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91 lines
3.0 KiB
91 lines
3.0 KiB
import { Component } from "../game/component";
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import { Entity } from "../game/entity";
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import { globalConfig } from "./config";
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import { createLogger } from "./logging";
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import { Rectangle } from "./rectangle";
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const logger = createLogger("stale_areas");
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export class StaleAreaDetector {
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/**
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*
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* @param {object} param0
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* @param {import("../game/root").GameRoot} param0.root
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* @param {string} param0.name The name for reference
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* @param {(Rectangle) => void} param0.recomputeMethod Method which recomputes the given area
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*/
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constructor({ root, name, recomputeMethod }) {
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this.root = root;
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this.name = name;
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this.recomputeMethod = recomputeMethod;
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/** @type {Rectangle} */
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this.staleArea = null;
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}
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/**
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* Invalidates the given area
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* @param {Rectangle} area
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*/
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invalidate(area) {
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// logger.log(this.name, "invalidated", area.toString());
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if (this.staleArea) {
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this.staleArea = this.staleArea.getUnion(area);
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} else {
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this.staleArea = area.clone();
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}
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}
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/**
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* Makes this detector recompute the area of an entity whenever
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* it changes in any way
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* @param {Array<typeof Component>} components
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* @param {number} tilesAround How many tiles arround to expand the area
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*/
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recomputeOnComponentsChanged(components, tilesAround) {
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const componentIds = components.map(component => component.getId());
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/**
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* Internal checker method
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* @param {Entity} entity
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*/
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const checker = entity => {
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if (!this.root.gameInitialized) {
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return;
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}
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// Check for all components
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for (let i = 0; i < componentIds.length; ++i) {
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if (entity.components[componentIds[i]]) {
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// Entity is relevant, compute affected area
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const area = entity.components.StaticMapEntity.getTileSpaceBounds().expandedInAllDirections(
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tilesAround
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);
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this.invalidate(area);
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return;
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}
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}
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};
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this.root.signals.entityAdded.add(checker);
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this.root.signals.entityChanged.add(checker);
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this.root.signals.entityComponentRemoved.add(checker);
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this.root.signals.entityGotNewComponent.add(checker);
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this.root.signals.entityDestroyed.add(checker);
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}
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/**
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* Updates the stale area
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*/
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update() {
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if (this.staleArea) {
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if (G_IS_DEV && globalConfig.debug.renderChanges) {
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logger.log(this.name, "is recomputing", this.staleArea.toString());
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this.root.hud.parts.changesDebugger.renderChange(this.name, this.staleArea, "#fd145b");
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}
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this.recomputeMethod(this.staleArea);
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this.staleArea = null;
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}
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}
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}
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