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124 lines
3.7 KiB
124 lines
3.7 KiB
import { enumDirection, Vector } from "../../core/vector";
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import { types } from "../../savegame/serialization";
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import { BeltPath } from "../belt_path";
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import { Component } from "../component";
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export const curvedBeltLength = /* Math.PI / 4 */ 0.78;
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/** @type {import("./item_acceptor").ItemAcceptorSlot} */
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export const FAKE_BELT_ACCEPTOR_SLOT = {
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pos: new Vector(0, 0),
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directions: [enumDirection.bottom],
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};
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/** @type {Object<enumDirection, import("./item_ejector").ItemEjectorSlot>} */
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export const FAKE_BELT_EJECTOR_SLOT_BY_DIRECTION = {
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[enumDirection.top]: {
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pos: new Vector(0, 0),
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direction: enumDirection.top,
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item: null,
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progress: 0,
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},
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[enumDirection.right]: {
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pos: new Vector(0, 0),
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direction: enumDirection.right,
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item: null,
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progress: 0,
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},
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[enumDirection.left]: {
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pos: new Vector(0, 0),
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direction: enumDirection.left,
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item: null,
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progress: 0,
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},
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};
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export class BeltComponent extends Component {
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static getId() {
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return "Belt";
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}
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/**
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*
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* @param {object} param0
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* @param {enumDirection=} param0.direction The direction of the belt
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*/
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constructor({ direction = enumDirection.top }) {
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super();
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this.direction = direction;
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/**
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* The path this belt is contained in, not serialized
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* @type {BeltPath}
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*/
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this.assignedPath = null;
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}
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clear() {
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if (this.assignedPath) {
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this.assignedPath.clearAllItems();
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}
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}
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/**
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* Returns the effective length of this belt in tile space
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* @returns {number}
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*/
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getEffectiveLengthTiles() {
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return this.direction === enumDirection.top ? 1.0 : curvedBeltLength;
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}
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/**
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* Returns fake acceptor slot used for matching
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* @returns {import("./item_acceptor").ItemAcceptorSlot}
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*/
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getFakeAcceptorSlot() {
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return FAKE_BELT_ACCEPTOR_SLOT;
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}
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/**
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* Returns fake acceptor slot used for matching
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* @returns {import("./item_ejector").ItemEjectorSlot}
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*/
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getFakeEjectorSlot() {
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assert(
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FAKE_BELT_EJECTOR_SLOT_BY_DIRECTION[this.direction],
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"Invalid belt direction: ",
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this.direction
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);
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return FAKE_BELT_EJECTOR_SLOT_BY_DIRECTION[this.direction];
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}
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/**
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* Converts from belt space (0 = start of belt ... 1 = end of belt) to the local
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* belt coordinates (-0.5|-0.5 to 0.5|0.5)
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* @param {number} progress
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* @returns {Vector}
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*/
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transformBeltToLocalSpace(progress) {
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assert(progress >= 0.0, "Invalid progress ( < 0): " + progress);
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switch (this.direction) {
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case enumDirection.top:
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assert(progress <= 1.02, "Invalid progress: " + progress);
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return new Vector(0, 0.5 - progress);
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case enumDirection.right: {
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assert(progress <= curvedBeltLength + 0.02, "Invalid progress 2: " + progress);
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const arcProgress = (progress / curvedBeltLength) * 0.5 * Math.PI;
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return new Vector(0.5 - 0.5 * Math.cos(arcProgress), 0.5 - 0.5 * Math.sin(arcProgress));
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}
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case enumDirection.left: {
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assert(progress <= curvedBeltLength + 0.02, "Invalid progress 3: " + progress);
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const arcProgress = (progress / curvedBeltLength) * 0.5 * Math.PI;
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return new Vector(-0.5 + 0.5 * Math.cos(arcProgress), 0.5 - 0.5 * Math.sin(arcProgress));
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}
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default:
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assertAlways(false, "Invalid belt direction: " + this.direction);
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return new Vector(0, 0);
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}
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}
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}
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