Arch Section plane cut view: invisible sketcher symbols (bug)

[DeepSOIC]

Hi. I want to report a bug I encountered quite a while ago.
When editing sketches and there are revolution features present, it is often handy to cut those revolutions so that they don't obscure parts of the sketch. However, when doing so, sketcher points and constraint symbols (not text) become invisible. I am aware that sketcher stuff, when editing, is slightly raised, so I tried raising the section plane by 10mm, but it doesn't help. What does help is viewing the sketch at an angle (even a small angle is often enough.

Steps:
1. open attachment

section-sketch-nosymbols.FCStd

(9.85 KiB) Downloaded 45 times

2. Select Section, and toggle Cut View property off and on to enable slicing. (the requirement to do so is another bug, IMO)
3. Edit Sketch.
Points are not rendered, and so are most of the constraints. Only distance constraints, and all the edges are visible.

section-sketch-nosymbols.png (213.48 KiB) Viewed 2240 times

OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.16.5112 +17 (Git)
Build type: Release
Branch: (detached from abdullah/solver_control_information_5)
Hash: dc7dc09fb53010bb1b3129061b1a21f5e43fc7e7
Python version: 2.7.8
Qt version: 4.8.6
Coin version: 4.0.0a
OCC version: 6.7.1

[yorik]

Hm indeed! This might be hard to solve, as it happens fully inside the coin3D space...
As for the need to reset the section plane property by hand, I just fixed that with git commit 4379846

[DeepSOIC]

Thanks yorik! This was the minor bug part of the story... I'll put the major part into mantis, then.

EDIT:
issue #0002168

[Kunda1]

issue #0002168

Is this rest of the ticket still valid ?

[DeepSOIC]

Is this rest of the ticket still valid ?

yes, still points are removed by section plane. Yorik said it's a coin bug most likely, so I don't know what to do about it.

[Kunda1]

Is this rest of the ticket still valid ?

yes, still points are removed by section plane. Yorik said it's a coin bug most likely, so I don't know what to do about it.

Time to make an upstream ticket?

[yorik]

Time to make an upstream ticket?

I don't think there are many people left working on coin unfortunately. Besides, the bug should first be isolated into something not FreeCAD-specific so it can be seen without FreeCAD. Otherwise the chances to interest someone to it are zero.