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32 lines
1.5 KiB
Markdown
32 lines
1.5 KiB
Markdown
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# update-CellLocatorTwoLevelUniformGrid
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`CellLocatorTwoLevelUniformGrid` has been renamed to `CellLocatorUniformBins`
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for brevity. It has been modified to be a subclass of `vtkm::cont::CellLocator`
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and can be used wherever a `CellLocator` is accepted.
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`CellLocatorUniformBins` can work with all kinds of datasets, but there are cell
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locators that are more efficient for specific data sets. Therefore, a new cell
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locator - `CellLocatorGeneral` has been implemented that can be configured to use
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specialized cell locators based on its input data. A "configurator" function object
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can be specified using the `SetConfigurator` function. The configurator should
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have the following signature:
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```c++
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void (std::unique_ptr<vtkm::cont::CellLocator>&,
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const vtkm::cont::DynamicCellSet&,
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const vtkm::cont::CoordinateSystem&);
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```
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The configurator is invoked whenever the `Update` method is called and the input
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has changed. The current cell locator is passed in a `std::unique_ptr`. Based on
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the types of the input cellset and coordinates, and possibly some heuristics on
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their values, the current cell locator's parameters can be updated, or a different
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cell-locator can be instantiated and transferred to the `unique_ptr`. The default
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configurator configures a `CellLocatorUniformGrid` for uniform grid datasets,
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a `CellLocatorRecitlinearGrid` for rectilinear datasets, and `CellLocatorUniformBins`
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for all other dataset types.
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The class `CellLocatorHelper` that implemented similar functionality to
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`CellLocatorGeneral` has been removed.
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