Best method for slow acceleration

Help Programming
1

Godot Version

4.2.2.stable

Question

So im making my player movement, and essentialy it snaps from walking_speed to sprint_speed. Lerping it makes it feel fast anyway.

I want to make velocity build up, not go from 0 to 1 in half a second.

	if Input.is_action_pressed("sprint") and Input.is_action_pressed("forward") and is_on_floor():

		if is_crouching:
			current_speed =lerp(current_speed, crouchrun_speed, 1) 
			is_running = true
			is_walking = false
		else:
			is_running = true
			is_walking = false
			current_speed = lerp(current_speed, sprint_speed, 1) 
	elif is_crouching: current_speed = crouch_speed
	is_running = false
	is_walking = true

If sprint, forward and on floor, current speed from walk to sprint speed.
(i am very new btw and havent found a solution online)

2

You not used lerp properly, do like this:

var lerp_speed = 10.0 #or 7.0
current_speed = lerpf(current_speed, target_speed, delta*lerp_speed)

And do not just put the value directly.