Waldemar Celes,  Jonathan Corson Rikert. 

This paper presents Act, an object-oriented library for projects from specialized 3D graphics applications to simple interactive educational programs. Act meets the needs of both occasional and expert graphics programmers, offering a high-level access to the OpenGL(tm) library and additional features including object creation, manipulation, and interaction. An interpreted language allows the Act library to be extended easily and dynamically.

http://sibgrapi.sid.inpe.br/rep-/dpi.inpe.br/ambro/1998/03.27.10.03

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