As modern GPUs and graphics APIs have transitioned from the so-called "fixed function pipeline" to the "programmable pipeline" it has become more and more complex to get started with graphics programming.
On top of the operating system dependent code that needs to be written to provide a main routine, create windows and then render contexts, graphics API specific CPU-side code to load resources, data and geometry, probe extensions and then specify and dispatch clear, draw and compute calls, now one has to also author, load, compile, upload and debug shader programs to be executed on the GPU itself to control the actions taken by a modern graphics processor in composing images and processing data...
All this requires an enormous amount of knowledge to get even a minimal, modern graphics program up and running, and provides a significant barrier for newcomers to get started in the field.
But also to the seasoned graphics professional, wanting to quickly sketch out an idea for a new lighting calculation or procedural shading method, the industry-standard, multi-gigabyte engine framework, built around all the requirements of a AAA game studio, might be more of a hurdle to spontaneous creativity and inspiration than a helpful blessing.
It can provide short iteration times from idea to prototype, with quick evaluation, background re-compilation and display.
It can be a learning and teaching tool for absolute beginners to practice "playful, interactive exploration" in real-time, without having to study years and years of API and programming language cruft first, just to get to that first, shaded triangle on screen (or more likely, quit at the infamous, inexplicable "black screen").
When we started working on KodeLife in 2010 (then called "codelife"), there were a handful of tools aimed at graphics professionals, providing deep and complex feature sets, but nothing that fulfilled our desire for that quick rush of "launch, type, view".
Most of these tools have now sadly ceased to be, and while KodeLife can not yet provide the same deep feature set, we have plans to re-create some of that depth, and will continue to listen to all feature requests and needs, and will expand on KodeLife's features in the many years to come.
Furthermore, as live-coding has become much more "en vogue" in recent years, many new tools have been developed to scratch that itch for quick and dirty live shader coding.
We welcome this development, but will continue our efforts, as we feel there is a need for a deeper feature set for the professional than most of these younger tools provide, and to deliver a different platform for beginners to get started on and grow, in addition to mostly web-based, multi-level abstractions and tools targeting the simplest, easiest and smallest common denominator.