Fixed acceleration not matching direction

project.godot

@@ -72,6 +72,6 @@ throttle_up={
 }
 throttle_down={
 "deadzone": 0.2,
-"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":true,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":32,"key_label":0,"unicode":32,"location":0,"echo":false,"script":null)
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194325,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
 ]
 }

scenes/jet.gd

@@ -32,6 +32,7 @@ func _physics_process(delta: float) -> void:
 	if action:
 		control_frame.do_action(action, delta, self)
 
+	velocity = -transform.basis.z * control_frame.speed
 	move_and_slide()
 
 #func _unhandled_input(event: InputEvent) -> void:

scripts/jet_variants/base_jet.gd

@@ -8,7 +8,9 @@ var YAW_SPEED: int    = 50
 var ROLL_SPEED: int   = 100
 var MIN_SPEED: int    = 200
 var MAX_SPEED: int    = 2000
-var ACCELERATION: int = 5
+var ACCELERATION: int = 15
+
+var speed: float      = float(MIN_SPEED)
 
 
 func do_action(
@@ -32,9 +34,9 @@ func do_action(
 		"roll_right":
 			roll_right(change_rate, jet)
 		"throttle_up":
-			throttle_up(delta, jet)
+			throttle_up(delta)
 		"throttle_down":
-			throttle_down(delta, jet)
+			throttle_down(delta)
 		_:
 			pass
 
@@ -56,20 +58,8 @@ func roll_left(change_rate: float, jet: Jet) -> void:
 func roll_right(change_rate: float, jet: Jet) -> void:
 	jet.rotate_object_local(Vector3.FORWARD, change_rate * ROLL_SPEED)
 
-func throttle_up(delta: float, jet: Jet) -> void:
-	jet.velocity += (jet.transform.basis.z * -(delta * ACCELERATION))
-	#clamp(
-		#jet.velocity,
-		#MIN_SPEED * Vector3.ONE,
-		#MAX_SPEED * Vector3.ONE
-	#)
+func throttle_up(delta: float) -> void:
+	speed = move_toward(speed, MAX_SPEED, ACCELERATION * delta)
 
-	jet.velocity = jet.velocity.limit_length(MAX_SPEED)
-
-func throttle_down(delta: float, jet: Jet) -> void:
-	jet.velocity += (jet.transform.basis.z * (delta * ACCELERATION))
-	clamp(
-		jet.velocity,
-		MIN_SPEED * Vector3.ONE,
-		MAX_SPEED * Vector3.ONE
-	)
+func throttle_down(delta: float) -> void:
+	speed = move_toward(speed, MIN_SPEED, ACCELERATION * delta)