From 2f8fdcf5cdf7b9ff62bc3139f08ab5e33d297fbe Mon Sep 17 00:00:00 2001
From: fnicon <mybeddrom@gmail.com>
Date: Sun, 22 Mar 2026 00:13:43 +0900
Subject: [PATCH] Update racer system

---
 game/love_src/src/system/racing_force.lua     | 13 ++---
 .../world/top_down_race/component/race.lua    | 27 +++-------
 .../love_src/src/world/top_down_race/init.lua | 17 +++---
 .../world/top_down_race/system/velocity.lua   | 52 ++++++++++---------
 .../world/top_down_race/template/racer.lua    | 16 +++---
 5 files changed, 59 insertions(+), 66 deletions(-)

diff --git a/game/love_src/src/system/racing_force.lua b/game/love_src/src/system/racing_force.lua
index 959f244..e9f3c49 100644
--- a/game/love_src/src/system/racing_force.lua
+++ b/game/love_src/src/system/racing_force.lua
@@ -50,12 +50,11 @@ end
 ---@param f vec2 input
 ---@param drag number|vec2 drag
 ---@param streamline number car's streamline
----@param weight_drag_boost number? magic weight
----@param weight_drag_halt number? magic weight
+---@param weight_drag number? magic weight
 ---@return vec2 f
-local function add_drag(v, drag, streamline, weight_drag_boost, weight_drag_halt)
+local function add_drag(v, drag, streamline, weight_drag)
   local f_drag = drag_force(drag, streamline)
-  return v + f_drag * ((weight_drag_boost or 1.0) - (weight_drag_halt or 0.0))
+  return v + f_drag * (weight_drag or 1.0)
 end
 
 ---add inertia into f
@@ -112,6 +111,7 @@ end
 ---@param grip number car's grip
 ---@param friction number outside's friction
 ---@param drag number|vec2 outside's drag
+---@param drag_movement number drag from moving
 ---@param streamline number car's streamline
 ---@param inertia_force vec2 last's force
 ---@param mass number car's mass
@@ -128,7 +128,7 @@ local function force_workflow(
   -- friction
   grip, friction,
   -- drag
-  drag, streamline,
+  drag, drag_movement, streamline,
   -- inertia
   inertia_force,
   -- centrifugal
@@ -141,7 +141,8 @@ local function force_workflow(
 )
   local val = add_desire(desire_forward, desire_steer, weight_forward, weight_steer)
   val = add_friction(val, grip, friction, weight_tire, weight_floor)
-  val = add_drag(val, drag, streamline, weight_drag_boost, weight_drag_halt)
+  val = add_drag(val, drag, streamline, weight_drag_boost)
+  val = add_drag(val, drag_movement, streamline, weight_drag_halt)
   val = add_inertia(val, inertia_force, weight_inertia)
   val = add_centrifugal(val, mass, inertia_force, weight_centrifugal)
 
diff --git a/game/love_src/src/world/top_down_race/component/race.lua b/game/love_src/src/world/top_down_race/component/race.lua
index 5033e7f..e6497e5 100644
--- a/game/love_src/src/world/top_down_race/component/race.lua
+++ b/game/love_src/src/world/top_down_race/component/race.lua
@@ -1,3 +1,5 @@
+local vm = require("lib.vornmath")
+
 local components = {}
 
 components.dict = {
@@ -7,16 +9,13 @@ components.dict = {
   grip = "race.grip",
   steer = "race.steer",
   brake = "race.brake",
-  decel = "race.decel",
-  drag = "race.drag",
   mass = "race.mass",
   inertia = "race.inertia",
-  inertia_dir = "race.inertia_dir",
-  streamline = "race.streamline"
+  streamline = "race.streamline",
 }
 
-function components.velocity (c, x)
-  c.data = x
+function components.velocity (c, x, y)
+  c.data = vm.vec2(x, y)
 end
 
 function components.max_speed (c, x)
@@ -39,24 +38,12 @@ function components.brake (c, x)
   c.data = x
 end
 
-function components.decel (c, x)
-  c.data = x
-end
-
-function components.drag (c, x)
-  c.data = x
-end
-
 function components.mass (c, x)
   c.data = x
 end
 
