time for a snapshot

2026-07-11 17:48:28 +02:00
parent 135b7c3042
commit 7262752e16
47 changed files with 1712 additions and 61 deletions
@@ -0,0 +1,6 @@
+// Finished in earlier steps.
+export type Vec = { x: number; y: number };
+export const vec = (x: number, y: number): Vec => ({ x, y });
+export const sub = (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 });
+export const dot = (a: Vec, b: Vec): number => a.x * b.x + a.y * b.y;