From 29c701ce6ab7e128fcd7cd2022001256e63653ac Mon Sep 17 00:00:00 2001
From: fnicon <mybeddrom@gmail.com>
Date: Sat, 21 Mar 2026 12:01:06 +0900
Subject: [PATCH] fix infinite drift

---
 game/love_src/src/world/top_down_race/init.lua  |  4 ++--
 .../src/world/top_down_race/system/velocity.lua | 17 ++++++++++++++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/game/love_src/src/world/top_down_race/init.lua b/game/love_src/src/world/top_down_race/init.lua
index aaa5998..901cb39 100644
--- a/game/love_src/src/world/top_down_race/init.lua
+++ b/game/love_src/src/world/top_down_race/init.lua
@@ -31,8 +31,8 @@ function wrapper:load(_args)
     {
       assemblage = racer.assemble,
       data = {
-        accel = 20.0,
-        brake = 10.0,
+        accel = 200.0,
+        brake = 100.0,
         grip = 1.0,
         max_speed = 50.0,
         steer = 5.0,
diff --git a/game/love_src/src/world/top_down_race/system/velocity.lua b/game/love_src/src/world/top_down_race/system/velocity.lua
index d94761d..587468a 100644
--- a/game/love_src/src/world/top_down_race/system/velocity.lua
+++ b/game/love_src/src/world/top_down_race/system/velocity.lua
@@ -238,7 +238,8 @@ local magic_n = {
   scale_y = 1000.0,
   centrifugal_r = 1.0,
   magic_slowdown = 10.0,
-  magic_boost = 1000.0
+  magic_boost = 10000.0,
+  magic_slow_drift = 10.0
 }
 
 function system:update(dt)
@@ -285,6 +286,20 @@ function system:update(dt)
     local centrifugal = racing_phy.centrifugal_force(dt, mass, new_velocity * magic_n.centrifugal_r, max_speed)
     f_lateral = add_centrifugal(f_lateral, centrifugal)
 
+    if (not left and not right) then
+      if (not (left) and f_lateral > 0) then
+        f_lateral = f_lateral - (magic_n.magic_slow_drift)
+        if (f_lateral < 0) then
+          f_lateral = 0
+        end
+      elseif (not right and f_lateral < 0) then
+        f_lateral = f_lateral + (magic_n.magic_slow_drift)
+        if (f_lateral > 0) then
+          f_lateral = 0
+        end
+      end
+    end
+
     e[race.dict.inertia].data = {f_forward * dt, f_lateral * dt}
 
     local new_angle =  e["race.angle"].data + f_lateral * dt/mass