# C++ Examples

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.

Info

This table shows the VTK classes covered by the examples.

Info

This table shows VTK classes that do not have an example. Please add examples in your area of expertise!

## Hello World

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

## Simple Operations

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
DistanceBetweenPoints | vtkMath | 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

### Graph Formats

### 3D File Formats

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

#### Standard Formats

##### Input

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
DelimitedTextReader | vtkDelimitedTextReader | Read a delimited file into a polydata. |
DEMReader | vtkDEMReader | Read DEM (elevation map) files |
DumpXMLFile | vtkDataSetReader | Report the contents of a VTK XML or legacy file |
IndividualVRML | vtkVRMLImporter | This example is used to get each actor and object from a scene and verify axes correspondence |
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. |
ReadAllPolyDataTypes | vtkBYUReader vtkOBJReader vtkPLYReader vtkPolyDataReader vtkSTLReader vtkXMLPolyDataReader | Read any VTK polydata file. |
ReadAllPolyDataTypesDemo | vtkBYUReader vtkOBJReader vtkPLYReader vtkPolyDataReader vtkSTLReader vtkXMLPolyDataReader | Read all VTK polydata file types. |
ReadOBJ | vtkOBJReader | Read an OBJ (.obj) file. |
ReadPDB | vtkPDBReader | Read Protein Data Bank Files. |
ReadPLOT3D | vtkPLOT3DReader | Read CFD (computational fluid dynamics) data produced by PLOT3D. |
ReadPLY | vtkPLYReader | Read PLY (.ply) files |
ReadPlainTextTriangles | vtkPolyData vtkSmartPointer vtkPoints vtkCellArray vtkXMLPolyDataWriter | Read a plain text file into a polydata. |
ReadTextFile | vtkPolyData | Read a plain text file into a polydata. |
ReadSTL | vtkSTLReader | Read stereo lithography STL (.stl) files |
SimplePointsReader | vtkSimplePointsReader | Read a simple "xyz" file of points. |

###### Importers

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
3DSImporter | vtk3DSImporter | Import a 3D Studio scene that includes multiple actors. |
OBJImporter | vtkOBJImporter | Import an OBJ scene that includes actors, materials and textures. |
VRMLImporter | vtkVRMLImporter | Import a VRML 2.0 (WRL) file. |
VRMLImporterDemo | vtkVRMLImporter | Import a VRML 2.0 (WRL) file and add normals if necessary. |

##### Output

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
ExodusIIWriter | vtkExodusIIWriter | Write a time varying ExodusII file. |
XMLPImageDataWriter | vtkXMLPImageDataWriter | Write a .pvti file with 4 .vti pieces. |
XMLPUnstructuredGridWriter | vtkXMLPUnstructuredGridWriter | Write a .pvtu with 4 .vtu pieces. |
WriteVTI | vtkXMLImageDataWriter | Write a .vti file. VTI is an "ImageData". |
WriteVTP | vtkXMLPolyDataWriter | Write a .vtp file. VTP is a "PolyData". This format allows for the most complex geometric objects to be stored. |
WriteVTU | vtkXMLUnstructuredGridWriter | Write a .vtu file. VTU is an "Unstructured Grid". This format allows for 3D data to be stored. |
XMLStructuredGridWriter | vtkXMLStructuredGridWriter | Write a .vts file from a vtkStructuredGrid. |

#### Legacy VTK Formats

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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 Format

#### Input

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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. |
JPEGReader | vtkJPEGReader | Read a JPEG image. |
MetaImageReader | vtkMetaImageReader | Read .mha files. |
PNGReader | vtkPNGReader | Read a PNG image. |
ReadBMP | vtkBMPReader | Read BMP (.bmp) files. |
ReadDICOMSeries | vtkDICOMImageReader | This example demonstrates how to read a series of DICOM images and scroll through slices |
ReadDICOM | vtkDICOMImageReader | Read DICOM file |
ReadPNM | vtkPNMReader | Read PNM (.pnm) files. |
ReadTIFF | vtkTIFFReader | Read TIFF (.tif) files. |

#### Output

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

## Geometric Objects

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
Axes | vtkAxesActor |  |
ColoredLines | vtkCellData vtkLine |  |
Dodecahedron | vtkPolyhedron | Create a dodecahedron using vtkPolyhedron |
EllipticalCylinder | vtkLinearExtrusionFilter | Create an elliptical cylinder using extrusion. |
EllipticalCylinderDemo | vtkLinearExtrusionFilter | Show the base and extrusion vector. |
GeometricObjectsDemo |  | A demonstration of all geometric objects that work the same way. |
PlanesIntersection | vtkPlanesIntersection |  |
Planes | vtkPlanes |  |
PolygonIntersection | vtkPolygon | Compute the intersection of a line segment with a polygon. |

### Cells

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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. |
CellTypeSource | vtkCellTypeSource vtkTessellatorFilter | Generate tessellated cells. |
ConvexPointSet | vtkConvexPointSet | Generate a ConvexPointSetCell. |
Hexahedron | vtkHexahedron |  |
LongLine | vtkLine | Manually create a polyline |
Point | vtkPoints |  |
PolyLine | vtkPolyLine |  |
Polygon | vtkPolygon |  |
Polyhedron | vtkPolyhedron |  |
Pyramid | vtkPyramid |  |
Quad | vtkQuad |  |
Tetrahedron | vtkTetra |  |
Triangle strip | vtkTriangleStrip |  |
Triangle | vtkTriangle |  |
Vertex | vtkVertex |  |

### Sources

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
Arrow | vtkArrowSource |  |
Cone | vtkConeSource |  |
Cube | vtkCubeSource |  |
Cylinder | vtkCylinderSource |  |
Disk | vtkDiskSource | A circle with a hole in it. |
Frustum | vtkFrustumSource |  |
Line | vtkLineSource |  |
OrientedArrow | vtkArrowSource | Orient an arrow along an arbitrary vector |
OrientedCylinder | vtkCylinderSource | Orient a cylinder along an arbitrary vector |
Plane | vtkPlaneSource |  |
PlatonicSolid | vtkPlatonicSolidSource |  |
RegularPolygon | vtkRegularPolygonSource |  |
Sphere | vtkSphereSource |  |
TessellatedBoxSource | vtkTessellatedBoxSource | Generated a box with tessellated sides. |

### Non Linear

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
QuadraticHexahedron | vtkQuadraticHexahedron vtkTessellatorFilter | Create and tessellate a nonlinear cell. |
QuadraticHexahedronDemo | vtkQuadraticHexahedron vtkTessellatorFilter | Interactively adjust chord error. |
QuadraticTetra | vtkTetra vtkTessellatorFilter | Create and tessellate a nonlinear cell. |
QuadraticTetraDemo | vtkTetra vtkTessellatorFilter | Interactively adjust chord error. |

### 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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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. |

