Round caps!

client/math.js

@@ -1,3 +1,8 @@
+function point_right_of_line(a, b, p) {
+    // a bit of cross-product tomfoolery (we check sign of z of the crossproduct)
+    return ((b.x - a.x) * (a.y - p.y) - (a.y - b.y) * (p.x - a.x)) <= 0;
+}
+
 function rdp_find_max(points, start, end) {
     const EPS = 0.25;