From 25cd7cc3e1d8eb06c5db48d6ef735d8db0b1c1c9 Mon Sep 17 00:00:00 2001
From: LexManos <LexManos@gmail.com>
Date: Tue, 22 Mar 2016 13:35:45 -0700
Subject: [PATCH] Update FML Entity Spawn packet for 1.9's location change.
 Closes #2567

---
 .../network/internal/EntitySpawnHandler.java  | 12 ++++----
 .../common/network/internal/FMLMessage.java   | 29 +++++++++----------
 2 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/src/main/java/net/minecraftforge/fml/common/network/internal/EntitySpawnHandler.java b/src/main/java/net/minecraftforge/fml/common/network/internal/EntitySpawnHandler.java
index 2cf6b6e05b..dff8d30c06 100644
--- a/src/main/java/net/minecraftforge/fml/common/network/internal/EntitySpawnHandler.java
+++ b/src/main/java/net/minecraftforge/fml/common/network/internal/EntitySpawnHandler.java
@@ -9,6 +9,7 @@ import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.multiplayer.WorldClient;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityLiving;
+import net.minecraft.entity.EntityTracker;
 import net.minecraft.util.IThreadListener;
 import net.minecraft.world.World;
 import net.minecraftforge.fml.client.FMLClientHandler;
@@ -61,7 +62,7 @@ public class EntitySpawnHandler extends SimpleChannelInboundHandler<FMLMessage.E
         if (er == null)
         {
             throw new RuntimeException( "Could not spawn mod entity ModID: " + spawnMsg.modId + " EntityID: " + spawnMsg.modEntityTypeId +
-                    " at ( " + spawnMsg.scaledX + "," + spawnMsg.scaledY + ", " + spawnMsg.scaledZ + ") Please contact mod author or server admin.");
+                    " at ( " + spawnMsg.rawX + "," + spawnMsg.rawY + ", " + spawnMsg.rawZ + ") Please contact mod author or server admin.");
         }
         WorldClient wc = FMLClientHandler.instance().getWorldClient();
         Class<? extends Entity> cls = er.getEntityClass();
@@ -77,7 +78,8 @@ public class EntitySpawnHandler extends SimpleChannelInboundHandler<FMLMessage.E
 
                 int offset = spawnMsg.entityId - entity.getEntityId();
                 entity.setEntityId(spawnMsg.entityId);
-                entity.setLocationAndAngles(spawnMsg.scaledX, spawnMsg.scaledY, spawnMsg.scaledZ, spawnMsg.scaledYaw, spawnMsg.scaledPitch);
+                entity.setUniqueId(spawnMsg.entityUUID);
+                entity.setLocationAndAngles(spawnMsg.rawX, spawnMsg.rawY, spawnMsg.rawZ, spawnMsg.scaledYaw, spawnMsg.scaledPitch);
                 if (entity instanceof EntityLiving)
                 {
                     ((EntityLiving) entity).rotationYawHead = spawnMsg.scaledHeadYaw;
@@ -93,9 +95,7 @@ public class EntitySpawnHandler extends SimpleChannelInboundHandler<FMLMessage.E
                 }
             }
 
-            entity.serverPosX = spawnMsg.rawX;
-            entity.serverPosY = spawnMsg.rawY;
-            entity.serverPosZ = spawnMsg.rawZ;
+            EntityTracker.func_187254_a(entity, spawnMsg.rawX, spawnMsg.rawY, spawnMsg.rawZ);
 
             EntityPlayerSP clientPlayer = FMLClientHandler.instance().getClientPlayerEntity();
             if (entity instanceof IThrowableEntity)
@@ -121,7 +121,7 @@ public class EntitySpawnHandler extends SimpleChannelInboundHandler<FMLMessage.E
             wc.addEntityToWorld(spawnMsg.entityId, entity);
         } catch (Exception e)
         {
-            FMLLog.log(Level.ERROR, e, "A severe problem occurred during the spawning of an entity at ( " + spawnMsg.scaledX + "," + spawnMsg.scaledY + ", " + spawnMsg.scaledZ +")");
+            FMLLog.log(Level.ERROR, e, "A severe problem occurred during the spawning of an entity at ( " + spawnMsg.rawX + "," + spawnMsg.rawY + ", " + spawnMsg.rawZ +")");
             throw Throwables.propagate(e);
         }
     }
diff --git a/src/main/java/net/minecraftforge/fml/common/network/internal/FMLMessage.java b/src/main/java/net/minecraftforge/fml/common/network/internal/FMLMessage.java
index 5100f2d504..8dd01e97e1 100644
--- a/src/main/java/net/minecraftforge/fml/common/network/internal/FMLMessage.java
+++ b/src/main/java/net/minecraftforge/fml/common/network/internal/FMLMessage.java
@@ -5,6 +5,7 @@ import io.netty.buffer.Unpooled;
 
 import java.io.IOException;
 import java.util.List;
+import java.util.UUID;
 
 import net.minecraft.network.datasync.EntityDataManager;
 import org.apache.logging.log4j.Level;
@@ -112,12 +113,10 @@ public abstract class FMLMessage {
     public static class EntitySpawnMessage extends EntityMessage {
         String modId;
         int modEntityTypeId;
-        int rawX;
-        int rawY;
-        int rawZ;
-        double scaledX;
-        double scaledY;
-        double scaledZ;
+        UUID entityUUID;
+        double rawX;
+        double rawY;
+        double rawZ;
         float scaledYaw;
         float scaledPitch;
         float scaledHeadYaw;
@@ -141,10 +140,12 @@ public abstract class FMLMessage {
             super.toBytes(buf);
             ByteBufUtils.writeUTF8String(buf, modId);
             buf.writeInt(modEntityTypeId);
+            buf.writeLong(entityUUID.getMostSignificantBits());
+            buf.writeLong(entityUUID.getLeastSignificantBits());
             // posX, posY, posZ
-            buf.writeInt(MathHelper.floor_double(entity.posX * 32D));
-            buf.writeInt(MathHelper.floor_double(entity.posY * 32D));
-            buf.writeInt(MathHelper.floor_double(entity.posZ * 32D));
+            buf.writeDouble(entity.posX);
+            buf.writeDouble(entity.posY);
+            buf.writeDouble(entity.posZ);
             // yaw, pitch
             buf.writeByte((byte)(entity.rotationYaw * 256.0F / 360.0F));
             buf.writeByte((byte) (entity.rotationPitch * 256.0F / 360.0F));
@@ -204,12 +205,10 @@ public abstract class FMLMessage {
             super.fromBytes(dat);
             modId = ByteBufUtils.readUTF8String(dat);
             modEntityTypeId = dat.readInt();
-            rawX = dat.readInt();
-            rawY = dat.readInt();
-            rawZ = dat.readInt();
-            scaledX = rawX / 32D;
-            scaledY = rawY / 32D;
-            scaledZ = rawZ / 32D;
+            entityUUID = new UUID(dat.readLong(), dat.readLong());
+            rawX = dat.readDouble();
+            rawY = dat.readDouble();
+            rawZ = dat.readDouble();
             scaledYaw = dat.readByte() * 360F / 256F;
             scaledPitch = dat.readByte() * 360F / 256F;
             scaledHeadYaw = dat.readByte() * 360F / 256F;