## Implicit Functions and Iso-surfaces

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BandedPolyDataContourFilter | vtkBandedPolyDataContourFilter | Create filled contours. |
ContourTriangulator | vtkMarchingSquares vtkContourTriangulator | Create a contour from a structured point set (image) and triangulate it. |
CutWithCutFunction | vtkCutter | Cut a surface with an implicit plane using vtkCutter. |
CutWithScalars | vtkContourFilter | Cut a surface with scalars. |
DiscreteMarchingCubes | vtkDiscreteMarchingCubes | Generate surfaces from labeled data. |
ExtractLargestIsosurface | vtkPolyDataConnectivityFilter | Extract largest isosurface. |
FilledContours | vtkContourFilter | Create filled contours (using vtkClipPolyData). |
ImplicitDataSet | vtkImplicitDataSet | Convert an imagedata to an implicit function. |
ImplicitSphere | vtkSphere | An implicit representation of a sphere. |
IsoContours | vtkContourFunction | Visualize different isocontours using a slider. |
MarchingCubes | vtkMarchingCubes | Create a voxelized sphere. |
MarchingCases | vtkMarchingCubes | Explore the Marching Cubes cases. |
MarchingSquares | vtkMarchingSquares | Create a contour from a structured point set (image). |
SampleFunction | vtkSampleFunction | Sample and visualize an implicit function. |
SmoothDiscreteMarchingCubes | vtkDiscreteMarchingCubes vtkWindowedSincPolyDataFilter | Generate smooth surfaces from labeled data. |

## Working with 3D Data

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

### Data Types

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
CompositePolyDataMapper | vtkCompositePolyDataMapper |  |
MultiBlockDataSet | vtkMultiBlockDataSet | Demonstrates how to make and use VTK's MultiBlock type data |
OverlappingAMR | vtkOverlappingAMR | Demonstrates how to create and populate a VTK's Overlapping AMR Grid type Data |

### Data Type Conversions

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
PolyDataToUnstructuredGrid | vtkAppendFilter | Convert a vtkPolyData to a vtkUnstructuredGrid. |

### Point Cloud Operations

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

### Working with Meshes

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

#### Clipping

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BoxClipStructuredPoints | vtkBoxClipDataSet vtkStructuredPoints | Clip vtkStructuredPoints with a box. The results are unstructured grids with tetrahedra. |
BoxClipUnstructuredGrid | vtkBoxClipDataSet vtkUnstructuredGrid | Clip a vtkUnstructuredGrid with a box. The results are unstructured grids with tetrahedra. |
CapClip | vtkClipPolyData | Cap a clipped polydata with a polygon. |
ClipClosedSurface | vtkClipClosedSurface | Clip a surface with multiple planes. |
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. |
ClipFrustum | vtkFrustumSource vtkClipPolyData | Clip a vtkPolyData with the vtkCamera's view frustum. |
GenericClip | vtkGenericClip vtkBridgeDataSet vtkGenericDataSet |  |
ImplicitDataSetClipping | vtkImplicitDataSet | Clip using an implicit data set. |
SolidClip | vtkClipPolyData | Create a "solid" clip. |
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. |

### 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. 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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
CellIdFromGridCoordinates | vtkStructuredData | Get the id of a cell from its grid coordinates. |
ExtractVOI | vtkExtractVOI | Extract a volume of interest (subvolume). |
GetCellCenter | vtkImageData | Get the coordinates of the center of a cell. |
ImageIterator | vtkImageIterator |  |
ImageIteratorDemo | vtkImageIterator | Demonstrate using an iterator to access pixels in a region. |
ImageNormalize | vtkImageNormalize | Normalize an image. |
ImageReslice | vtkImageReslice | Resize a vtkImageData. |
ImageTranslateExtent | vtkImageTranslateExtent | Change the extent of a vtkImageData. |
ImageWeightedSum | vtkImageWeightedSum | Add two or more images. |
IntersectLine | vtkImageData | Intersect a line with all cells of a vtkImageData. |
IterateImageData | vtkImageData | Iterating over a vtkImageData. |

#### Conversions

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

#### vtkStructuredGrid

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

#### vtkStructuredPoints

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
StructuredPointsToUnstructuredGrid | vtkStructuredPoints vtkUnstructuredGrid | Convert a vtkStructuredPoints to a vtkUnstructuredGrid. |

#### vtkRectilinearGrid

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
RectilinearGridToTetrahedra | vtkRectilinearGridToTetrahedra | Convert a vtkRectilinearGrid to a vtkUnstructuredGrid mesh |
RectilinearGrid | vtkRectilinearGrid | Rectilinear grid |
VisualizeRectilinearGrid | vtkRectilinearGrid vtkShrinkFilter | Visualize the cells of a rectilinear grid |

### Registration

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

### Medical

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
GenerateCubesFromLabels | vtkMetaImageReader vtkMaskFields | Create cubes from labeled volume data. |
GenerateModelsFromLabels | vtkDiscreteMarchingCubes vtkWindowedSincPolyDataFilter | Create models from labeled volume data vtkDiscreteMarchingCubes). |
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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
Delaunay3D | vtkDelaunay3D | Create a solid mesh from Unorganized Points. |
Delaunay3DDemo | vtkDelaunay3DDemo | Interactively adjust Alpha for Delaunay3D. |
ExtractSurfaceDemo | vtkExtractSurface vtkPCANormalEstimation vtkSignedDistance | Create a surface from Unorganized Points using Point filters (DEMO). |
ExtractSurface | vtkExtractSurface vtkPCANormalEstimation vtkSignedDistance | Create a surface from Unorganized Points using Point filters. |
GaussianSplat | vtkGaussianSplatter | Create a surface from Unorganized Points (Gaussian Splat). |
SurfaceFromUnorganizedPointsWithPostProc | vtkSurfaceReconstructionFilter | Create a surface from Unorganized Points (with post processing). |
SurfaceFromUnorganizedPoints | vtkSurfaceReconstructionFilter | Create a surface from Unorganized Points. |
TriangulateTerrainMap | vtkDelaunay2D | Generate heights (z values) on a 10x10 grid (a terrain map) and then triangulate the points to form a surface. |

