Dielectric Material giving black ring inside the sphere

[Shivraj1906]

I am following the book and writing the code in Java. Everything worked fine until I implemented the Dielectric material.
It is giving the black ring inside the sphere.

I guess the problem is with how I am calculating the normals. But I can't figure it out.

Link to my repo:
https://github.com/Shivraj1906/raytracer.git

[code-monkey-101]

The hollow glass sphere should have a radius of -0.4, not -0.5. Also, you are missing the outer layer of the sphere (the second sphere at -1, 0, -1).

[code-monkey-101]

Interestingly, you are not the only one with this exact problem. Wondering if there is a buggy version of the book somewhere.

See also #513

[Shivraj1906]

That minus radius was just typo there, even after that it is giving the black ring. I will try to debug the code.

Thanks for your help.

[code-monkey-101]

You forgot to copy frontFace in your HitableList.hit method

[Shivraj1906]

Thanks mate, a lesson to be learned here.