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