-function components.inertia (c, x)
-  c.data = x
-end
-
-function components.inertia_dir (c, x, y)
-  c.data = {x, y}
+function components.inertia (c, x, y)
+  c.data = vm.vec2(x, y)
 end
 
 function components.streamline (c, x)
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 901cb39..5c41d3f 100644
--- a/game/love_src/src/world/top_down_race/init.lua
+++ b/game/love_src/src/world/top_down_race/init.lua
@@ -31,15 +31,16 @@ function wrapper:load(_args)
     {
       assemblage = racer.assemble,
       data = {
-        accel = 200.0,
-        brake = 100.0,
-        grip = 1.0,
-        max_speed = 50.0,
-        steer = 5.0,
-        velocity = 0.0,
+        velocity = {0.0, 0.0},
+        max_speed = 10.0,
+
+        accel = 10.0,
+        brake = 10.0,
+        grip = 10.0,
+        steer = 10.0,
         inertia = {0.0, 0.0},
-        drag = 1.0,
-        mass = 1.0
+        mass = 10.0,
+        streamline = 1.0
       }
     }
   })
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 90dfa8f..2912a68 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
@@ -13,30 +13,27 @@ system.__index = system
 
 system.pool = {
   pool = {
+    race.dict.max_speed,
+    race.dict.velocity,
     race.dict.accel,
     race.dict.brake,
     race.dict.grip,
-    race.dict.max_speed,
     race.dict.steer,
-    race.dict.velocity,
     race.dict.inertia,
-    race.dict.inertia_dir,
-    race.dict.drag,
     race.dict.mass,
     race.dict.streamline
   }
 }
 
 system.components = {
+  [race.dict.max_speed] = race.max_speed,
+  [race.dict.velocity] = race.velocity,
+
   [race.dict.accel] = race.accel,
   [race.dict.brake] = race.brake,
   [race.dict.grip] = race.grip,
-  [race.dict.max_speed] = race.max_speed,
   [race.dict.steer] = race.steer,
-  [race.dict.velocity] = race.velocity,
   [race.dict.inertia] = race.inertia,
-  [race.dict.inertia_dir] = race.inertia_dir,
-  [race.dict.drag] = race.drag,
   [race.dict.mass] = race.mass,
   [race.dict.streamline] = race.streamline
 }
@@ -55,16 +52,14 @@ end
 
 local function get(e)
   return
+    e[race.dict.max_speed].data,
+    e[race.dict.velocity].data,
     e[race.dict.accel].data,
     e[race.dict.brake].data,
     e[race.dict.grip].data,
-    e[race.dict.max_speed].data,
     e[race.dict.steer].data,
-    e[race.dict.velocity].data,
-    e[race.dict.drag].data,
     e[race.dict.inertia].data,
     e[race.dict.mass].data,
-    e[race.dict.inertia_dir].data,
     e[race.dict.streamline].data
 end
 
@@ -124,6 +119,12 @@ local frictions = {
   }
 }
 
+local drags = {
+  {
+    drag = vm.vec2(1.0, 0.0)
+  }
+}
+
 -- x1 y1        -- (x1 + w1) y1
 --          x2 y2
 -- x1 (y1 + h1) -- (x1 + w1) (y1 + h1)
@@ -155,13 +156,12 @@ local magic_w = {
   drag_halt = 1.5,
   inertia = 1.0,
   centrifugal = 1.0,
+  drag_movement = 1.0
   -- magic_slowdown = 10.0,
   -- magic_boost = 10000.0,
   -- magic_slow_drift = 10.0
 }
 
