Added a new index

[mashinsp]

What does this PR do?

Add resource(s) | Remove resource(s) | Add info | Improve repo

For resources

Description

Why is this valuable (or not)?

How do we know it's really free?

For book lists, is it a book? For course lists, is it a course? etc.

Checklist:

• [x] Read our contributing guidelines.
• [x] Search for duplicates.
• [x] Include author(s) and platform where appropriate.
• [x] Put lists in alphabetical order, correct spacing.
• [x] Add needed indications (PDF, access notes, under construction).
• [x] Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[mashinsp]

I guess rather than "Virtual Reality", "Extended Reality" Might be better because it covers all the aspects of "Augmented Reality", "Virtual Reality" and "Mixed Reality".

On Sun, Jan 15, 2023 at 1:14 AM Eric Hellman @.***> wrote:

@.**** commented on this pull request.

In books/free-programming-books-subjects.md https://github.com/EbookFoundation/free-programming-books/pull/9263#discussion_r1070403134 :

@@ -916,6 +917,13 @@ Kerridge (PDF) (email address requested, not required)

• Version Control with Subversion - Ben Collins-Sussman, Brian W. Fitzpatrick, C. Michael Pilato

+### Virtual Reality

+* AUGMENTED REALITY - José María Ariso (Ed.)

+* VIRTUAL REALITY - Steven M. LaValle

should use this url: http://lavalle.pl/vr/ We don't use ALL CAPS titles. I'm wondering why use "virtual reality" for "augmented reality" and "exgended reality". Might these be better under "graphics programming" or "game development? The is a virtual worlds book in Game development. Be sure to check the free-programming-books-lint output for linter errors. Alphabetical order and spacing are the most common problems.

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[PaulTitto]

i think you should sort from alphabet.

[eshellman]

Thanks for persevering with this. Welcome to free-programming-books!