MFreeShapeFunction (Artisynth API documentation)

All Known Implementing Classes:

MLSShapeFunction
```
public interface MFreeShapeFunction
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`double`	`eval(int nidx)` Returns the value of the i'th shape function (related to node i)
`void`	`eval(VectorNd N)` Returns the values of the shape functions at the current point
`void`	`eval(VectorNd N, Vector3d[] dNds)` Evaluates both the shape function and derivatives at a given point
`void`	`evalDerivative(int nidx, Vector3d dNds)` Returns the value of the i'th shape function derivatives
`void`	`evalDerivative(Vector3d[] dNds)` Returns the value of all shape function derivatives
`Point3d`	`getCoordinate()` Current coordinate to be used for evaluation
`MFreeNode3d[]`	`getNodes()` Current nodes used for evaluation
`void`	`invalidateRestData()` Invalidate any stored rest information
`void`	`setCoordinate(Point3d pnt)` Set the evaluation coordinate
`void`	`setNodes(MFreeNode3d[] nodes)` Set the rest nodes

- Method Detail
  - setNodes
```
void setNodes(MFreeNode3d[] nodes)
```
    Set the rest nodes
    
    Parameters:
    
    nodes - nodes
  - getNodes
```
MFreeNode3d[] getNodes()
```
    Current nodes used for evaluation
    
    Returns:
    
    nodes affecting shape function
  - invalidateRestData
```
void invalidateRestData()
```
    Invalidate any stored rest information
  - setCoordinate
```
void setCoordinate(Point3d pnt)
```
    Set the evaluation coordinate
  - getCoordinate
```
Point3d getCoordinate()
```
    Current coordinate to be used for evaluation
    
    Returns:
    
    current coordinate
  - 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
  - eval
```
void eval(VectorNd N)
```
    Returns the values of the shape functions at the current point
    
    Parameters:
    
    N - vector of shape functions
  - 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)
  - evalDerivative
```
void evalDerivative(Vector3d[] dNds)
```
    Returns the value of all shape function derivatives
    
    Parameters:
    
    dNds - derivatives (d/dx, d/dy, d/dz)
  - eval
```
void eval(VectorNd N,
          Vector3d[] dNds)
```
    Evaluates both the shape function and derivatives at a given point
    
    Parameters:
    
    N - shape function outputs
    
    dNds - shape function derivative outputs

Interface MFreeShapeFunction

Method Summary

Method Detail

setNodes

getNodes

invalidateRestData

setCoordinate

getCoordinate

eval

eval

evalDerivative

evalDerivative

eval