Hello,
My company Kavalogic has developed a Common Lisp binding to Open Inventor called "Clive", which is compatible with Coin. Clive has Lisp translations of most of the Inventor Mentor examples. The project offers an extension called "Volumen" which wraps SIM Voleon as well as an extension called "Corral" which provides a Lisp scripting engine. Clive can be used within a REPL or as a compiled program, currently for ECL or SBCL Lisp.
To implement the language binding, Clive flattens the Inventor C++ API to a C library/API (similar to the original SGI C API). This could eventually be used to program Inventor projects in C, or adapted for other language bindings.
Clive is free software (LGPL 2.1, currently "alpha" status), the project page is:
https://www.common-lisp.net/project/cliveClive also integrates with the Kavalogic project "Tovero"--a functional representation modeling system in Lisp at:
https://www.common-lisp.net/project/toveroRegards,
Stewart Milberger