// ==UserScript==
// @name         Krunker.IO AimLock
// @namespace    http://tampermonkey.net/
// @version      0.0.4
// @description  Locks aim to the nearest player in krunker.io
// @author       Zertalious (Zert)
// @match        *://krunker.io/*
// @icon         https://www.google.com/s2/favicons?domain=krunker.io
// @grant        none
// @run-at       document-end
// @require      https://unpkg.com/three@latest/build/three.min.js
// @downloadURL none
// ==/UserScript==

const tempVector = new THREE.Vector3();

const tempObject = new THREE.Object3D();

tempObject.rotation.order = 'YXZ';

const geometry = new THREE.SphereGeometry( 10 );

const material = new THREE.MeshLambertMaterial( {
	color: 'red',
	wireframe: true
} );

const meshes = [];

let isActive = true;

let scene;

WeakMap.prototype.set = new Proxy( WeakMap.prototype.set, {
	apply( target, thisArgs, args ) {

		if ( args[ 0 ].type === 'Scene' && args[ 0 ].name === 'Main' ) {

			scene = args[ 0 ];

		}

		return Reflect.apply( ...arguments );

	}
} );

function animate() {

	window.requestAnimationFrame( animate );

	if ( isActive === false || scene === undefined ) {

		return;

	}

	const players = [];

	let myPlayer;

	for ( let i = 0; i < scene.children.length; i ++ ) {

		const child = scene.children[ i ];

		if ( child.type === 'Object3D' ) {

			try {

				if ( child.children[ 0 ].children[ 0 ].type === 'PerspectiveCamera' ) {

					myPlayer = child;

				} else {

					players.push( child );

				}

			} catch ( err ) {}

		}

	}

	if ( players.length < 2 ) {

		return;

	}

	let targetPlayer;
	let minDistance = Infinity;

	for ( let i = 0; i < players.length; i ++ ) {

		const player = players[ i ];

		if ( player.position.x === myPlayer.position.x && player.position.z === myPlayer.position.z ) {

			continue;

		}

		if ( player.firstTime !== true ) {

			const mesh = new THREE.Mesh( geometry, material );

			meshes.push( mesh );

			player.add( mesh );

			player.firstTime = true;

		}

		const distance = player.position.distanceTo( myPlayer.position );

		if ( distance < minDistance ) {

			targetPlayer = player;

			minDistance = distance;

		}

	}

	if ( targetPlayer === undefined ) {

		return;

	}

	tempVector.setScalar( 0 );

	targetPlayer.children[ 0 ].children[ 0 ].localToWorld( tempVector );

	tempObject.position.copy( myPlayer.position );

	tempObject.lookAt( tempVector );

	myPlayer.children[ 0 ].rotation.x = - tempObject.rotation.x;
	myPlayer.rotation.y = tempObject.rotation.y + Math.PI;

}

animate();

window.addEventListener( 'keydown', function ( event ) {

	if ( String.fromCharCode( event.keyCode ) === 'G' ) {

		isActive = ! isActive;

		for ( let i = 0; i < meshes.length; i ++ ) {

			meshes[ i ].visible = isActive;

		}

	}

} );

const el = document.createElement( 'div' );

el.innerHTML = `<style>

.dialog {
	position: absolute;
	left: 50%;
	top: 50%;
	padding: 20px;
	background: rgba(0, 0, 0, 0.8);
	border: 6px solid rgba(0, 0, 0, 0.2);
	color: #fff;
	transform: translate(-50%, -50%);
	text-align: center;
	z-index: 999999;
}

.dialog * {
	color: #fff;
}

.close {
	position: absolute;
	right: 5px;
	top: 5px;
	width: 20px;
	height: 20px;
	opacity: 0.5;
	cursor: pointer;
}

.close:before, .close:after {
	content: ' ';
	position: absolute;
	left: 50%;
	top: 50%;
	width: 100%;
	height: 20%;
	transform: translate(-50%, -50%) rotate(-45deg);
	background: #fff;
}

.close:after {
	transform: translate(-50%, -50%) rotate(45deg);
}

.close:hover {
	opacity: 1;
}

.btn {
	cursor: pointer;
	padding: 0.5em;
	background: red;
	border: 3px solid rgba(0, 0, 0, 0.2);
	margin-bottom: 5px;
}

.btn:active {
	transform: scale(0.8);
}

</style>
<div class="dialog">
	<div class="close" onclick="this.parentNode.style.display='none';"></div>
	<big>== Aimlocker ==</big>
	<br>
	<br>
	[G] to toggle aimlock
	<br>
	<br>
	By Zertalious
	<br>
	<br>
	<div class="btn" onclick="window.open('https://discord.gg/K24Zxy88VM')">Discord</div>
	<div class="btn" onclick="window.open('https://greasyfork.org/en/users/662330-zertalious', '_blank')">More scripts</div>
</div>`;

while ( el.children.length > 0 ) {

	document.body.appendChild( el.children[ 0 ] );

}