Lisp Game Engine

Summary

This is an experiment in interactive game programming, by which I mean you can write code, create, add and remove game entities while the game is running.

The essence of the system is a data driven engine, where the main loop only updates objects (built of components). You make a game by adding objects to the engine's active components. Objects are containers holding a number of components. You can easily add your own components; the engine comes with a few that are useful such as text and animated sprites.

Requirements

Requires a Common Lisp with ASDF, CFFI, and lispbuilder-sdl, as well as the SDL runtime libraries.

Current Work

• Animated and simple sprites
• Basic 2d physics and collision
• Object and component based architecture
• Data driven engine
• (WIP) Pong example game

Future Work

• On screen REPL
• Some kind of editor; a way to get data into the game more visually
• Sound and music via lispbuilder-sdl-mixer
• Scrolling tile maps with transparency and parallax scrolling
• Simple state machines or scripted behaviour
• Flexible drawing system to allow draw order, transparency etc
• OpenGl or Cal3d support (also Open Dynamics Engine)