Any book on computer graphics would be a good start for the graphics side.

I like 3D Computer Graphics by Alan Watt as an introduction and overview http://www.amazon.co.uk/3D-Computer-Graphics-Alan-Watt/dp/02...

and Real-time Rendering for more advanced subjects http://www.amazon.co.uk/Real-time-Rendering-Tomas-Akenine-Mo...

The session from Assembly 'The Basics of Demo Programming' is online and may also be useful http://www.youtube.com/watch?v=TbcZyAO6K7c or have a look at The Demo Effects Collection http://demo-effects.sourceforge.net/

But it depends what platform you want to use C-64 An Introduction to Programming C-64 Demos http://www.antimon.org/code/Linus/ and http://codebase64.org/doku.php

Processing http://www.processing.org/

WebGL Browserscene: Creating demos on the Web http://www.youtube.com/watch?v=XZLqwXdXjqY

Deconstructing a browserscene demo http://www.youtube.com/watch?v=pOjWOA-iPnA

I have some more bookmarks on pinboard http://pinboard.in/u:z303/t:demoscene/

I'm reading this (http://www.amazon.com/68000-assembly-language-programming-Ge...), and messing about with it on EASy68k: http://www.easy68k.com.

I'm using that book because it seems to be a gentle start into assembly language. If you read a lot of tutorials, they want you to memorise how the architecture works before getting started, which seems to be to be a very exhausting approach that's not well suited to people who have other things going on in life.

Once I have the basics I'm going to gradually build up a libray of sharp patterns. I expect I can build a capability from this approach. Maths operations, then user input, then event loop, then moving bitmaps around screen, then very basic wave forms. 3d graphics are a fair way down the line.

I'm very curious about this as well. I was always impressed by the demos I found but never managed to find anything that showed me how to break into the community. About the only thing I gathered was it was not so common in the US.