VTK/Examples/Cxx

These are fully independent, compilable examples. There is significant overlap in the examples, but they are each intended to illustrate a different concept and be fully stand alone compilable.

Please add examples in your areas of expertise!

Hello World

Example Name	VTK Classes Demonstrated	Description
A hello world example	vtkPolyDataMapper vtkActor vtkRenderer vtkRenderWindow vtkRenderWindowInteractor	Cylinder example from the VTK Textbook and source code.

Simple Operations

Example Name	VTK Classes Demonstrated	Description
DistanceBetweenPoints	vtkMath::Distance2BetweenPoints	Distance between two points.
DistancePointToLine	vtkLine	Distance between a point and a line.
FloatingPointExceptions	vtkFloatingPointExceptions	Floating Point Exceptions
GaussianRandomNumber	vtkMath	Generates Gaussian random numbers.
UniformRandomNumber	vtkMath	Generates uniform random numbers.
RandomSequence	vtkMinimalStandardRandomSequence	This is the preferred way to generate random numbers.
ProjectPointPlane	vtkPlane	Project a point onto a plane.
PerspectiveTransform	vtkPerspectiveTransform	Apply a perspective transformation to a point.

Input and Output

3D File Formats

Example Name	VTK Classes Demonstrated	Description
ConvertFile		Convert a file from one type to another
XGMLReader	vtkXGMLReader	Read a .gml file

Standard Formats

Input

Example Name	VTK Classes Demonstrated	Description
SimplePointsReader	vtkSimplePointsReader	Read a simple "xyz" file of points.
ParticleReader	vtkParticleReader	This example reads ascii files where each line consists of points with its position (x,y,z) and (optionally) one scalar or binary files in RAW 3d file format.
ReadPlainText	vtkPolyData	Read a plain text file into a polydata.
ReadPlainTextTriangles	vtkPolyData vtkSmartPointer vtkPoints vtkCellArray vtkXMLPolyDataWriter	Read a plain text file into a polydata.
ReadDelimitedFile	vtkDelimitedTextReader	Read a delimited file into a polydata.
ReadOBJ	vtkOBJReader	Read an OBJ (.obj) file.
VRML	vtkVRMLImporter	Read a VRML (WRL) file.
IndividualVRML	vtkVRMLImporter	This example is used to get each actor and object from a scene and verify axes correspondence
ReadDICOM	vtkDICOMImageReader	Read DICOM file
ReadDICOMSeries	vtkDICOMImageReader	This example demonstrates how to read a series of DICOM images and scroll through slices
DumpXMLFile	vtkDataSetReader	Report the contents of a VTK XML or legacy file
DEMReader	vtkDEMReader	Read DEM (elevation map) files
ReadSTL	vtkSTLReader	Read stereo lithography STL (.stl) files
ReadPLY	vtkPLYReader	Read PLY (.ply) files
ReadPLOT3D	vtkPLOT3DReader	Read CFD (computational fluid dynamics) data produced by PLOT3D.
ReadPDB	vtkPDBReader	Read Protein Data Bank Files.

Output

Example Name	VTK Classes Demonstrated	Description
DelimitedTextWriter	vtkDelimitedTextWriter	Write data to a delimited file
SimplePointsWriter	vtkSimplePointsWriter	Write a simple ".xyz" file
WritePLY	vtkPLYWriter	Write PLY (.ply) files
WriteSTL	vtkSTLWriter	Write stereo lithography STL (.stl) files

VTK Formats

Input

Example Name	VTK Classes Demonstrated	Description
ReadImageData	vtkXMLImageDataReader	Read a image data (.vti) file
ReadPolyData	vtkXMLPolyDataReader	Read a polygonal data (.vtp) file
ReadRectilinearGrid	vtkXMLRectilinearGridReader	Read a rectilinear grid (.vtr) file
ReadStructuredGrid	vtkXMLStructuredGridReader	Read a structured grid (.vts) file
ReadUnknownTypeXMLFile	vtkXMLGenericDataObjectReader	Read an XML file and later decide what kind it is
ReadUnstructuredGrid	vtkXMLUnstructuredGridReader	Read an unstructured grid (.vtu) file

Output

Example Name	VTK Classes Demonstrated	Description
WriteVTU	vtkXMLUnstructuredGridWriter	Write a .vtu file. VTU is an "Unstructured Grid". This format allows for 3D data to be stored.
WriteVTP	vtkXMLPolyDataWriter	Write a .vtp file. VTP is a "PolyData". This format allows for the most complex geometric objects to be stored.
WriteVTI	vtkXMLImageDataWriter	Write a .vti file. VTI is an "ImageData".
ExportDICOMtoVTI	vtkXMLImageDataWriter	Write a .vti file from a DICOM image.
XMLStructuredGridWriter	vtkXMLStructuredGridWriter	Write a .vts file from a vtkStructuredGrid.

Legacy VTK Formats

Example Name	VTK Classes Demonstrated	Description
GenericDataObjectReader	vtkGenericDataObjectReader	Read any type of legacy .vtk file.
StructuredGridReader	vtkStructuredGridReader	Read a structured grid (.vtk) file.
StructuredPointsReader	vtkStructuredPointsReader	Read a structured points (.vtk) file.

Image Formats

Input

Example Name	VTK Classes Demonstrated	Description
ReadBMP	vtkBMPReader	Read BMP (.bmp) files.
JPEGReader	vtkJPEGReader	Read a JPG image.
PNGReader	vtkPNGReader	Read a PNG image.
ReadPNM	vtkPNMReader	Read PNM (.pnm) files.
ReadTIFF	vtkTIFFReader	Read TIFF (.tif) files.
MetaImageReader	vtkMetaImageReader	Read .mha files.
ImageReader2Factory	vtkImageReader2Factory	This class tries to find an appropriate reader. It is very convenient to use this when you don't know what kind of file to expect.

Output

Example Name	VTK Classes Demonstrated	Description
JPEGWriter	vtkJPEGWriter	Write a JPEG (.jpg) file.
MetaImageWriter	vtkMetaImageWriter	Write a .mha/.mhd + .raw file.
WriteBMP	vtkBMPWriter	Write a BMP (.bmp) file.
WritePNG	vtkPNGWriter	Write a PNG (.png) file.
WritePNM	vtkPNMWriter	Write a PNM (.pnm) file.
WriteTIFF	vtkTIFFWriter	Write a TIFF (.tif) file.

Geometric Objects

Example Name	VTK Classes Demonstrated	Description
Cell3DDemonstration	vtkHexagonalPrism vtkHexahedron vtkPentagonalPrism vtkPolyhedron vtkPyramid vtkTetra vtkVoxel vtkWedge vtkUnstructuredGrid	Demonstrate the use of vtkCell3D to construct geometric objects. Sample objects are generated from the classes derived from vtkCell3D and displayed.
PolygonIntersection	vtkPolygon	Compute the intersection of a line segment with a polygon.
GeometricObjectsDemo		A demonstration of all geometric objects that work the same way.
Arrow	vtkArrowSource
Axes	vtkAxesActor
Colored Lines	vtkCellData vtkLine
Cone	vtkConeSource
Cube	vtkCubeSource
Cylinder	vtkCylinderSource
Disk	vtkDiskSource	A circle with a hole in it.
Dodecahedron	vtkPolyhedron	Create a dodecahedron using vtkPolyhedron
Frustum	vtkFrustumSource
Line	vtkLineSource
LongLine	vtkLine	Manually create a polyline
Hexahedron	vtkHexahedron
Oriented Arrow	vtkArrowSource	Orient an arrow along an arbitrary vector
Oriented Cylinder	vtkCylinderSource	Orient a cylinder along an arbitrary vector
Plane	vtkPlaneSource
Planes	vtkPlanes
PlanesIntersection	vtkPlanesIntersection
PlatonicSolid	vtkPlatonicSolidSource
Point	vtkPoints
Polyhedron	vtkPolyhedron
Polygon	vtkPolygon
Pyramid	vtkPyramid
PolyLine	vtkPolyLine
Quad	vtkQuad
Regular Polygon	vtkRegularPolygonSource
Sphere	vtkSphereSource
Triangle	vtkTriangle
Triangle strip	vtkTriangleStrip
Tetrahedron	vtkTetra
Vertex	vtkVertex

Parametric Objects

These examples demonstrate how to create an display one of the many vtkParametric* objects. All of the classes listed can be used in an identical fashion.

Example Name	VTK Classes Demonstrated	Description
ParametricObjects		Create and display a parametric object. Uncomment the object that you wish to be displayed.
ParametricObjectsDemo	vtkParametricBoy, vtkParametricConicSpiral, vtkParametricCrossCap, vtkParametricDini, vtkParametricEllipsoid, vtkParametricEnneper, vtkParametricFigure8Klein, vtkParametricKlein, vtkParametricMobius, vtkParametricRandomHills, vtkParametricRoman, vtkParametricSpline, vtkParametricSuperEllipsoid, vtkParametricSuperToroid, vtkParametricTorus	Demonstration of of the vtkParametric* classes added by Andrew Maclean. All the objects are displayed in a 4X4 array.
ParametricObjectsDemo2	vtkParametricBohemianDome, vtkParametricBour, vtkParametricCatalanMinimal, vtkParametricHenneberg, vtkParametricKuen, vtkParametricPluckerConoid, vtkParametricPseudosphere	Demonstration of additional vtkParametric* classes added by Tim Meehan. All the objects are displayed in a 4X2 array.
ParametricKuenDemo	vtkParametricKuen	Interactively change the parameters for a Kuen Surface.
ParametricSuperEllipsoidDemo	vtkParametricSuperEllipsoid	Interactively change the parameters for a SuperEllipsoid Surface.
ParametricSuperToroidDemo	vtkParametricSuperToroid	Interactively change the parameters for a SuperToroid Surface.

