How to calculate the angle between a point and another point with a quaternion?

Question

Geometry

Good afternoon!
I would be very grateful if someone could help me solve the following problem -
I have a sphere in 3D space. Its position is x1, y1, z1. There is a camera with a position x2, y2, z2 and a quaternion for the camera xq, yq, zq, wq. It is necessary to determine at what angle it is necessary to rotate the camera relative to the X, Y, Z planes where the sphere is located so that the camera points directly at the sphere.
Thanks

Answer 1

The easiest way to rotate the camera to a point is to use Transform.LookAt . If you just need to know the rotation, then you can use Quaternion.FromToRotation .