## Utilities

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BoundingBoxIntersection | vtkBoundingBox | Box intersection and Inside tests. |
BoundingBox | vtkBoundingBox | Bounding Box construction. |
BrownianPoints | vtkBrownianPoints | Produce a random vector at each point in a dataset. |
CardinalSpline | vtkCardinalSpline | Cardinal spline Interpolation. |
Casting | vtkObject::SafeDownCast | Casting VTK objects. |
CheckVTKVersion | vtkVersion | Check VTK Version. |
ColorLookupTable | vtkLookupTable | Color Lookup Table. |
ColorTransferFunction | vtkColorTransferFunction | Color Transfer Function. |
CommandSubclass | vtkCommand | Instead of using a callback function, it is more powerful to subclass vtkCommand. |
ConstrainedDelaunay2D | vtkDelaunay2D | Perform a 2D Delaunay triangulation on a point set respecting a specified boundary. |
Coordinate | vtkCoordinate | Coordinate system conversions. |
DeepCopy |  | Deep copy a VTK object. |
Delaunay2D | vtkDelaunay2D | Perform a 2D Delaunay triangulation on a point set. |
DetermineActorType | vtkActor vtkActorCollection | Determine the type of an actor. |
DiscretizableColorTransferFunction | vtkDiscretizableColorTransferFunction | Discretizable Color Transfer Function. |
FileOutputWindow | vtkFileOutputWindow | Write errors to a log file instead of the screen. |
FilenameFunctions | vtkDirectory vtksys/SystemTools | Do things like get the file extension, strip the file extension, etc. |
FilterSelfProgress |  | Monitor a filters progress. |
FrameRate |  | Get the frame rate of the rendering. |
FullScreen | vtkRenderWindow | Maximize/full screen a vtkRenderWindow. |
FunctionParser | vtkFunctionParser | String function parser. |
GetClassName | GetClassName() | Determine the type of a VTK variable. |
GetDataRoot | vtkTesting | Find the path of VTK_DATA_ROOT. |
LUTUtilities | vtkLookupTable vtkColorSeries | A utility class for vtkLookupTable allowing you to output the table contents or to compare tables. |
MultipleRenderWindows | vtkRenderWindow | Multiple Render Windows |
MultipleViewports | vtkRenderer::SetViewPort | Multiple Viewports. |
OffScreenRendering | vtkImagingFactory vtkGraphicsFactory | Off Screen Rendering. |
PCADemo | vtkPCAStatistics | Project 2D points onto the best 1D subspace (PCA Demo). |
PCAStatistics | vtkPCAStatistics | Compute Principal Component Analysis (PCA) values. |
PassThrought | vtkPassThrough | Pass input along to outpu. |
PiecewiseFunction | vtkPiecewiseFunction | Interpolation using a piecewise function. |
PointInPolygon | vtkPolygon | Point inside polygon test. |
ReportRenderWindowCapabilities | vtkRenderWindow | Report the capabilities of a render window. |
SaveSceneToFieldData | vtkCamera | Save a vtkCamera's state i a vtkDataSet's vtkFieldData and restore it. |
SaveSceneToFile | vtkCamera | Save a vtkCamera's state in a file and restore it.d. |
Screenshot | vtkWindowToImageFilter |  |
ShallowCopy |  | Shallow copy a VTK object. |
ShareCamera | vtkRenderer vtkCamera | Share a camera between multiple renderers. |
ShepardMethod | vtkShepardMethod | Shepard method interpolation. |
SideBySideViewports | vtkRenderer::SetViewPort | Side by side viewports. |
TimeStamp | vtkTimeStamp | Time stamp. |
TimerLog | vtkTimerLog | Timer log. |
Timer | vtkRenderWindowInteractor::CreateRepeatingTimer |  |
Variant | vtkVariant | Convert between data types. |
Vector | vtkVector | Mathematical vector class. |
VersionMacros | Macro/#define's | Check VTK Version. |
ViewportBorders |  | Draw a border around each viewport. |
VisualDebugging |  | Update the screen from inside an algorithm. |
ZBuffer | vtkRenderer | zbuffer. |

### Arrays

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
2DArray | vtkDenseArray | 2D Array. |
3DArray | vtkDenseArray | 3D Array. |
ArrayCalculator | vtkArrayCalculator | Perform in-place operations on arrays. |
ArrayLookup | vtkDataArray | Find the location of a value in a vtkDataArray. |
ArrayRange | vtkFloatArray::GetRange | Get the bounds (min,max) of a vtk array. |
ArrayToTable | vtkArrayToTable | Convert a vtkDenseArray to a vtkTable. |
ArrayWriter | vtkArrayWriter | Write a DenseArray or SparseArray to a file. |
ConstructTable | 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. |
CustomDenseArray | vtkDenseArray | Custom type Dense (2D) Array. |
DenseArrayRange | vtkDenseArray vtkArrayRange | Get the bounds of a vtkDenseArray. |
ExtractArrayComponent | vtkArrayCalculator | Extract a component of an array. |
KnownLengthArray | vtkFloatArray | Known Length Array. |
SortDataArray | vtkSortDataArray | Reorder array values based on an ordering (key) array. |
SparseArray | vtkSparseArray | Sparse Array. |
UnknownLengthArray | vtkFloatArray | Unknown Length Array. |
VectorArrayKnownLength | vtkFloatArray | Array of Vectors (Known Length). |
VectorArrayUnknownLength | vtkFloatArray | Array of Vectors (Unknown Length). |

### Events

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
CameraModifiedEvent | vtkCameraWindow | Catch the camera modified event. |
ObserveError | vtkCommand | Catch errors and warnings. |
WindowModifiedEvent | vtkRenderWindow | Catch the window modified event. |

## CMake Techniques

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

## Math Operations

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
EigenSymmetric | vtkMath::Jacobi | Compute eigenvalues and eigenvectors of a symmetric matrix. |
HomogeneousLeastSquares | vtkMath::SolveHomogeneousLeastSquares | Homogeneous Least Squares. |
1DTupleInterpolation | vtkTupleInterpolator vtkCardinalSpline vtkKochanekSpline | A simple example demonstrating how functions defined by sparsely distributed supporting points can be interpolated at arbitrary positions. |
LUFactorization | vtkMath | LU Factorization. |
LeastSquares | vtkMath::SolveLeastSquares | Least Squares. |
MatrixInverse | vtkMatrix3x3 | Matrix inverse. |
MatrixTranspose | vtkMatrix3x3 | Matrix transpose. |
NormalizeVector | vtkMath | Normalize a vector. |
PerpendicularVector | vtkMath::Perpendiculars | Get a vector perpendicular to another vector. |
VectorDot | vtkVectorDot |  |
VectorNorm | vtkVectorNorm | Get the lengths of an array of vectors. |