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Implicit Functions and Iso-surfaces

Example Name	VTK Classes Demonstrated	Description
IsoContours	vtkContourFunction	Visualize different isocontours using a slider.
SampleFunction	vtkSampleFunction	Sample and visualize an implicit function.
ExtractLargestIsosurface	vtkPolyDataConnectivityFilter	Extract largest isosurface.
BandedPolyDataContourFilter	vtkBandedPolyDataContourFilter	Create filled contours.
FilledContours	vtkContourFilter	Create filled contours (using vtkClipPolyData).
CutWithCutFunction	vtkCutter	Cut a surface with an implicit plane using vtkCutter.
CutWithScalars	vtkContourFilter	Cut a surface with scalars.
ImplicitSphere	vtkSphere	An implicit representation of a sphere.
MarchingCubes	vtkMarchingCubes	Create a voxelized sphere.
MarchingSquares	vtkMarchingSquares	Create a contour from a structured point set (image)

Working with 3D Data

Example Name	VTK Classes Demonstrated	Description
SelectionSource	vtkSelectionSource, vtkExtractSelection	Specify a selection.
WarpTo	vtkWarpTo	Bend an object.
CenterOfMass	CenterOfMass	Compute the center of mass of the points.
BooleanOperationPolyDataFilter	BooleanOperationPolyDataFilter	Perform boolean operations on two vtkPolyData objects.
DistancePolyDataFilter	DistancePolyDataFilter	Compute the distance function from one vtkPolyData to another.
ImplicitPolyDataDistance	ImplicitPolyDataDistance	Compute the distance function in a space around a vtkPolyData.
IntersectionPolyDataFilter	IntersectionPolyDataFilter	Compute the intersection of two vtkPolyData objects.
ShrinkPolyData	vtkShrinkPolyData	Move all items in a PolyData towards their centroid.
VectorFieldNonZeroExtraction	vtkExtractSelectedThresholds	Extract non-zero vectors from a vtkImageData.
MultiBlockMergeFilter	vtkMultiBlockMergeFilter, vtkMultiBlockDataSet	Combine MultiBlockDataSets.
IterateOverLines	vtkCellArray	Iterate through the lines of a PolyData.
AlignFrames	vtkLandmarkTransform	Align coordinate frames.
WarpVector	vtkWarpVector
FindAllArrayNames	vtkPolyData	Get the names of all of the data arrays.
PolyDataGetPoint	vtkPolyData	Get point locations/coordinates from a vtkPolyData.
NullPoint	vtkPointData	Set everything in PointData at a specified index to NULL
ContoursFromPolyData	vtkCutter	Create contours from PolyData.
ImplicitBoolean	vtkImplicitBoolean	Operations include intersection and union.
ConnectivityFilter	vtkConnectivityFilter	Color any dataset type based on connectivity.
AppendFilter	vtkAppendFilter	Append different types of data,
Perlin Noise	vtkPerlinNoise
Circle	vtkCutter	Create a circle by cutting through a sphere.
ProgrammableFilter	vtkProgrammableFilter	Create a custom filter without subclassing.
TransformPolyData	vtkTransformPolyDataFilter	Apply a Transformation to a PolyData.
CombinePolydata	vtkAppendPolyData	Combine/Append PolyData.
RuledSurfaceFilter	vtkRuledSurfaceFilter	Create a surface between lines.
CleanPolyData	vtkCleanPolyData	Remove coincident points.
CellPointNeighbors	vtkPolyData::GetCellNeighbors	Determine which cells share a single point with a specific cell.
CellEdgeNeighbors	vtkPolyData::GetCellNeighbors	Determine which cells share an edge with a specific cell.
PolyDataIsoLines	vtkBandedPolyDataContourFilter	Iso lines on the surface of a polydata
KMeansClustering	vtkKMeansStatistics	KMeans Clustering
PKMeansClustering	vtkPKMeansStatistics	Parallel KMeans Clustering.
WarpScalar	vtkWarpScalar	Move vertices along normals.
VertexConnectivity	vtkPolyData::GetCellPoints	Get a list of vertices attached (through an edge) to a vertex.
DeletePoint	vtkPoints, vtkPolyData
ThinPlateSplineTransform	vtkThinPlateSplineTransform
PointCellIds	vtkIdFilter	Generate point and cell id arrays.
Reflection	vtkReflectionFilter	Mirror a DataSet.
CellCenters	vtkCellCenters	Compute points at the center of every cell.
ExtractSelection	vtkExtractSelection	Extract selection points.
ExtractSelectedIds	vtkExtractSelectedIds	Extract selected points.
ExtractSelectionOriginalId	vtkExtractSelection	Extract selection and find correspondence between new and original Id.
ExtractSelectionCells	vtkExtractSelection	Extract selection cells.
ExtractCellsUsingPoints	vtkExtractSelection, vtkSelection, vtkSelectionNode	Extract points but bring cells that are still complete with them.
QuantizePolyDataPoints	vtkQuantizePolyDataPoints	Snap (quantize) points to a grid.
ReverseSense	vtkReverseSense	Flip normals.
PointsProjectedHull	vtkPointsProjectedHull	Convex hull of points projected onto the coordinate planes.
SCurveSpline	vtkSCurveSpline	Create an SCurve spline on a set of points.
KochanekSpline	vtkKochanekSpline	Create an Kochanek spline on a set of points.
ParametricSpline	vtkCardinalSpline, vtkParametricSpline, vtkParametricFunctionSource	Create a Cardinal spline on a set of points.
SelectVisiblePoints	vtkSelectVisiblePoints	Select visible points.
ExtractVisibleCells	vtkHardwareSelector	Extract and highlight visible cells.
Stripper	vtkStripper	Convert triangles to triangle strips.
DataSetSurfaceFilter	vtkDataSetSurfaceFilter	Convert vtkUnstructuredGrid to vtkPolyData.
GeometryFilter	vtkGeometryFilter	Convert vtkUnstructuredGrid to vtkPolyData (another way).
ImplicitModeller	vtkImplicitModeller	Compute the distance from an object to every point on a uniform grid.
TransformFilter	vtkTransformFilter	Transform a data set.
InterpolateTerrain	vtkProbeFilter	Here is a good explanation of what is going on.Interpolate terrain.
InterpolateMeshOnGrid	vtkProbeFilter	Interpolate a mesh over a grid.
PolyDataPointSampler	vtkPolyDataPointSampler	Sample the edges or surfaces of a polydata.
MaskPoints	vtkMaskPoints	Select a subset (mask) of a point set.
LinearExtrusion	vtkLinearExtrusionFilter	Extrude a shape.
RotationAroundLine	vtkTransform, vtkTransformPolyDataFilter	Rotation around a line.
ExtractOutsideSurface	vtkPolyDataConnectivityFilter	Extract the outer surface of a multiple surface polydata.
ContoursToSurface	vtkVoxelContoursToSurfaceFilter	Convert contours to a surface.
TubeFilter	vtkTubeFilter	Give lines a thickness (produce a cylinder around lines.
RibbonFilter	vtkRibbonFilter
ConvexHull_ShrinkWrap	vtkSmoothPolyDataFilter	Convex hull using shrink wrapping.
ConvexHull_vtkHull	vtkHull	Convex hull using vtkHull.
PointInsideObject	vtkSelectEnclosedPoints	Check if a point is inside an object.
PointInsideObject2	vtkDelaunay3D, vtkPolyData::FindCell	This uses a Delaunay triangulation to compute a volume. This gives more of an "is inside convex hull" effect than an "is inside object".
Data Bounds	vtkPolyData::GetBounds	Get the minimum and maximum value in each dimension. (Axis aligned bounding box)
TransformOrder	vtkTransformPolyDataFilter	Demonstrate how the order of applying transforms affects the result.
Outline	vtkOutlineFilter	Draw the bounding box of the data
TriangleArea	vtkTriangle::TriangleArea	Compute the area of all triangles in a polydata.
Silhouette	vtkPolyDataSilhouette
ThresholdingPoints	vtkThresholdPoints	Thresholding Points.
ThresholdingCells	vtkThreshold	Thresholding Cells.
ProcrustesAlignmentFilter	vtkProcrustesAlignmentFilter	Align point sets.
GradientFilter	vtkGradientFilter	Compute the gradient of a scalar field on a data set.
PolyDataToImageData	vtkPolyDataToImageStencil	Generate a binarized volume from a closed surface.
PolyDataContourToImageData	vtkLinearExtrusionFilter,vtkPolyDataToImageStencil	Generate a binarized image from a closed contour.
ExtractPolyLinesFromPolyData	vtkPolyData	Extract polylines from polydata.
FitSplineToCutterOutput	vtkKochanekSpline, vtkSplineFilter, vtkSpline	Fit a spline to cutter output.
MergePoints	vtkMergePoints	Remove duplicate (merge) points.
DecimatePolyline	vtkDecimatePolylineFilter	Decimate polyline.
FieldData	vtkFieldData	Add Global Miscellaneous Data (FieldData) to a Polydata.
PolyDataExtractNormals	vtkPolyDataNormals	Extract Normals from a Polydata.
DetermineArrayDataTypes	vtkPolyData	Determine data types of arrays.
EmbedPointsIntoVolume	vtkGaussianSplatter	Embed points into a volume.
CopyAllArrays	vtkPolyData	Copy all arrays from one vtkPolyData to another.
Colored Points	vtkUnsignedCharArray	Add three points to a polydata and associate a color with each of them.
TriangleColoredPoints	vtkUnsignedCharArray	Set the color of each point of a triangle. You will be able to interpolate the colors across the triangle.
TriangleSolidColor	vtkUnsignedCharArray	Create a solid colored triangle.
ColorCells	vtkLookupTable	Color individual cells of a polydata with scalar index.
ColorCellsWithRGB	vtkCellData	Color individual cells of a polydata with rgb colors.
PolyDataCellNormals	vtkCellData	Add/Get Normals to/from cells in a Polydata.
PolyDataPointNormals	vtkPointData	Add/Get Normals to/from points in a Polydata.
MiscPointData	vtkPointData, vtkFloatArray	Add Miscellaneous Data to Points in a Polydata.
GetMiscPointData	vtkDoubleArray	Get Miscellaneous Data from Points in a Polydata.
MiscCellData	vtkCellData	Add Miscellaneous Data to Cells in a Polydata.
GetMiscCellData	vtkCellData	Get Miscellaneous Data from Cells in a Polydata.
ExternalContour	vtkWindowToImageFilter, vtkContourFilter	Get the External Contour from Polydata.
TransformPipeline	vtkTransform	Combining the transformation, in order to manipulate a group of vtkActor. Shown in the example robot arm motion.
WarpSurface	vtkWarpVector	Warp a surface along its normal.
ProgrammableSource	vtkProgrammableSource	Create points using a programmable source. Generates points for a strange attractor.
ProjectSphere	vtkProjectSphereFilter	Unroll a sphere or spherical-like model.

