added round to Pos3

src/lib/Pos3.hx

@@ -96,4 +96,12 @@ abstract Pos3(Vec3<Float>) from Vec3<Float> to Vec3<Float>{
 	public function toString():String {
 		return 'Pos3(${this.x}, ${this.y}, ${this.z})';
 	}
+
+	public function round():Pos3 {
+		return new Pos3({
+			x: Math.fround(this.x),
+			y: Math.fround(this.y),
+			z: Math.fround(this.z)
+		});
+	}
 }