core2d/src/plugin/RandomRectTransition.mjs

Multiplatform 2D interaction engine

"use strict";

import { Color } from "../Color.mjs";
import { Core2D } from "../Core2D.mjs";
import { Sprite } from "../Sprite.mjs";

export class RandomRectTransition extends Sprite {
  init() {
    this.columns = 16;
    this.rows = 8;
    this.setColor(Color.Black);
    this.setWidth(this.scene.width / this.columns);
    this.setHeight(this.scene.height / this.rows);
    this.rects = [];

    for (let i = 0; i < this.columns * this.rows; ++i) {
      this.rects.push(i);
    }
  }

  sync() {
    if (!this.rects.length) {
      return true;
    }

    const number = this.rects.splice(Core2D.random(this.rects.length - 1), 1);
    const column = number % this.columns;
    const row = Math.floor(number / this.columns);
    this.x = column * this.width;
    this.y = row * this.height;
    return Sprite.prototype.sync.call(this);
  }
}