this post was submitted on 20 Aug 2023
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Having trouble with 3D rotations (lemmy.world)
submitted 1 year ago by [email protected] to c/[email protected]
15 comments fedilink hide all child comments
 

I'm trying to make a 3d flight controller with a more arcade feel (think Ace Combat or Rogue Squadron). I'm somewhat new to working in 3d in Godot though and I don't really understand what methods I should be using to achieve this.

I want up and down to control pitch and left and right to be something of a hybrid roll/yaw. I'm setting direction to -transform.basis.z and multiplying that by speed, but when I use rotate_x() with the pitch, the plane itself rotates, but I only move flatly across the world plane rather than climbing up or down as I'm attempting to achieve.

What am I missing here?

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[–] [email protected] 1 points 1 year ago (1 children)

Hard to tell without seeing your code and node tree, but I reckon you are probably rotating a child (specifically the mesh instance). You should be rotating the root spatial of your player scene.

[–] [email protected] 1 points 1 year ago (1 children)

That's what I assumed at first too, but I am targeting the primary node which is a character3D. The mesh is a child of that and nothing is targeting it. This is the code I'm using:

rotate_x(pitch * pitch_speed)

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

Not tested but perhaps you should be using rotate_object_local - so the rotation is in the plane’s own axis, rather than that of its parent.

[–] [email protected] 1 points 1 year ago (1 children)

I'm not sure I understand the difference in how these work. In the docs it makes it sound like the only difference between rotate_x() and rotate_object_local() is that rotate_x() specifies the rotation axis explicitly whereas rotate_object_local() takes it as an argument. Is that not the case? Sometimes the docs are confusing.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

I think you need to learn about world transforms and local transforms. My guess is you're translating along the world Z or the Z of the level instead of the local Z of the plane scene.

Different coordinates spaces: https://docs.godotengine.org/en/3.1/tutorials/math/matrices_and_transforms.html