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:

Callback¶

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

Camera¶

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.
ShareCamera	Use the same camera for all renderers.

Coloring¶

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

Glyphing¶

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

Image¶

Multiple view ports and render windows¶

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

Polydata¶

Random¶

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?¶

StructuredDataset¶

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.

Transforms¶

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.