Computer Software
Legalese: I am not responsible for any damage these downloads cause, etc.
I cannot ensure they will perform on all systems as they do on mine. However, I have used
these programs with no problems. If you have any comments,
suggestions, bugs, or want source code, email me.
Click on pics to see larger images where available
Graphics Demos
One of my best sections - many computer generated images and realtime graphics ideas. Programs are written in C/C++, and some assembly when needed. Some rendering in OpenGL, DirectX, and some are custom.
Mandelbrot Pixel Shader I
Dec 2006
Out of curiousity I wrote a Mandelbrot pixel shader in OpenGL GLSL. It took an afternoon, and was my first attempt at pixel shaders. The result is a spinning cube, with each face showing a zooming in and out mandelbrot set, with randomized palettes to make all the coloring look nice.
This requires shader model 3.0 or higher, so should run on all modern (year 2006?) cards. Mine is an NVidia 7800.
The code is not very clean - I hacked it together quickly to learn how subdivision surfaces.
Controls: left mouse button to orient the cube, and right mouse buttons to spin the cube.
Click the image for a larger version.
This requires shader model 3.0 or higher, so should run on all modern (year 2006?) cards. Mine is an NVidia 7800.
The code is not very clean - I hacked it together quickly to learn how subdivision surfaces.
Controls: left mouse button to orient the cube, and right mouse buttons to spin the cube.
Click the image for a larger version.
TRS-80 Color Computer Retro
July 2006
My first computer was a TRS-80 Color Computer, circa 1980. I recently decided to program some
assembly on it to see what I can do compared to what I could do as a child. This simple mandelbrot renderer is
the result. The version I wrote as a child/teen took 10-20 hours per image (on a 0.8MHZ 8-bit computer using
BASIC). This version has much higher precision, and takes under 10 minutes per image, and is not optimized
much at all.
Click to see the page describing it and to get the source code (among other things)
Click to see the page describing it and to get the source code (among other things)
Subdivision Surfaces I
2006
Out of curiousity I wrote a Loop based subdivision renderer in OpenGL. It took a few days, and is just a simple scheme, although I plan to implement a much more advanced version, including creases, boundaries, correct corners (ala Zorin), normal interpolation (Zorin again), textures, color interpolation, collision detection, as well as attempt to derive some new rules of my own to obtain some shapes not in the literature such as cones, and sharp point corners. I might also implement other types such as Catmull-Clark, butterfly, etc., but I think loop is most useful for my needs. The goal is to make as fast of an accurate software subdivision surface renderer, and use it as a base for an article on using subdivision surfaces in production tools like games and CAD systems.
The code is not very clean - I hacked it together quickly to learn subdivision surfaces.
Click the image for a larger version.
The code is not very clean - I hacked it together quickly to learn subdivision surfaces.
Click the image for a larger version.
Spinning Plasma Cubes
2002?
An image of spinning plasma cubes, with crazy colors. Prepare to be lobotomized.
Font Outline Demo
2002?
A GDI+ demo of font outline stuff, mimicking an old screen saver I had made for DOS once upon a time.
Knot demo
2001?
A program I am very proud of. It makes animated (p,q)-torus knots, and is
interactive. I made a screen saver out of it, with many more knot types and colors, found under the screen savers section.
Warp Rings
2000
This is a warping series of colored rings, like a circular sinus effect. It uses transparency and
some neat morphing effects.
Hilbert Curve
2000
Here is a Win32 app to
generate a Hilbert Curve. Source is available.
Jello Cube
2000?
This is an OpenGL rendered cube made of jello. It is done by making a cube out of many smaller cubes,
and making them "wobble." Rocket science.
Plasma
1998?
This is a pseudo-traditional plasma demo showing nice animated layering effects. If you are familiar
with the standard plasma effect from the demoscene, you will like this version. There are three sets of
concentric circles, warped as they wobble, and then XOR'ed in bitplanes to get the nice coloring.
Screen Savers
Mandelbrot screen saver, 3D polyhedral screen savers, fire images, etc. To install screen savers, look on your drive for other *.scr files (usually in Windows\system32), and copy these to that directory.