## Graphs

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
AdjacencyMatrixToEdgeTable | vtkAdjacencyMatrixToEdgeTable | Convert an adjacency matrix to an edge table. |
AdjacentVertexIterator | vtkAdjacentVertexIterator | Get all vertices connected to a specified vertex. |
BoostBreadthFirstSearchTree | vtkBoostBreadthFirstSearchTree | Breadth first search tree. Can also be used to convert a graph to a tree. |
BreadthFirstDistance | vtkBoostBreadthFirstSearch | Distance from origin. |
ColorEdges | vtkGraphLayoutView | Color edges. |
ColorVertexLabels | vtkGraphLayoutView vtkRenderedGraphRepresentation | Set the color of vertex labels. |
ColorVerticesLookupTable | vtkGraphLayoutView | Color vertices. |
ConnectedComponents | vtkBoostConnectedComponents | Find connected components of a graph. |
ConstructGraph | vtkMutableUndirectedGraph | Construct a graph. |
ConstructTree | vtkTree vtkMutableDirectedGraph | Construct a tree. |
DepthFirstSearchAnimation | vtkTreeDFSIterator | Depth First Search Animation. |
DepthFirstSearchIterator | vtkTreeDFSIterator | Depth First Search iterator. |
EdgeListIterator | vtkEdgeListIterator | Iterate over edges of a graph. |
EdgeWeights | vtkGraph::GetEdgeData::AddArray | Edge weights. |
GraphPoints | vtkGraph::SetPoints, vtkPassThroughLayoutStrategy | Manually set coordinates of vertices in a graph. |
GraphToPolyData | vtkGraphToPolyData | Convert a graph to a PolyData. |
InEdgeIterator | vtkInEdgeIterator | Iterate over edges incoming to a vertex. |
LabelVerticesAndEdges | vtkGraphLayoutView | Label vertices and edges. |
MinimumSpanningTree | vtkBoostPrimMinimumSpanningTree | Minimum spanning tree of a graph. |
MutableGraphHelper | vtkMutableGraphHelper | Create either a vtkMutableDirectedGraph or vtkMutableUndirectedGraph. |
NOVCAGraph | vtkUnstructuredGrid vtkXMLUnstructuredGridWriter vtkPolyLine | Create a graph & visualize it in ParaView/VisIt. |
OutEdgeIterator | vtkOutEdgeIterator | Iterate over edges outgoing from a vertex. |
RandomGraphSource | vtkRandomGraphSource | Create a random graph. |
RemoveIsolatedVertices | vtkRemoveIsolatedVertices | Remove vertices of degree 0 from a vtkGraph. |
ScaleVertices | vtkGraphLayoutView vtkRenderedGraphRepresentation | Size/scale vertices based on a data array. |
SelectedVerticesAndEdges | vtkAnnotationLink | Get a list of selected vertices and edges. |
SelectedVerticesAndEdgesObserver | vtkAnnotationLink | Get a list of selected vertices and edges using an observer of AnnotationChangedEvent. |
ShortestPath | vtkDijkstraGraphGeodesicPath | Find the shortest path on a graph. |
SideBySideGraphs | vtkGraphLayoutView | Display two graphs side by side. |
TreeBFSIterator | vtkTreeBFSIterator | Breadth First Search iterator. |
VertexSize | vtkGraphLayoutView vtkRenderedGraphRepresentation | Set the size of vertices. |
VisualizeDirectedGraph | vtkGlyphSource2D | Visualize a directed graph. |
VisualizeGraph | vtkGraphLayoutView vtkGraphLayoutStrategy vtkSimple2DLayoutStrategy | Visualize a graph. |

### Graph Conversions

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
DirectedGraphToMutableDirectedGraph | vtkMutableDirectedGraph vtkDirectedGraph | vtkDirectedGraph to vtkMutableDirectedGraph. |
MutableDirectedGraphToDirectedGraph | vtkMutableDirectedGraph vtkDirectedGraph | vtkMutableDirectedGraph to vtkDirectedGraph. |
TreeToMutableDirectedGraph | vtkMutableDirectedGraph vtkTree | vtkTree to vtkMutableDirectedGraph |

## Data Structures

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
AttachAttributes | vtkInformation | Attach attributes to a VTK array |
CellLocatorVisualization | vtkCellLocator | Visualization of the tree of a vtkCellLocator. |
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. |
PointLocatorVisualization | vtkPointLocator | Visualization of the tree of a vtkPointLocator. |
PointLocator | vtkPointLocator | Efficient 3D point query. |
PointLocatorRadius | vtkPointLocator | Find all points within a radius of a specified point. |

### Timing Demonstrations

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

### KD-Tree

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BuildLocatorFromKClosestPoints | vtkKdTree |  |
ClosestNPoints | vtkKdTreePointLocator | Find the closest N points to a query point. |
DataStructureComparison | vtkKdTree vtkOBBTree vtkOctreePointLocator vtkModifiedBSPTree | Illustrates, side by side, the differences between several spatial data structures |
KDTreeAccessPoints | vtkKdTree | Access the points of a KDTree. |
KDTreeFindPointsWithinRadius | vtkKdTreePointLocator | Find points within a specified radius of a query point. |
KdTreePointLocatorClosestPoint | vtkKdTreePointLocator | Find the closest point to a query point. |
KdTree | vtkKdTree |  |
VisualizeKDTree | vtkKdTreePointLocator | Visualize levels of the tree. |

### Oriented Bounding Box (OBB) Tree

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
OBBTreeIntersectWithLine | 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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BuildOctree | vtkOctreePointLocator | Create an octree. |
OctreeFindPointsWithinRadius | vtkOctreePointLocator | Find the points within a sphere of specified radius to a query point. |
IncrementalOctreePointLocator | vtkIncrementalOctreePointLocator | Insert points into an octree without rebuilding it. |
OctreeKClosestPoints | vtkOctreePointLocator | Find the K closest points to a query point. |
OctreeClosestPoint | vtkOctreePointLocator | Find the closest point to a query point. |
OctreeVisualize | vtkOctreePointLocator | Visualize levels of the tree. |

### Modified BSP Tree

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
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. |

### HyperTreeGrid

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
HyperTreeGridSource | vtkHyperTreeGridSource | Create a vtkHyperTreeGrid. |

## VTK Concepts

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

## Rendering

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
AmbientSpheres | vtkProperty | Demonstrates the effect of ambient lighting on spheres. |
CylinderRenderingProperties | vtkProperty | Change the properties of a cylinder. |
DiffuseSpheres | vtkProperty | Demonstrates the effect of diffuse lighting on spheres. |
Rainbow | vtkLookupTable | Use and manipulation of vtkLookupTables. |
Rotations | vtkActor::RotateX,Y,Z vtkRenderer::EraseOff | Rotations of a cow about her axes. |
SpecularSpheres | vtkProperty | Demonstrates the effect of specular lighting on spheres. |
StippledLine | vtkTexture | Draw a stippled line. |
WalkCow | vtkBYUReader vtkRenderWindow::EraseOff() vtkActor | This generates Figs. 3-31, 3-32, 3-33 found in VTKTextbook.pdf. |

## Lighting

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
LightActor | vtkLightActor | Display the location and direction of a light. |
Light | vtkLight | Add a directional light to a scene. |
Shadows | vtkShadowMapPass | Create shadows. |
SpotLights | vtkLight | Create two positional(spot) lights. |

## Texture Mapping

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BackgroundTexture | vtkRenderer vtkTexture | Use a texture for the background of a vtkRenderer. |
ClipArt | vtkTextureMapToPlane | Generate 3D clip art from an image. |
TextureCutQuadric | vtkBooleanTexture vtkImplicitTextureCoords | Cut a quadric with boolean textures. |
TextureCutSphere | vtkImplicitTextureCoords | Cut a sphere using texture coordinates. |
TextureMapImageData | vtkImageCanvasSource2D | Texture map an ImageData. |
TextureMapPlane | vtkTextureMapToPlane | Texture map a plane. |
TextureMapQuad | vtkPolygon vtkPolyData | Texture map a quad. |
TexturedSphere | vtkTextureMapToSphere | Texture a sphere. |

