Adaptive sampling and tessellation for displacement mapping hardware [Elektronische Ressource] / vorgelegt von Johannes Hirche

Adaptive Sampling andTessellation for DisplacementMapping HardwareDissertationder Fakultät für Informations- und Kognitionswissenschaftender Eberhard-Karls-Universität Tübingenzur Erlangung des Grades einesDoktors der Naturwissenschaften(Dr. rer. nat.)vorgelegt vonDipl.-Inform. Johannes Hircheaus TübingenTübingen2003Tag der mündlichen Qualifikation: 17.12.2003Dekan: Prof. Dr. Ulrich Güntzer1. Berichterstatter: Prof. Dr.-Ing. Dr.-Ing. E.h. Wolfgang Straßer2. Berichterstatter: Prof. Dr. Wolfgang RosenstielAbstractIn this thesis, new algorithms and architectures are presented for the acquisition andrendering of displacement maps. Displacement mapping is a popular rendering techniquecommonlyfoundincommercialrenderingpackages, itmodifiesthesurfaceofanotherwiseflat triangle by displacing its points according to a height field, giving the impression of astructured surface. Although widely used in software renderers for many years, hardwareaccelerated rendering was long missing, because of the difficulties involved. The mainfocus of this work is on adaptively rendering techniques, especially adaptively tessellatingtriangularmeshes toimprove rendering performanceandreduce bandwidth requirements.Following a general definition of displacement maps, possible sources of displacementmaps are presented and examples are given.