How to plot a 3D figure in matlab based on a function like f(x,y,z)=0?

Question

How to plot a 3D figure in MATLAB based on a function like f(x,y,z)=0? And this complicated function can not be written as z = f(x,y).

Answer 1

I just solve this question by this tool from the Matlab File Exchange:
Ezimplot3: implicit 3D functions plotter