## Visualization

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

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
Arbitrary3DCursor | vtkPointWidget | Track a 3D cursor. |
AssignCellColorsFromLUT | vtkNamedColors vtkPlaneSource vtkLookupTable vtkColorTransferFunction | Demonstrates how to assign colors to cells in a vtkPolyData structure using lookup tables. |
BackfaceCulling | vtkActor | Backface culling. |
BackgroundColor | vtkRenderer | Background color. |
BackgroundGradient | vtkRenderer vtkRenderer | Background gradient. |
BillboardTextActor3D | vtkBillboardTextActor3D | Label points with billboards. |
BlobbyLogo | vtkImplicitModeller | Blobby logo from VTK textbook. |
BluntStreamlines | vtkStructuredGridGeometryFilter vtkStreamTracer | Demonstrates airflow around a blunt fin using streamlines. |
CameraActor | vtkCameraActor | Visualize a camera (frustum) in a scene. |
CameraModel1 | vtkCameraActor | Illustrate camera movement. |
CameraModel2 | vtkCameraActor | Illustrate camera movement. |
Camera | vtkCamera | Positioning and aiming the camera. |
CaptionActor2D | vtkCaptionActor2D | Draw a caption/bubble pointing to a particular point. |
ChooseTextColorDemo | vtkTextActor vtkNamedColors | Create a grid of random colored viewpports and pick a good text color. |
ChooseTextColor | vtkTextActor vtkTextProperty::SetFontFamily vtkNamedColors | Choose a text color that contrasts with a background color. |
CloseWindow | vtkRenderWindowInteractor vtkRenderWindow | Close a render window. |
ColorActorEdges | vtkActor | Color the edges of an Actor. |
ColorAnActor | vtkActor | Color an Actor. |
ColorGlyphs | vtkGlyph3D vtkGlyph3D | Color glyphs. |
ComplexV | vtkHedgeHog | ComplexV from the VTK Textbook. |
CornerAnnotation | vtkCornerAnnotation | Write text in the corners of a window. |
CorrectlyRenderTranslucentGeometry | vtkDepthSortPolyData | Correctly Rendering Translucent Geometry. |
CubeAxesActor2D | vtkCubeAxesActor2D | This example uses the vtkCubeAxesActor2D to show your scene with axes to indicate the spatial extent of your data. |
CubeAxesActor | vtkCubeAxesActor | Display three orthogonal axes with labels. |
Cursor3D | vtkCursor3D |  |
CursorShape | vtkRenderWindow | Change the shape of the cursor. |
CurvatureBandsWithGlyphs | 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. |
CurvedReformation | vtkProbeFilter | Sample a volume with a curved surface. In medical imaging, this is often called curved multi planar reformation. |
Cutter | vtkCutter |  |
DepthSortPolyData | vtkDepthSortPolyData | Poly Data Depth Sorting. |
DisplacementPlot | vtkColorTransferFunction vtkWarpVector vtkVectorDot | Show modal lines for a vibrating beam. |
DisplayCoordinateAxes | vtkOrientationMarkerWidget | Display coordinate axes. |
DisplayQuadricSurfaces | vtkQuadric vtkSampleFunction vtkContourFilter | Display Quadric Surfaces. |
DistanceToCamera | vtkDistanceToCamera |  |
DrawText | vtkTextActor vtkTextProperty | Display Text. |
ElevationBandsWithGlyphs | 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. |
ExtrudePolyDataAlongLine | vtkRuledSurfaceFilter | Extrude a 2D polydata along a line in 3D space. |
FastSplatter | vtkFastSplatter | Convolve a splat image with every point in an input image. |
FindCellIntersections | vtkCellLocator | Find the intersection of a line and the cells in an unstructured dataset |
FlatShading | vtkActor |  |
Follower | vtkFollower | Draw text that stays right side up. |
FontFile | vtkTextProperty | Use an external font. |
Glyph2D | vtkGlyph2D |  |
Glyph3D | vtkGlyph3D |  |
Glyph3DImage | vtkGlyph3DMapper | Glyph the points in a vtkImageData. |
Glyph3DMapper | vtkGlyph3DMapper |  |
Hawaii | vtkElevationFilter vtkColorSeries vtkLookupTable | Visualize elevations by coloring the scalar values with a lookup table. |
HedgeHog | vtkHedgeHog vtkStructuredGrid | Create oriented lines (hedgehogs) from vector data. |
HideActor | vtkPropCollection vtkProp | visible |
HideAllActors | vtkRenderer | Hide all actors. |
ImageMapper | vtkImageMapper | Display an image in 2D. |
ImageOrder | vtkRenderer | Determine the display order of a stack of images. |
ImageOrientation | vtkInteractorStyleImage | Orientation of the view of an image. |
ImageTransparency | vtkImageData | Set transparency of image pixels. |
IsosurfaceSampling | vtkProbeFilter | Demonstrates how to create point data on an isosurface. |
Kitchen | vtkStreamTracer vtkStructuredGrid | Demonstrates stream tracing in a kitchen. |
LODProp3D | vtkLODProp3D | Level of detail rendering. |
LabelContours | vtkLabeledDataMapper | Label Contours. |
LabelPlacementMapper | vtkPointSetToLabelHierarchy vtkLabelPlacementMapper | Display a non-overlapping text label at each point. |
LabeledDataMapper | vtkLabeledDataMapper | Display the point ID at each point. |
LabeledMesh | vtkLabeledDataMapper | Label Mesh. |
LegendScaleActor | vtkLegendScaleActor | Display the scale of a scene. |
Legend | vtkLegendBoxActor |  |
LineWidth | vtkActor vtkProperty | Change the width/thickness of lines in an actor. |
MovableAxes | vtkFollower vtkAxesActor vtkAssembly | Movable axes. |
MoveActor | vtkInteractorStyleTrackballActor | Moving an Actor. |
MoveCamera | vtkInteractorStyleTrackballCamera | Moving the Camera. |
MultipleActors | vtkActor | Multiple Actors. |
NamedColors | vtkNamedColors | Demonstrate the use of the vtkNamedColors class.< |
NamedColorPatches | vtkNamedColors | Creates a HTML file called VTKNamedColorPatches | Demonstrates how to use the vtkNamedColors class.
NoShading | vtkActor |  |
NormalsDemo | vtkPolyDataNormals | Demo different ooption to generate normals. |
Opacity | vtkActor | Transparency, transparent. |
OrientedGlyphs | vtkGlyph3D | Create oriented glyphs from vector data. |
PlateVibration | vtkWarpVector vtkVectorDot | Demonstrates the motion of a vibrating beam. |
PointDataSubdivision | vtkLinearSubdivisionFilter vtkButterflySubdivisionFilter | Demonstrates the effect of applying these filters on various sources. |
PointSize | vtkActor |  |
ProgrammableGlyphFilter | vtkProgrammableGlyphFilter | Generate a custom glyph at each point. |
QuadraticSurface | vtkQuadric | Display a quadratic surface. |
QuadricLODActor | vtkQuadricLODActor | Level of detail adjustment. |
RandomProbe | vtkProbeFilter | Demonstrates how to probe a dataset with random points and select points inside the data set. |
RenderLargeImage | vtkRenderLargeImage | Render a large image, larger than a window. |
RenderView | vtkRenderView | A little bit easier rendering. |
ReverseAccess | vtkActor | Demonstrates how to access the source (e.g. vtkSphereSource) of an actor reversely. |
RotateActor | vtkActor | Rotate an Actor. |
ScalarBarActorColorSeries | vtkScalarBarActor vtkColorSeries | Display a color bar with a color series lookup table. |
ScalarBarActor | vtkScalarBarActor | Display a color bar. |
ScalarVisibility | vtkDataSetMapper | Switch between coloring the actor and coloring the data. |
ScaleGlyphs | vtkGlyph3D vtkGlyph3D | Scale glyphs. |
SceneBounds | vtkRenderer | Get the bounds of the whole scene. |
SelectWindowRegion | vtkInteractorStyleRubberBand2D | Select a region of a window. |
StreamLines | vtkStreamTracer | Streamlines. |
TensorGlyph | vtkTensorGlyph | Draw a rotated/scaled glyph at each point. |
TextSource | vtkTextSource | Display text. |
TransformActorCollection | vtkActorCollection | Transform an actor collection. |
TransformActor | vtkActor | Transform an Actor. |
TubesFromSplines | vtkTubeFilter vtkParametricFunctionSource vtkTupleInterpolator | Create tubes from interpolated points and scalars. |
TubesWithVaryingRadiusAndColors | vtkTubeFilter | Create tubes with varying radius and colors. |
VectorOfActors | vtkActor | Multiple Actors in a Vector. |
VectorText | vtkVectorText | Display high resolution text. |
VertexGlyphFilter | vtkVertexGlyphFilter | Add a vertex to each point. |
Visualize2DPoints | vtkPolyDataMapper2D vtkProperty2D | Visualize a 2D Set of Points. |
VisualizeImageData | vtkDataSetMapper | Visualize the points of an ImageData. |
VisualizeVTP | vtkXMLPolyDataReader vtkPolyDataMapper | Visualize a VTP File. |
WindowSize | vtkRenderWindow:SetSize | Change the size of a window. |
WindowTitle | vtkRenderWindow | Change the title of a window. |
Wireframe | vtkActor |  |
KochSnowflake | vtkPolyData vtkPolyLine vtkTriangle vtkLookupTable | Use recursion to represent a Koch snowflake fractal. |

