Electric field monitor for Charge

[marc-flex]

Greptile Summary

Adds electric field monitoring capabilities to the Charge simulation module, enabling visualization and analysis of steady-state electric fields through a new SteadyElectricFieldMonitor class and associated data structures.

• Added SteadyElectricFieldMonitor in tidy3d/components/tcad/monitors/charge.py to monitor Ex, Ey, Ez components
• Implemented SteadyElectricFieldData class in tidy3d/components/tcad/data/monitor_data/charge.py handling electric field data with proper unit conversion (V/μm)
• Added _cell_to_point_data utility in UnstructuredGridDataset for VTK-based cell-to-point data conversion
• Added comprehensive test suite validating electric field monitoring for tetrahedral and triangular grids

[github-actions]

Diff Coverage

Diff: origin/develop...HEAD, staged and unstaged changes

• tidy3d/components/data/unstructured/base.py (42.9%): Missing lines 577-579,581
• tidy3d/components/tcad/data/monitor_data/charge.py (100%)
• tidy3d/components/tcad/monitors/charge.py (100%)

Summary

• Total: 36 lines
• Missing: 4 lines
• Coverage: 88%

tidy3d/components/data/unstructured/base.py

  573         vtk_obj,
  574     ):
  575         """Get point data values from a VTK object."""
  576 
! 577         cellDataToPointData = vtk["mod"].vtkCellDataToPointData()
! 578         cellDataToPointData.SetInputData(vtk_obj)
! 579         cellDataToPointData.Update()
  580 
! 581         return cellDataToPointData.GetOutput()
  582 
  583     @classmethod
  584     @requires_vtk
  585     def _get_values_from_vtk(

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[greptile-apps]

_{7 files reviewed, 4 comments
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[greptile-apps]

logic: No validation for correct data type (IndexedVoltageDataArray) unlike SteadyFreeCarrierData and SteadyEnergyBandData