How does lerp work?

Question

I have been trying to get the player to move to x point without input from the player. I have tried many things but settled on just the lerp function. but run into a few issues with it so far. I have sort of got it to start working but it will not go up on the y axis.

        direction.y = lerp(global_position[1], hook_position[1], 0.009)
        direction.x = lerp(global_position[0], hook_position[0], 0.009)

I have already made sure that I effectively turn off the gravity in the scene, I also have checked to make sure that the positions for both global_position and hook_position are valid.
(note this is all in 2d)
Thanks for any help you can provide!

Comments

One option that you might or might not have tried already is to use a tween for this.

You could add this to your player node:

var tween

func _ready():
    tween = Tween.new()
    add_child(tween)

and then when you want to move automatically (over a duration of, say, 1.5 seconds) you can run this on the player node

tween.interpolate_property(self, "global_position", global_position, hook_position, 1.5)
tween.start()

The syntax for the interpolate_property function is:

(Node with property you want to lerp, Name of property you want to lerp, Initial value, Final value, Duration)

Also, it's not exactly a lerp, since it eases in and eases out to make the motion not be jerky at the start and finish.