Snow fullscreen effect implemented

js/effects/SnowEffect.js

@@ -0,0 +1,31 @@
+import {FullscreenEffect} from "./FullscreenEffect.js";
+
+export class SnowEffect extends FullscreenEffect
+{
+	static NAME = 'snow';
+
+	constructor()
+	{
+		super();
+		this.image = new Image();
+		this.image.src = '/js/effects/snow.png';
+		this.offset = 0;
+	}
+
+	update(timestamp)
+	{
+		super.update(timestamp);
+		this.offset = timestamp % 512;
+	}
+
+	render(context)
+	{
+		super.render(context);
+
+		for (let y = -1; y < Math.ceil(context.canvas.height / 512); y++) {
+			for (let x = -1; x < Math.ceil(context.canvas.width / 512); x++) {
+				context.drawImage(this.image, this.offset + 512 * x, this.offset + 512 * y);
+			}
+		}
+	}
+}