Title :
An exact representation of polygonal objects by C1-continuous scalar fields based on binary space partitioning
Author :
Fryazinov, Oleg ; Pasko, Alexander ; Adzhiev, Valery
Author_Institution :
Nat. Centre for Comput. Animation, Bournemouth Univ., Bournemouth, UK
Abstract :
The problem considered in this work is to find a dimension independent algorithm for the generation of signed scalar fields exactly representing polygonal objects and satisfying the following requirements: the defining real function takes zero value exactly at the polygonal object boundary; no extra zero-value isosurfaces should be generated; C1 continuity of the function in the entire domain. The proposed algorithms are based on the binary space partitioning (BSP) of the object by the planes passing through the polygonal faces and are independent of the object genus, the number of disjoint components, and holes in the initial polygonal mesh. Several extensions of the basic algorithm are proposed to satisfy the selected optimization criteria. The generated BSP-fields allow for applying techniques of the function-based modelling to already existing legacy objects from CAD and computer animation areas, which is illustrated by several examples.
Keywords :
CAD; computer animation; mesh generation; solid modelling; C1-continuous scalar fields; CAD; binary space partitioning; computer animation; function-based modelling; optimization criteria; polygonal mesh; polygonal object boundary; polygonal object representation; signed scalar fields; Animation; Application software; Clouds; Computer aided manufacturing; Data visualization; Euclidean distance; Isosurfaces; Partitioning algorithms; Shape; Topology; BSP-field; Binary Space Partitioning; Boundary representation; Exact Conversion; Function representation; Implicit surfaces;
Conference_Titel :
Shape Modeling and Applications, 2009. SMI 2009. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4069-6
Electronic_ISBN :
978-1-4244-4070-2
DOI :
10.1109/SMI.2009.5170174