/ You may run Compoly as a java applet from a browser. For this download the html file, the class files and the help files . Unzip the two compressed files in a directory, then load compolye.html from a browser.

Compoly runs also as a stand alone java program. For this download the jar file and the help files . The program starts with the command
java -jar compolye.jar
or in Windows by clicking on the file compolye.jar. After unzipped the compehelp.zip you may read the help by starting the file compehelp.html.

The applet is not alowed to write output files. This is possible only from the java program which exports the data of the constructed composition in .obj and in .wrl formats. These files are numerated during a session. After closing the program you have to rename them, if you want preserve them.

I have developed Compoly for teaching descriptive geometry. In the first line for visualizing simple solids in Monge's projection and the line of intersection of two pyramids, prisms, cones, cylinders and their plane sections. Therefore, the visibility algorithms are restricted to convex components. By the help of red-green glasses the anaglyph figures in central projection provide real spatial impression. By exporting the data of the constructed composition to javaview or euler3d you may get more impressive pictures.

Some examples are shown in the following pictures constructed by Compoly:

1. building of a museum

2. toy truck

3. tower

shown by euler3d:

exported in wrl format.

4. a cog-wheel constructed as a composition of regular prisms

5. a simple chapel for the start

Have a lot of fun!

07.02.2008. M. Szilvasi-Nagy (szilvasi@math.bme.hu)