OOF2: The Manual
| ElementShapeFuncIterator | ||
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|
Mesh Classes and Functions |  |
Name
ElementShapeFuncIterator — Base class for other Node iterators
Synopses
C++ Synopsis
#include "engine/elementnodeiterator.h"
class ElementShapeFuncIterator: , public ElementNodeIterator {virtual double shapefunction(const MasterPosition& position) const = 0;virtual double dshapefunction(int derivative,
const MasterPosition& position) const = 0;virtual double masterderiv(int derivative,
const MasterPosition& position) const = 0;
}
Python Synopsis
from ooflib.SWIG.engine import elementnodeiterator
class ElementShapeFuncIterator(ElementNodeIterator):def shapefunction(self, position)def dshapefunction(self, derivative, position)
Description
ElementShapeFuncIterator is derived
from ElementNodeIterator
and serves as an abstract base class for ElementMapNodeIterator,
ElementFuncNodeIterator,
and EdgeNodeIterator, and as such
should never be used explicitly.
ElementShapeFuncIterator provides an
API for looping over Nodes with
associated shape
functions, and for evaluating those functions.
Methods
See ElementNodeIterator
for the functions defined in the base class. This section
only lists the new methods introduced in
ElementShapeFuncIterator.
double shapefunction(const MasterPosition& position)
Each Element's
shapefunctions are zero at all but one of the
Element's FuncNodes.
By pairing shape functions with the nodes at which they're
non-zero, a node iterator can identify a shape function as
well as a FuncNode.
ElementFuncNodeIterator::shapefunction
evaluates the iterator's shape function at the master space coordinate
given by position.
double dshapefunction(int derivative,
const MasterPosition& position) const
dshapefunction is just like shapefunction,
but it returns the value of the specified
derivative of the shape function. The
int takes the value
0 for x and
1 for
y.
double masterderiv(int derivative, const
MasterPosition& position) const
masterderiv is just like dshapefunction,
except that it computes the derivative in master coordinate space,
instead of physical space. This is cheaper to compute, but
usually less useful.
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| ElementNodeIterator |  |
ElementMapNodeIterator |