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Python How To

Often you just need a "pointer" to an example that shows you how to do something.

Here are some snippets and examples that highlight interesting features that may help you:


Example Name Comments Image
CallBack Setting up a callback with client data. Two different methods are demonstrated.


Example Name Comments Image
CameraModel1 Illustrate camera movement around the focal point.
CameraModel2 camera movement centered at the camera position.
CameraOrientationWidget This 3D camera orientation widget can be used in conjunction with CameraPosition to get a nice camera position.
CameraPosition Get the camera position while moving the image.
ResetCameraOrientation Reset camera orientation to a previously saved orientation.
ShareCamera Use the same camera for all renderers.

Check the VTK Version

Example Name Comments Image
CheckVTKVersion-Snippet Check the VTK version returning True if the requested VTK version is >= the current version.
CheckVTKVersion-Example Check the VTK version and provide alternatives for different VTK versions.


Example Name Comments Image
ShareCamera Store background colors in a vector for later extraction of the red, green and blue components.


Example Name Comments Image
InteractorStyleTrackballCamera Here points are represented as glyphs.
PointToGlyph How to represent points as glyphs.


Example Name Comments Image
WriteImage Write out an image of various types.

Multiple view ports and render windows

Example Name Comments Image
MultipleRenderWindows Multiple Render Windows.
MultipleViewports Multiple Viewports.

Physically Based Rendering

Physically based rendering sets metallicity, roughness, occlusion strength and normal scaling of the object. Textures are used to set base color, ORM, anisotropy and normals. Textures for the image based lighting and the skymap are supplied from a cubemap.

Image based lighting uses a cubemap texture to specify the environment. A Skybox is used to create the illusion of distant three-dimensional surroundings.

The results can be quite spectacular, it is hoped that these examples will help you to get started.

Example Name Comments Image
PBR_Anisotropy Render spheres with different anisotropy values.
PBR_Clear_Coat Render a cube with custom texture mapping and a coat normal texture.
PBR_Edge_Tint Render spheres with different edge colors using a skybox as image based lighting.
PBR_HDR_Environment Renders spheres with different materials using a skybox as image based lighting.
PBR_Mapping Render a cube with custom texture mapping.
PBR_Materials Renders spheres with different materials using a skybox as image based lighting.
PBR_Materials_Coat Render spheres with different coat materials using a skybox as image based lighting.
PBR_Skybox Demonstrates physically based rendering, a skybox and image based lighting.
PBR_Skybox_Texturing Demonstrates physically based rendering, a skybox, image based lighting and texturing.
PBR_Skybox_Anisotropy Demonstrates physically based rendering, a skybox, image based lighting, and anisotropic texturing.


Example Name Comments Image
ReadPolyData This snippet works for most PolyData.


If you want to ensure that the same random points/colors are used in C++ and other languages then it is best to use vtkMinimalStandardRandomSequence.

Example Name Comments Image
HighlightWithSilhouette Here we use randomly positioned spheres with random colors. A vtkLookupTable is filled with random colors.

Render Windows

Example Name Comments Image
Model Multiple render windows.

Searching for relevant examples?

Example Name Comments Image
SelectExamples Given a VTK Class and a language, select the matching examples.


How to visualise the information in a structured dataset. All these examples use the combustor dataset.

Example Name Comments Image
CombustorIsosurface Generate an isosurface of constant flow density.
CutStructuredGrid Cut through structured grid with plane. The cut plane is shown solid shaded. A computational plane of constant k value is shown in wireframe for comparison. The colors correspond to flow density. Cutting surfaces are not necessarily planes: implicit functions such as spheres, cylinders, and quadrics can also be used.
ProbeCombustor Probing data in a combustor. Probes are regular arrays of 50 by 50 points that are then passed through a contouring filter.
PseudoVolumeRendering Here we use 100 cut planes, each with an opacity of 0.05. They are then rendered back-to-front to simulate volume rendering.
Rainbow Using different vtkLookupTables.
StreamLines Seed streamlines with vectors from a structured grid.
StreamlinesWithLineWidget Interact with the streamlines in the combustor dataset.
VelocityProfile Warping the geometry of three planes to show flow momentum.
WarpCombustor Carpet plots of combustor flow energy in a structured grid. Colors and plane displacement represent energy values.


Example Name Comments Image
Frog This code uses a general way of specifying transformations that can permute image and other geometric data in order to maintain proper orientation regardless of the acquisition order. See the class SliceOrder.