time for a snapshot

workshop/steps/03-integration/motion.ts

@@ -0,0 +1,9 @@
+import { add, scale, type Vec } from "./given.ts";
+
+/**
+ * Advance a position by a velocity over `delta` milliseconds.
+ * newPosition = position + velocity * delta
+ */
+export function integrate(pos: Vec, vel: Vec, delta: number): Vec {
+	return add(pos, scale(vel, delta));
+}