Look at wall with normal? ( Godot 4 )

[creepersaur]

Godot Version

4.2.1

Question

Context: I have a 3d first person parkour game and have implemented wallrunning and wall climbing.

The issue is that you can still move the camera after starting the wallrun/climb. It would be better to fix the camera a bit to the direction you’re going in.

I want to make the Camera face towards a wall when climbing it. And fix the camera rotation to face the side of the wall respective to the normal when wallrunning.

Currently, for the wall climbing, I use look_at_from_position(Vector3.ZERO, climb_normal) and use the normal of the wall. However, getting the rotation on the Y axis doesn’t really seem to work.

It will usually not work though, and instead turns to the right/left of the wall. Adding/subtracting 90 degrees doesn’t work either because each wall has a different direction.

TL;DR

How do I get the look_at Y axis rotation and set the camera’s global_rotation.y to it?

[pennyloafers]

If the camera is pitched up or down rotation y will not do what you want.

One way to go about this is add a camera arm and swivel hat is top level and has a remote transform telling it where to be positioned but not rotated. Then the camera can be a child of the arm/swivel and look at whatever, but if you need to rotate the camera, just rotate the parent y only.

There are more complicated maths ways to do it, but I find that adding arm and swivel nodes easier to manipulate.

[creepersaur]

I have done that, but even so it wont really work the way I want it to.

I have this hierarchy:

> Player
    - PivotX : Node3D
       - PivotY : Node3D
          - Camera3D

[pennyloafers]

K

@creepersaur

look_at_from_position

This function uses global coordinates, so using vector3.zero is not a good idea.

It should be camera.look_at_from_position(camera.globabl&position+wall.normal * distance, player.global_position)

[creepersaur]

Thanks, I got the answer.
Basically, you pass the normal to the function and use the PivotX variable where the PivotX is the same on from the hierarchy above.

func get_wallrun_rotation(_normal):
	var old_rot = PivotX.rotation
	PivotX.look_at(PivotX.global_position - _normal)
	var new_rot = PivotX.rotation.y
	PivotX.rotation = old_rot
	
	return new_rot

(Where new_rot is the Y axis rotation.)