Fixed vertical knock back not matching vanilla

[JavierLeon9966]

Introduction

I tested the knockback in a vanilla server using gophertunnel by logging the output of SetActorMotionPacket and it turns out the player has a vertical knockback limit of 0.3608.

Relevant issues

None

Changes

API changes

None

Behavioural changes

None

Backwards compatibility

None

Follow-up

None

Tests

<?php

declare(strict_types=1);

namespace JavierLeon9966\KBTest;

use pocketmine\event\EventPriority;
use pocketmine\event\player\PlayerItemUseEvent;
use pocketmine\plugin\PluginBase;

class Main extends PluginBase{

	protected function onEnable(): void{
		$this->getServer()->getPluginManager()->registerEvent(PlayerItemUseEvent::class, function(PlayerItemUseEvent $event): void{
			$event->getPlayer()->knockBack(lcg_value() * 2 - 1, lcg_value() * 2 - 1);
		}, EventPriority::MONITOR, $this);
	}
}

Screen_Recording_20230810_154530_Minecraft.mp4

[IvanCraft623]

Are you sure this isn't a randomized value?

[JavierLeon9966]

Are you sure this isn't a randomized value?

Yes. I tested multiple times and that value was always logged.

[ItsZodiaX]

dragonfly also use this value.

[dktapps]

I feel like there's some physics that we're missing here. Java uses 0.4, and Bedrock mimics Java in this regard.