[vtkusers] implicit functions other than quadric

[Feiqi Zhang]

Hello, 
I am looking for a method to visualize implicit functions like 
F(x,y,z)=sin(x)+cos(y)*2+exp(z)
F(x,y,z)=x^5+y*z^3+x*y
I cannot find any suitable Class under "vtkImplicitFunction" that can solve 
this problem. But, I don't believe vtk cannot handle such functions which are 
mathematically simple.

Anybody can give me a hint how to do it?

Thanks a lot.

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