Can anyone help me with adding a boost to my car game?

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1

Godot Version

My version is 4.7.2

Question

Im new to programming in godot so I know its definitely not super neat or optimized, but for me I think its pretty good!
I have really struggled adding a boost mechanic to my game that actually works. Basically I want it when you touch the shift button, you increase in speed over about a second and then slow down after than. Its then on hold for something like 5 seconds.

I just need help with this tiny bit, thank uu :face_holding_back_tears: :face_holding_back_tears:

(Also I have tried creating a timer but it either just pauses the car or just doesnt work)

extends CharacterBody2D

var rotation_speed = 3
var max_speedOG = 500
var max_speed = 500
var min_speedOG = -100
var min_speed = 0
var accel = 500
var deaccel = 4
var speed = 0

var ReverseIsFalse = 1
func _physics_process(delta: float) -> void:
	print(speed, "  speed  ", velocity, "  Velocity  ", ReverseIsFalse, "  ReverseIsFalse?  ")
	 #Shouldnt be if Vector2.zero as is means it will only slow down when you arent touching it (including turning)
	if speed >= max_speed: 
		speed = max_speed
	
	if not Input.is_action_pressed("Accelerate") or not Input.is_action_pressed("Brake"):
		if speed >= min_speed:
			speed -= sqrt(abs(speed))*delta
		else:
			speed += sqrt(abs(speed))*delta

	velocity = Vector2(1,min_speed).rotated(rotation)*speed*delta * speed/deaccel * ReverseIsFalse

	_movement(delta)
	move_and_slide()
func _movement(delta):
	var Dir = Input.get_vector("TurnRight","TurnLeft","Brake","Accelerate")
	if Input.is_action_pressed("TurnRight",true) or Input.is_action_pressed("TurnLeft",true): #Only turns if turning is true
		if Dir.x > 0:
			self.rotation -= rotation_speed*delta
		else:
			self.rotation += rotation_speed*delta
	if Dir.y < 0:
		if speed <= min_speed:
			if speed <= min_speedOG:
				ReverseIsFalse = -1
			else:
				ReverseIsFalse = -1
				speed -= (deaccel**deaccel*deaccel*delta)
		else:
			ReverseIsFalse = 1
			speed -= (accel*delta)
	elif Dir.y > 0:
		ReverseIsFalse = 1
		speed += accel*delta
	#if Input.is_action_just_pressed("Boost"): #If I get around to it.
		#max_speed*=2
		#speed*=2
	#else:
		#while max_speed > max_speedOG:
			#max_speed -= delta
			#print(max_speed)
2

What goes wrong with your presented implementation?

Sticking to basics you can accelerate with the move_toward function

var accel_input := Input.get_axis("Accelerate", "Brake")
# maybe adding (accel_input+1)/2 will help to keep the car rolling without any input pressed
velocity = velocity.move_toward(speed * accel_input, accel * delta)