From 74bc7163a2aab002055c7567c9333577d230cb36 Mon Sep 17 00:00:00 2001
From: nvms <jon@pye.rs>
Date: Mon, 9 Sep 2024 09:39:57 -0400
Subject: [PATCH] adjust fps calc

---
 packages/ngn/src/ngn.ts | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/packages/ngn/src/ngn.ts b/packages/ngn/src/ngn.ts
index 4c09c6d..0c081d6 100644
--- a/packages/ngn/src/ngn.ts
+++ b/packages/ngn/src/ngn.ts
@@ -146,22 +146,28 @@ export const createWorld = () => {
      * Fake requestAnimationFrame and cancelAnimationFrame
      * so that we can run tests for this in node.
      */
-    if (typeof window !== "undefined") {
-      raf = requestAnimationFrame;
-      craf = cancelAnimationFrame;
-    } else {
-      let now = 0;
-      raf = (cb: FrameRequestCallback): number => {
-        return setTimeout(() => {
-          now += 16.67;
-          cb(now);
-        }, 16.67) as unknown as number;
-      };
+     if (typeof window !== "undefined") {
+       let now = performance.now();
+       raf = (cb: FrameRequestCallback): number => {
+         return requestAnimationFrame((timestamp) => {
+           now = timestamp;
+           cb(now);
+         });
+       };
+       craf = cancelAnimationFrame;
+     } else {
+       let now = 0;
+       raf = (cb: FrameRequestCallback): number => {
+         return setTimeout(() => {
+           now += 16.67;
+           cb(now);
+         }, 16.67) as unknown as number;
+       };
 
-      craf = (id: number) => {
-        clearTimeout(id);
-      };
-    }
+       craf = (id: number) => {
+         clearTimeout(id);
+       };
+     }
 
     let xfps = 1;
     const xtimes = [];