From 0fd9fb097552686f2257c1aa689d797e80057bd1 Mon Sep 17 00:00:00 2001
From: Elizabeth Hunt <elizabeth.hunt@simponic.xyz>
Date: Wed, 19 Jul 2023 20:38:24 -0700
Subject: initial commit

---
 client/lib/systems/Render.ts | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 client/lib/systems/Render.ts

(limited to 'client/lib/systems/Render.ts')

diff --git a/client/lib/systems/Render.ts b/client/lib/systems/Render.ts
new file mode 100644
index 0000000..0c76b00
--- /dev/null
+++ b/client/lib/systems/Render.ts
@@ -0,0 +1,41 @@
+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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