1/31/2024 0 Comments Paraview resample with dataset![]() Using a vtkStructuredGrid, we are able to maintain a spherical grid structure, enabling volume of interest (VOI) selection for certain radii or for latitudinal or longitudinal subsections. The Visualization Toolkit (VTK) does not have a native spherical grid structure for data based on spherical coordinates (R-, θ-, Φ). Some of the added features are generic enough to be used by other communities of users. This article provides details on the implementation of a selection of these filters as Python programmable filters. We expect to release Resample With Dataset with VTK 7.1 and ParaView 5.2.With the ability to write data sources and filters in Python code within a ParaView pipeline, we are able to quickly prototype added functionality that our geodynamic scientists are eager to use. Resample To Image is already available in VTK 7.0 and ParaView 5.1. Resample With Dataset and Resample To Image replace or supercede existing filters (“Resample With Dataset ” and “Image Resampling ”) that had inefficient implementations. The output of Resample To Image is distributed evenly among the processes. Like Resample With Dataset, Resample To Image can accept any type of DataSet or Composite DataSet as input and can work in parallel distributed environments. The right-hand side illustrates a volume rendering of the resampled data. ![]() The colors represent the distribution of the data among the nodes. The top-left portion shows Input (unstructured grid), and the bottom-left area displays the output Image-Data. For example, Resample To Image can resample an unstructured grid dataset to an Image-Data to efficiently volume-render the data. The Resample to Image filter can be used to convert any dataset to Image-Data before performing such operations. Some operations can be performed more efficiently on uniform grid datasets. In the properties panel for Resample To Image, unchecking “Use Input Bounds” allows the output bounds to be set manually. The output of the filter is an Image-Data. By default, the bounds are set to the bounds of the input dataset. It is possible to specify the bounds and extents of the uniform grid using the properties panel. The filter takes one input and samples its point and cell data onto a uniform grid of points. This filter is a specialization of Resample With Dataset. The right-hand side displays the result of applying the filter. The outline of Input is also shown in this view. The middle portion of the image shows a multiblock unstructured grid (Source). The left-hand side contains a multiblock tetrahedra mesh (Input). ParaView displays an example of Resample With Dataset. The output dataset will have the same distribution as Source. Resample With Dataset also works in parallel with distributed datasets. The output DataSet has the same structure as Source, and its point data contains the resampled values from Input. The filter samples the point and cell data of Input on the points of Source. This filter takes two inputs: Input and Source, which can be any DataSet or Composite DataSet type. Diy2 greatly simplifies the process of implementing parallel programs such as dataset resampling filters.įollowing is a brief description of the two filters and their usage in ParaView: Resample With Dataset It has built-in facilities for complex communication patterns like neighbor exchange and swap-reduce, and commonly used algorithms such as domain decomposition. Diy2 provides an abstraction over Message Passing Interface (MPI). The new filters are implemented using Diy2, a block-parallel library. In ParaView, these filters are called “Resample With Dataset” and “Resample To Image.” There are also parallel, distributed versions of these filters called vtkPResampleWithDataSet and vtkPResampleToImage. Under VTK, these filters are implemented in vtkResampleWithDataSet and vtkResampleToImage. These filters can sample the point and cell data of one dataset on to the points of another dataset. ![]() Recently, we added two new filters to the Visualization Toolkit (VTK) and ParaView.
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