Update README

README.md

@@ -2,73 +2,54 @@ Example code from the [OpenGL 4.0 Shading Language Cookbook][cookbook]
 =========================================================
 
 This is the example programs from the [OpenGL 4.0 Shading Language
-Cookbook][cookbook], by David Wolff.  The source code has been updated to work
-with MS Visual Studio, and no longer requires Qt.
+Cookbook][cookbook], by David Wolff.  The source code has been updated to 
+use GLFW, and no longer requires Qt.
 
 Requirements
 -------------
 To use these examples, you'll need the following:
 
-* The latest version of the Unofficial OpenGL Software Development Kit (GLSDK), 
-  available at <http://glsdk.sourceforge.net>.
-* You'll also need the clever and useful tool [premake][].
-* In order to use the examples in Chapter 8, you'll need at least version 
-  0.9.3 of [GLM][].  Unfortunately, at this time, the
-  [GLSDK][] includes version 0.9.2.x of [GLM][].  However, it is easy to 
-  substitute a newer version (see below).
+* The [GLM Mathematics Library][GLM].
+* A recent version of the [GLFW][] library.
 
 Compiling the examples
 ----------------------
-These examples have been fully tested with Visual Studio 2010.  I hope to have
-them working with other compilers soon.  Your help is welcome!  Fork 
+All recipes have been tested on Linux.  I hope to have
+them working on Windows (using MinGW) soon.  Your help is welcome!  Fork 
 [this project][ghcookbook] on github.
 
-1.  Install the [GLSDK][] by following the instructions on their [web site][glsdk].
-    In the process, you'll also install [premake][].
-2.  If you want to use the examples in Chapter 8, install the latest version
-    of [GLM][] into the GLSDK.  You can do so by removing the `glm` directory
-    and replacing it with the contents of the GLM zip file.  Make sure to change
-    the directory name to just `glm`.
-3.  Download the example code from [github][ghcookbook].  Unzip to an appropriate
-    directory.
-4.  Edit the `premake4.lua` file to point to your GLSDK's `links.lua` file.
-5.  Run `premake4 vs2010` to generate the project and solution files.
-6.  Open the solution in Visual Studio, and compile!
+1.  Install [GLFW][] by following the instructions on their [web site][GLFW].
+2.  Install the latest version of [GLM][].
+3.  Download the example code from [github][ghcookbook], or clone using git.
+4.  Edit the `Makefile` to point to your GLFW and GLM installations.
+5.  Compile by running `make`.
 
 Any problems, create an issue on [github][ghcookbook].
 
 Changes from the book
 ------------------------
-At the time the book was written, I thought that using Qt would make the examples
-quite portable and easy to compile within Qt Creator.  Unfortunately, Qt Creator
-has changed since the time of the writing of the book.  It has become more 
-unwieldy to install, and in my experience has become extremely slow to boot.
-In addition, it is not widely used.
+I've dropped Qt and moved to [GLFW][] in order to make the code more easily
+portable.  I've also moved over to gnu make.
 
-Secondly, since the time of the book's writing, I have experienced problems
-with GLEW under a 4.0 core profile.  When doing some research it appears that
-there are some fundemental issues with GLEW and core profiles.  
+Since the time of the book's writing, I have experienced problems
+with GLEW under a 4.x core profile.  When doing some research it appears that
+there are some fundemental issues with GLEW and core profiles.  Therefore,
+I've dropped the dependence on GLEW, and I'm using a pre-packaged header and
+loader that was created using [the OpenGL Loader Generator][GLLoadGen].
 
-Due to the above issues, and to make the code more available and hopefully 
-easier to use, I have ported the code over
-to use GLLoad and FreeGLUT via the GLSDK.  The code has been fully tested and 
-compiles in VisualStudio 2010, and will soon (hopefully) be tested with the 
-GNU compiler chain under Linux.
+The code has been fully tested with OpenGL 4.3 and 
+compiles under Linux with the latest NVIDIA drivers, and will soon (hopefully) 
+be tested with MinGW on Windows. 
 
 The major changes are listed below:
 
 * Dropped dependence on Qt.
-* Uses FreeGLUT, GLM, GLLoad, and GLImage via the [GLSDK][].
+* Uses [GLFW][], [GLM][], and [GLLoadGen][](optional).
 * Dropped dependence on libnoise for Chapter 8 examples.  Instead, uses the noise
   functions available in [GLM][] > 0.9.3.
 
-TODO
---------------
-* Currently, the noise examples (Chapter 8) don't look quite right due to the move
-  to GLM.  Fix noise examples (chapter 8) to look better.
-
 [GLM]: http://glm.g-truc.net
-[GLSDK]:  http://glsdk.sourceforge.net
-[premake]:  http://industriousone.com/premake
+[GLFW]:  http://glfw.org
 [ghcookbook]:  http://github.com/daw42/glslcookbook
 [cookbook]: http://www.packtpub.com/opengl-4-0-shading-language-cookbook/book
+[GLLoadGen]:  https://bitbucket.org/alfonse/glloadgen/wiki/Home