087b7e7abf
This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.
This reverts commit a9be52c41a.
114 lines
2.3 KiB
C++
114 lines
2.3 KiB
C++
#include "stdafx.h"
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#include <iostream>
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#include "InputOutputStream.h"
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#include "net.minecraft.world.entity.h"
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#include "PacketListener.h"
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#include "SetEntityMotionPacket.h"
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void SetEntityMotionPacket::_init(int id, double xd, double yd, double zd)
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{
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this->id = id;
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double m = 3.9;
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if (xd < -m) xd = -m;
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if (yd < -m) yd = -m;
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if (zd < -m) zd = -m;
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if (xd > m) xd = m;
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if (yd > m) yd = m;
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if (zd > m) zd = m;
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xa = (int) (xd * 8000.0);
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ya = (int) (yd * 8000.0);
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za = (int) (zd * 8000.0);
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// 4J - if we could transmit this as bytes (in 1/16 accuracy) then flag to do so
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if( ( xa >= (-128 * 16 ) ) && ( ya >= (-128 * 16 ) ) && ( za >= (-128 * 16 ) ) &&
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( xa < (128 * 16 ) ) && ( ya < (128 * 16 ) ) && ( za < (128 * 16 ) ) )
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{
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useBytes = true;
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}
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else
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{
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useBytes = false;
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}
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}
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SetEntityMotionPacket::SetEntityMotionPacket()
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{
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_init(0, 0.0f, 0.0f, 0.0f);
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}
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SetEntityMotionPacket::SetEntityMotionPacket(shared_ptr<Entity> e)
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{
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_init(e->entityId, e->xd, e->yd, e->zd);
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}
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SetEntityMotionPacket::SetEntityMotionPacket(int id, double xd, double yd, double zd)
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{
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_init(id, xd, yd, zd);
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}
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void SetEntityMotionPacket::read(DataInputStream *dis) //throws IOException
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{
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short idAndFlag = dis->readShort();
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id = idAndFlag & 0x07ff;
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if( idAndFlag & 0x0800 )
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{
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xa = (int)dis->readByte();
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ya = (int)dis->readByte();
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za = (int)dis->readByte();
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xa = ( xa << 24 ) >> 24;
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ya = ( ya << 24 ) >> 24;
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za = ( za << 24 ) >> 24;
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xa *= 16;
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ya *= 16;
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za *= 16;
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useBytes = true;
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}
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else
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{
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xa = dis->readShort();
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ya = dis->readShort();
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za = dis->readShort();
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useBytes = false;
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}
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}
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void SetEntityMotionPacket::write(DataOutputStream *dos) //throws IOException
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{
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if( useBytes )
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{
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dos->writeShort(id | 0x800);
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dos->writeByte(xa/16);
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dos->writeByte(ya/16);
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dos->writeByte(za/16);
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}
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else
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{
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dos->writeShort(id);
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dos->writeShort(xa);
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dos->writeShort(ya);
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dos->writeShort(za);
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}
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}
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void SetEntityMotionPacket::handle(PacketListener *listener)
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{
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listener->handleSetEntityMotion(shared_from_this());
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}
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int SetEntityMotionPacket::getEstimatedSize()
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{
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return useBytes ? 5 : 8;
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}
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bool SetEntityMotionPacket::canBeInvalidated()
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{
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return true;
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}
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bool SetEntityMotionPacket::isInvalidatedBy(shared_ptr<Packet> packet)
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{
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shared_ptr<SetEntityMotionPacket> target = dynamic_pointer_cast<SetEntityMotionPacket>(packet);
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return target->id == id;
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}
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