/**

@defgroup PovVM POV-Ray User-Defined Function VM
@ingroup PovSource
@brief Virtual machine executing user-defined functions.

This module implements a virtual machine to execute user-defined functions, both during parsing and
at render time.

The vm module depends on the @ref PovBase and @ref PovCore.

@{

@dir
@brief Source code files for the @ref PovVM.

@}

*/
