NPC Flight Tilt

Unity Engine
1

Hello:

I am trying to get an AI airplane to tilt as it turns. I adapted my player code like so:

var look = target.transform.position - transform.position;
var lookRotation = Quaternion.LookRotation(look);
var dir : Vector3 = lookRotation.eulerAngles;

euler.y += dir.x * rotateRate;
euler.z = Mathf.Lerp(euler.z, -dir.x * 50, 0.2);
euler.x = Mathf.Lerp(euler.x, dir.y * 50, 0.2);

var rot : Quaternion = Quaternion.Euler(euler);
transform.rotation = Quaternion.Lerp (transform.rotation, rot, 0.25);

Yet when I run the code the airplane gives me a bunch of weird jiggling, unlike my player character. Any suggestions?

2

I’m not sure what you’re doing with the Euler angles there, but it seems unlikely that it would produce the desired results.

Is the simulation basically 2-d? That is, do the game objects always move in the same plane? Or is it a fully 3-d environment?

3

It’s 3D.

4

Just to be clear, when you say it’s 3-d, do you mean the AI actually operates in 3-d?

Clearly, the simulation is 3-d because Unity is a 3-d engine. However, you can have a 3-d game (in terms of visuals, etc.) while having AI that essentially functions in a 2-d environment. That’s what I’m asking - is the AI essentially 2-d, or is it fully 3-d? (Maybe your answer will still be the same - just making sure.)

5

The AI should move up, down, forwards, backwards, left, and right, yes.

6

In that case you definitely don’t want to be working with Euler angles for this.

As for how to get the plane to orient itself realistically as it turns, I couldn’t really say without doing some experimenting myself. (Since it’s a fully 3-d simulation, it seems what you’re probably looking for is a realistic-ish simulation of flight dynamics rather than just an ad hoc ‘rolling’ effect.)