VTK 9.6 deprecated `vtkCellArray.GetData()`

[banesullivan]

trame-vtk/src/trame_vtk/modules/vtk/serializers/data.py

Lines 43 to 65 in ce0e2ed

	if dataset.GetVerts() and dataset.GetVerts().GetData().GetNumberOfTuples() > 0:
	_verts = get_array_description(dataset.GetVerts().GetData(), context)
	properties["verts"] = _verts
	properties["verts"]["vtkClass"] = "vtkCellArray"
	# Lines
	if dataset.GetLines() and dataset.GetLines().GetData().GetNumberOfTuples() > 0:
	_lines = get_array_description(dataset.GetLines().GetData(), context)
	properties["lines"] = _lines
	properties["lines"]["vtkClass"] = "vtkCellArray"
	# Polys
	if dataset.GetPolys() and dataset.GetPolys().GetData().GetNumberOfTuples() > 0:
	_polys = get_array_description(dataset.GetPolys().GetData(), context)
	properties["polys"] = _polys
	properties["polys"]["vtkClass"] = "vtkCellArray"
	# Strips
	if (
	dataset.GetStrips()
	and dataset.GetStrips().GetData().GetNumberOfTuples() > 0
	):
	_strips = get_array_description(dataset.GetStrips().GetData(), context)

trame-vtk/src/trame_vtk/modules/vtk/serializers/mesh.py

Line 88 in ce0e2ed

return b64_encode_numpy(vtk_to_numpy(array.GetData()))

These should use GetOffsetsArray() / GetConnectivityArray()

[jourdain]

That is going to be tricky as vtk.js is still using a single array with interleave offset and index.

[user27182]

You can still use the legacy format, just need to ask for it explicitly:

vtkPolyData().GetPolys().ExportLegacyFormat(arr := _vtk.vtkIdTypeArray())