From 6995cde01ff1e65e9e74c9851238d6a70793608a Mon Sep 17 00:00:00 2001
From: Pihkaal <hello@pihkaal.me>
Date: Thu, 26 Feb 2026 00:05:57 +0100
Subject: [PATCH] fix(3d-nds): wrong lag detection

---
 app/components/NDS3D.vue | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/app/components/NDS3D.vue b/app/components/NDS3D.vue
index 85030d4..c2fb190 100644
--- a/app/components/NDS3D.vue
+++ b/app/components/NDS3D.vue
@@ -200,9 +200,10 @@ watch(
 const { onRender, onBeforeRender } = useLoop();
 
 const LAG_FPS_THRESHOLD = 40;
-const LAG_DURATION_SECS = 1;
+const LAG_DURATION_SECS = 5;
 let lagSeconds = 0;
 let lagCheckDone = false;
+let lastFrameTime = Date.now();
 
 const HINT_SPRITE_SCALE = 2;
 const HINT_SPRITE_DPR = 4;
@@ -345,8 +346,17 @@ useKeyUp(({ ndsButton }) => {
 });
 
 // lag detection
-onBeforeRender(({ delta }) => {
+onBeforeRender(() => {
   if (!lagCheckDone) {
+    const now = Date.now();
+    const delta = (now - lastFrameTime) / 1000;
+    lastFrameTime = now;
+
+    if (document.hidden || delta > 0.5) {
+      lagSeconds = 0;
+      return;
+    }
+
     const fps = 1 / delta;
     if (fps < LAG_FPS_THRESHOLD) {
       lagSeconds += delta;