3d plots are only really useful in my opinion if the user can interactively change the angle of the camera to better feel a presence of being in 3d. Outputting a static 3d image like gnuplot usually has me unsure what I'm looking at exactly. So I think this is outside of the scope of what you can do with SVG.
To do 3d, I think we would want to output something that uses the canvas element or webgl.
3d plots are only really useful in my opinion if the user can interactively change the angle of the camera to better feel a presence of being in 3d. Outputting a static 3d image like gnuplot usually has me unsure what I'm looking at exactly. So I think this is outside of the scope of what you can do with SVG.
To do 3d, I think we would want to output something that uses the canvas element or webgl.