## Volume Rendering

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
FixedPointVolumeRayCastMapperCT | vtkFixedPointVolumeRayCastMapper vtkColorTransferFunction vtkDICOMImageReader vtkMetaImageReader | Volume render DICOM or Meta volumes with various vtkColorTransferFunction's. |
HAVS | vtkHAVSVolumeMapper |  |
IntermixedUnstructuredGrid | vtkUnstructuredGridVolumeRayCastMapper vtkSLCReader | mix of poly data and unstructured grid volume mapper. |
MinIntensityRendering | vtkFixedPointVolumeRayCastMapper | Min intensity rendering. |
SmartVolumeMapper | vtkSmartVolumeMapper | Smart volume mapper. |

## User Interaction

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
AreaPicking | vtkAreaPicker | Area Picking. |
Assembly | vtkAssembly | Combine/group actors into an assembly. |
CallData | vtkCommand | Pass an observer a value (via CallData). |
CellPicking | vtkCellPicker | Cell Picking. |
ClientData | vtkCommand | Give an observer access to an object (via ClientData). |
DoubleClick | vtkInteractorStyleTrackballCamera | Catch a double click. |
Game | vtkInteractorStyleTrackballActor | Move a cube into a sphere. |
EllipticalButton | vtkEllipticalButtonSource vtkButtonWidget | Create an elliptical button. |
HighlightPickedActor | vtkPropPicker | Highlight a picked actor. |
HighlightSelectedPoints | vtkExtractGeometry | Highlight Selected Points. |
HighlightSelection | vtkExtractPolyDataGeometry | Highlight selection. |
ImageClip | vtkImageClip | Demonstrates how to interactively select and display a region of an image. |
ImageRegion | vtkCommand | Select a region of an image. |
InteractorStyleTerrain | vtkInteractorStyleTerrain | Terrain mode. |
InteractorStyleUser | vtkInteractorStyleUser | Create a completely custom interactor style (no default functionality is provided) |
KeypressEvents | vtkInteractorStyleTrackballCamera | Handle keypress events. |
KeypressObserver | vtkCallbackCommand | This uses a callback function rather than a derived interactor class. Handle keypress events (lightweight). |
MouseEvents | vtkInteractorStyleTrackballCamera | Subclass the interactor style. Handle mouse events. |
MouseEventsObserver | vtkCallbackCommand | Use an observer. Handle mouse events (light weight). |
MoveAGlyph | vtkGlyph3D | Drag a glyph around. |
MoveAVertexUnstructuredGrid | vtkPointPicker | Click and drag a vertex of a vtkUnstructuredGrid. |
ObserverMemberFunction |  | Set observers to be class member functions. |
PickableOff | vtkActor | Disallow interaction with a specific actor. |
Picking | vtkPropPicker | Get the world coordinate of the mouse click (if you clicked an actor) |
PointPicker | vtkPointPicker | Get the coordinates of the closest point in the data set to the mouse click. |
RubberBand2DObserver | vtkInteractorStyleRubberBand2D | RubberBand2D Observer. |
RubberBand2D | vtkInteractorStyleRubberBand2D |  |
RubberBand3D | vtkInteractorStyleRubberBand3D |  |
RubberBandPick | vtkInteractorStyleRubberBandPick |  |
RubberBandZoom | vtkInteractorStyleRubberBandZoom |  |
SelectAnActor | vtkPropPicker | Select an actor. |
SelectAVertex | vtkPointPicker | Click and drag a vertex of a vtkPolyData. |
ShiftAndControl | vtkRenderWindowInteractor | Hold/holding down a key. Check if shift or control is being held. |
StyleSwitch | vtkInteractorStyleSwitch | Choose between multiple interaction modes. |
TrackballActor | vtkInteractorStyleTrackballActor | Trackball actor mode. |
TrackballCamera | vtkInteractorStyleTrackballCamera | Trackball camera mode. |
UserEvent |  | Simple observer. Create, invoke, and handle a custom event. |
WorldPointPicker | vtkWorldPointPicker | Get world coordinates of mouse click. |

