Improve teleportation parabolic ray

[RaananW]

The XR parabolic ray's distance calculation is not accurate under certain conditions. It is currently constructed from 2 points that are calculated based on the provided radius. The praabolic radius should be the max distance between the user and the end point, but it is right now the distance between the user and the first point in the air (from which another ray is sent until it hits the ground).