The second work package will introduce automatic and practical clustering algorithms as well as a comprehensive hierarchical treatment of terrain and curved surface data, and natural lighting.
The need for such algorithms stems from the now well-recognized fact that complex environments can not be considered "flatly" as a collection of independent surface elements, for the purpose of energy balance calculation. Instead, the intrinsic quadratic nature of the transport equations (every object can potentially interact with any other object) make it necessary to use hierarchical formulations. These in turn depend on the availability of practical algorithms to
The results of this work package are (or will be) presented in the deliverables.