I received email message from Informit and my “OpenGL Programming Guide 8th edition” ebook was now available for download after I preordered that. That book gives some tutorial about GLSL programming. I tried to access www.opengl-redbook.com to get source code example download but just got blank page with a error message said that:
We’ve encountered some technical problems with the site’s content. We’re working to resovle the problem as fast as we can. Please check back soon.
A few weeks ago, I tried to access that website but this problem is never fixed for many weeks. What’s up?