Data Type Conversions

Example Name	VTK Classes Demonstrated	Description
PolyDataToUnstructuredGrid	vtkAppendFilter	Convert a vtkPolyData to a vtkUnstructuredGrid.

Point cloud operations

Example Name	VTK Classes Demonstrated	Description
ExtractSurface	vtkExtractSurface,vtkPCANormalEstimation,vtkSignedDistance	Create a surface from Unorganized Points using Point filters.
ExtractSurfaceDemo	vtkExtractSurface,vtkPCANormalEstimation,vtkSignedDistance	Create a surface from Unorganized Points using Point filters (DEMO).
PointSource	vtkPointSource	Generate a random point cloud.
DownsamplePointCloud	vtkCleanPolyData	Downsample a point cloud. Remove points so that there are no points within a tolerance of any point.
DensifyPoints	vtkDensifyPointCloudFilter	Add points to a point cloud.
ExtractCluster	vtkEuclideanClusterExtraction	From a set of randomly distributed spheres, extract connected clusters.
NormalEstimation	vtkPCANormalEstimation	Estimate the normals of a random points that lie on a sphere.
FitImplicitFunction	vtkFitImplicitFunction	Extract points within a distance to an implicit function.
SignedDistance	vtkSignedDistance	Compute signed distance to a point cloud.
UnsignedDistance	vtkUnsignedDistance	Compute unsigned distance to a point cloud.
PointOccupancy	vtkPointOccupancy	Show which voxels contain points.
RadiusOutlierRemoval	vtkRadiusOutlierRemoval	Remove outliers.
MaskPointsFilter	vtkMaskPointsFilter	Extract points within an image mask.
ExtractPointsDemo	vtkExtractPoints	Extract points inside an implicit function.

Working with Meshes

Example Name	VTK Classes Demonstrated	Description
AddCell	vtkPolyData	Add a cell to an existing mesh.
MatrixMathFilter	vtkMatrixMathFilter	Compute various quantities on cell and points in a mesh.
WeightedTransformFilter	vtkWeightedTransformFilter
GreedyTerrainDecimation	vtkGreedyTerrainDecimation	Create a mesh from an ImageData
LargestRegion	vtkPolyDataConnectivityFilter	Extract the largest connected region in a polydata.
SpecifiedRegion	vtkPolyDataConnectivityFilter	Extract a specific (specified) connected region in a polydata.
ColorDisconnectedRegions	vtkPolyDataConnectivityFilter	Color each disconnected region of a vtkPolyData a different color.
Curvatures	vtkCurvatures	Compute Gaussian, Mean, Min, and Max Curvatures.
MeshQuality	vtkMeshQuality
HighlightBadCells	vtkMeshQuality
PolygonalSurfaceContourLineInterpolator	vtkPolygonalSurfaceContourLineInterpolator	Interactively find the shortest path between two points on a mesh.
DijkstraGraphGeodesicPath	vtkDijkstraGraphGeodesicPath	Find the shortest path between two points on a mesh.
SelectPolyData	vtkSelectPolyData	Select a region of a mesh.
SmoothPolyDataFilter	vtkSmoothPolyDataFilter	Laplacian smoothing.
ClosedSurface	vtkFeatureEdges	Check if a surface is closed.
Decimation	vtkDecimatePro	Reduce the number of triangles in a mesh.
Deform a point set	vtkDeformPointSet	Deform a point set with a control polyhedra.
Decimation (quadric decimation)	vtkQuadricDecimation	Reduce the number of triangles in a mesh.
Decimation (quadric clustering)	vtkQuadricClustering	Reduce the number of triangles in a mesh.
Subdivision	vtkButterflySubdivisionFilter, vtkLoopSubdivisionFilter, vtkLinearSubdivisionFilter	Increase the number of triangles in a mesh.
BoundaryEdges	vtkFeatureEdges	Find the edges that are used by only one face.
FillHoles	vtkFillHolesFilter	Close holes in a mesh.
WindowedSincPolyDataFilter	vtkWindowedSincPolyDataFilter	Smooth a mesh (windowed sinc filter).
ColoredElevationMap	vtkLookupTable	Color a mesh by height.
ElevationFilter	vtkElevationFilter	Color a mesh by height.
SimpleElevationFilter	vtkSimpleElevationFilter	Color a mesh by dotting a vector from the origin to each point with a specified vector.
Triangluate	vtkTriangleFilter	Convert all polygons in a mesh to triangles.
ExtractEdges	vtkExtractEdges
CellEdges	vtkCell	Get edges of cells.
OBBDicer	vtkOBBDicer	Breakup a mesh into pieces.
SplitPolyData	vtkOBBDicer	Breakup a mesh into pieces sand save the pieces into files

Clipping

Example Name	VTK Classes Demonstrated	Description
GenericClip	vtkGenericClip,vtkBridgeDataSet, vtkGenericDataSet
SolidClip	vtkClipPolyData	Create a "solid" clip.
CapClip	vtkClipPolyData	Cap a clipped polydata with a polygon.
ClipClosedSurface	vtkClipClosedSurface	Clip a surface with multiple planes.
ImplicitDataSetClipping	vtkImplicitDataSet	Clip using an implicit data set.
ClipDataSetWithPolyData	vtkClipDataSet, vtkImplicitPolyDataDistance, vtkRectilinearGrid	Clip a vtkRectilinearGrid with arbitrary polydata. In this example, use a vtkConeSource to generate polydata to slice the grid, resulting in an unstructured grid. Contrast this with the next example.
TableBasedClipDataSetWithPolyData	vtkTableBasedClipDataSet, vtkImplicitPolyDataDistance, vtkRectilinearGrid	Clip a vtkRectilinearGrid with arbitrary polydata. In this example, use a vtkConeSource to generate polydata to slice the grid, resulting in an unstructured grid. Contrast this with the previous example.
BoxClipUnstructuredGrid	vtkBoxClipDataSet, vtkUnstructuredGrid	Clip a vtkUnstructuredGrid with a box. The results are unstructured grids with tetrahedra.
BoxClipStructuredPoints	vtkBoxClipDataSet, vtkStructuredPoints	Clip vtkStructuredPoints with a box. The results are unstructured grids with tetrahedra.

Working with Structured 3D Data

This section includes vtkImageData, vtkStructuredGrid, and vtkRectilinearGrid.

"ImageData" is not the traditional "flat, 2D image" you are used to. It is a special VTK data structure in the collection of 3D data structures provided by VTK. Here is an overview of these data structures: [1]. Image data can represent at typical 2D image, but also, a 3D volume.

