artisynth.core.mfreemodels

Interface MFreeShapeFunction

All Known Implementing Classes:

GMLSShapeFunction, MLSShapeFunction

public interface MFreeShapeFunction

Method Summary

Modifier and Type	Method and Description
double	eval(int nidx) Returns the value of the i'th shape function (related to node i)
void	evalDerivative(int nidx, Vector3d dNds) Returns the value of the i'th shape function derivatives
Point3d	getCoordinate() Current coordinate to be used for evaluation
MFreeNode3d[]	getNodes() Current nodes used for evaluation
boolean	maybeUpdate(Vector3d coords, MFreeNode3d[] myNodes) Update only if coords and nodes are different
void	update(Point3d pnt, MFreeNode3d[] nodes) Update internals for computing the shape function value and derivatives at the given point

Method Detail

getCoordinate

Point3d getCoordinate()

Current coordinate to be used for evaluation

Returns:

current coordinate

getNodes

MFreeNode3d[] getNodes()

Current nodes used for evaluation

Returns:

nodes affecting shape function

update

void update(Point3d pnt,
            MFreeNode3d[] nodes)

Update internals for computing the shape function value and derivatives at the given point

Parameters:

pnt - point at which to evaluate shape functions

nodes - dependent nodes

eval

double eval(int nidx)

Returns the value of the i'th shape function (related to node i)

Parameters:

nidx - node index

Returns:

computed value

evalDerivative

void evalDerivative(int nidx,
                    Vector3d dNds)

Returns the value of the i'th shape function derivatives

Parameters:

nidx - node index

dNds - derivatives (d/dx, d/dy, d/dz)

maybeUpdate

boolean maybeUpdate(Vector3d coords,
                    MFreeNode3d[] myNodes)

Update only if coords and nodes are different

Parameters:

coords - natural coordinates

myNodes - nodes for shape function

Returns:

true if updated