64 lines
1.7 KiB
TypeScript
64 lines
1.7 KiB
TypeScript
import {
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ComponentNames,
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FacingDirection as FacingDirectionComponent,
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BoundingBox,
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Sprite,
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} from "../components";
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import { Game } from "../Game";
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import { System, SystemNames, Input } from ".";
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import { Direction, angleToDirection } from "../interfaces";
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export class FacingDirection extends System {
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private input: Input;
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constructor(input: Input) {
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super(SystemNames.FacingDirection);
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this.input = input;
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}
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public update(_dt: number, game: Game) {
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const mousePosition = this.input.getMousePosition();
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const mouseBoundingBox = new BoundingBox(mousePosition, {
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width: 0,
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height: 0,
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});
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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.BoundingBox)) {
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return;
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}
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const boundingBox = entity.getComponent<BoundingBox>(
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ComponentNames.BoundingBox,
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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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const { center } = boundingBox;
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const angle = Math.atan2(
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mousePosition.y - center.y,
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mousePosition.x - center.x,
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);
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const mouseInBoundingBox =
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boundingBox.isCollidingWith(mouseBoundingBox);
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const direction = mouseInBoundingBox
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? Direction.NONE
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: angleToDirection(angle);
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facingDirection.setDirection(direction);
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const oldSprite = entity.getComponent<Sprite>(ComponentNames.Sprite);
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const sprite = facingDirection.directionSprites.get(direction)!;
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sprite.fillTimingsFromSprite(oldSprite);
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entity.addComponent(sprite);
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},
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);
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}
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}
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