What do I need to get started making parts for the LDraw library?

[Willy Tschager]

You might use any CAD prog that exports to .stl such as Solidworks, Autocad ... and use:

http://marc.klein.free.fr/lego/stl2dat/stl2dat.html

to convert to the dat file format reading the modelling typs carefully:

http://marc.klein.free.fr/lego/parts/modelise.html

w.