The original trucktown vehicle code

vehicle.gd

	if Input.is_action_pressed(&"accelerate"):
	  # Increase engine force at low speeds to make the initial acceleration faster.
		var speed := linear_velocity.length()
		if speed < 5.0 and not is_zero_approx(speed):
			engine_force = clampf(engine_force_value * 5.0 / speed, 0.0, 100.0)
		else:
			engine_force = engine_force_value

		# Apply analog throttle factor for more subtle acceleration if not fully holding down the trigger.
		engine_force *= Input.get_action_strength(&"accelerate")
	else:
		engine_force = 0.0

	# Me: easy peasy all I need to do is add a pressed action here to clamp the engine force to 0
	# and the brake to 1.0

	if Input.is_action_pressed(&"reverse"):
		# Increase engine force at low speeds to make the initial acceleration faster.
		if fwd_mps >= -1.0:
			var speed := linear_velocity.length()
			if speed < 5.0 and not is_zero_approx(speed):
				engine_force = -clampf(engine_force_value * 5.0 / speed, 0.0, 100.0)
			else:
				engine_force = -engine_force_value

			# Apply analog brake factor for more subtle braking if not fully holding down the trigger.
			engine_force *= Input.get_action_strength(&"reverse")
		else:
			brake = 0.0
	else:
		brake = 0.0