Animated Smooth Levels of Detail Coarse View-Dependent Multi-Resolution Models for Hierarchical and Deformable Polygonal Objects Project duration: 1997-1999 Contact: Dieter Schmalstieg, Anton Fuhrmann
Description	The ASLOD (Animated Smooth Level Of Detail) approach presented in this paper is capable of animating and rendering scenes consisting of mixtures of conventional and multi-resolution models, and apply deformation to objects.
Application	Large-scale virtual environments and other interactive graphical applications which require both real-time rendering with constant high frame rates and animation of rigid as well as organically deformable models.
Problems	While a large amount of work is geared towards multi-resolution modeling and rendering, the presented methods work almost exclusively with static models and scenes. New approaches are needed to include animation and deformation as well.
Approach	ASLOD features coarse view-dependent multi-resolution rendering by a consistent decomposition of large models into arbitrary regions together with an analytic solution to optimize polygon allocation to such assemblies of multi-resolution models. The multi-resolution model can be used together with animated hierarchical scene graphs. Finally, the multi-resolution model can be combined with a hierarchical skeleton and a real-time deformation algorithm for animating organic shapes rendered at any desired level of detail.
Publications	Coarse View-Dependent Levels of Detail for Hierarchical and Deformable Models (D. Schmalstieg and A. Fuhrmann). Technical report TR-186-2-99-20, Vienna University of Technology, 1999.

Coarse View-Dependent Rendering

Animation and Deformation

The two images above show two snap shots from a simultaneous deformation and region-based view-dependent simplification procedure. Note that all computation is done in real-time.