• Demonstration of structured data types
• Get the linear point id of a point in a grid

vtkImageData

Example Name	VTK Classes Demonstrated	Description
GetCellCenter	vtkImageData	Get the coordinates of the center of a cell.
CellIdFromGridCoordinates	vtkStructuredData	Get the id of a cell from its grid coordinates.
IterateImageData	vtkImageData	Iterating over a vtkImageData.
ImageNormalize	vtkImageNormalize	Normalize an image.
ExtractVOI	vtkExtractVOI	Extract a volume of interest (subvolume).
ImageWeightedSum	vtkImageWeightedSum	Add two or more images.
ImageReslice	vtkImageReslice	Resize a vtkImageData.
ImageTranslateExtent	vtkImageTranslateExtent	Change the extent of a vtkImageData.
IntersectLine	vtkImageData	Intersect a line with all cells of a vtkImageData.
ImageIterator	vtkImageIterator

Conversions

Example Name	VTK Classes Demonstrated	Description
ImageDataGeometryFilter	vtkImageDataGeometryFilter	Convert a vtkImageData to a vtkPolyData
ImageDataToPointSet	vtkImageDataToPointSet	Convert a vtkImageData to a vtkStructuredGrid.

vtkStructuredGrid

Example Name	VTK Classes Demonstrated	Description
StructuredGrid	vtkStructuredGrid	Structured Grid.
VisualizeStructuredGrid	vtkStructuredGridGeometryFilter	Visualize the points of a structured grid.
OutlineStructuredGrid	vtkStructuredGridOutlineFilter	Visualize the outline of a structured grid.
VisualizeStructuredGridCells	vtkShrinkFilter	Visualize the cells of a structured grid.
BlankPoint	vtkStructuredGrid	Blank a point of a vtkStructuredGrid.

vtkStructuredPoints

Example Name	VTK Classes Demonstrated	Description
StructuredPointsToUnstructuredGrid	vtkStructuredPoints, vtkUnstructuredGrid	Convert a vtkStructuredPoints to a vtkUnstructuredGrid.

vtkRectilinearGrid

Example Name	VTK Classes Demonstrated	Description
RectilinearGrid	vtkRectilinearGrid	Rectilinear grid
VisualizeRectilinearGridCells	vtkRectilinearGrid, vtkShrinkFilter	Visualize the cells of a rectilinear grid
RectilinearGridToTetrahedra	vtkRectilinearGridToTetrahedra	Convert a vtkRectilinearGrid to a vtkUnstructuredGrid mesh

Registration

Example Name	VTK Classes Demonstrated	Description
IterativeClosestPointsTransform	vtkIterativeClosestPointTransform	Iterative Closest Points (ICP) Transform.
LandmarkTransform	vtkLandmarkTransform	Landmark Transform.

Medical

Example Name	VTK Classes Demonstrated	Description
MedicalDemo1	vtkMarchingCubes	Create a skin surface from volume data
MedicalDemo2	vtkMarchingCubes	Create a skin and bone surface from volume data
MedicalDemo3	vtkMarchingCubes	Create skin, bone and slices from volume data
MedicalDemo4	vtkFixedPointVolumeRayCastMapper	Create a volume rendering
TissueLens	vtkMarchingCubes vtkClipDataSet vtkProbeFilter	Cut a volume with a sphere

Surface reconstruction

Example Name	VTK Classes Demonstrated	Description
GaussianSplat	vtkGaussianSplatter	Create a surface from Unorganized Points (Gaussian Splat).
TriangulateTerrainMap	vtkDelaunay2D	Generate heights (z values) on a 10x10 grid (a terrain map) and then triangulate the points to form a surface.
GenerateCubesFromLabels	vtkMetaImageReader, vtkMaskFields	Create cubes from labeled volume data.
GenerateModelsFromLabels	vtkDiscreteMarchingCubes	Create models from labeled volume data (Discrete MarchingCubes).
Delaunay3D	vtkDelaunay3D	Create a solid mesh from Unorganized Points (Delaunay3D).
SurfaceFromUnorganizedPointsWithPostProc	vtkSurfaceReconstructionFilter	Create a surface from Unorganized Points (with post processing).
SurfaceFromUnorganizedPoints	vtkSurfaceReconstructionFilter	Create a surface from Unorganized Points.
ExtractSurface	vtkExtractSurface,vtkPCANormalEstimation,vtkSignedDistance	Create a surface from Unorganized Points using Point filters.
ExtractSurfaceDemo	vtkExtractSurface,vtkPCANormalEstimation,vtkSignedDistance	Create a surface from Unorganized Points using Point filters (DEMO).

Utilities

Example Name	VTK Classes Demonstrated	Description
Maximize/full screen a vtkRenderWindow	vtkRenderWindow
Reorder array values based on an ordering (key) array
Shallow copy a VTK object
Deep copy a VTK object
Capture the Z-buffer/depth buffer	vtkRenderer	zbuffer
Share a camera between multiple renderers	vtkRenderer, vtkCamera
Perform in-place operations on arrays	vtkArrayCalculator
File Output Window	vtkFileOutputWindow	Write errors to a log file instead of the screen.
Write a DenseArray or SparseArray to a file
Update the screen from inside an algorithm		Visual debugging
Get the frame rate of the rendering
Find the path of VTK_DATA_ROOT	vtkTesting
Find the location of a value in a vtkDataArray	vtkDataArray	vtkDataArray::LookupValue
Point inside polygon test	vtkPolygon	vtkPolygon::PointInPolygon
Bounding Box construction	vtkBoundingBox
Box intersection and Inside tests	vtkBoundingBox
Monitor a filters progress
Multiple Viewports	vtkRenderer::SetViewPort
Side by side viewports	vtkRenderer::SetViewPort
MultipleRenderWindows	vtkRenderWindow
Casting VTK objects	vtkObject::SafeDownCast
Concatenate two arrays	vtkConcatenateArray
Produce a random vector at each point in a dataset	vtkBrownianPoints
Mathematical vector class	vtkVector
Compute Principal Component Analysis (PCA) values	vtkPCAStatistics
Project 2D points onto the best 1D subspace (PCA Demo)	vtkPCAStatistics
Pass input along to output	vtkPassThrough
Convert a vtkDenseArray to a vtkTable	vtkArrayToTable
Cardinal spline Interpolation	vtkCardinalSpline
Shepard method interpolation	vtkShepardMethod
Timer log	vtkTimerLog
Time stamp	vtkTimeStamp
Subclass vtkCommand	vtkCommand	Instead of using a callback function, it is more powerful to subclass vtkCommand.
Interpolation using a piecewise function	vtkPiecewiseFunction
Convert between data types	vtkVariant
Coordinate system conversions	vtkCoordinate
Check VTK Version	vtkVersion
Catch errors and warnings	vtkCommand
Check VTK Version	Macro/#define's
Lookup Table Utilities	vtkLookupTable vtkColorSeries	A utility class for vtkLookupTable allowing you to output the table contents or to compare tables.
Color Lookup Table	vtkLookupTable
Color Transfer Function	vtkColorTransferFunction
Discretizable Color Transfer Function	vtkDiscretizableColorTransferFunction
Construct a Table	vtkTable	A table is a 2D array of any type of elements. They do not all have to be the same type. This is achieved using vtkVariant.
Delaunay Triangulation (2D)	vtkDelaunay2D	Perform a 2D Delaunay triangulation on a point set.
Constrained Delaunay Triangulation (2D)	vtkDelaunay2D	Perform a 2D Delaunay triangulation on a point set respecting a specified boundary.
Known Length Array	vtkFloatArray
Unknown Length Array	vtkFloatArray
Array of Vectors (Known Length)	vtkFloatArray
Array of Vectors (Unknown Length)	vtkFloatArray
Get the bounds of a vtkDenseArray	vtkDenseArray, vtkArrayRange
Get the bounds (min,max) of a vtk array	vtkFloatArray::GetRange	minimum, maximum
2D Array	vtkDenseArray
3D Array	vtkDenseArray
Sparse Array	vtkSparseArray
Custom type Dense (2D) Array	vtkDenseArray
Determine the type of a VTK variable	GetClassName()
Determine the type of an actor	vtkActor, vtkActorCollection
Screenshot	vtkWindowToImageFilter
FilenameFunctions	vtkDirectory, vtksys/SystemTools	Do things like get the file extension, strip the file extension, etc.
Timer	vtkRenderWindowInteractor::CreateRepeatingTimer
Off Screen Rendering	vtkImagingFactory, vtkGraphicsFactory
String function parser	vtkFunctionParser
Catch the camera modified event	vtkCameraWindow
Catch the window modified event	vtkRenderWindow
Extract a component of an array	vtkArrayCalculator

CMake Techniques

Example Name	VTK Classes Demonstrated	Description
Check if a specific module is present
Check VTK Version in CMake

Math Operations

Example Name	VTK Classes Demonstrated	Description
LUFactorization	vtkMath	LU Factorization.
NormalizeVector	vtkMath	Normalize a vector.
VectorDot	vtkVectorDot
PowerWeighting	vtkPowerWeighting	Raise all elements in an array to a power.
LeastSquares	vtkMath::SolveLeastSquares	Least Squares.
HomogeneousLeastSquares	vtkMath::SolveHomogeneousLeastSquares	Homogeneous Least Squares.
EigenSymmetric	vtkMath::Jacobi	Compute eigenvalues and eigenvectors of a symmetric matrix.
MatrixTranspose	vtkMatrix3x3	Matrix transpose.
MatrixInverse	vtkMatrix3x3	Matrix inverse.
PerpendicularVector	vtkMath::Perpendiculars	Get a vector perpendicular to another vector.
VectorNorm	vtkVectorNorm	Get the lengths of an array of vectors.
Interpolate1D	vtkTupleInterpolator vtkCardinalSpline vtkKochanekSpline	A simple example demonstrating how functions defined by sparsely distributed supporting points can be interpolated at arbitrary positions.

