# Python Examples

Please see this page to learn how to setup your environment to use VTK in Python.

It would be appreciated if there are any Python VTK experts who could convert any of the c++ examples to Python!

## Hello World

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

## Simple Operations

Example Name | Classes Demonstrated | Description
--- | --- | ---
DistanceBetweenPoints | vtkMath::Distance2BetweenPoints |

## Input and Output

### Output

Example Name | Classes Demonstrated | Description
--- | --- | ---
PLYWriter | vtkPLYWriter |
STLWriter | vtkSTLWriter |

### Input

Example Name | Classes Demonstrated | Description
--- | --- | ---
STLReader | vtkSTLReader |
UnstructuredGridReader | vtkUnstructuredGridReader | Using vtkUnstructuredGridReader to read a (legacy) *.vtk file
VTPsReader | vtkXMLPolyDataReader |

## Working with Arrays

Example Name | Classes Demonstrated | Description
--- | --- | ---
GetValues | GetTuple3 |
RenameArray | SetName |

## Geometric Objects

### Display

Example Name | Classes Demonstrated | Description
--- | --- | ---
Arrow | vtkArrowSource |
Axes | vtkAxesActor |
Cell3DDemonstration | vtkHexagonalPrism vtkHexahedron vtkPentagonalPrism vtkPolyhedron vtkPyramid vtkTetra vtkVoxel vtkWedge vtkUnstructuredGrid | Sample objects are generated from the classes derived from vtkCell3D and displayed.
ColoredLines | vtkCellData vtkLine |
Cone | vtkConeSource |
Cube | vtkCubeSource |
Cylinder | vtkCylinderSource |
DataSetSurface | vtkDataSetSurfaceFilter |
Disk | vtkDiskSource | A circle with a hole in it.
Frustum | vtkFrustumSource |
GeometricObjectsDemo |  |
Hexahedron | vtkHexahedron |
LineSource | vtkLineSource |
LongLine | vtkLine |
OrientedArrow | vtkArrowSource |
Plane | vtkPlaneSource |
PlanesIntersection | vtkPlanesIntersection |
Planes | vtkPlanes, vtkHull | We create a convex hull of the planes for display purposes.
PlatonicSolid | vtkPlatonicSolidSource | All five platonic solids are displayed.
PointSource | vtkPointSource |
Point | vtkPoints |
Polyline | vtkPolyLine | This example demonstrates how to create a polygon through several ordered points.
PolygonIntersection | vtkPolygon | IntersectWithLine()
Polygon | vtkPolygon |
Pyramid | vtkPyramid |
Quad | vtkQuad |
RegularPolygonSource | vtkRegularPolygonSource |
Sphere | vtkSphereSource |
Tetrahedron | vtkTetra |
TextActor | vtkTextActor | 2D "HUD-type" text
TriangleStrip | vtkTriangleStrip |
Triangle | vtkTriangle |
Vertex | vtkVertex |

### Parametric Objects

Example Name | Classes Demonstrated | Description
--- | --- | ---
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.
ParametricObjects |  | Uncomment the object that you wish to be displayed.

## Implicit Functions

Example Name | Classes Demonstrated | Description
--- | --- | ---
Boolean | vtkImplicitBoolean | Demonstrate booleans of two different implicit functions
Quadric | vtkQuadric | Create an ellipsoid using an implicit quadric
Sphere | vtkSphere | Demonstrate sampling of a sphere implicit function

