koobas.hobune.stream
Rotate sphere, so that any fixed point on the sphere points at the camera.
Hello all!
My question is as follows, I have a sphere (earth), and I want to rotate it so that any fixed point of my choice on the sphere points directly at the camera.
Best Answer
If you are able to get the exact point in space of the sphere that you want to look at the camera, I think this should work
Vector3 toPoint = (spherePoint - sphere.transform.position);
Vector3 toCamera = (camera.transform.position - sphere.transform.position);
Quaternion rotateBy = Quaternion.FromToRotation(toPoint, toCamera);
sphere.transform.rotation = rotateBy * sphere.transform.rotation;
Thanks for the reply, that method works great on some points, but not all points.
Would you happen to have an alternative way? or any reference I can follow?
Quaternion math is tricky since it's not communicative. I just tested it out and on the last line, you just have to multiply in the opposite order. So it should be sphere.transform.rotation = rotateBy * sphere.transform.rotation;