## Working with Images

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
Actor2D | vtkActor2D vtkMapper2D | 2D actor and mapper. |
BackgroundImage | vtkImageCanvasSource2D | Display an image as the background of a scene. |
BorderPixelSize | vtkImageSliceMapper | Set the size of border pixels. |
CannyEdgeDetector |  | Perform Canny edge detection on an image. |
Cast | vtkImageCast | Cast an image to a different type. |
DotProduct | vtkImageDotProduct | Compute the pixel-wise dot product of two vector images. |
DrawOnAnImage | vtkImageCanvasSource2D | Drawing on an image. |
DrawShapes | vtkImageCanvasSource2D | Drawing shapes in an image. |
ExtractComponents | vtkImageExtractComponents | Extract components of an image. This can be used to get, for example, the red channel of an image. |
FillWindow | vtkCamera | Fit imageSetup the camera to fill the window with an image. |
ImageAccumulateGreyscale | vtkImageAccumulate vtkBarChartActor | Display a grey scale histogram. |
ImageCheckerboard | vtkImageCheckerboard | Visually Compare Two Images. |
ImageCityBlockDistance | vtkImageCityBlockDistance | Compute the Manhattan distance from every point to every black point in a binary image. |
ImageDilateErode3D | vtkImageDilateErode3D | Dilate or erode an image. |
ImageExport | vtkImageExport | Export an image to a C array. |
ImageGridSource | vtkImageGridSource | Create a image of a grid. |
ImageHybridMedian2D | vtkImageHybridMedian2D | Median filter an image. |
ImageHistogram | vtkImageHistogram | Compute the histogram of an image. |
ImageIdealHighPass | vtkImageIdealHighPass | High pass filter an image. |
ImageImport | vtkImageImport | Import an image from a C array. |
ImageIslandRemoval2D | vtkImageIslandRemoval2D | Remove small patches from an image. |
ImageMagnify | vtkImageMagnify | Supersample and stretch an image. |
ImageMandelbrotSource | vtkImageMandelbrotSource | Create a Mandelbrot image. |
ImageMask | vtkImageMask | Mask a region of an image. |
ImageMathematics | vtkImageMathematics | Perform mathematical operations on an image. |
ImageMedian3D | vtkImageMedian3D | Median filter a 3d or 2d image. |
ImageMirrorPad | vtkImageMirrorPad | Pad the edges of an extended image by mirror existing pixels. |
ImageNonMaximumSuppression | vtkImageNonMaximumSuppression | Find peaks in an image using non maximum suppression. |
ImageOpenClose3D | vtkImageOpenClose3D | Open or close (morphologically) an image. |
ImageRFFT | vtkImageRFFT | Inverse FFT. |
ImageRange3D | vtkImageRange3D | Replace every pixel with the range of its neighbors according to a kernel. |
ImageRotate | vtkImageSlice vtkImageResliceMapper | Rotate a 2D image. This is even more powerful than vtkImageSliceMapper. It can also do oblique slices. |
ImageSeparableConvolution | vtkImageSeparableConvolution | Convolve a separable kernel with an image. |
ImageShiftScale | vtkImageShiftScale | Shift and scale an image. |
ImageSinusoidSource | vtkImageSinusoidSource | Create a sinusoidal image. |
ImageSliceMapper | vtkImageSlice vtkImageSliceMapper | Visualize and interact with an image. This is the new way to do this. It is much more powerful. |
ImageSlice | vtkImageSlice vtkImageResliceMapper | Visualize and interact with an image. This is even more powerful than vtkImageSliceMapper. It can also do oblique slices. |
ImageStack | vtkImageStack | Display layers of images. |
ImageStencil | vtkImageStencil vtkImageToImageStencil | Copy one image into another image. |
ImageText | vtkFreeTypeUtilities vtkImageBlend | Draw text in an image. |
ImageThreshold | vtkImageThreshold | Threshold an image. |
ImageToPolyDataFilter | vtkImageToPolyDataFilter vtkImageQuantizeRGBToIndex | Convert a vtkImageData to a vtkPolyData. |
ImageToStructuredPoints | vtkImageToStructuredPoints | Convert a vtkImageData to a vtkStructuredPoints. |
InteractWithImage | vtkImageActor vtkInteractorStyleImage | Visualize and interact with an image. |
Interpolation | vtkImageSlice vtkImageProperty | Set the interpolation type for the display of an image. If pixels look blurry instead of sharp when zoomed in, change this. |
MarkKeypoints | vtkVectorText vtkFollower | Mark keypoints in an image. |
NegativeIndices | vtkImageData | A very powerful feature of vtkImageData is that you can use negative indices. |
PickPixel2 | vtkPropPicker | Picking a pixel 2 - modified version for exact pixel values. |
PickPixel | vtkPropPicker | Picking a pixel. |
RTAnalyticSource | vtkRTAnalyticSource | An image source that can be used for regression testing |
StaticImage | vtkImageViewer2 | This will display the image, but not allow you to interact with it. |
Transparency | vtkImageMapToColors vtkLookupTable | Make part of an image transparent. |

## Image Processing

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
Colored2DImageFusion | vtkImageMapToColors | Blending 2D images with different color maps. |
CenterAnImage | vtkImageChangeInformation | Center an image. |
CombineImages | vtkImageBlend | Combine two images. |
CombiningRGBChannels | vtkImageAppendComponents | Combine layers into an RGB image. |
ImageMagnitude | vtkImageMagnitude | grayscaleConvert RGB image to grey scale. |
Flip | vtkImageFlip | Flip an image. |
Gradient | vtkImageGradient | Compute the gradient vector at every pixel. |
ImageAccumulate | vtkImageAccumulate | Histogram |
ImageAnisotropicDiffusion2D | vtkImageAnisotropicDiffusion2D | Anisotropic diffusion (2D). |
ImageContinuousDilate3D | vtkImageContinuousDilate3D | Dilate an image. |
ImageContinuousErode3D | vtkImageContinuousErode3D | Erode an image. |
ImageConvolve | vtkImageConvolve | Convolve an image with a kernel. |
ImageCorrelation | vtkImageCorrelation | Correlate two images. |
ImageDifference | vtkImageDifference | Compute the difference image of two images. |
ImageDivergence | vtkImageDivergence | Divergence of a vector field. |
ImageEllipsoidSource | vtkImageEllipsoidSource | Create an image of an ellipsoid. |
ImageFFT | vtkImageFFT | Compute the FFT of an image. |
ImageGaussianSmooth | vtkImageGaussianSmooth | Smooth an image. |
ImageGradientMagnitude | vtkImageGradientMagnitude | Compute the magnitude of the gradient at each pixel of an image. |
ImageLaplacian | vtkImageLaplacian | Compute the Laplacian of an image. |
ImageLuminance | vtkImageLuminance | Convert RGB image to greyscale (luminance). |
ImageMapToColors | vtkImageMapToColors | Use a lookup table to map scalar (gray scale) values to colorsConvert grey scale image to RGB. |
ImageNoiseSource | vtkImageNoiseSource | Create an image of noise. |
ImagePermute | vtkImagePermute | Switch axes of an image. |
ImageShrink3D | vtkImageShrink3D | Resample an image. |
ImageSobel2D | vtkImageSobel2D | Sobel edge detection 2D. |
ImageValueRange | vtkImageData | Get the range of image pixel values (min/max). |
ImageVariance3D | vtkImageVariance3D | Construct a new image consisting of the variance of the input image at each pixel. |
RGBToHSI | vtkImageRGBToHSI | Convert RGB to HSI. |
RGBToHSV | vtkImageRGBToHSV | Convert RGB to HSV. |
RGBToYIQ | vtkImageRGBToYIQ | Convert RGB to YIQ. |
RescaleAnImage | vtkImageShiftScale | Rescale an image |
ResizeImage | vtkImageResize vtkImageSincInterpolator | Resize an image using a sinc interpolator. |
ResizeImageDemo | vtkImageResize vtkImageSincInterpolator | Demonstrate allsinc interpolators to resize an image. |

