Zeta is a prototypal Resolution Modeling system.
Zeta supports the construction of variable resolution models out of a multiresolution mesh represented adopting the hypertriangulation scheme.
The Zeta prototype is available in public domain. The sw has been compiled for SGI workstations running Irix 6.2.
Very large graphics models are common in a number of applications, and many different simplification methods have been recently developed. Some of them support the construction of multiresolution representations of the input meshes. On the basis of these innovative techniques, we foresee a modeling framework based on three separate stages (shape modeling, multiresolution encoding and resolution modeling), and propose a new approach to the last stage, resolution modeling, which is highly general, user-driven and not strictly tied to a particular simplification method.
The approach proposed is based on a multiresolution representation scheme for triangulated, 2-manifold meshes, the Hypertriangulation Model (HyT). This scheme allows to selectively "walk" along the multiresolution surface, moving between adjacent faces efficiently. A prototypal resolution modeling system, Zeta, has been implemented to allow interactive modeling of surface details and evaluated on several practical models. It supports: efficient extraction of fixed resolution representations; unified management of selective refinement and selective simplification; easy composition of the selective refinement/simplification actions, with no cracks in the variable resolution mesh produced; multiresolution editing; interactive response times.