Graphs

Example Name	VTK Classes Demonstrated	Description
Convert an adjacency matrix to an edge table	vtkAdjacencyMatrixToEdgeTable
Find the shortest path on a graph	vtkDijkstraGraphGeodesicPath
Set the color of vertex labels	vtkGraphLayoutView, vtkRenderedGraphRepresentation
Set the size of vertices	vtkGraphLayoutView, vtkRenderedGraphRepresentation	Vertex size.
Size/scale vertices based on a data array	vtkGraphLayoutView, vtkRenderedGraphRepresentation
Get a list of selected vertices and edges	vtkAnnotationLink
Get a list of selected vertices and edges using an observer of AnnotationChangedEvent	vtkAnnotationLink
Manually set coordinates of vertices in a graph	vtkGraph::SetPoints, vtkPassThroughLayoutStrategy
Create either a vtkMutableDirectedGraph or vtkMutableUndirectedGraph	vtkMutableGraphHelper
Display two graphs side by side	vtkGraphLayoutView
Get all vertices connected to a specified vertex	vtkAdjacentVertexIterator
Edge weights	vtkGraph::GetEdgeData::AddArray
Iterate over edges	vtkEdgeListIterator
Iterate over edges incoming to a vertex	vtkInEdgeIterator
Iterate over edges outgoing from a vertex	vtkOutEdgeIterator
Breadth first search tree	vtkBoostBreadthFirstSearchTree	Can also be used to convert a graph to a tree
Distance from origin	vtkBoostBreadthFirstSearch
Color vertices	vtkGraphLayoutView
Color edges	vtkGraphLayoutView
Construct a graph	vtkMutableUndirectedGraph
Construct a tree	vtkTree, vtkMutableDirectedGraph
Minimum spanning tree of a graph	vtkBoostPrimMinimumSpanningTree
Depth First Search iterator	vtkTreeDFSIterator
Breadth First Search iterator	vtkTreeBFSIterator
Visualize a graph	vtkGraphLayoutView, vtkGraphLayoutStrategy, vtkSimple2DLayoutStrategy
Create a graph & visualize it in ParaView/VisIt	vtkUnstructuredGrid, vtkXMLUnstructuredGridWriter, vtkPolyLine
Label vertices and edges	vtkGraphLayoutView::SetEdgeLabelArrayName, vtkGraphLayoutView::SetVertexLabelArrayName
Find connected components of a graph	vtkBoostConnectedComponents
Convert a graph to a PolyData	vtkGraphToPolyData
Visualize a directed graph	vtkGlyphSource2D
Create a random graph	vtkRandomGraphSource
Depth First Search Animation	vtkTreeDFSIterator
Remove vertices of degree 0 from a vtkGraph	vtkRemoveIsolatedVertices

Graph Conversions

Example Name	VTK Classes Demonstrated	Description
MutableDirectedGraphToDirectedGraph	vtkMutableDirectedGraph, vtkDirectedGraph	vtkMutableDirectedGraph to vtkDirectedGraph.
DirectedGraphToMutableDirectedGraph	vtkMutableDirectedGraph, vtkDirectedGraph	vtkDirectedGraph to vtkMutableDirectedGraph.
TreeToMutableDirectedGraph	vtkMutableDirectedGraph, vtkTree	vtkTree to vtkMutableDirectedGraph

Graph Conversions That Don't Work

Example Name	VTK Classes Demonstrated	Description
vtkMutableDirectedGraph to vtkMutableUndirectedGraph	vtkMutableDirectedGraph, vtkMutableUndirectedGraph
vtkMutableUndirectedGraph to vtkMutableDirectedGraph	vtkMutableDirectedGraph, vtkMutableUndirectedGraph
vtkTree to vtkMutableUndirectedGraph	vtkTree, vtkMutableUndirectedGraph

Data Structures

Example Name	VTK Classes Demonstrated	Description
AttachAttributes	vtkInformation	Attach attributes to a VTK array
Radius	vtkPointLocator	Find all points within a radius of a specified point.
CellLocatorVisualization	vtkCellLocator	Visualization of the tree of a vtkCellLocator.
PointLocatorVisualization	vtkPointLocator	Visualization of the tree of a vtkPointLocator.
PointLocator	vtkPointLocator	Efficient 3D point query.
CellLocator	vtkCellLocator	Project a point onto a mesh. Closest point on a mesh.Efficient 3D cell query.
CellTreeLocator	vtkCellTreeLocator	Points inside an object using vtkCellTreeLocator.

Timing Demonstrations

Example Name	VTK Classes Demonstrated	Description
OctreeTimingDemo	vtkOctreePointLocator	Plot the runtime vs MaxPointsPerRegionOctree timing demo.
KDTreeTimingDemo	vtkKdTreePointLocator	Plot the runtime vs MaxLevel (doesn't seem correct)
OBBTreeTimingDemo	vtkOBBTree	Plot the runtime vs MaxLevel
ModifiedBSPTreeTimingDemo	vtkModifiedBSPTree	Plot the runtime vs MaxLevel

KD-Tree

Example Name	VTK Classes Demonstrated	Description
ClosestPoint	vtkKdTree
ClosestKPoints	vtkKdTree
AccessPoints	vtkKdTree	Access the points of a KDTree.
ClosestPoint	vtkKdTreePointLocator	Find the closest point to a query point.
ClosestNPoints	vtkKdTreePointLocator	Find the closest N points to a query point.
VisualizeKDTree	vtkKdTreePointLocator	Visualize levels of the tree.
FindPointsWithinRadius	vtkKdTreePointLocator	Find points within a specified radius of a query point.
DataStructureComparison	vtkKdTree, vtkOBBTree, vtkOctreePointLocator, vtkModifiedBSPTree	Illustrates, side by side, the differences between several spatial data structures

Oriented Bounding Box (OBB) Tree

Example Name	VTK Classes Demonstrated	Description
IntersectWithLine	vtkOBBTree	Intersect a line with a vtkOBBTree.
OBBTreeExtractCells	vtkOBBTree	Intersect a line with an OBB Tree and display all intersected cells.
VisualizeOBBTree	vtkOBBTree	Visualize levels of the tree.

Octree

Example Name	VTK Classes Demonstrated	Description
BuildTree	vtkOctreePointLocator	Create an octree.
ClosestPoint	vtkOctreePointLocator	Find the closest point to a query point.
KClosestPoints	vtkOctreePointLocator	Find the K closest points to a query point.
FindPointsWithinRadius	vtkOctreePointLocator	Find the points within a sphere of specified radius to a query point.
OctreeVisualize	vtkOctreePointLocator	Visualize levels of the tree.
IncrementalOctreePointLocator	vtkIncrementalOctreePointLocator	Insert points into an octree without rebuilding it.

Modified BSP Tree

Example Name	VTK Classes Demonstrated	Description
ModifiedBSPTreeIntersectWithLine	vtkModifiedBSPTree	Intersect a line with a modified BSP Tree.
ModifiedBSPTreeExtractCells	vtkModifiedBSPTree	Intersect a line with a modified BSP Tree and display all intersected cells.
VisualizeModifiedBSPTree	vtkModifiedBSPTree	Visualize levels of the tree.

VTK Concepts

Example Name	VTK Classes Demonstrated	Description
Scalars		Attach a scalar value to each point (PointData) or cell (CellData) in a data set.

Lighting

Example Name	VTK Classes Demonstrated	Description
Create shadows	vtkShadowMapPass
Add a directional light to a scene	vtkLight
Display the location and direction of a light	vtkLightActor

Visualization

See this tutorial for a brief explanation of the VTK terminology of mappers, actors, etc.

