40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
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import {
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ComponentNames,
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Velocity,
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FacingDirection as FacingDirectionComponent,
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} from "../components";
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import type { Entity } from "../entities";
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import { System, SystemNames } from "./";
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export class FacingDirection extends System {
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constructor() {
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super(SystemNames.FacingDirection);
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}
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public update(
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_dt: number,
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entityMap: Map<number, Entity>,
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componentEntities: Map<string, Set<number>>
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) {
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componentEntities
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.get(ComponentNames.FacingDirection)
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?.forEach((entityId) => {
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const entity = entityMap.get(entityId);
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if (!entity.hasComponent(ComponentNames.Velocity)) {
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return;
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}
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const velocity = entity.getComponent<Velocity>(ComponentNames.Velocity);
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const facingDirection = entity.getComponent<FacingDirectionComponent>(
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ComponentNames.FacingDirection
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);
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if (velocity.dCartesian.dx > 0) {
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entity.addComponent(facingDirection.facingRightSprite);
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} else if (velocity.dCartesian.dx < 0) {
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entity.addComponent(facingDirection.facingLeftSprite);
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}
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});
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}
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}
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