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Having trouble with 3D rotations (lemmy.world)

submitted 1 year ago by MossBear@lemmy.world to c/godot@programming.dev

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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[–] jwlgowi@lemmy.sdf.org 3 points 1 year ago* (last edited 1 year ago) (8 children)

(Not op, just an example)

I don’t know an optimal answer here. I see various discussions online about flight control variants. However, here is a simple example I set up out of curiosity. Maybe useful? I’d like to hear about what you end up with.

Project code at: https://github.com/pipehat/godot41_flight_controller_example

————————————

plane controller script:


extends CharacterBody3D

var print_delay = 1
var next_print = 0
const SPEED_MPS = 500

func _physics_process(delta):
	var input_dir = Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")
	
	if next_print &lt;= 0:
		print(input_dir)
		print("-z: ", -transform.basis.z)
		next_print = print_delay
	else:
		next_print -= delta
	
	var roll = -input_dir[0]
	var pitch = input_dir[1]
	
	rotate(transform.basis.z, roll * delta)
	rotate(transform.basis.x, pitch  * delta)

	velocity = -transform.basis.z * SPEED_MPS * delta
	move_and_slide()

[–] jwlgowi@lemmy.sdf.org 2 points 1 year ago (1 children)

Not shown in the code here for simplicity, but in the project I added a little bit of yaw drift when banking.

I’m sure there’s a more accurate way to simulate all this. Just messin around.

[–] jwlgowi@lemmy.sdf.org 2 points 1 year ago

Now for no good reason I added flaps that rotate with the controls. Definitely feature creepin. I’m out! Good luck op!

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