## Widgets

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
PolygonalSurfacePointPlacer | vtkPolygonalSurfacePointPlacer | Used in conjunction with vtkContourWidget to draw curves on a surface. |
AffineWidget | vtkAffineWidget | Apply an affine transformation interactively. |
AngleWidget2D | vtkAngleWidget vtkAngleRepresentation2D | vtkAngleWidget + vtkAngleRepresentation2D. |
AngleWidget | vtkAngleWidget |  |
BalloonWidget | vtkBalloonWidget |  |
BiDimensionalWidget | vtkBiDimensionalWidget | When would you use this? |
BorderWidget | vtkBorderWidget | 2D selection, 2D box. |
BoxWidget2 | vtkBoxWidget2 |  |
BoxWidget | vtkBoxWidget |  |
CaptionWidget | vtkCaptionWidget |  |
CheckerboardWidget | vtkCheckerboardWidget vtkCheckerboardRepresentation | Compare two images using a checkerboard. |
ContourWidget | vtkContourWidget | Create a contour from a set of points and dynamically change the contour using the points as control points. |
Cursor2D | vtkCursor2D |  |
DistanceWidget | vtkDistanceWidget |  |
HoverWidget | vtkHoverWidget | How to detect a hover? |
ImagePlaneWidget | vtkImagePlaneWidget |  |
ImageTracerWidgetInsideContour | vtkImageTracerWidget | Highlight pixels inside a non-regular region scribbled on an image. |
ImageTracerWidgetNonPlanar | vtkImageTracerWidget | Draw on a non-planar surface. |
ImageTracerWidget | vtkImageTracerWidget | Scribble on an image. |
ImplicitPlaneWidget2 | vtkImplicitPlaneWidget2 | Clip polydata with an implicit plane. |
LineWidget2 | vtkLineWidget2 |  |
LogoWidget | vtkLogoWidget | Logo widget. |
OrientationMarkerWidget | vtkOrientationMarkerWidget | Display a polydata as an orientation icon. |
PlaneWidget | vtkPlaneWidget | Interact with a plane. |
RectilinearWipeWidget | vtkImageRectilinearWipe vtkRectilinearWipeWidget vtkRectilinearWipeRepresentation | Compare two images. |
SeedWidgetImage | vtkImageViewer2 vtkSeedWidget | How to start the interaction? |
SeedWidget | vtkSeedWidget | Seed widget. |
Slider2D | vtkSliderWidget vtkSliderRepresentation2D | 2D Slider. |
Slider | vtkSliderWidget vtkSliderRepresentation3D | 3D Slider. |
SphereWidget2 | vtkSphereWidget2 |  |
SphereWidgetEvents | vtkSphereWidget | Sphere widget events. |
SphereWidget | vtkSphereWidget | Sphere widget. |
SplineWidget | vtkSplineWidget |  |
TextWidget | vtkSeedWidget |  | vtkTextWidget
TexturedButtonWidget | vtkButtonWidget vtkTexturedButtonRepresentation2D | Create a textured 2D button. |

## Plotting

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BarChart | vtkChartXY | Bar chart. |
BoxChart | vtkChartBox | Box plot. |
Diagram |  |  |
LinePlot | vtkChartXY | Line plot. |
ParallelCoordinates | vtkChartParallelCoordinates | Parallel coordinates. |
PieChart | vtkChartPie vtkPlotPie | Pie chart. |
PieChartActor | vtkPieChartActor | Pie chart. |
ScatterPlot | vtkPlotPoints | Scatter plot. |
SpiderPlot | vtkSpiderPlotActor | Spider plot. |
StackedBar | vtkPlotBar | Stacked bar. |
StackedPlot | vtkPlotStacked | Stacked plot. |

## Animation

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
AnimateActors | vtkAnimationScene vtkAnimationCue | Animate actors. |
Animation | vtkRenderWindowInteractor | Move a sphere across a scene. |
AnimationScene | vtkAnimationScene vtkAnimationCue | Animation (the right way). Zoom in on a sphere. |
DataAnimation | vtkCallbackCommand vtkProgrammableFilter | Data Animation. Update points in a dataset every specified interval. |
DataAnimationSubclass | vtkCommand vtkProgrammableFilter | Update points in a dataset every specified interval (using a vtkCommand subclass instead of a callback function. |

## Geographic Visualization (Geovis)

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
CompassWidget | vtkCompassWidget | Compass Widget. |
EarthSource | vtkEarthSource | Create the Earth. |
GeoAssignCoordinates | vtkGeoAssignCoordinates | Convert lat/long coordinates to world coordinates. |

## Information Visualization (Infovis)

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
ParallelCoordinatesView | vtkParallelCoordinatesView | Parallel coordinates. |
TreeMapView | vtkTreeMapView | Tree map. |

## Qt

Click here for a tutorial on how to setup Qt.

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
BorderWidgetQt | vtkBorderWidget QApplication |  |
QtBarChart | vtkQtBarChart |  |
ShowEvent |  | Use QMainWindow::showEvent event to do things that you might want to do in the constructor |
EventQtSlotConnect | vtkEventQtSlotConnect | Connect a VTK event to a Qt slot. |
ImageDataToQImage |  | Convert a vtkImageData to a QImage. |
QImageToImageSource | vtkQImageToImageSource | Convert a QImage to a vtkImageData. |
RenderWindowNoUiFile | QVTKOpenGLWidget | 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 [[/Qt/RenderWindowUi | RenderWindowUi]]).
RenderWindowUIMultipleInheritance | QMainWindow | Using a QVTKOpenGLWidget with the Qt Multiple Inheritance model. |
RenderWindowUISingleInheritance | QMainWindow | Using a QVTKOpenGLWidget with the Qt Single Inheritance model. |
ShareCameraQt |  | Share the camera between QVTKOpenGLWidgets. |
SideBySideRenderWindowsQt | QApplication | Side by side render windows. |

## Matlab

You must turn on VTK_USE_MATLAB_MEX to use these.

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
MatlabEngineFilter | vtkMatlabEngineFilter |  |

## Databases

### SQL

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

Example Name | Classes Demonstrated | Description | Image
--- | --- | --- | ---
ConnectAndRead | vtkMySQLDatabase vtkSQLQuery | Connect to and read a MySQL database. |
CreateDatabase | vtkMySQLDatabase | Create a MySQL database. |
WriteToDatabase | vtkSQLQuery vtkMySQLDatabase | Write to a MySQL database. |

## RenderMan

RenderMan is a high quality rendering system created 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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
PolyDataRIB | vtkRIBExporter | Apply a RenderMan Shader to a PolyData. |

## 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 | Classes Demonstrated | Description | Image
--- | --- | --- | ---
FrenetSerretFrame | vtkFrenetSerretFrame | Compute tangent and normal vectors to a polyline. |
FrenetSerretFrameDemo | vtkFrenetSerretFrame | Uses vtkSplineWidget to interact with a spline. Shows how to control a pipeline inside a callback. |