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vtkGDBStructReader Class Reference

create geometrical representation of GDB structure. More...

#include <vtkGDBStructReader.h>

Inheritance diagram for vtkGDBStructReader

[legend]List of all members.

Public Methods
virtual const char*	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream& os, vtkIndent indent)
virtual void	SetGDBStruct ( GDB* )
virtual GDB*	GetGDBStruct ()
vtkPolyData*	GetVerticesOutput ()
vtkPolyData*	GetEdgesOutput ()
vtkPolyData*	GetSurfacesOutput ()
vtkPolyData*	GetSurfacesPickOutput ()
int*	GetSurfaceCellIds (int surfaceId)
int	GetSurfaceId (int pickId)
virtual void	SetMergePoints ( int )
virtual int	GetMergePoints ()
virtual void	MergePointsOn ()
virtual void	MergePointsOff ()
virtual void	SetMergeSurfacePoints ( int )
virtual int	GetMergeSurfacePoints ()
virtual void	MergeSurfacePointsOn ()
virtual void	MergeSurfacePointsOff ()
B2SPLINE_POINTS	GetGrid (int sid)
int	HaveGrid (int sid)
int	InsertNextGrid (int sid, B2SPLINE_POINTS grid)
void	SetGrid (int loc, B2SPLINE_POINTS grid)
void	CleanGridList ()
void	UpdateInformation ()
void	UpdateData (vtkDataObject *output)
Static Public Methods
vtkGDBStructReader*	New ()
int	IsTypeOf (const char *type)
vtkGDBStructReader*	SafeDownCast (vtkObject *o)
void	GetCellCenter (float center[3], vtkCell *cell)
Protected Methods
	vtkGDBStructReader ()
	~vtkGDBStructReader ()
	vtkGDBStructReader (const vtkGDBStructReader&)
void	operator= (const vtkGDBStructReader&)
void	Execute ()
Protected Attributes
GDB*	GDBStruct
int	MergePoints
int	MergeSurfacePoints
B2SPLINE_POINTS*	gridList
vtkIdList*	gridId
int	gridListSize
vtkIntArray*	Ia
vtkIdList*	Id
vtkTimeStamp	ExecuteTime

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Detailed Description

create geometrical representation of GDB structure.

vtkGDBStructReader is a source object that creates four polygonal data outputs: vertices, edges, surfaces and surfaces pick points. They are used for geometrical representation of GDB structure. Vertices, edges and surfaces are represented by vertex, polyline and triangle strip cells respectively. Surface pick points are represented by vertex cells and are used only as a helper objects for picking surfaces. They are placed in the parametrical center of each visible surface. Each of these pick points is associated with surface cell id list and surface id list so surface can be manipulated (e.g. highlighted). The reason why each entity has its own output is flexibility. Each entity can be colored, labeled and filtered individually. It also simplifies picking since cell ids match GDB ids.

A special grid list is provided for holding computational grids for individual surfaces which are used to speed up interaction. Grids are automaticaly generated only for invisible surfaces, others can be inserted at a later time (but are lost when this object reexecutes).

Warning:

Since vertices are connected with edges, they both use the same vtkPoints objects. vtkMergePoints object is used to merge exactly coincident points. Surfaces use their own vtkPoints object so that their graphical representation can be simplified if necesary. Merging of coincident surface points can also be used for reducing data size.

See also:

vtkMergePoints vtkCellPicker vtkGeometryFilter

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Member Function Documentation

void CleanGridList ( )

Emptys the grid list.

void GetCellCenter ( float center[3], vtkCell * cell ) [static]

Returns the center of the specified cell. (The center is the parametric center of the cell, not necessarily the geometric or bounding box center.)

B2SPLINE_POINTS GetGrid ( int sid ) [inline]

Get computational grid for specified surface. If the grid was not yet generated, returns the first grid in the list.

int * GetSurfaceCellIds ( int surfaceId )

Get minimum and maximum cell id of a surface. Surface cells with ids between these two (inclusive) represent a surface.

int GetSurfaceId ( int pickId ) [inline]

Returns surface id of the picked surface pick point.

vtkPolyData * GetVerticesOutput ( ) [inline]

Get dataset for each entity.

int HaveGrid ( int sid ) [inline]

Check if there is a grid for specified surface. Returns 1 if there is one, 0 otherwise.

int InsertNextGrid ( int sid, B2SPLINE_POINTS grid )

Inserts computational grid for specified surface in the list. Memory is allocated if necessary.

vtkGDBStructReader * New ( ) [static]

Instantiates object with both points merging on. Reimplemented from vtkPolyDataSource.

void SetGDBStruct ( GDB * ) [virtual]

Set/Get pointer to GDB structure to read from.

void SetGrid ( int loc, B2SPLINE_POINTS grid ) [inline]

Inserts computational grid in specified location in the list. Memory checking is not performed. Can be used for replacing a grid.

void SetMergePoints ( int ) [virtual]

Enable/Disable merging of cooncident points when building vertices and edges output.

void SetMergeSurfacePoints ( int ) [virtual]

Enable/Disable merging of cooncident points when building surfaces output.

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

• vtkGDBStructReader.h

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