Quaternion.AngleAxis() is alway using the axis at 0, 0, 0

Question

I want to calculate different points around a object. To do this i'm using Quaternion.AngleAxis(). But the points always gets calculated around 0, 0, 0 as you see in the picture below. Here is the code:

 for (int i = 0; i < numberOfRays; i++)
         {
             Quaternion rotation = this.transform.rotation;
             Quaternion rotationMod = Quaternion.AngleAxis((i / ((float)numberOfRays - 1)) * angle * 2 - angle, this.transform.forward);
             Vector3 dir = rotation * rotationMod * Vector3.right;
             rayDirections[i] = dir;
 
             //Instantiate(emptyGameObject, rayDirections[i], Quaternion.identity);
         }

And here the picture what is happening (visualized with empty gameObjects):

alt text

So the black guy is the gameObject the points should be around. Hope somebody can help me. Maybe i don't understand Quaternion.AngleAxis() right. I'm by the way using sprites of Archvale as placeholder sprites. So defenetly go and check IDoZ Devlogs out: https://www.youtube.com/watch?v=hDxxKNS55Cg&list=PLokUXxE68Y2nQ5ufDEnEi4fqgSqY1mrxX

Answer 1

Answer by jackmw94 · Feb 05, 2021 at 10:29 AM

I think you're creating the rotated offsets alright, you just need the positions to be local to the player. So if this is a child of your player then you want to be setting their local positions:

 var newObj = Instantiate(emptyGameObject, Vector3.zero, Quaternion.identity);
 newObj.transform.localPosition = rayDirections[i];

Or if they are separate to the player then they'll need a reference to his position in order to place themselves around him:

 rayDirections[i] = dir + player.transform.position;

With player being a reference to your player gameobject or a component on your player.

Let me know how you get on with this or if I've misunderstood something :)

Add comment · Share

Quaternion.AngleAxis() is alway using the axis at 0, 0, 0

1 Reply

Your answer

Follow this Question

Related Questions