feat: directionalProjection

packages/math/vector/index.js

@@ -325,6 +325,19 @@ export function fromDirection(direction) {
   }
 }
 
+export function directionalProjection(direction, vector) {
+  switch (direction) {
+    case 0:
+      return [vector[0], -vector[1]];
+    case 1:
+      return [vector[1], vector[0]];
+    case 2:
+      return [vector[0], vector[1]];
+    case 3:
+      return [-vector[1], vector[0]];
+  }
+}
+
 export function interpolate(ultimate, actual, easing = 0) {
   if (0 === easing) {
     return ultimate;