Lego Screensaver
March 2008
This is a screensave that assembles and disassembled many Lego models. Renaming the *.SCR to an EXE allows you to add your own LDRAW models to the mix.
Included is C# sourcecode and a VS 2008 project to compile the code. This is my first C# program, and was done to immerse myself in C# to learn how much I like it compared to my standard C/C++.
Click the image to see a larger version of an assembled Technic set from the screensaver.
Included is C# sourcecode and a VS 2008 project to compile the code. This is my first C# program, and was done to immerse myself in C# to learn how much I like it compared to my standard C/C++.
Click the image to see a larger version of an assembled Technic set from the screensaver.
Animated Mandelbrot Sets
Nov 2004
This is an animated screensaver consisting of hundreds of wiggling, moving Mandelbrot sets. You need to unzip the two files (scr and dat) into the directory where your other screensavers are. Contact me with comments or bugs.
Money ScreenSaver
2004
A 3D animated US currency screen saver. Designed to test currency laws when used for art. It supports selecting which denominations to show, from the penny through the $100,000 bill, as well as supporting many other options
Knot Screen Saver
2003
This is a 3D animated collection of knots, with many user settings. It is one of the prettiest screen savers I have written, making beautiful animated images. See the additional page for more. OpenGL fun fun fun!
Stringart Screen Saver
2003
Here is a 3D, antialiased string art screen saver that I wrote to test line rendering
quality for different algorithms (Wu, Bresenham, Run-slice, Nelson, many more). It uses a very high quality anti-alaised, gamma corrected line algorithm to draw lines.
Metaballs Screen Saver
2001
Here is one of my best: a realtime metaballs screensaver with many options and styles!
It requires DirectX8 or higher, e.g., will run natively on WinXP, WinME, and up. It has many color themes and rendering options, including background starfields, cube maps, and user definable image selection. Look at the page for more!
Mandelbrot Mosaic
2000
A nice mandelbrot screen saver, using SSE on P3 chips, allows making of
tiled images for webpages, etc. Be sure to click on the about box a few times.
Polyhedra Screensaver
1999
This is an OpenGL polyhedra rendering screen saver with over 500 shapes. It includes all Johnson solids, polyhedra, and many, many more polyhedra I have collected over the years.
Rubik's Cube Screen saver
1996?
A Rubik's Cube Screen Saver - allows setting the number of cubes, cube size and colors, and
creates many, many patterns along with a general randomization and solving algorithm. I hope to take some time one day and update the rendering to OpenGL for more effects like lighting, bumpmapping, etc.
Flame screen saver
1996?
A simple flame screen saver. It changes colors and shapes as it wanders around the screen. It is pretty :)
Polydot Screen Saver
1995?
This screen saver morphs collections of dots between moving, 3D shapes, including a few funny ones. Old school!
Bouncing lines, circles, boxes...
500 B.C.
An old bouncing line, ellipse, and rectangle
screen saver I wrote for Win3.1, but it runs under NT/95/98/ME/XP and up.
Lomont's C# Pac-Man Emulator (In Progress)
Oct 2008
This is a Pac-Man emulator I am working on in C# and WPF to learn them better. I am pulled off it a while, but I am posting some documentation on the hardware I compiled and corrected from the internet. Also posted is a decent (but unfinished) disassembly of the original Z80 code I did using IDAPro. Enjoy.
Lomont's Vista capable FMTracker
Oct 2008
This is newer version of the old DOS FMTracker below. This one runs in Vista and XP, using OPL2 emulation avoiding the need for the old chipsets. C++, source and some old songs included.
Lomont's Lemmings MegaClone
August 2007
This is a Lemmings clone that uses the data from the original Lemmings to run. See the associated page for details, larger images, and general goodness.
Lomont's Ataxx Game
May 2007
This is an implementation of Ataxx, a popular board game similar to Othello. Ataxx is the name of the arcade variant by Leland in 1991.
My version is very strong, with user selectable opponents.
To run, unzip the file, and place the exe and two image files in the same place. Run the exe to play.
May require DLL files from Microsoft, since it was built with Visual Studio 2005.
