Curv: A language for making art using mathematics (github.com)

Antimony [1] and its related project AO [2], as well as ImplicitCAD [3], are CAD-oriented F-Rep systems (that suffer from the problem I mention).

[1] https://www.mattkeeter.com/projects/antimony/3/

[2] https://www.mattkeeter.com/projects/ao/

[3] http://www.implicitcad.org

http://www.povray.org/

They have a hall of fame http://hof.povray.org/

And they even have a “dial-up version” (low bandwidth) of their hall of fame and I think it’s just super cute that they have retained the name “dial-up version” for that. http://hof.povray.org/index-lb.html

Also worth checking out is old versions of their website archived by The Internet Archive. 20 years ago: https://web.archive.org/web/19990210111443/http://www.povray... Click “gallery” (they were using frames so I can’t link it directly with the navigation intact).

sudo apt install cmake git-core libboost-all-dev libdouble-conversion-dev libopenexr-dev libtbb-dev libglm-dev gedit checkinstall && sudo apt-get install libxcursor-dev libxinerama-dev libxrandr-dev libglu1-mesa-dev libgles2-mesa-dev libgl1-mesa-dev libxi-dev && git clone --recursive https://github.com/doug-moen/curv; cd curv; make; sudo checkinstall -D; sudo dpkg -i ./curv.deb

Then used this from the examples:

  make_shape {
      dist : everything.dist,
      colour (x,y,_,_) :
          let z = [x,y];
              color = [0,0,0];
              done = false;
          in do
              for (i in 0 ..< 100) (
                  if (!done) (
                      z := csqr(z) + [x,y];
                      if (dot(z,z) > 4)
                          let cr = (i-1)-log(log(dot(z,z))/log 2)/log 2;
                          in (
                              color := [0.95+.012*cr, 1, .2+.4*(1+sin(.3*cr))];
                              done := true;
                          )
                  )
              );
          in sRGB.HSV color,
      bbox : [[-2.5,-2,-2],[1.5,2,2]],
      is_2d : true, 
  }