-local drag_dir = vm.vec2(1.0, 0.0)
-
 local function handle_input(accel, brake, steer)
   local up = love.keyboard.isDown("up")
   local down = love.keyboard.isDown("down")
@@ -185,19 +185,19 @@ end
 
 function system:update(dt)
   for _, e in ipairs(self.pool) do
-    local accel, brake, grip, max_speed, steer, velocity, drag, inertia, mass, inertia_dir, streamline = get(e)
-
+    local max_speed, velocity, accel, brake, grip, steer, inertia, mass, streamline = get(e)
 
     local pos_x, pos_y = e["race.pos"].data[1], e["race.pos"].data[2]
 
     local friction = get_friction(pos_x, pos_y, frictions)
+    local drag = drags[1].drag
 
     local desire_forward, desire_steer = handle_input(accel, brake, steer)
 
     local force = racing_force(
       desire_forward, desire_steer,
       grip, friction,
-      drag, streamline,
+      drag, magic_w.drag_movement, streamline,
       inertia,
       mass,
       magic_w.forward, magic_w.steer,
@@ -217,6 +217,8 @@ function system:update(dt)
     end
     local a = force * dt / mass
 
+    e[race.dict.velocity].data = e[race.dict.velocity].data + a
+
     -- local new_velocity = racing_phy.accelerate(dt, 1, velocity, max_speed, f_forward*dt/mass, 0)
 
     -- if (not left and not right) then
@@ -235,15 +237,15 @@ function system:update(dt)
 
     e[race.dict.inertia].data = force
 
-    local new_angle =  e["race.angle"].data + f_lateral * dt/mass
-    e["race.angle"].data = new_angle
-    e[race.dict.velocity].data = new_velocity
+    -- local new_angle =  e["race.angle"].data + f_lateral * dt/mass
+    -- e["race.angle"].data = new_angle
+    -- e[race.dict.velocity].data = new_velocity
 
-    local goal_x, goal_y = racing_phy.drift(dt, pos_x, pos_y, new_velocity, max_speed, new_angle, magic_n.scale_x, magic_n.scale_y)
+    -- local goal_x, goal_y = racing_phy.drift(dt, pos_x, pos_y, new_velocity, max_speed, new_angle, magic_n.scale_x, magic_n.scale_y)
     -- print("force_forward", f_forward, "f_lateral", f_lateral, "velocity", new_velocity, "angle", new_angle, "goal_x", goal_x, "goal_y", goal_y)
 
-    e["race.pos"].data[1] = goal_x
-    e["race.pos"].data[2] = goal_y
+    -- e["race.pos"].data[1] = goal_x
+    -- e["race.pos"].data[2] = goal_y
   end
 end
 
@@ -261,8 +263,8 @@ function system:draw()
     local image = e["race.image"].data.image
     local origin = e["race.image"].data.origin
     --draw(velocity, x, y, sx, sy, angle, image, origin)
-    local vx = 0
-    local vy = 0
+    local vx = e[race.dict.velocity].data[1]
+    local vy = e[race.dict.velocity].data[2]
     test.set_sphere(x, y, vx, vy)
   end
 end
diff --git a/game/love_src/src/world/top_down_race/template/racer.lua b/game/love_src/src/world/top_down_race/template/racer.lua
index 1abe821..5761ead 100644
--- a/game/love_src/src/world/top_down_race/template/racer.lua
+++ b/game/love_src/src/world/top_down_race/template/racer.lua
@@ -3,26 +3,28 @@ local race = require("love_src.src.world.top_down_race.component.race")
 local template = {}
 
 template.default_data = {
+  velocity = {0.0, 0.0},
+  max_speed = 10.0,
+
   accel = 10.0,
   brake = 10.0,
   grip = 10.0,
-  max_speed = 10.0,
   steer = 10.0,
-  velocity = 0.0,
   inertia = {0.0, 0.0},
-  drag = 2.0,
-  mass = 10.0
+  mass = 10.0,
+  streamline = 1.0
 }
 function template.assemble(e, data)
+  e:give(race.dict.max_speed, data.max_speed)
+  e:give(race.dict.velocity, data.velocity[1], data.velocity[2])
+
   e:give(race.dict.accel, data.accel)
   e:give(race.dict.brake, data.brake)
   e:give(race.dict.grip, data.grip)
-  e:give(race.dict.max_speed, data.max_speed)
   e:give(race.dict.steer, data.steer)
-  e:give(race.dict.velocity, data.velocity)
   e:give(race.dict.inertia, data.inertia[1], data.inertia[2])
-  e:give(race.dict.drag, data.drag)
   e:give(race.dict.mass, data.mass)
+  e:give(race.dict.streamline, data.streamline)
 end
 
 return template