Is it possible to define a new command in Tikz, which will use the same arguments as the \path [line] (node1) -- (node2); command, but which draws instead a 3D tube?
How do I extract coordinates from a three-dimensional point defined when using tikz-3dplot? I would like to perform some calculations on these (more specifically a cross-product of two vectors), but ...
I'm drawing a lot of 3D pictures for school using 3D-plot for TikZ. I like it when the lines that are inside or behind an object, eg. the ones that shouldn't be visible to be thinner than the lines ...