## Working with PolyData

Example Name | Classes Demonstrated | Description
--- | --- | ---
BooleanOperationPolyDataFilter | vtkBooleanOperationPolyDataFilter | This example performs a boolean operation (Intersection, Union, Difference) of two PolyData
ColoredTriangle | vtkTriangle |
CombinePolyData | vtkAppendPolyData | This example combines Polydata objects, and displays the result to the screen.
Cube | vtkPolyData |
CurvaturesDemo | vtkCurvatures, vtkColorTransferFunction | Demonstrates how to get the Gaussian and Mean curvatures of a surface.
DottedLine | vtkActor::GetProperty::SetLineStipplePattern |
FilledPolygon | vtkCutter |
ImplicitPolyDataDistance | vtkImplicitPolyDataDistance |
IterativeClosestPoints | vtkIterativeClosestPointTransform |
KochSnowflake | vtkPolyData, vtkCellArray, vtkPoints, vtkPolyLine | This example draws a Koch snowflake fractal using recursive functions and some of the convenient tools in the toolkit.
LineOnMesh | vtkCellLocator, vtkParametricSpline |
MeshLabelImageColor | vtkDiscreteMarchingCubes |
Outline | vtkOutlineFilter |
PolyDataContourToImageData | vtkLinearExtrusionFilter,vtkPolyDataToImageStencil |
PolyDataToImageDataStencil | vtkPolyDataToImageStencil |
RotationAroundLine | vtkTransformPolyDataFilter |
RuledSurfaceFilter | vtkRuledSurfaceFilter |
SmoothMeshGrid | vtkLoopSubdivisionFilter | vtkButterflySubdivisionFilter
SolidColoredTriangle | vtkTriangle |
TriangleColoredPoints | vtkUnsignedCharArray |
TriangleCornerVertices | vtkCellArray |
TriangleCorners | vtkXMLPolyDataWriter |
WarpVector | vtkLine, vtkDoubleArray, vtkPolyData, vtkWarpVector | This example warps/deflects a line.
WriteTriangleToFile | vtkTriangle |

## Working with 3D Data

Example Name | Classes Demonstrated | Description
--- | --- | ---
ExtractSelection | vtkExtractSelection |
ExtractSelectionCells | vtkExtractSelection | extract cell, select cell

### Working with Structured 3D Data

This section includes vtkImageData, vtkStructuredGrid, and vtkRectilinearGrid.

Example Name | Classes Demonstrated | Description
--- | --- | ---
RectilinearGrid | vtkRectilinearGrid | create a rectilinear grid

### Working with Meshes

This section includes examples of manipulating meshes.

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

## Miscellaneous

Example Name | Classes Demonstrated | Description
--- | --- | ---
BackgroundImage | vtkJPEGReader, vtkImageCanvasSource2D, vtkImageActor, vtkSuperquadricSource |
Cutter | vtkCutter |
ImplicitDataSet | vtkImplicitDataSet]( vtkIdType | n/a
Screenshot | vtkWindowToImageFilter |
Variant | vtkVariant |
vtkVersion | vtkVersion |

## Visualization

Example Name | Classes Demonstrated | Description
--- | --- | ---
Animation | vtkTimerCallback |
AssignCellColorsFromLUT | vtkNamedColors, vtkPlaneSource, vtkLookupTable, vtkColorTransferFunction | Demonstrates how to assign colors to cells in a vtkPolyData structure using lookup tables.
Camera | vtkCamera |
ClampGlyphSizes | vtkGlyph3D | Use vtkGlyph3D with ClampingOn to limit glyph sizes
ColorActor | vtkActor::GetProperty()::SetColor |
CubeAxesActor | vtkCubeAxesActor |
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.
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.
GlyphTable | vtkGlyph3D | Vary the shapes of glyphed points using a glyph table
HardwareSelector | vtkHardwareSelector |
InteractorStyleTrackballActor | vtkInteractorStyleTrackBallActor |
InteractorStyleTrackballCamera | vtkInteractorStyleTrackBallCamera |
MultipleViewports | vtkRenderer::SetViewport |
NamedColorPatches | vtkNamedColors | Creates a HTML file called [VTKNamedColorPatches]((http://htmlpreview.github.com/?https://github.com/lorensen/VTKExamples/blob/master/src/Python/Visualization/VTKNamedColorPatches.html) showing the available colors in the vtkNamedColors class.
NamedColors | vtkNamedColors | Demonstrates how to use the vtkNamedColor class
PointDataSubdivision | vtkLinearSubdivisionFilter vtkButterflySubdivisionFilter | Demonstrates the effect of applying these filters on various sources.
PointSize | vtkActor::GetProperty()::SetPointSize |
ProgrammableGlyphs | vtkProgrammableGlyphFilter | Vary the shapes of glyphed points using a programmable glyph filter
QuadraticSurface | vtkQuadric |
SphereTexture | vtkTextureMapToSphere | Apply an ImageData texture to an sphere
Streamlines | vtkStreamLine | Seed streamlines with vectors from a structured grid
TextSource | vtkTextSource |
UnstructuredTransientVolumeRendering | vtkUnstructuredGridVolumeRayCastMapper |
WindowTitle | vtkRenderWindow::SetWindowName |

## Working with vtkImageData

Example Name | Classes Demonstrated | Description
--- | --- | ---
ImageWeightedSum | vtkImageWeightedSum |
SumVTKImages | vtkImageWeightedSum | A function to simplify the summing of images, where you can pass a list of images and
WriteReadVtkImageData | vtkImageData, vtkXMLImageDataReader, vtkXMLImageDataWriter |

## Working with ExodusII Data

Example Name | Classes Demonstrated | Description
--- | --- | ---
ReadExodusData | vtkExodusIIReader | A simple script for reading and viewing ExodusII data interactively.

