47 lines
1.3 KiB
TypeScript
47 lines
1.3 KiB
TypeScript
import {
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ComponentNames,
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Velocity,
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FacingDirection as FacingDirectionComponent,
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Control,
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} from "../components";
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import { Game } from "../Game";
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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(_dt: number, game: Game) {
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game.forEachEntityWithComponent(
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ComponentNames.FacingDirection,
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(entity) => {
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if (!entity.hasComponent(ComponentNames.Velocity)) {
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return;
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}
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const totalVelocityComponent = new Velocity();
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const control = entity.getComponent<Control>(ComponentNames.Control);
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const velocity = entity.getComponent<Velocity>(
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ComponentNames.Velocity,
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).velocity;
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totalVelocityComponent.add(velocity);
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if (control) {
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totalVelocityComponent.add(control.controlVelocityComponent.velocity);
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}
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const facingDirection = entity.getComponent<FacingDirectionComponent>(
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ComponentNames.FacingDirection,
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);
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if (totalVelocityComponent.velocity.dCartesian.dx > 0) {
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entity.addComponent(facingDirection.facingRightSprite);
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} else if (totalVelocityComponent.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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}
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