2.5d Engine / Dungeon crawler (clone of notch's Prelude of the Chambered (https://www.youtube.com/watch?v=rhN35bGvM8c)) in Common Lisp

This is an attempt to redo the above mentioned game in Common Lisp. To get things running you will need

• sdl2kit
• png-read
• static-vectors

Best is, pull and compile them via quicklisp.

For now following things are working:

• rendering of floor and ceiling
• texture mapping of floor and ceiling with the same texture
• shading
• keyboard / mouse handling

The intention was to experiment with writing a game and beeing able to change things more interactively than notch himself is doing in the video. Once you have the programm running you can e.g. :

• change the width and height -> resulting in a better or worse looking quality which has of course high impact on the performance
• load different textures
• change the behaviour of rendering or post processing (shading in general)
• swith of post processing completely All these things and more you can do on the fly while the program is running. You could achieve this with using Emacs + Slime. The code uses a resolution of 160x120 pixels (global parameters width and height) and scales up to whatever resolution you want (global parameters window-with and window-height).

The code is tested under Ubuntu 14.04, 64bit + SBCL in a VM (~25 fps), and Mac OSX Yosemit,64bit + CCL (~35 fps) and ECL (<10 fps).

Please note, everything is done on a per pixel basis with the cpu, the gpu is only used for scaling and blitting the resulting picture to the screen.