Helge Drumm
ABSTRACT
Authors who create interactive 3D-applications mostly suffer under the absences of an easy real-time shadow creation. Even new description languages like MPEG-4 do not support any shadow descriptions as yet. The general lack of existing shadow description possibilities was the inspiration of our research work.
We present a novel approach, which enables a simple, flexible and universal solution for the shadow description and management with scene graph based applications.
We introduce a new theory we call the "Theory of Shadow Relationships", where shadows are represented by relationships formed by several syntactical and semantical descriptions. The result is a basis for the shadow description itself and the shadow management. The visual rendering of shadows is independent of our solution. The results of our research are used for the development of a new MPEG-4 tool - the "Shadow Node". We show the use of the "Theory of Shadow Relationships" compliant to the MPEG-4 standard.
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Index Terms
- MPEG-4 based real-time shadows
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