Jonathan Shimwell

We have a few new workflows for getting to DAGMC geometry ```export_dagmc_h5m_file``` previously used gmsh to make a 2d and optionally conformal 3d surface mesh we can also make 2d...

added openmc activator

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@jbae11 we could add a link to your repo here

using id_map in model.plot for more efficient plotting

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# Description This PR makes use of the ```model.id_map``` when plotting. This avoids writing the png/ppm file and then reading the image back in with ```mpimg.imread```. I believe this is...

feature request model.voxel_plot

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## Description I have been using ```model.plot``` and ```geometry.plot``` for a while and was thinking it might be a good idea to add the equivalent functions for voxel plots. ```model.voxel_plot```,...

Python API not reading nuclear data ```interpolation``` and ```breakpoint``` correctly

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## Bug Description Reading in the h5 nuclear data with openmc appears to result in default ```interpolation``` and ```breakpoint``` values such as ```[2]``` ## Steps to Reproduce change the dir...

Adding material decay gamma dose

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# Description This PR adds a simplified gamma dose for a material. This allows users to find the dose at a distance from a gamma emitting material. In this implementation...

adding hdfvtk format export for all meshes

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## Description We can currently export mesh data to an asci format vtk file using mesh.write_data_to_vtk(). This makes use of an optional dependency vtk to write the asci vtk format...

Squashing nuclides with same percent units when adding nuclides to a material

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# Description This PR changes the behaviour of material.add_nuclide so that if a nuclide with the same name and percentage type exists in the material then the new nuclide will...

## Description I'm currently using the ```model.convert_to_multigroup``` method to make MGXS files for use in random ray FW-Cadis workflows. The[ three available methods](https://github.com/openmc-dev/openmc/blob/d700d395de02d95190eab35514f25f9ea29d516f/openmc/model/model.py#L1992-L2001) (stochastic_slab, infinite_medium and material_wise, all use neutron...