Yao Chang-Li sent me a Traditional Chinese translation and help file. It is included in the .403 file.
KSEG can be used in the classroom, for personal exploration of geometry, or for making high-quality figures for LaTeX. It is very fast, stable, and the UI has been designed for efficiency and consistency. I can usually make a construction in KSEG in less than half the time it takes me to do it with similar programs. Despite the name, it is Qt based and does not require KDE to run.
KSEG was inspired by the Geometer's Sketchpad, but it goes beyond the functionality that Sketchpad provides.
Although I develop KSEG in Linux, people have compiled it under Mac OS X and FreeBSD. For Mac OS X 10.3 and later, Markus Bongard built a standalone binary installer for KSEG, which also includes Qt. Get it here (about 5 MB download).
Here is the windows executable, version 0.401, and the ported (read: mutilated) source.
- Fast core which can support large constructions
- Free/GPL-runs on Linux (and probably most other systems which support Qt)
- Supports multiple languages
- Fully Documented
- Construction of points, segments, rays, lines, circles, and arcs
- Make measurements
- Transformations (rotation, translation, scaling, reflection)
- Construction of adaptively sampled loci for better quality and speed
- Reverse dragging
- Infinite undo/redo
- Ability to easily redefine points to "edit" drawings
- Easy to use editable scripting/macro with support for recursion
- Pretty formulas for calculations-with my libkformula
- Pretty colors, fonts, etc.
- View panning/zooming and multiple simultaneous views
- Export view to image file, including antialiased option
- Selection Groups--group a bunch of objects, then select them later with two clicks
Click on screenshot 3 to read more about it.
SEG started out as a little DOS program (in DJGPP) back in 1996 because I didn't want to pay $40 for a copy of Sketchpad. It was my first real C++ project and I made many design mistakes. Then I rewrote it under Windows and it was way better-fast, very stable, flexible and easy to use. I have successfully used it to generate the idea and write my highschool senior thesis (on chaotic dynamics of a family of geometrically-defined functions) and have played around with it a lot. Finally, I rewrote SEG a third time for linux (calling it KSEG because initially it was a KDE project--but I found the KDE API's were changing too fast for me to keep up), using my experience with the previous two designs. It has gone from a program for my personal use into a real piece of interactive educational software. Although I know that it is being used in education, I have heard few details about the experience, so please, if you use KSEG for teaching math in a school or college, write me about it.
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