This thesis presents a new system for fast rendering of complex scenes. The system is
based on occlusion culling, which is resolved with the help of the occlusion query function …

The importance of virtual worlds as a medium for interaction in different fields, such as
marketing or private online networks is currently growing. Although much work has been …

This chapter covers geometric continuity with emphasis on a constructive definition for
piecewise parametrized surfaces. The examples in Section 1 show the need for a notion of …