Example Name	VTK Classes Demonstrated	Description
Assign colors to cells in a vtkPolyData structure using lookup tables.	vtkNamedColors, vtkPlaneSource, vtkLookupTable, vtkColorTransferFunction	Demonstrates how to assign colors to cells in a vtkPolyData structure using lookup tables.
Generate a surface and color by elevation bands using arrows for glyphing normals.	vtkBandedPolyDataContourFilter, vtkLookupTable, vtkColorSeries, vtkGlyph3D	Demonstrates the coloring of a surface by partitioning the elevation into bands and using arrows to display the normals on the surface.
Generate a surface and color by curvature bands using arrows for glyphing normals.	vtkCurvatures, vtkBandedPolyDataContourFilter, vtkLookupTable, vtkColorSeries, vtkGlyph3D	Demonstrates the coloring of a surface by partitioning the gaussian curvature of a surface into bands and using arrows to display the normals on the surface.
Layered renderers	vtkRenderer
Switch between coloring the actor and coloring the data	vtkDataSetMapper	ScalarVisibility, color
Display an image in 2D	vtkImageMapper
Use a texture for the background of a vtkRenderer	vtkRenderer, vtkTexture	Background texture, BackgroundTexture
Visualize a vector field	vtkGlyph3D
Orientation of the view of an image	vtkInteractorStyleImage
Draw a caption/bubble pointing to a particular point	CaptionActor2D
Determine the display order of a stack of images	vtkRenderer
Render into an existing OpenGL Context	vtkRenderPass,vtkVolumetricPass
Set transparency of image pixels	vtkImageData
Create oriented glyphs from vector data	vtkGlyph3D
Create oriented lines (hedgehogs) from vector data	vtkHedgeHog, vtkStructuredGrid
Change the width/thickness of lines in an actor	vtkActor, vtkProperty
Change the shape of the cursor	vtkRenderWindow
Get the bounds of the whole scene	vtkRenderer
Convolve a splat image with every point in an input image	vtkFastSplatter
Create tubes with varying radius and colors	vtkTubeFilter
Create tubes from interpolated points and scalars	vtkTubeFilter, vtkParametricFunctionSource vtkTupleInterpolator
vtkGlyph2D	vtkGlyph2D
vtkGlyph3D	vtkGlyph3D
Add a vertex to each point	vtkVertexGlyphFilter
vtkCutter	vtkCutter
Display a quadratic surface	vtkQuadric
Backface culling	vtkActor::GetProperty::BackfaceCullingOn
Background color	vtkRenderer::SetBackground
Background gradient	vtkRenderer::GradientBackgroundOn, vtkRenderer::Setbackground2
CameraActor	vtkCameraActor	Visualize a camera (frustum) in a scene.
Generate 3D clip art from an image	vtkTextureMapToPlane
Close a render window	vtkRenderWindowInteractor::TerminateApp, vtkRenderWindow::Finalize
Color an Actor	vtkActor::GetProperty::SetColor
Color the edges of an Actor	vtkActor::GetProperty::SetEdgeColor
Color glyphs	vtkGlyph3D vtkGlyph3D::SetColorModeToColorByScalar
Corner annotation	vtkCornerAnnotation	Write text in the corners of a window.
Correctly Rendering Translucent Geometry	vtkDepthSortPolyData
Display three orthogonal axes with labels	vtkCubeAxesActor
Display three orthogonal axes with labels	vtkCubeAxesActor2D	This example uses the vtkCubeAxesActor2D to show your scene with axes to indicate the spatial extent of your data.
vtkCursor3D	vtkCursor3D
Track a 3D cursor	vtkPointWidget
Display coordinate axes	vtkOrientationMarkerWidget
Display Text	vtkTextActor, vtkTextProperty
A little bit easier rendering	vtkRenderView
FlatShading	vtkActor::GetProperty::SetInterpolationToFlat
Draw text that stays right side up	vtkFollower
Hide an actor	vtkPropCollection, vtkProp::VisibilityOff	visible
Hide all actors	vtkRenderer::RemoveAllViewProps
Level of detail rendering	vtkLODProp3D
Label Contours	vtkLabeledDataMapper
Label Mesh	vtkLabeledDataMapper
Label points	vtkPointSetToLabelHierarchy, vtkLabelPlacementMapper	Display a non-overlapping text label at each point.
Display the point ID at each point	vtkLabeledDataMapper
Legend	vtkLegendBoxActor
Display the scale of a scene	vtkLegendScaleActor
Movable axes	vtkFollower, vtkAxesActor, vtkAssembly
Moving an Actor	vtkInteractorStyleTrackballActor
Moving the Camera	vtkInteractorStyleTrackballCamera
Multiple Actors	vtkActor
Named colors	vtkNamedColors	Demonstrates how to use the vtkNamedColor class
Named color patches	vtkNamedColors	Creates a HTML file called VTKNamedColorPatches.html showing the available colors in vtkNamedColors.
NoShading	vtkActor::GetProperty::SetAmbient, vtkActor::GetProperty::SetDiffuse, vtkActor::GetProperty::SetSpecular
Opacity	vtkActor::GetProperty::SetOpacity	Transparency, transparent.
PointSize	vtkActor::GetProperty::SetPointSize
Poly Data Depth Sorting	vtkDepthSortPolyData
Automatic level of detail adjustment	vtkQuadricLODActor	Level of detail adjustment.
Render a large image, larger than a window	vtkRenderLargeImage
Rotate an Actor	vtkActor::GetMatrix
ScalarBarActor	vtkScalarBarActor	Display a color bar.
Scale glyphs	vtkGlyph3D vtkGlyph3D::SetScaleModeToScaleByScalar
Select a region of a window	vtkInteractorStyleRubberBand2D
Stream Lines	vtkStreamLine
Display text	vtkTextSource
Texture map an ImageData	vtkImageCanvasSource2D
Texture map a plane	vtkTextureMapToPlane
Texture map a quad	vtkPolygon, vtkPolyData::GetPointData::SetTCoords
Transform an Actor	vtkActor::SetUserTransform
Transform an actor collection	vtkActorCollection
Multiple Actors in a Vector	vtkActor
Display high resolution text	vtkVectorText
Visualize a 2D Set of Points	vtkPolyDataMapper2D, vtkProperty2D
Visualize the points of an ImageData	vtkDataSetMapper
Visualize a VTP File	vtkXMLPolyDataReader, vtkPolyDataMapper
Change the size of a window	vtkRenderWindow:SetSize
Change the title of a window	vtkRenderWindow::SetWindowName
Wireframe	vtkActor::GetProperty::SetRepresentationToWireframe
Positioning and aiming the camera	vtkCamera
Display Quadratic Surfaces	vtkQuadric, vtkSampleFunction, vtkContourFilter
Glyph3DMapper	vtkGlyph3DMapper
DistanceToCamera	vtkDistanceToCamera
Generate a custom glyph at each point	vtkProgrammableGlyphFilter
Sample a volume with a curved surface	vtkProbeFilter	In medical imaging, this is often called curved multi planar reformation
Sample a volume with an isosurface	vtkProbeFilter	Demonstrates how to create point data on an isosurface.
Accessing the source of an actor reversely	vtkActor	Demonstrates how to access the source (e.g. vtkSphereSource) of an actor reversely
Probe a data set with random points	vtkProbeFilter	Demonstrates how to probe a dataset with random points and select points inside the data set
vtkTensorGlyph	vtkTensorGlyph	Draw a rotated/scaled glyph at each point.
KochSnowflake	vtkPolyData, vtkPolyLine, vtkTriangle, vtkLookupTable,	Use recursion to represent a Koch snowflake fractal.
FindCellIntersections	vtkCellLocator	Find the intersection of a line and the cells in an unstructured dataset
BillboardTextActor3D	vtkBillboardTextActor3D	Label points with billboards.

Volume Rendering

Example Name	VTK Classes Demonstrated	Description
HAVS	vtkHAVSVolumeMapper
Smart volume mapper	vtkSmartVolumeMapper
Min intensity rendering	vtkFixedPointVolumeRayCastMapper
ITK->VTK conversion		Conversion maintaining DICOM orientation and position

User Interaction

Example Name	VTK Classes Demonstrated	Description
Move a cube into a sphere	vtkInteractorStyleTrackballActor	Snap
Create, invoke, and handle a custom event		Simple observer, emit
Handle events in class member functions		Set observers to be class member functions.
Click and drag a vertex of a vtkPolyData	vtkPointPicker
Click and drag a vertex of a vtkUnstructuredGrid	vtkPointPicker
Give an observer access to an object (via ClientData)	vtkCommand
Pass an observer a value (via CallData)	vtkCommand
Drag a glyph around	vtkGlyph3D
Picking	vtkPropPicker	Get the world coordinate of the mouse click (if you clicked an actor)
Disallow interaction with a specific actor	vtkActor::PickableOff
Assembly	vtkAssembly	Combine/group actors into an assembly.
Catch a double click	vtkInteractorStyleTrackballCamera
vtkImageClip	vtkImageClip	Demonstrates how to interactively select and display a region of an image.
Select a region of an image	vtkCommand
Terrain mode	vtkInteractorStyleTerrain
Handle keypress events	vtkInteractorStyleTrackballCamera
Handle keypress events (lightweight)	vtkCallbackCommand	This uses a callback function rather than a derived interactor class.
InteractorStyleUser	vtkInteractorStyleUser	Create a completely custom interactor style (no default functionality is provided)
Handle mouse events	vtkInteractorStyleTrackballCamera	Subclass the interactor style.
Handle mouse events (light weight)	vtkCallbackCommand	Use an observer.
Get the coordinates of the closest point in the data set to the mouse click	vtkPointPicker
RubberBand2D Observer	vtkInteractorStyleRubberBand2D
RubberBand2D	vtkInteractorStyleRubberBand2D
RubberBand3D	vtkInteractorStyleRubberBand3D
RubberBandPick	vtkInteractorStyleRubberBandPick
RubberBandZoom	vtkInteractorStyleRubberBandZoom
Select an actor	vtkPropPicker
Check if shift or control is being held	vtkRenderWindowInteractor::GetControlKey()	Hold/holding down a key
Choose between multiple interaction modes	vtkInteractorStyleSwitch
Trackball actor mode	vtkInteractorStyleTrackballActor
Trackball camera mode	vtkInteractorStyleTrackballCamera
Get world coordinates of mouse click	vtkWorldPointPicker
Cell Picking	vtkCellPicker	select cell, click cell
Area Picking	vtkAreaPicker
Highlight Selected Points	vtkExtractGeometry
Highlight selection	vtkExtractPolyDataGeometry
Highlight a picked actor	vtkPropPicker

