In 1993 the Future Crew released the seminal demo “Second Reality”. One of the more simple effects they showed in this demo was the “Dot Tunnel”. It is a simple, yet mesmerizing oldskool demo effect. We can build on our knowledge of fixed point maths to implement this effect and maybe even improve on the original!

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Music: A Little Wonder by Spino2006

Source code: https://github.com/root42/dostunnl

0:00 Introduction 1:20 The Code Stub 3:15 Lissajous 8:40 Precomputed Tunnel 16:20 Drawing The Tunnel 24:12 THE DEMO 26:00 Closing words

#demoscene #letscode #msdos #retrocomputing #programming