time for a snapshot

workshop/steps/08-resolve/given.ts

@@ -0,0 +1,8 @@
+// Finished in earlier steps.
+export type Vec = { x: number; y: number };
+export const vec = (x: number, y: number): Vec => ({ x, y });
+export const add = (a: Vec, b: Vec): Vec => ({ x: a.x + b.x, y: a.y + b.y });
+export const scale = (a: Vec, s: number): Vec => ({ x: a.x * s, y: a.y * s });
+
+/** From step 06/07. */
+export type Hit = { time: number; normal: Vec };