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