The generation process (as well of PPP as of CATHI) works incrementally to allow an interactive presentation system to generate animations and show them with a limited delay, which is important for short system response times. In some papers about this work we ( Antonio Krüger and I) have shown which type of incrementality is supported by the system and we've described a way to enhance the results by automatically generated abstractions (simplified 3D models).
Depending on the available graphical output devices and facilities the system may produce animation scripts for simple wire-frame graphics or sophisticated lighting and shading models. The availability of such features as color or spotlights is already considered in the process of script generation. This allows optimal use of the available expressiveness, thus making CATHI a resource-adaptive system. Currently output can be done to Geomview, a scientific visualization tool written at the University of Minnesota, to RenderMan and VRML 2.0 (work in progress).
Here are some example animations produced with the RenderMan interface. Some day I will provide a better way to play with it through the Web via VRML2.