My version is very strong, with user selectable opponents.
To run, unzip the file, and place the exe and two image files in the same place. Run the exe to play.
May require DLL files from Microsoft, since it was built with Visual Studio 2005.
Lomont's Game Of Life Explorer
Mar 2007
This program is an implementation of HashLife, an algorithm for running Conway's Game of Life quickly and on large Universes. Although not as fast as Golly, it offers another implementation, and a nicer start to an interface. Click the picture for a bigger image.
Also, this program comes with 4000+ patterns collected from around the web.
May require DLL files from Microsoft, since it was built with Visual Studio 2005.
Also, this program comes with 4000+ patterns collected from around the web.
May require DLL files from Microsoft, since it was built with Visual Studio 2005.
Lomont's Four 4's Solver
Mar 2007
This program solves four 4's problem, which is to write various positive positive integers using exactly four 4's, and various sets of operators. For example, 12 = 4*(4-4/4), 10 = sqrt(4)*4 + 4/sqrt(4), etc. Output is a CSV file easily viewed in Excel. Output is in Postfix (Reverse Polish Notation).
Run 44.exe -h to get command line parameters, which set the depth of the search, operations allowed, etc.
Also to the right is an excel CSV file with all combinations up to 10,000, using a large set of operators, and up to depth 14. The first several smallest integers not on the list are: 2087 2189 2237 2263 2453 2753 2777 2779 2827.
May require DLL files from Microsoft, since it was built with Visual Studio 2005.
Run 44.exe -h to get command line parameters, which set the depth of the search, operations allowed, etc.
Also to the right is an excel CSV file with all combinations up to 10,000, using a large set of operators, and up to depth 14. The first several smallest integers not on the list are: 2087 2189 2237 2263 2453 2753 2777 2779 2827.
May require DLL files from Microsoft, since it was built with Visual Studio 2005.
Lomont's Zombie Infection Simulation
Mar 2006
This program complete with sourcecode (.NET 1.1, Visual Studio 2.3) allows easy creation of external DLLs implementing brains for the popular Zombie Infection Simulation. I designed (on my own time!) it for a developer training session where I work, and employees tried their hand at making himan brains that try to resist the onslaught of the zombie horde.
Download, expand, and run the file zombie.exe to watch the simulation. Press '?' for a list of keyboard commands.
Unfortunately there is a bug or two in this code which I don't have time to fix at the moment, and it crashes if you resize the playing field. Sorry :)
Download, expand, and run the file zombie.exe to watch the simulation. Press '?' for a list of keyboard commands.
Unfortunately there is a bug or two in this code which I don't have time to fix at the moment, and it crashes if you resize the playing field. Sorry :)
Lomont's Tic Tac Toe tester
Mar 2006
This program complete with sourcecode (.NET 1.1, Visual Studio 2.3) allows easy creation of external DLLs implementing tic tac toe brains. I designed (on my own time!) it for a developer training session where I work, and employees tried their hand at making unbeatable tic tac toe programs. Several made it. Also included is a brain that is optimal against an idiot (idiot makes random legal moves), which wins 96% against the idiot brain.
Download and run the file tttg.exe to play with this.
Download and run the file tttg.exe to play with this.
Lomont's Sudoku Program
Oct 2005
This is a beta version of a Sudoku solver/generator/helper. With it you can create puzzles, solve them, count number of solutions from a given board position, and save and load puzzles. This is a beta, and will be upgraded as I find time and interest. Currently there is only an executble file - no installer.
Lomont's Cross Sums
Jan 2002
Puzzle solving program - Nice! It allows automated solving of cross sums, like the ones in Dell magazine. See the page for it for the many, many features. I created this while my wife and I liked doing a cross sum each day before bed in order to generate them for our use.
Lomont's Gomoku
2001
An
unfinished version of "Connect 4". It plays ok, but is beatable. Note
this is NOT finished (and will probably never be worked on again, unless I get the Gomoku bug).
Pong (Arkanoid style)
1994?
Old version of an Arkanoid style Pong I was writing in 1994 or so. DOS version only. Unfinshed.
