From 971fcd352a872109a72c545cc9517c8980918b17 Mon Sep 17 00:00:00 2001
From: aura <nw@moneybot.cc>
Date: Mon, 13 Jul 2026 19:57:37 +0200
Subject: add scaling rpm down when redline is hit below set point

---
 src/overlay.cpp | 59 +++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 51 insertions(+), 8 deletions(-)

(limited to 'src/overlay.cpp')

diff --git a/src/overlay.cpp b/src/overlay.cpp
index d1469b2..07691b1 100644
--- a/src/overlay.cpp
+++ b/src/overlay.cpp
@@ -51,34 +51,75 @@ void overlay_handle_teleport( OVERLAY_DATA* d ) {
   }
 }
 
-void overlay_handle_redline( OVERLAY_DATA* d ) {
+void overlay_handle_redline( OVERLAY_DATA* d, F64 dt, F64 now ) {
   TELEMETRY* t = &d->telem;
+  if( !t->car_ordinal || !t->race_on )
+    return;
 
-  if( !d->cfg.autoscale_rpm || d->valid_redline < 0.86f ) {
+  if( !d->cfg.autoscale_rpm ) {
     d->valid_redline = 0.86f;
     return;
   }
 
+  if( d->candidate_redline > 0.1f && now - d->redlinebang_time > .175f ) {
+    d->redlinechange_time = now;
+    d->target_redline = d->candidate_redline;
+    d->candidate_redline = 0.f;
+  }
+
+  if( d->valid_redline != d->target_redline ) {
+    F64 diff = d->target_redline - d->valid_redline;
+    if( fabs( diff ) > 0.001f ) {
+      F64 max = diff > 0 ? 0.1 : 0.0015 * dt;
+      if( diff > 0 && diff > max ) diff = max;
+      if( diff < 0 && diff < -max ) diff = -max;
+      d->valid_redline += diff;
+    }
+  }
+
   if( t->gear != d->last_gear ) {
+    d->candidate_redline = 0.f;
+    d->last_shifttime = now;
+
     if( t->gear != 0 && t->gear != 11 && t->gear > d->last_valid_gear )
       d->valid_shift = 1;
     else
       d->valid_shift = 0;
   }
 
+  F64 rpmr = (F64)(t->rpm) / t->rpm_max;
+  F64 rpmo = (F64)(t->rpm - d->cfg.rpm_off) / t->rpm_max;
   if( d->valid_shift ) {
-    F64 rpmr = (F64)(t->rpm) / t->rpm_max;
-    if( rpmr >= 0.99f )
+    if( rpmr >= 0.98f ) {
       d->valid_redline = 0.86f;
-    rpmr = (F64)(t->rpm - (I32)d->cfg.rpm_off) / t->rpm_max;
-    if( rpmr > d->valid_redline ) {
-      d->valid_redline = rpmr;
+      d->target_redline = 0.86f;
+    }
+    if( rpmo > d->target_redline ) {
+      d->target_redline = rpmo;
+    }
+  }
+
+  if( d->candidate_redline > 0.f && rpmo >= d->candidate_redline )
+    d->candidate_redline = rpmo;
+  else if( !d->candidate_redline ) {
+    F32 geartime = now - d->last_shifttime;
+    if( geartime > 0.9f && rpmo < d->valid_redline && t->power * 0.001341022 <= 1.f && t->accel >= 230 && t->gear != 11 ) {
+      d->candidate_redline = (F32)rpmo;
+      if( d->candidate_redline < d->valid_redline - 0.01f )
+        d->candidate_redline = d->valid_redline - 0.01f;
+
+      d->redlinebang_time = now;
     }
   }
 
   d->last_gear = t->gear;
   if( t->gear != 11 )
     d->last_valid_gear = t->gear;
+
+  if( d->valid_redline < 0.65f )
+    d->valid_redline = 0.65f;
+  if( d->target_redline < 0.65f )
+    d->target_redline = 0.65f;
 }
 
 void overlay_handle_car_changed( OVERLAY_DATA* d ) {
@@ -96,6 +137,8 @@ void overlay_handle_car_changed( OVERLAY_DATA* d ) {
     d->peak_boost_bar = 0.0;
     d->boost_since    = 0.0;
     d->valid_redline  = 0.86;
+    d->target_redline = 0.86;
+    d->candidate_redline = 0.f;
   }
 }
 
@@ -175,7 +218,7 @@ void overlay_update( OVERLAY_DATA* d, F64 now, F64 dt ) {
   d->was_live = live;
 
   overlay_handle_car_changed( d );
-  overlay_handle_redline( d );
+  overlay_handle_redline( d, dt, now );
   overlay_update_rpm_boost( d, live, dt, now );
 
   if( !t->extended )
-- 
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