This is a fork of the source code for the book: "Ray Tracing From the Ground Up" by Kevin Suffern. The source code was taken from http://www.raytracegroundup.com/ and is GPL. See License.txt for details. I split the code into a static raytracer library and the UI application. This is the UI application. BUILDING PREQUISITES CodeBlocks, a free C/C++ IDE. Boost, high quality C++ libraries. The RTFGU static library, also hosted at github. Changes New UI Features: * ViewPlane takes it's width and height from the window. * Builder functions selectable from toolbar. * Sampler selected from toolbar. * Number of samples and pixel size selectable from toolbar. TODO CMake build.