  In this paper we present a framework for the rendering of dynamic 3D virtual
environments which can be integrated in the development of videogames. It
includes methods to manage sounds and particle effects, paged static
geometries, the support of a physics engine and various input systems. It has
been designed with a modular structure to allow future expansions. We exploited
some open-source state-of-the-art components such as OGRE, PhysX,
ParticleUniverse, etc.; all of them have been properly integrated to obtain
peculiar physical and environmental effects. The stand-alone version of the
application is fully compatible with Direct3D and OpenGL APIs and adopts OpenAL
APIs to manage audio cards. Concluding, we devised a showcase demo which
reproduces a dynamic 3D environment, including some particular effects: the
alternation of day and night infuencing the lighting of the scene, the
rendering of terrain, water and vegetation, the reproduction of sounds and
atmospheric agents.
