MoveActorDeltaPacket.php

<?php
 
/*
 * This file is part of BedrockProtocol.
 * Copyright (C) 2014-2022 PocketMine Team <https://github.com/pmmp/BedrockProtocol>
 *
 * BedrockProtocol is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 */
 
declare(strict_types=1);
 
namespace pocketmine\network\mcpe\protocol;
 
use pmmp\encoding\ByteBufferReader;
use pmmp\encoding\ByteBufferWriter;
use pmmp\encoding\DataDecodeException;
use pmmp\encoding\LE;
use pocketmine\network\mcpe\protocol\serializer\CommonTypes;
 
class MoveActorDeltaPacket extends DataPacket implements ClientboundPacket{
    public const NETWORK_ID = ProtocolInfo::MOVE_ACTOR_DELTA_PACKET;
 
    public const FLAG_HAS_X = 0x01;
    public const FLAG_HAS_Y = 0x02;
    public const FLAG_HAS_Z = 0x04;
    public const FLAG_HAS_PITCH = 0x08;
    public const FLAG_HAS_YAW = 0x10;
    public const FLAG_HAS_HEAD_YAW = 0x20;
    public const FLAG_GROUND = 0x40;
    public const FLAG_TELEPORT = 0x80;
    public const FLAG_FORCE_MOVE_LOCAL_ENTITY = 0x100;
 
    public int $actorRuntimeId;
    public int $flags;
    public float $xPos = 0;
    public float $yPos = 0;
    public float $zPos = 0;
    public float $pitch = 0.0;
    public float $yaw = 0.0;
    public float $headYaw = 0.0;
 
    private function maybeReadCoord(int $flag, ByteBufferReader $in) : float{
        if(($this->flags & $flag) !== 0){
            return LE::readFloat($in);
        }
        return 0;
    }
 
    private function maybeReadRotation(int $flag, ByteBufferReader $in) : float{
        if(($this->flags & $flag) !== 0){
            return CommonTypes::getRotationByte($in);
        }
        return 0.0;
    }
 
    protected function decodePayload(ByteBufferReader $in) : void{
        $this->actorRuntimeId = CommonTypes::getActorRuntimeId($in);
        $this->flags = LE::readUnsignedShort($in);
        $this->xPos = $this->maybeReadCoord(self::FLAG_HAS_X, $in);
        $this->yPos = $this->maybeReadCoord(self::FLAG_HAS_Y, $in);
        $this->zPos = $this->maybeReadCoord(self::FLAG_HAS_Z, $in);
        $this->pitch = $this->maybeReadRotation(self::FLAG_HAS_PITCH, $in);
        $this->yaw = $this->maybeReadRotation(self::FLAG_HAS_YAW, $in);
        $this->headYaw = $this->maybeReadRotation(self::FLAG_HAS_HEAD_YAW, $in);
    }
 
    private function maybeWriteCoord(int $flag, float $val, ByteBufferWriter $out) : void{
        if(($this->flags & $flag) !== 0){
            LE::writeFloat($out, $val);
        }
    }
 
    private function maybeWriteRotation(int $flag, float $val, ByteBufferWriter $out) : void{
        if(($this->flags & $flag) !== 0){
            CommonTypes::putRotationByte($out, $val);
        }
    }
 
    protected function encodePayload(ByteBufferWriter $out) : void{
        CommonTypes::putActorRuntimeId($out, $this->actorRuntimeId);
        LE::writeUnsignedShort($out, $this->flags);
        $this->maybeWriteCoord(self::FLAG_HAS_X, $this->xPos, $out);
        $this->maybeWriteCoord(self::FLAG_HAS_Y, $this->yPos, $out);
        $this->maybeWriteCoord(self::FLAG_HAS_Z, $this->zPos, $out);
        $this->maybeWriteRotation(self::FLAG_HAS_PITCH, $this->pitch, $out);
        $this->maybeWriteRotation(self::FLAG_HAS_YAW, $this->yaw, $out);
        $this->maybeWriteRotation(self::FLAG_HAS_HEAD_YAW, $this->headYaw, $out);
    }
 
    public function handle(PacketHandlerInterface $handler) : bool{
        return $handler->handleMoveActorDelta($this);
    }
}