unibutton/common/npc.js

import { distF, uuidv4 } from './util.js'
import Entity from "./entity.js";

class NPC extends Entity {
    constructor(you, game = false) {
        super(game);

        this.you = you || uuidv4();

        this.type = 'NPC';

        this.immortal = true;

        this.serverProps = [
            'type', 'pos', 'vel', 'you', 'immortal', 'destX', 'destY', 'ticks', 'rFac'
        ];

        this.ticks = 601;
        this.rFac = Math.random() * 100;

        this.destX = 0;
        this.destY = 0;
    }
    handleTick(game) {
        this.ticks++;

        if (this.ticks >= this.rFac * 10) {
            this.ticks = 0;
            this.rFac = (this.rFac * 2385 + 293) % 100;
            
            this.destX = Math.sin(this.rFac) * ((this.rFac / 100) ** 4) * game.width;
            this.destY = Math.cos(this.rFac) * ((this.rFac / 100) ** 4) *  game.height;
        }

        let distX = (this.destX - this.pos.x);
        let distY = (this.destY - this.pos.y)

        this.vel.x += (distX + distY * this.rFac / 1000) * 0.0003;
        this.vel.y += (distY - distX * this.rFac / 1000) * 0.0003;

        this.vel.x *= 0.98;
        this.vel.y *= 0.98;

        this.pos.x += this.vel.x;
        this.pos.y += this.vel.y;

        this.bounce(game);
    }
}

export default NPC;