I've got three functions (x,z,t) which are themselves numerical functions of two parameters (sigma, tau). I've parametric plotted the functions to get a surface in 3D space. Now, I want to take a slice along this surface at constant t, but I don't know how to do this - up till now I've had to make do with setting one of the sheet parameters to be constant, but this of course isn't the same thing.
Could anybody give a suggestion as to how to solve this?
Thanks a lot in advance.