## Graphs

Example Name | Classes Demonstrated | Description
--- | --- | ---
EdgeWeights | vtkMutableDirectedGraph, vtkGraphLayoutView |
NOVCAGraph | vtkUnstructuredGrid, vtkXMLUnstructuredGridWriter |
SelectedVerticesAndEdges | vtkAnnotationLink, vtkGraphLayoutView |
VisualizeGraph | vtkMutableDirectedGraph, vtkGraphLayoutView |

## User Interaction

Example Name | Classes Demonstrated | Description
--- | --- | ---
HighlightPickedActor | vtkPropPicker, vtkInteractorStyleTrackballCamera | Pick and highlight an actor based on mouse clicks.
MouseEventsObserver | vtkCallbackCommand | Use an observer.
MouseEvents | vtkInteractorStyleTrackballCamera | Subclass the interactor style.

## Infovis

Example Name | Classes Demonstrated | Description
--- | --- | ---
ParallelCoordinatesExtraction | vtkExtractSelection, vtkAnnotationLink | Extract data based on a selection in a Parallel Coordinates View
ParallelCoordinatesView | vtkRTAnalyticSource, vtkParallelCoordinatesView, vtkParallelCoordinatesRepresentation | Plotting data attributes in a Parallel Coordinates View
ScatterPlot | vtkChartXY |
SelectedGraphIDs | vtkAnnotationLink, vtkRandomGraphSource, vtkGraphLayoutView | Callback on vtkAnnotationLink in a Graph Layout View when selection is changed
SpiderPlot | vtkSpiderPlotActor |

## Geovis

Example Name | Classes Demonstrated | Description
--- | --- | ---
GeoAssignCoordinates | vtkGeoAssignCoordinates, vtkMutableDirectedGraph, vtkGraphMapper | Draws a sphere, based on longituds and latitudes.

## Widgets

Example Name | Classes Demonstrated | Description
--- | --- | ---
BalloonWidget | vtkBalloonWidget, vtkBalloonRepresentation | Uses a vtkBalloonWidget to draw labels when the mouse stays above an actor.
BoxWidget | vtkBoxWidget | This 3D widget defines a region of interest that is represented by an arbitrarily oriented hexahedron with interior face angles of 90 degrees (orthogonal faces). The object creates 7 handles that can be moused on and manipulated.
CompassWidget | vtkCompassWidget, vtkCompassRepresentation | Draws an interactive compass.
ContourWidget | vtkContourWidget, vtkOrientedGlyphContourRepresentation | Draw a contour (line) which can be deformed by the user
OrientationMarkerWidget | vtkAnnotatedCubeActor vtkOrientationWidget | Draws two cubes. One of them can be clicked to be rotated, and will rotate the second one. The second one has annotations on it, and can also be moved.
ScalarBarWidget | vtkScalarBarWidget | The ScalarBarWidget displays a scalar bar that is movable and changes orientation automatically when close to the borders of the image. It needs a ScalarBarActor
SphereWidget | vtkSphereWidget | This 3D widget defines a sphere that can be interactively placed in a scene.
TextWidget | vtkTextWidget | Annotate a VTK image with movable text

## Utilities

Example Name | Classes Demonstrated | Description
--- | --- | ---
Delaunay2D | vtkDelaunay2D |
LUTUtilities | vtkLookupTable vtkColorSeries | A utility class for vtkLookupTable allowing you to output the table contents or to compare tables.

## PyQt

Example Name | Classes Demonstrated | Description
--- | --- | ---
EmbedInPyQt | vtkRenderWindowInteractor | Shows how to easily embed VTK in PyQt with QVTKRenderWindowInteractor, first example
EmbedInPyQt2 | vtkRenderWindowInteractor | Shows how to embed VTK in PyQt with QVTKRenderWindowInteractor, second example