Old DOS apps
These run from command line, or DOSBOX if necessary. All are old school 256 color VGA programs, and represent a few of the hundreds of graphics effects I programmed "back in the day.".
Ball Demo
1995?
Nice animated balls, the ones drawn in DPaint IIe (which I still have!), with a starfield. Runs a bit too fast nowadays...
Circler
1995?
Animated circle effects, done by drawing
different colors along the circle pixels based on formulas, instead of
one color to one circle.
Wormhole
1995?
The standard wormhole effect done by palette cycling. Now these tricks are almost lost.
Pixel Morph
1995?
A pixel animation - different images built in morph from one to another using pixel mophing.
HP Calculator sutff: 48SX, 48G, 49G 49G+
I'll upload more as I get time. See www.hpcalc.org for good stuff.
Rotating shape demo
2000
A spinning, moving shape demo, with many shapes.
Lomont's Lego CAD Viewer
Feb 2008
This is my first substantial C# program. I am now convinced it is much faster to develop this type of thing in C# than in C++ due to the extensive .NET libraries and the excellent IDE in Visual Studio 2008. Rendering is done in managed Direct3D.
The program loads LDRAW files for viewing and deconstruction. Sourcecode and exe and a sample image file are included for your spastic enjoyment. See my Lego page for a the DAT file for the Technic kits 853 and 854 (pictured). Click the picture for a larger image.
New! - see the Lego screensaver above for a better piece of code.
The program loads LDRAW files for viewing and deconstruction. Sourcecode and exe and a sample image file are included for your spastic enjoyment. See my Lego page for a the DAT file for the Technic kits 853 and 854 (pictured). Click the picture for a larger image.
New! - see the Lego screensaver above for a better piece of code.
Floating point tricks source code
Sept 2005
Here is the code to accompany my article in Games Programming Gems 6 on floating point tricks. This is version 0.5, released Oct 2005, and contains numerous tricks to speed up floating point calculations by treating 32 bit IEEE754 floating point values as 32 bit integers. For a detailed discussion of a few of the tricks, see my papers on floating point methods on my papers page.
Emule 0.43b - Nonsharing version
Oct 2004
A recompiled version of the Emule client that does not share your files back out. Download the big zipfile, extract it and run. If you don't trust me, download the only source file I changed, get all the original source, compare to your heart's content, and recompile. To learn how to connect and use the system, go to http://www.emule-project.net/
Maze Generator
2004
A small command line program that generates 2D and 3D mazes.
AES High Speed encryption source code
2000
This is source code for AES - Advanced Encryption Standard.
It is the fastest C/C++ implementation I have tested, and is released for any use.
Sample Win32 Application
2000
This is a tutorial on how to make a Win32 app under Visual C++ 6.0, but should be useful for other compilers.
C/C++ Coding Conventions
2003
Here I have gathered many C/C++ coding conventions I have found useful. I organized
for some talks I give to groups of developers on making better developers. There are items useful to
languages other than C/C++, although many are C/C++ specific.
Quaternion demonstration
2000?
This is an application showing the difference between interpolating between
quaternion based orientations and Euler based orientations. It shows that quat interpolation rotates
along a great circle as desired, but for some setting Euler angle interpolation makes very ugly
rotations.
Utilities
Here are some tools such as a source code line counter, a hexdump utility, etc., and other software. Some of them are beta, so use at your own risk.
6309/6809 Disassembler
May 2007
This is a small disassembler (and soon to be assembler) for Hitachi 6309 and Motorola 6809 CPUs. It has several nice features, including the ability to view code cycles for disassembled code. See this page for details.
Mini Compression Code
Jan 2007
This is compression source designed for a small, fast decompressor, useful in constrained enviroments, such as embedded systems. It is a modified LZ77/LZSS algorithm, where I modified the symbol output routines to get quite good compression. For example, this seems to beat QuickLZ (a common, fast, and solid LZ compressor/decompressor) for small files (under 64K). See this page for details.