Working with Images

Example Name	VTK Classes Demonstrated	Description
Export an image to a C array	vtkImageExport	c-style
Import an image from a C array	vtkImageImport	c-style
Median filter a 3d or 2d image	vtkImageMedian3D	Median filter
Inverse FFT	vtkImageRFFT
High pass filter an image	vtkImageIdealHighPass
Remove small patches from an image	vtkImageIslandRemoval2D
Setup the camera to fill the window with an image	vtkCamera	Fit image
Shift and scale an image	vtkImageShiftScale
Copy one image into another image	vtkImageStencil, vtkImageToImageStencil
Display layers of images	vtkImageStack
Set the size of border pixels	vtkImageSliceMapper
Set the interpolation type for the display of an image	vtkImageSlice, vtkImageProperty	If pixels look blurry instead of sharp when zoomed in, change this.
Draw text in an image	vtkFreeTypeUtilities, vtkImageBlend
Convolve a separable kernel with an image	vtkImageSeparableConvolution
Median filter an image	vtkImageHybridMedian2D
Dilate or erode an image	vtkImageDilateErode3D
Open or close (morphologically) an image	vtkImageOpenClose3D
Replace every pixel with the range of its neighbors according to a kernel	vtkImageRange3D
Convert a vtkImageData to a vtkPolyData	vtkImageToPolyDataFilter, vtkImageQuantizeRGBToIndex
Compute the Manhattan distance from every point to every black point in a binary image	vtkImageCityBlockDistance
Perform Canny edge detection on an image
Convert a vtkImageData to a vtkStructuredPoints	vtkImageToStructuredPoints
Find peaks in an image using non maximum suppression	vtkImageNonMaximumSuppression
Make part of an image transparent	vtkImageMapToColors, vtkLookupTable	Transparency
RTAnalyticSource	vtkRTAnalyticSource	An image source that can be used for regression testing
Create a Mandelbrot image	vtkImageMandelbrotSource
Stretch an image	vtkImageMagnify	Supersample and stretch an image.
Create a image of a grid	vtkImageGridSource
Create a sinusoidal image	vtkImageSinusoidSource
2D actor and mapper	vtkActor2D vtkMapper2D
Cast an image to a different type	vtkImageCast
Extract components of an image	vtkImageExtractComponents	This can be used to get, for example, the red channel of an image.
Display a greyscale histogram	vtkImageAccumulate, vtkBarChartActor	grayscale
Display an image as the background of a scene	vtkImageCanvasSource2D
Display a static image	vvtkImageViewer2	This will display the image, but not allow you to interact with it.
Image dot product	vtkImageDotProduct	Compute the pixel-wise dot product of two vector images.
Drawing on an image	vtkImageCanvasSource2D
Drawing shapes in an image	vtkImageCanvasSource2D
Mask a region of an image	vtkImageMask
Perform mathematical operations on an image	vtkImageMathematics
vtkImageMirrorPad	vtkImageMirrorPad	Pad the edges of an extended image by mirror existing pixels.
Visualize and interact with an image	vtkImageActor, vtkInteractorStyleImage
Visualize and interact with an image	vtkImageSlice, vtkImageSliceMapper	This is the new way to do this. It is much more powerful.
Visualize and interact with an image	vtkImageSlice, vtkImageResliceMapper	This is even more powerful than vtkImageSliceMapper. It can also do oblique slices.
Rotate a 2D image	vtkImageSlice, vtkImageResliceMapper	This is even more powerful than vtkImageSliceMapper. It can also do oblique slices.
Negative Indices	vtkImageData	A very powerful feature of vtkImageData is that you can use negative indices.
Picking a pixel 2 - modified version for exact pixel values	vtkPropPicker
Picking a pixel	vtkPropPicker
Mark keypoints in an image	vtkVectorText, vtkFollower
Visually Compare Two Images	vtkImageCheckerboard
Threshold an image	vtkImageThreshold

Image Processing

Example Name	VTK Classes Demonstrated	Description
RescaleAnImage	vtkImageShiftScale	Rescale an image
vtkImageAccumulate	vtkImageAccumulate	Histogram
Get the range of image pixel values (min/max)	vtkImageData	minimum, maximum
Anisotropic diffusion (2D)	vtkImageAnisotropicDiffusion2D
Blending 2D images with different color maps	vtkImageMapToColors
Center an image	vtkImageChangeInformation
Combine two images	vtkImageBlend
Combine layers into an RGB image	vtkImageAppendComponents
Convert RGB image to greyscale	vtkImageMagnitude	grayscale
Compute the difference image of two images	vtkImageDifference
Convert RGB image to greyscale (luminance)	vtkImageLuminance	grayscale
Convert greyscale image to RGB	vtkImageMapToColors	Use a lookup table to map scalar (grayscale) values to colors
Flip an image	vtkImageFlip
Image gradient	vtkImageGradient	Compute the gradient vector at every pixel.
Dilate an image	vtkImageContinuousDilate3D
Erode an image	vtkImageContinuousErode3D
Convolve an image with a kernel	vtkImageConvolve	Convolution
Correlate two images	vtkImageCorrelation
Divergence of a vector field	vtkImageDivergence
Create an image of an ellipsoid	vtkImageEllipsoidSource
Compute the FFT of an image	vtkImageFFT
Smooth an image	vtkImageGaussianSmooth
Compute the magnitude of the gradient at each pixel of an image	vtkImageGradientMagnitude
Compute the Laplacian of an image	vtkImageLaplacian
Create an image of noise	vtkImageNoiseSource
Switch axes of an image	vtkImagePermute
Resample an image	vtkImageShrink3D
Sobel edge detection 2D	vtkImageSobel2D
Variance of a 3D image	vtkImageVariance3D	Construct a new image consisting of the variance of the input image at each pixel.
Convert RGB to HSV	vtkImageRGBToHSV
Resize an image	vtkImageResize vtkImageSincInterpolator	Resize an image using a sinc interpolator

Widgets

Example Name	VTK Classes Demonstrated	Description
PointWidget	vtkPointWidget
SeedWidgetImage	vtkImageViewer2, vtkSeedWidget	How to start the interaction?
Interact with a plane	vtkPlaneWidget
Apply an affine transformation interactively	vtkAffineWidget
vtkPolygonalSurfacePointPlacer	vtkPolygonalSurfacePointPlacer	Used in conjuntion with vtkContourWidget to draw curves on a surface.
Sphere widget events	vtkSphereWidget
Draw movable text	vtkTextWidget
Seed widget	vtkSeedWidget
Sphere widget	vtkSphereWidget
vtkSphereWidget2	vtkSphereWidget2
vtkSplineWidget	vtkSplineWidget
vtkBorderWidget	vtkBorderWidget	2D selection, 2D box.
vtkBorderWidget	vtkBorderWidget	2D selection box in world coordinates.
vtkAngleWidget	vtkAngleWidget
vtkAngleWidget + vtkAngleRepresentation2D	vtkAngleWidget, vtkAngleRepresentation2D
vtkCaptionWidget	vtkCaptionWidget
3D Slider	vtkSliderWidget, vtkSliderRepresentation3D
2D Slider	vtkSliderWidget, vtkSliderRepresentation2D
Balloon	vtkBalloonWidget
Contour Widget	vtkContourWidget	Create a contour from a set of points and dynamically change the contour using the points as control points.
vtkDistanceWidget	vtkDistanceWidget
vtkImplicitPlaneWidget2	vtkImplicitPlaneWidget2	Clip polydata with an implicit plane.
vtkBoxWidget	vtkBoxWidget
vtkBoxWidget2	vtkBoxWidget2
vtkLineWidget2	vtkLineWidget2
vtkBiDimensionalWidget	vtkBiDimensionalWidget	When would you use this?
vtkImagePlaneWidget	vtkImagePlaneWidget
vtkImageTracerWidget	vtkImageTracerWidget	Scribble on an image.
vtkImageTracerWidget	vtkImageTracerWidget	Highlight pixels inside a non-regular region scribbled on an image.
Draw on a non-planar surface	vtkImageTracerWidget
vtkHoverWidget	vtkHoverWidget	How to detect a hover?
Logo widget	vtkLogoWidget
Orientation Marker widget	vtkOrientationMarkerWidget	Display a polydata as an orientation icon.
Rectilinear Wipe widget	vtkImageRectilinearWipe, vtkRectilinearWipeWidget, vtkRectilinearWipeRepresentation	Compare two images.
Checkerboard widget	vtkCheckerboardWidget, vtkCheckerboardRepresentation	Compare two images using a checkerboard.
vtkCursor2D	vtkCursor2D
ButtonWidget	vtkButtonWidget,vtkTexturedButtonRepresentation2D	Create a textured 2D button

Plotting

Example Name	VTK Classes Demonstrated	Description
Box plot	vtkChartBox
Line plot	vtkChartXY
Scatter plot	vtkPlotPoints
Bar chart	vtkChartXY
Pie chart	vtkChartPie, vtkPlotPie
Parallel coordinates	vtkChartParallelCoordinates
Stacked bar	vtkPlotBar
Stacked plot	vtkPlotStacked
Diagram

Animation

Example Name	VTK Classes Demonstrated	Description
Animate actors	vtkAnimationScene, vtkAnimationCue
Animation	vtkRenderWindowInteractor::CreateRepeatingTimer	Move a sphere across a scene.
Animation (the right way)	vtkAnimationScene, vtkAnimationCue	Zoom in on a sphere.
Data Animation	vtkCallbackCommand, vtkProgrammableFilter	Update points in a dataset every specified interval.
Data Animation (subclass)	vtkCommand, vtkProgrammableFilter	Update points in a dataset every specified interval (using a vtkCommand subclass instead of a callback function.

