From 1d00505ca7e6d8facd0cea131f1b01b97145e8f7 Mon Sep 17 00:00:00 2001
From: zypherift <zypherift@firka.app>
Date: Wed, 4 Mar 2026 23:09:27 +0100
Subject: [PATCH] edit: fine tune wall collision vibration

---
 firka/lib/ui/phone/screens/login/login_screen.dart | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/firka/lib/ui/phone/screens/login/login_screen.dart b/firka/lib/ui/phone/screens/login/login_screen.dart
index 86f62e0..b3e08ce 100644
--- a/firka/lib/ui/phone/screens/login/login_screen.dart
+++ b/firka/lib/ui/phone/screens/login/login_screen.dart
@@ -816,32 +816,42 @@ class _FloatingCardsSlideState extends State<_FloatingCardsSlide>
           double vx = _velocities[i].dx;
           double vy = _velocities[i].dy;
 
+          // capture incoming velocity components before any bounce damping
+          final double preVx = vx;
+          final double preVy = vy;
+          double impactSpeed = 0.0; // normal to the wall
+
           bool hit = false;
 
           if (pos.dx < minX) {
             pos = Offset(minX, pos.dy);
             vx = vx.abs() * _bounceDamping;
+            impactSpeed = math.max(impactSpeed, preVx.abs());
             hit = true;
           } else if (pos.dx > maxX) {
             pos = Offset(maxX, pos.dy);
             vx = -vx.abs() * _bounceDamping;
+            impactSpeed = math.max(impactSpeed, preVx.abs());
             hit = true;
           }
 
           if (pos.dy < minY) {
             pos = Offset(pos.dx, minY);
             vy = vy.abs() * _bounceDamping;
+            impactSpeed = math.max(impactSpeed, preVy.abs());
             hit = true;
           } else if (pos.dy > maxY) {
             pos = Offset(pos.dx, maxY);
             vy = -vy.abs() * _bounceDamping;
+            impactSpeed = math.max(impactSpeed, preVy.abs());
             hit = true;
           }
 
           _velocities[i] = _clampVel(Offset(vx, vy));
           _positions[i] = pos;
 
-          if (hit && _velocities[i].distance > _vibrateSpeedThreshold) {
+          // vibrate only when the component toward the wall exceeded threshold
+          if (hit && impactSpeed > _vibrateSpeedThreshold) {
             wallHitThisTick = true;
           }
         }