Scheme-Uk-Fluxus

Fluxus: Scheme Livecoding
Dave Griffiths

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Overview

• Fluxus introduction • What it's built from • Why Scheme • Livecoding • How it works - some examples • Functional Reactive Programming •Gamepad Livecoding

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What is fluxus?
• Framework for various things: Playing/learning about graphics Workshops Performances Art installations • Game engine at heart... • With a livecodingeditor • Uses PLT Scheme • Source released under GPL • 4 or 5 developers working on it • Builds on Linux and sometimes OSX

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Quick demo

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I use fluxus for...

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Live coding graphics,using live audio input

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Live coding graphics and audio at the same time
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As a framework for developing new livecoding languages

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slub

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What's inside?

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BoringFeature List
• Immediate mode drawing • Scenegraph • Primitives Polys Particles NURBS patches Blobbies (implicit surfaces) Pixels (procedural texture access) • Unified access to primitive data (vertexarrays, texture data) • More advanced stuff GLSL Hardware shading ODE physics Shadows Skinning/Skeletons • Audio synthesis
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Architecture

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DrScheme integration

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DrSchemeintegration

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DrScheme integration
• Much better editor • Debugger • Profiler • Syntax highlighting • Less control over OpenGL No GLSL shader support No stencilmap shadows Slower • Not suitable forlivecoding performance

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Why Scheme?

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Fluxus philosophy

• 'Creative' code in Scheme • OpenGL grunt work in C++

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Scheme for creative code
• Fast feedback (use an interpreter)• Expressive power • Few keypresses needed to get interesting results Functional roots Use of macros to shape the language Dynamic typing • Lots of interesting research going on with Scheme

18Livecoding

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Livecoding

• Performance programming • Mainly a musical field • Reaction against the normal laptop performance • Showing the audience what you're doing

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TOPLAP

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