Functor is a practical mathematical utility to represent 3D algebraic functions of the z=f(x,y) type.
The Functor user can specify the texture and the colours of the 3D graphics that are generated from the results of the function.
From the version 2.9 of Functor you can export the graphic representations to VRML and BMP formats, so that they can be published on a webpage. Of course the user can change the values of X and Y in the original function to get a new 3G graphic representation of the behaviour of this mathematical function.
Functor lets you view the graphic from different angles.