i believe its just to comply with tax laws in different countries. europe recently changed to pay-at-origin-of-buyer rather than seller, for example, so they need to know where you are to figure out where to send the sales tax.
Recent community posts
Crongdor's Steam release is tomorrow! I'll add keys to Itch.io as soon as they become available. There will also be a v1.4 update, which includes a number of fixes, binaries of the map editor, and custom map launcher for maps made using the editor.
Thanks everyone for voting on the Steam Greenlight page! It got Greenlit, and I'm working on integration with the Steam API and doing some bug fixes and improvements for v1.3. There seems to be some interest in dissecting the game and doing some insight/tutorial videos or written bits so I'll be looking at that next! I'll make sure that I can get Steam keys for itch.io customers.
My friend Andrea set up a facebook page over here: https://www.facebook.com/AntonsOpenGL/. I believe it's mostly just a traffic director as it gets a few hits but not comments! I haven't looked at Vulkan yet. I want to see how it catches on across different operating systems and if there's interest in the indie/student area first. I think my next project will be dissecting my video game with some videos/tutorial type stuff as there seems to be plenty of interest there. I'm just finishing the Steam build at the moment. Good luck.
the only on-line reader browser app is Amazon's cloud service - perhaps i misworded something on my website? i would like to have a PDF but i don't at the moment.
short story: it's too much work to get it to format to the same standard.
long story: i painted myself into a corner a little. the book started as a little experiment with self-publishing on amazon and i never expected it to be so popular! the original is in a [not very pleasant] subset of HTML that amazon's kindlegen tool required in an early version (this is also why there are no properly-formatted tables). it was not too much trouble to convert that to a nice epub and mobi, but of the pdf conversion tools i've tried the formatting of layout things like margins and table of contents is not to a high enough standard and/or it takes too long. i had a foray into making a tool that would reformat all the HTML into the equivalent LaTeX but it also ended up taking too long to justify [pun intended]. certainly, it's possible to use something like Calibre to convert the epub to a pdf if you like, but you'll see it's not quite formatted well enough for me to upload as a finished product! i'll take any suggestions for a better/quicker conversion pipeline that people can throw at me!
will redo the bit about shader parallelism at some stage - it's trying to be too specific in relating # of parallel shader executions to # of uniform shader cores. should be a looser relationship - reported # of shader 'cores' are massively over-inflated by manufacturers
I uploaded ed 5, fixing errors in angle calculations in the Spotlights chapter, and various typos. Please let me know if there has been a mistake in the builds and I shall build them again!