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import { System, SystemNames } from ".";
import { BoundingBox, ComponentNames, Sprite } from "../components";
import type { Entity } from "../entities";
import type { DrawArgs } from "../interfaces";
export class Render extends System {
private ctx: CanvasRenderingContext2D;
constructor(ctx: CanvasRenderingContext2D) {
super(SystemNames.Render);
this.ctx = ctx;
}
public update(
dt: number,
entityMap: Map<number, Entity>,
componentEntities: Map<string, Set<number>>
) {
this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
componentEntities.get(ComponentNames.Sprite)?.forEach((entityId) => {
const entity = entityMap.get(entityId);
const sprite = entity.getComponent<Sprite>(ComponentNames.Sprite);
sprite.update(dt);
let drawArgs: DrawArgs;
if (entity.hasComponent(ComponentNames.BoundingBox)) {
const boundingBox = entity.getComponent<BoundingBox>(
ComponentNames.BoundingBox
);
drawArgs = {
center: boundingBox.center,
dimension: boundingBox.dimension,
rotation: boundingBox.rotation,
};
}
sprite.draw(this.ctx, drawArgs);
});
}
}
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