feat(math): add cossin(), add opt scale arg for sincos()

thi-ng · Nov 1, 2018 · 0043fb5 · 0043fb5
1 parent 184d55d
commit 0043fb5
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/packages/math/src/angle.ts b/packages/math/src/angle.ts
@@ -6,8 +6,11 @@ import {
     TAU
 } from "./api";
 
-export const sincos = (theta: number) =>
-    [Math.sin(theta), Math.cos(theta)];
+export const sincos = (theta: number, n = 1) =>
+    [Math.sin(theta) * n, Math.cos(theta) * n];
+
+export const cossin = (theta: number, n = 1) =>
+    [Math.cos(theta) * n, Math.sin(theta) * n];
 
 export const absTheta = (theta: number) =>
     (theta %= TAU, theta < 0 ? TAU + theta : theta);