Next: Mesh Size Control Up: Parallel Mesh Generation Previous: Parallel Mesh Generation

Model Description

Model is, similarly as in the sequential mesh generator, described by the boundary representation and consists of the same model entities -- vertices, curves, surfaces and regions. This time, however, each model entity (including regions) is based on free-form representation in terms of tensor product polynomial entities (again, the rational Bezier entities are employed), which essentially restricts the model topology. In this approach, each region is bounded by six surfaces, boundary each of which is formed by four curves, each of which is in turn given by two vertices. The advantage of this model representation consists in existence of unique mapping between the parametric and real spaces of each of the model entities. This significantly contributes to unified handling of individual model entities. On the other hand, the restriction on the model topology results in some reduction of modeling flexibility. To enhance the modeling capability curves and surfaces (and even regions) are allowed to be degenerated into entity of lower dimension. Also a simple entity-to-entity fixation concept is employed. Each model entity is keeping the list of entities which are bounding and sharing that entity. No further topological information are required for description of valid domain of arbitrary complexity.



Next: Mesh Size Control Up: Parallel Mesh Generation Previous: Parallel Mesh Generation

Daniel Rypl
2005-12-03