Regular Expression File Renamer
Nov 2006
This is a command line tool that allows file renaming using regular expressions. It creates an optional html
file to show how each file will be renamed. C++ sourcecode is available, and it was built using Visual Studio 2003. The regular
expression part requires boost to be installed (www.boost.org). Like the standard built in rename command ren.exe this is names ren2.exe.
For example: ren2 "([a-zA-Z]{3,3}) ([0-9]+).dat" "$2 $1.dat" would rename the file "dec 2004.dat" to the file "2004 dec.dat"
For example: ren2 "([a-zA-Z]{3,3}) ([0-9]+).dat" "$2 $1.dat" would rename the file "dec 2004.dat" to the file "2004 dec.dat"
Rectangle Packing Tool
Aug 2006
This application fits rectangles into a larger rectangle, and is pretty efficient. The general problem is NP-complete, so there is no efficient optimal algorithm known. This one is pretty fast on my machine - it places 5000 rectangles into a 2500x2800 rectangle in the image shown in a few seconds. It can read/write delimited text files. This program includes C++ /.NET source code, and requires .NET 1.1 or better. Uses include part placement, texture map merging, and many others.
Click the image for a larger view.
Click the image for a larger view.
Logitech G15 Keyboard Info tool
March 2006
This application show a lot of system information on a Logitech G15 keyboard screen in realtime. Some supported
items are drive space, memory, network performance, date/time, winamp info, realtime 3D spinning objects, GDI usage, processor
usage, and much much more. See the attached page for details.
MP3 Tag Editor
Feb 2005
Edit your MP3 tags with the best tool around. Has standard features lie multiple tag editing, filename <-> tag regular expressions, and advanced features like user-configured warnings for tag errors and a similarity finder. See the page for details. Just place the exe file where it can run (on a local drive, not a network drive), and run. Requires .NET 1.1 or higher.
Photomosiac Generator
2003
Create photomosaics. It seems to be the fastest one I can find on the net at making
images once the database is built. See the page for more info. Beta version. Also use my
ImageRipper tool to get libraries of images from Google image searches. Let me know how I can improve it!
Google Image Ripper
2003
Get Google images to your hard drive! Good for making image
libraries to use with my photomosaic tool. Example ideas are searching on flowers, paintings, faces, etc.
ANSI Editor 1.0
2004
An ANSI screen editor. Files are saved as RAW dumps, giving access to use screens in programs.
Supports multiple screens, any size screens, floodfills, gradients, and much more. I wrote this in .NET to get a
tool for making text mode demos for a competition.
FM Tracker
1995?
This is an old DOS based OPL2 tracker based on the HSC format, used in ADLIB and SoundBlaster FM synthesizer cards.
You probably need DOSBOX (search the net) to run it.
You also can find HSC files to play, and place them in a SONGS subdirectory. I have a much better new Windows compatible
version if anyone wants it - just ask me - someday I will post it here :)
Texture mapper demo
2004
This is a perspective correct software texture mapper (source not posted yet, but available for the asking).
I needed a software version of a texture mapper, so I wrote this - it handles a lot of stuff, and is quite fast,
mixing very little assembler with C++ code.
MailEdit
Allows quick editing of standard mail files, like PINE mail files. Allows easy sorting,
merging, cutting, etc. Comes with Win32 sourcecode and makefiles.
Web counter
Dec 2004
A program to implement a simple web counter. I was looking for a simple webcounter that
did not need lots of linked libs, etc., and count not find one. So I wrote this one. It is 2 C++ files,
takes *.gif digit files, and can keep track of as many counters as you need. A basic readme.txt file
contains instructions.
File matcher
2003
This program scans directories and finds duplicate files. Good for cleaning house.
Bin2H
1993?
A simple command line tool to convert binary files to header files
for including in C/C++ programs. Converts file to an array of characters.
IconRipper
2004
I needed a lot of icon files to look at when designing icons for my own use. The libraries on the net
were not quite as good as many commercial programs, so I wrote this to scan a harddrive and get all
icons out of the resources of all programs. So in short - it creates a list of all the icon files from
programs on your harddrive.
LineCount
1995?
A command line tool with many options to count lines of code. It has many options:
recurse directories, filetypes, ignore duplicates (using CRC32 matches), etc.
