vtkPolygonalSurfaceContourLineInterpolator Class Reference

#include <vtkPolygonalSurfaceContourLineInterpolator.h>

Inheritance diagram for vtkPolygonalSurfaceContourLineInterpolator:

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Collaboration diagram for vtkPolygonalSurfaceContourLineInterpolator:

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List of all members.


Detailed Description

Contour interpolator for to place points on polygonal surfaces.

vtkPolygonalSurfaceContourLineInterpolator interpolates and places contour points on polygonal surfaces. The class interpolates nodes by computing a graph geodesic lying on the polygonal data. By graph Geodesic, we mean that the line interpolating the two end points traverses along on the mesh edges so as to form the shortest path. A Dijkstra algorithm is used to compute the path. See vtkDijkstraGraphGeodesicPath.

The class is mean to be used in conjunction with vtkPolygonalSurfacePointPlacer. The reason for this weak coupling is a performance issue, both classes need to perform a cell pick, and coupling avoids multiple cell picks (cell picks are slow).

Warning:
You should have computed cell normals for the input polydata.
See also:
vtkDijkstraGraphGeodesicPath, vtkPolyDataNormals
Tests:
vtkPolygonalSurfaceContourLineInterpolator (Tests)

Definition at line 49 of file vtkPolygonalSurfaceContourLineInterpolator.h.

typedef
vtkPolyDataContourLineInterpolator 
Superclass
virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
static int IsTypeOf (const char *type)
static
vtkPolygonalSurfaceContourLineInterpolator
SafeDownCast (vtkObject *o)

Public Member Functions

virtual int InterpolateLine (vtkRenderer *ren, vtkContourRepresentation *rep, int idx1, int idx2)
virtual int UpdateNode (vtkRenderer *, vtkContourRepresentation *, double *vtkNotUsed(node), int vtkNotUsed(idx))
virtual void SetDistanceOffset (double)
virtual double GetDistanceOffset ()

Static Public Member Functions

static
vtkPolygonalSurfaceContourLineInterpolator
New ()

Protected Member Functions

 vtkPolygonalSurfaceContourLineInterpolator ()
 ~vtkPolygonalSurfaceContourLineInterpolator ()

Protected Attributes

double DistanceOffset

Member Typedef Documentation

Standard methods for instances of this class.

Reimplemented from vtkPolyDataContourLineInterpolator.

Definition at line 54 of file vtkPolygonalSurfaceContourLineInterpolator.h.


Constructor & Destructor Documentation

vtkPolygonalSurfaceContourLineInterpolator::vtkPolygonalSurfaceContourLineInterpolator (  )  [protected]

vtkPolygonalSurfaceContourLineInterpolator::~vtkPolygonalSurfaceContourLineInterpolator (  )  [protected]


Member Function Documentation

virtual const char* vtkPolygonalSurfaceContourLineInterpolator::GetClassName (  )  [virtual]

Standard methods for instances of this class.

Reimplemented from vtkPolyDataContourLineInterpolator.

static int vtkPolygonalSurfaceContourLineInterpolator::IsTypeOf ( const char *  type  )  [static]

Standard methods for instances of this class.

Reimplemented from vtkPolyDataContourLineInterpolator.

virtual int vtkPolygonalSurfaceContourLineInterpolator::IsA ( const char *  type  )  [virtual]

Standard methods for instances of this class.

Reimplemented from vtkPolyDataContourLineInterpolator.

static vtkPolygonalSurfaceContourLineInterpolator* vtkPolygonalSurfaceContourLineInterpolator::SafeDownCast ( vtkObject o  )  [static]

Standard methods for instances of this class.

Reimplemented from vtkPolyDataContourLineInterpolator.

void vtkPolygonalSurfaceContourLineInterpolator::PrintSelf ( ostream &  os,
vtkIndent  indent 
) [virtual]

Standard methods for instances of this class.

Reimplemented from vtkPolyDataContourLineInterpolator.

static vtkPolygonalSurfaceContourLineInterpolator* vtkPolygonalSurfaceContourLineInterpolator::New (  )  [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkObject.

virtual int vtkPolygonalSurfaceContourLineInterpolator::InterpolateLine ( vtkRenderer ren,
vtkContourRepresentation rep,
int  idx1,
int  idx2 
) [virtual]

Subclasses that wish to interpolate a line segment must implement this. For instance vtkBezierContourLineInterpolator adds nodes between idx1 and idx2, that allow the contour to adhere to a bezier curve.

Implements vtkPolyDataContourLineInterpolator.

virtual int vtkPolygonalSurfaceContourLineInterpolator::UpdateNode ( vtkRenderer ,
vtkContourRepresentation ,
double *  vtkNotUsednode,
int   vtkNotUsedidx 
) [virtual]

The interpolator is given a chance to update the node. vtkImageContourLineInterpolator updates the idx'th node in the contour, so it automatically sticks to edges in the vicinity as the user constructs the contour. Returns 0 if the node (world position) is unchanged.

Implements vtkPolyDataContourLineInterpolator.

virtual void vtkPolygonalSurfaceContourLineInterpolator::SetDistanceOffset ( double   )  [virtual]

Height offset at which points may be placed on the polygonal surface. If you specify a non-zero value here, be sure to have computed vertex normals on your input polygonal data. (easily done with vtkPolyDataNormals).

virtual double vtkPolygonalSurfaceContourLineInterpolator::GetDistanceOffset (  )  [virtual]

Height offset at which points may be placed on the polygonal surface. If you specify a non-zero value here, be sure to have computed vertex normals on your input polygonal data. (easily done with vtkPolyDataNormals).


Member Data Documentation

Draw the polyline at a certain height (in the direction of the vertex normal) above the polydata.

Definition at line 96 of file vtkPolygonalSurfaceContourLineInterpolator.h.


The documentation for this class was generated from the following file:

Generated on Wed Jun 3 19:26:21 2009 for VTK by  doxygen 1.5.6