Geographic Visualization (Geovis)

Example Name	VTK Classes Demonstrated	Description
Compass Widget	vtkCompassWidget
Earth source	vtkEarthSource	Create the Earth.
Convert lat/long coordinates to world coordinates	vtkGeoAssignCoordinates

Information Visualization (Infovis)

Example Name	VTK Classes Demonstrated	Description
Parallel coordinates	vtkParallelCoordinatesView
Tree map	vtkTreeMapView

Qt

Click here for a tutorial on how to setup Qt.

Example Name	VTK Classes Demonstrated	Description
Convert a QImage to a vtkImageData	vtkQImageToImageSource
ShowEvent		Use QMainWindow::showEvent event to do things that you might want to do in the constructor
Render window without a .ui file	QVTKWidget	This is a very basic example that shows how to create a Qt window. Typically, one would want to design a form in the QtDesigner (this is shown in RenderWindowUi)
Render window with a .ui (single inheritance)	QMainWindow	Using a QVTKWidget with the Qt Single Inheritance model
Render window with a .ui (multiple inheritance)	QMainWindow	Using a QVTKWidget with the Qt Multiple Inheritance model
Side by side render windows	QApplication
vtkQtBarChart	vtkQtBarChart
Border Widget	vtkBorderWidget, QApplication
Connect a VTK event to a Qt slot	vtkEventQtSlotConnect
Convert a vtkImageData to a QImage
Share the camera between QVTKWidgets

Matlab

You must turn on VTK_USE_MATLAB_MEX to use these.

Example Name	VTK Classes Demonstrated	Description
vtkMatlabEngineFilter	vtkMatlabEngineFilter

Databases

SQL

If you have any trouble or errors with the following examples, please troubleshoot using these instructions.

Example Name	VTK Classes Demonstrated	Description
Connect to and read a MySQL database	vtkMySQLDatabase, vtkSQLQuery
Create a MySQL database	vtkMySQLDatabase
Write to a MySQL database	vtkSQLQuery, vtkMySQLDatabase

RenderMan

RenderMan is a high quality rendering system create by Pixar. VTK can export RenderMan RIB files for rendering by prman. In the spring of 2015, Pixar released a non-commercial version of its RenderMan products.

Example Name	VTK Classes Demonstrated	Description
Apply a RenderMan Shader to a PolyData	vtkRIBExporter

Remote Modules

Remote modules are user contributed code that is not distributed with VTK. A description of a remote module and the location of its repository is listed in the VTK/Remote directory with the extension .remote.cmake. Once enabled, a remote module is treated like any other VTK module. Each of the remote module examples describes how to enable the example. More information about remote modules is here.

Example Name	VTK Classes Demonstrated	Description
Compute tangent and normal vectors to a polyline	vtkFrenetSerretFrame
Interactively compute tangent and normal vectors to a polyline	vtkFrenetSerretFrame	Uses vtkSplineWidget to interact with a spline. Shows how to control a pipeline inside a callback.

Broken/Missing Examples (Please write/fix me!)

Some of these are simply shells waiting for a good example. Some of these have a specific problem that is noted. Please help improve them!

Testing Needed

Example Name	VTK Classes Demonstrated	Description
AVI (Windows only)	vtkAVIWriter	Someone please test this.
OggTheora	vtkOggTheoraWriter	Can't find lvtkoggtheora
MPEG2	vtkMPEG2Writer	CMake won't find MPEG2 include?
FFMPEG	vtkFFMPEGWriter	CMake won't find FFMPEG include?
Display a histogram	vtkImageAccumulate, vtkBarChartActor	Testing images seem to vary slightly on different machines.

Small Problems

Example Name	VTK Classes Demonstrated	Description
Interact/move the vertices of a graph	vtkGraph
Read an mdb Access database file	vtkODBCDatabase	Error: “Could not execute statement”
Sobel edge detection 3D	vtkImageSobel3D
Anisotropic diffusion (3D)	vtkImageAnisotropicDiffusion3D	Need a suitable input.
Write an ExodusII file	vtkExodusIIWriter	Write a time varying file. Someone who is familiar with this format should make a reasonable example.
ImageReader2	vtkImageReader2	No errors, but no image is displayed. I think this is a superclass not intended to be used directly?
Low pass filter an image	vtkImageIdealLowPass
Delete points	vtkPolyData	No longer crashes but doesn't seem to do anything. See example Delete cells.
Delete cells	vtkPolyData	Not sure if this has much utility?
Play/stop/fast forward etc buttons	vtkPlaybackWidget	Need to show user how to start recording? Playback a recording?
Vary the shape of vertices	vtkGraphLayoutView
Vary the width of edges	vtkGraphLayoutView
Write an unstructured grid to parallel files	vtkXMLPUnstructuredGridWriter	Even with SetNumberOfPieces(4), only 2 files are generated?
Convert a vtkTable to a vtkGraph	vtkTableToGraph	How to specify the columns?
Generate a diagonal matrix	vtkDiagonalMatrixSource	What type is output?
Generate different glyphs based on a table	vtkGlyph3D	How to specify which values get which glyphs?
Write an image file to parallel files	vtkXMLPImageDataWriter	Even with SetNumberOfPieces(4), only 2 files are generated?
Combine the points of multiple PolyData datasets	vtkAppendPoints	The data sets seem to have been combined (there are 10 points and 10 cells in the output), but nothing is displayed -- this is because the points and cells are copied but not the verts. See example vtkAppendPolyData instead (there's already an example for that).
Extract a subgraph	vtkExtractSelectedGraph	Waiting for dual vtkGraphView
Order cells from a viewing direction	vtkKdTree
Merge selections	vtkSelection
SpherePuzzle	vtkSpherePuzzle	Looks like a beach ball... what is the point?
Extract points based on a criterion function	vtkExtractSelectedThresholds
Get connected cells	vtkCellLinks	How to use vtkCellLinks::Links class? How to know how many cells GetCells returns?
Convert data from an object into a vtkTable	vtkDataObjectToTable	How to get the point coordinates into the table?
vtkImageViewer2	vtkImageViewer2	How to start the interaction?
Convert a polydata to an implicit function	vtkImplicitDataSet	The error is: "Can't evaluate dataset!"
vtkCameraWidget	vtkCameraWidget	How to use this?
Compute occupancy of an object on a grid	vtkVoxelModeller	VTK_BIT is not supported - convert it?
Divide a point cloud into uniform cubic voxels	vtkCellLocator	We can determine which cell a point is in, but how to determine which points are in a particular cell?
Flight	vtkInteractorStyleFlight	linux keypresses not handled. I submitted a patch to the devel list - we'll see if they respond.
vtkPointHandleRepresentation2D	vtkPointHandleRepresentation2D
RecordEvents	vtkInteractorEventRecorder	How to exit?
PlayBackEvents	vtkInteractorEventRecorder	How to slow down?
Quadric Surface Fitting	vtkQuadric
Rectangular button source	vtkRectangularButtonSource	is this the intended usage?
ApplyColors	vtkApplyColors	How is this different from just adding a Colors array to a vtkDataSet?
vtkPCAAnalysisFilter	vtkPCAAnalysisFilter	What is the difference between this and vtkPCAStatistics? The eigenvalues vector doesn't seem to be valid. It seems like the eigenvector corresponding to the smallest value is stored as the normal of the cell in the output - how do you get the other two eigen vectors?

Wish List

Example Name	VTK Classes Demonstrated	Description
Plot data (Legacy method)	vtkXYPlotActor	The charts examples always seem to render slightly differently.
Display a histogram	vtkImageAccumulate, XYPlotActor	The charts examples always seem to render slightly differently.
vtkTableBasedClipDataSet	vtkTableBasedClipDataSet	Empty
vtkLSDynaReader	vtkLSDynaReader	Empty
vtkCompositeDataGeometryFilter	vtkCompositeDataGeometryFilter	Empty - combine multiple blocks into a single data set
vtkTryDowncast	vtkTryDowncast	Empty

Big Problems

Example Name	VTK Classes Demonstrated	Description
A comparison of some graph layout strategies	vtkGraphLayoutView	This crashes unless you build against the VTK-SideBySideGraphs branch from here: git@github.com:daviddoria/daviddoria-vtk.git
Extract iso-surfaces	vtkMarchingContourFilter	No output produced without a vtkVoxelModeller, strange output produced with a vtkVoxelModeller.
Set a value by manipulating something	vtkContinuousValueWidget	Can't instantiate this class? But nothing derives from it?
Delete a cell.	vtkPolyData	I tried this with lines and it doesn't work (crashes). The documentation says only works with polys - so wait for this functionality to be added?
Box intersection	vtkBox	This class doesn't have any non static functions! Need to create convenience functions.
vtkTensorProbeWidget	vtkTensorProbeWidget	How is this used?
GeoGlobeSource	vtkGeoGlobeSource
GeoView	vtkGeoView
vtkFrustumCoverageCuller	vtkFrustumCoverageCuller	Doesn't seem to have a property to specify a frustum? What is it for? How to use it?
vtkKdTreeSelector	vtkKdTreeSelector	Shell
vtkRungeKutta4	vtkRungeKutta4	Shell
vtkCoincidentPoints	vtkCoincidentPoints	What is this for?
Threaded/Parallel example		Shell
Assign an array to a particular field	vtkAssignAttribute	Shell
vtkTransposeMatrix	vtkTransposeMatrix	What is this supposed to operate on? There is no vtkMatrix class.
vtkHyperOctree	vtkHyperOctree	What does this do?
vtkTextExtraction	vtkTextExtraction	Shell