How to rotate character based on wall normal for a wall slide animation?

[thebrick640]

Godot Version

4

Question

I want to rotate the player based on the wall surface he touches so that I can make the character slide onto the wall.

I have a script, it’s supposed to get the wall normal and use it to change the rotation of the player so that It can rotate to the normal.

wall_norm.normal results in Invalid get index ‘normal’ (on base: ‘KinematicCollision3D’).

wall_norm = get_slide_collision(0)
		
model.rotation.y = wall_norm.normal
		

[gertkeno]

use wall_norm.get_normal()

[thebrick640]

When I change it to

wall_norm = get_slide_collision(0)
model.rotation = wall_norm.get_normal()

The character turns to it’s side and faces the right side for one side of the wall but for the other still faces the wrong way

[gertkeno]

Can you show more code or a picture? Node3D’s rotation property is in radians how much each axis rotates, a normal value being plugged into this will basically never be useful. My first thought is to use look_at with the normal as the UP direction and then make the character look the direction they are moving.

var wall_norm := get_slide_collision(0).get_normal()
var forward := velocity + global_position
model.look_at(forward, wall_norm)

[thebrick640]

	move_and_slide()
		
	if is_on_wall() and not is_on_floor():
		anim_tree.set("parameters/conditions/slidingonwall", true)
		anim_tree.set("parameters/conditions/jumping", false)
		anim_tree.set("parameters/conditions/grounded", false)
		
		var wall_norm := get_slide_collision(0).get_normal()
		var forward := velocity + global_position
		
		model.look_at(forward, wall_norm)
		
		can_walljump = true

lookat
causes the character to slide onto the wall sideways, causing only the character’s feet to be touching the wall during the animation
https://i.imgur.com/sYBmG0K.png
I’m looking for a result like this

Maybe we need to rotate the lookat so that the player faces up?

[gertkeno]

Up to how you animate. You will need to play around with look_at or find a new equation that works for your animation.

Going back to your original idea we could get an angle for just the Y axis based on the normal vector. This will look strange for walls that are slanted; rather than straight up.

var wall_norm := get_slide_collision(0).get_normal()

var y_rotation := atan2(wall_norm.y, wall_norm.x)
model.rotation.y = y_rotation

[thebrick640]

It worked, my character model is facing up with the right rotation from the wall!

[thebrick640]

How would I have velocity away from the wall now?