core2d/src/Static.mjs

Multiplatform 2D interaction engine

"use strict";

import { ACL } from "./ACL.mjs";

export class Static {
  static checkCollisions(sprites) {
    const LENGTH = sprites.length;

    for (let i = 0; i < LENGTH - 1; ++i) {
      const LEFT_SPRITE = sprites[i];

      for (let j = i + 1; j < LENGTH; ++j) {
        const RIGHT_SPRITE = sprites[j];

        if (LEFT_SPRITE.hasCollision(RIGHT_SPRITE)) {
          LEFT_SPRITE.collided = true;
          LEFT_SPRITE.onCollision(RIGHT_SPRITE);
          RIGHT_SPRITE.collided = true;
          RIGHT_SPRITE.onCollision(LEFT_SPRITE);
        }
      }
    }
  }

  static getElement(id) {
    const element = ACL.document.getElementById(id);

    if (!element) {
      console.warn(`Could not find element with id: ${id}`);
    }

    return element;
  }

  static getElements(name) {
    return Array.from(ACL.document.getElementsByTagName(name));
  }

  static getGamepads() {
    if (!navigator.getGamepads) {
      return [];
    }

    return navigator.getGamepads();
  }

  static getImage(image) {
    if ("string" == typeof image) {
      return this.getElement(image);
    }

    return image;
  }

  static makeEnum(array) {
    return this.makeHash(array, true);
  }

  static makeHash(array, indexed) {
    const RESULT = {};

    for (let i = 0; i < array.length; ++i) {
      const VALUE = array[i];
      RESULT[VALUE] = indexed ? i : VALUE;
    }

    return RESULT;
  }

  static toDegrees(radians) {
    return (radians * 180) / Math.PI;
  }

  static toRadians(degrees) {
    return (degrees * Math.PI) / 180;
  }
}