3D Intersection - Ray-Sphere

[npruehs]

Implement a ray-sphere intersection test with the following signature:

public static bool Intersects(this Ray3F ray, SphereF sphere)

Call that method from

public static bool Intersects(this SphereF sphere, Ray3F ray)

If you can, provide an overload with an out parameter containing the intersection point(s).

Write at least one unit test illustrating your solution, and/or add any reference links as comments.