a {@link BlockParticleOption} for the given type and {@link BlockState} and optionally the position
++     * of the block this particle is being spawned for
++     */
++    public BlockParticleOption(ParticleType<BlockParticleOption> p_123629_, BlockState p_123630_, @org.jetbrains.annotations.Nullable net.minecraft.core.BlockPos pos) {
+         this.type = p_123629_;
+         this.state = p_123630_;
 +        this.pos = pos;
-+        return this;
+     }
+
+     @Override
+@@ -36,5 +_,13 @@
+
+     public BlockState getState() {
+         return this.state;
 +    }
 +
++    /**
++     * Neo: returns the position of the block this particle was spawned for, if available
++     */
++    @org.jetbrains.annotations.Nullable
 +    public net.minecraft.core.BlockPos getPos() {
 +        return pos;
-+    }
+     }
  }

patches/net/minecraft/world/entity/Entity.java.patch

@@ -166,7 +166,7 @@
              }
 
 -            this.level().addParticle(new BlockParticleOption(ParticleTypes.BLOCK, blockstate), d0, this.getY() + 0.1, d1, vec3.x * -4.0, 1.5, vec3.z * -4.0);
-+            this.level().addParticle(new BlockParticleOption(ParticleTypes.BLOCK, blockstate).setPos(blockpos), d0, this.getY() + 0.1, d1, vec3.x * -4.0, 1.5, vec3.z * -4.0);
++            this.level().addParticle(new BlockParticleOption(ParticleTypes.BLOCK, blockstate, blockpos), d0, this.getY() + 0.1, d1, vec3.x * -4.0, 1.5, vec3.z * -4.0);
          }
      }
 

patches/net/minecraft/world/entity/LivingEntity.java.patch

@@ -61,8 +61,8 @@
                  double d4 = Math.min((double)(0.2F + f / 15.0F), 2.5);
                  int i = (int)(150.0 * d4);
 -                serverlevel.sendParticles(new BlockParticleOption(ParticleTypes.BLOCK, p_20992_), d0, d1, d2, i, 0.0, 0.0, 0.0, 0.15F);
-+                if (!p_20992_.addLandingEffects((ServerLevel) this.level(), p_20993_, p_20992_, this, i))
-+                ((ServerLevel)this.level()).sendParticles(new BlockParticleOption(ParticleTypes.BLOCK, p_20992_).setPos(p_20993_), d0, d1, d2, i, 0.0, 0.0, 0.0, 0.15F);
++                if (!p_20992_.addLandingEffects(serverlevel, p_20993_, p_20992_, this, i))
++                serverlevel.sendParticles(new BlockParticleOption(ParticleTypes.BLOCK, p_20992_, p_20993_), d0, d1, d2, i, 0.0, 0.0, 0.0, 0.15F);
              }
          }