OOF2: The Manual
| Bisection (Bisection) | ||
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6.5.2. Subclasses |  |
Name
Bisection (Bisection) — Divide element edges into two.
Synopsis
Bisection(rule_set)
Details
-
Base class:
RefinementDegree -
Parameters:
rule_set- How to subdivide elements. Type: An object from the
RuleSetenumerated class.
Description
Refining Skeleton
elements with degree set to
Bisection divides each marked edge into two
segments.
The rule_set parameter determines how the
interior of each element is subdivided, given the number of
subdivisions on each edge. The complete set of refinement rules
for Bisection can be found in Table 6.8 and Table 6.9.
Figure 6.64 shows a Skeleton refined by
the conservative bisection rule set, which
preserves the topology of the elements (quadrilaterals beget
quadrilaterals and triangles beget triangles). The original
unrefined Skeleton is shown in Figure "Refining a Skeleton" (a), and
the refined elements are indicated with heavy black edges.
The liberal Bisection
rule set is presented in Figure 6.65. As
expected. the Skeleton features a mixture of triangles and
quadrilaterals -- note that its original Skeleton contained only
quadrilaterals.
Figure 6.65. Bisected Elements - Liberal
Triangles and Quadrilaterals exisiting together peacefully.
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| BiCG (BiConjugateGradient) |  |
Bitmap (BitmapDisplayMethod) |