Peter Seibel wrote:

> There are presently two categories of projects, "Proposed Projects"  
> which are mostly just distillations of the conversations that have  
> happened on the list and "Championed Projects" which are projects  
> that have a person (the champion) who's stepped forward to guide the  
> project. That person needn't be an experienced Lisper (though for  
> some projects it will help).

There are many proposed projects for infrastructure, but this doesn't help
a newbie to write own programs. When I have some time over xmas, I want to
write a STL viewer (see http://www.solidimage3d.com/cad2stl.html for a
definition of STL). This should be available for free on Windows, Mac OS X
and Linux. I have all three systems here to test it. My goal is to build it
with wxCL and OpenGL, using one source base and some scripts for creating
installation packages of the viewer program for all three systems. Other
people can use this as a base for own applications, by just deleting the
source they don't need, e.g. the 3D rendering part, but e.g. keeping the
application window, menu handling and installation package creation
scripts.

If there is some interest in this project, I'll add a proposed projects
page to the ALU wiki.

Some background why I want to write this program: I've designed a xmas
model with a 3D program ( http://www.frank-buss.de/tmp/xmas-3dsmax.jpg )
for printing with a 3D printer, but the 3D printer service provider needed
a valid STL file, which was very difficult to create with the 3D program,
because there are errors in exporting the data and within the program it is
difficult to design a model that is valid STL, but finally I managed it
with many manual work and the indirection of using VRML as output. The
printed model: 

http://www.frank-buss.de/tmp/xmas-printed1.jpg
http://www.frank-buss.de/tmp/xmas-printed2.jpg

I want to write a program, which can produce valid STL output from every 3D
data input without much manual work. Perhaps I can sell this (there are
already good programs, but with Lisp it is easy to make it very flexible,
like customizing it with own Lisp code like in AutoCAD). The base for this
program is the STL viewer, which will remain free (BSD licence).

-- 
Frank Buß, [EMAIL PROTECTED]
http://www.frank-buss.de, http://www.it4-systems.de

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