A saucer / 2D construction program question

this is my first (textured) model. Not too complicated :wink:

It took me 5 minutes to model the saucer, but 2 hours
to make the texture (mainly searching the correct program
for this). As the texture should be constructed mathematically
(by specifying exact line intersection locations), I tried pixmap,
xfig, gimp etc. Finally, I ended up creating the texture as a
2D model in blender, and rendered it in orthographic mode
as a wireframe. Then I used gimp to fill in the colors.

Is there a better 2D construction program? (Must run on Linux).

Best regards,