Real Time-based Representation of 3d Objects
نویسندگان
چکیده
A realm is a planar graph over a finite resolution grid that has been proposed as a means of overcoming problems of numerical robustness and topological correctness in spatial databases. However, in spatial databases, current data structures based on realm only deal with 2D objects, and cannot be used to describe the complex phenomena in real 3D world. In order to represent 3D spatial objects and the topological relationships between them efficiently in spatial databases, we extend the original realm by following the next steps: (1) Extend the discrete space defined in 2D space to 3D discrete space. (2) Define 3D realm on 3D discrete space. (3) Define 3D realm-based data structures, such as R-block, R-cycle (planar/non-planar), R-face, R-hull and R-volume. (4) Define topological relationships between these 3D realm-based data structures.
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