Visualization regression due to 7.9.3

[adam-urbanczyk]

Something changed regarding edges due to 7.9.3 or VTK 9.5. It affects edge visibility in show, fig and the docs.

[lorenzncode]

I can reproduce the show, fig issue. I did not see an issue with the docs other than poor edge visibility depending on lighting/rotation?

https://cadquery.readthedocs.io/en/latest/examples.html#splitting-an-object

All edges are visible in this doc example. show does not display the circle edges:

[adam-urbanczyk]

Regarding docs, that is what I mean. I assume that the docs issue has a different root cause.

[lorenzncode]

I am getting a different cell type with master vs 2.7.0. See:

from cadquery.func import *
from collections import Counter

from vtkmodules.vtkCommonDataModel import (
    VTK_TRIANGLE,
    VTK_LINE,
    VTK_VERTEX,
    VTK_POLY_LINE,
)

VTK_TYPE_NAMES = {
    VTK_VERTEX: "VTK_VERTEX",
    VTK_LINE: "VTK_LINE",
    VTK_POLY_LINE: "VTK_POLY_LINE",
    VTK_TRIANGLE: "VTK_TRIANGLE",
}


res = face(circle(10))

data = res.toVtkPolyData(1e-3, 0.1)
celltypes = Counter(data.GetCellType(i) for i in range(data.GetNumberOfCells()))

print({VTK_TYPE_NAMES.get(k, k): v for k, v in celltypes.items()})

old:
{'VTK_VERTEX': 1, 'VTK_LINE': 252, 'VTK_TRIANGLE': 124}

new:
{'VTK_VERTEX': 1, 'VTK_POLY_LINE': 2, 'VTK_TRIANGLE': 124}