From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.World/AddEntityPacket.cpp | 111 ++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 Minecraft.World/AddEntityPacket.cpp

(limited to 'Minecraft.World/AddEntityPacket.cpp')

diff --git a/Minecraft.World/AddEntityPacket.cpp b/Minecraft.World/AddEntityPacket.cpp
new file mode 100644
index 00000000..6231537d
--- /dev/null
+++ b/Minecraft.World/AddEntityPacket.cpp
@@ -0,0 +1,111 @@
+#include "stdafx.h"
+#include <exception>
+#include <iostream>
+#include "InputOutputStream.h"
+#include "net.minecraft.world.entity.h"
+#include "PacketListener.h"
+#include "AddEntityPacket.h"
+
+
+
+void AddEntityPacket::_init(shared_ptr<Entity> e, int type, int data, int xp, int yp, int zp, int yRotp, int xRotp)
+{
+	id = e->entityId;
+	// 4J Stu - We should add entities at their "last sent" position so that the relative update packets
+	// put them in the correct place
+	x = xp;//(int) floor(e->x * 32);
+	y = yp;//(int) floor(e->y * 32);
+	z = zp;//(int) floor(e->z * 32);
+	yRot = yRotp;
+	xRot = xRotp;
+	this->type = type;
+	this->data = data;
+	if (data > -1)	// 4J - changed "no data" value to be -1, we can have a valid entity id of 0
+	{
+		double xd = e->xd;
+		double yd = e->yd;
+		double zd = e->zd;
+		double m = 3.9;
+		if (xd < -m) xd = -m;
+		if (yd < -m) yd = -m;
+		if (zd < -m) zd = -m;
+		if (xd > m) xd = m;
+		if (yd > m) yd = m;
+		if (zd > m) zd = m;
+		xa = (int) (xd * 8000.0);
+		ya = (int) (yd * 8000.0);
+		za = (int) (zd * 8000.0);
+	}
+}
+
+AddEntityPacket::AddEntityPacket() 
+{
+}
+
+AddEntityPacket::AddEntityPacket(shared_ptr<Entity> e, int type, int yRotp, int xRotp, int xp, int yp, int zp )
+{
+	_init(e, type, -1, xp, yp, zp, yRotp, xRotp); // 4J - changed "no data" value to be -1, we can have a valid entity id of 0
+}
+
+AddEntityPacket::AddEntityPacket(shared_ptr<Entity> e, int type, int data, int yRotp, int xRotp, int xp, int yp, int zp ) 
+{
+	_init(e, type, data, xp, yp, zp, yRotp, xRotp);
+}
+
+void AddEntityPacket::read(DataInputStream *dis) // throws IOException  TODO 4J JEV add throws statement
+{
+	id = dis->readShort();
+	type = dis->readByte();
+#ifdef _LARGE_WORLDS
+	x = dis->readInt();
+	y = dis->readInt();
+	z = dis->readInt();
+#else
+	x = dis->readShort();
+	y = dis->readShort();
+	z = dis->readShort();
+#endif
+	yRot = dis->readByte();
+	xRot = dis->readByte();
+	data = dis->readInt();
+	if (data > -1)	// 4J - changed "no data" value to be -1, we can have a valid entity id of 0
+	{
+		xa = dis->readShort();
+		ya = dis->readShort();
+		za = dis->readShort();
+	}
+}
+
+void AddEntityPacket::write(DataOutputStream *dos) // throws IOException TODO 4J JEV add throws statement
+{
+	dos->writeShort(id);
+	dos->writeByte(type);
+#ifdef _LARGE_WORLDS
+	dos->writeInt(x);
+	dos->writeInt(y);
+	dos->writeInt(z);
+#else
+	dos->writeShort(x);
+	dos->writeShort(y);
+	dos->writeShort(z);
+#endif
+	dos->writeByte(yRot);
+	dos->writeByte(xRot);
+	dos->writeInt(data);
+	if (data > -1) // 4J - changed "no data" value to be -1, we can have a valid entity id of 0
+	{
+		dos->writeShort(xa);
+		dos->writeShort(ya);
+		dos->writeShort(za);
+	}
+}
+
+void AddEntityPacket::handle(PacketListener *listener) 
+{
+	listener->handleAddEntity(shared_from_this());
+}
+
+int AddEntityPacket::getEstimatedSize() 
+{
+	return 11 + data > -1 ? 6 : 0;
+}
-- 
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