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IDProjectCategoryView StatusLast Update
0002168FreeCADBugpublic2018-09-11 20:56
ReporterDeepSOIC Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status closedResolutionsuspended 
Product Version0.15 
Fixed in Version0.18 
Summary0002168: Arch Section plane cut view: invisible sketcher symbols
DescriptionWhen 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 To ReproduceSteps:
1. open attachment section-sketch-nosymbols.FCStd
2. (if below 0.16.5117) Select Section, and toggle Cut View property off and on to enable slicing. (was another bug, fixed by yorik)
3. Edit Sketch.
Points are not rendered. Most of the constraints are not rendered. Only distance constraints, and all the edges are visible.

Additional InformationEven though points are not displayed, they can be selected (remaining invisible) and dragged with mouse.
Rotating the view a bit so that the sketch is viewed at an angle makes the invisible stuff appear.

forum thread: http://forum.freecadweb.org/viewtopic.php?f=3&t=11486

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
TagsArch, Coin3d, sketcher, upstream
FreeCAD Information

Activities

Kunda1

2017-12-15 20:42

administrator  

section-sketch-nosymbols-2.png (218,601 bytes)   
section-sketch-nosymbols-2.png (218,601 bytes)   

Kunda1

2017-12-15 20:43

administrator   ~0010609

@looo the remaining issue here is pivy related. Since you've forked it, care to take a look?

looo

2017-12-16 10:28

developer   ~0010610

I think this is related to markers of coin. I can reproduce the problem with pivy markers and a minimal clipping plane. There is a plane cutting, but somehow it is not at a correct height.

In my eyes a cutting plane should never effect a sketch and therefore for a sketch a cutting plane should be disabled.
This is definetly possible with opengl. (glEnable(GL_CLIP_PLANE0)) A nice implementation would be a coin node which can be placed infront of the sketch main seperator to stop the clipping algorythm.
FreeCAD objects should define a clipping mode-> solid clipping, normal clipping, no clipping) and place a clipping node infront of the specific scene.

Some ideas can be found here: (
https://forum.freecadweb.org/viewtopic.php?f=8&t=18188&hilit=clipping+plane&start=10#p170918
In my eyes this is another problem of FreeCAD which is not yet solved, but should be possible with some amount of work.

DeepSOIC

2018-09-11 20:56

developer   ~0011712

closing.
Although the bug is still there, Sketcher now offers a clipping plane that overcomes this bug.

Related Changesets

FreeCAD: master 4379846d

2015-06-23 02:58:56

yorik

Details Diff
Arch: Section planes now restore the view clipping when loaded Affected Issues
0002168
mod - src/Mod/Arch/ArchSectionPlane.py Diff File

Issue History

Date Modified Username Field Change
2015-06-23 09:18 DeepSOIC New Issue
2015-06-23 09:18 DeepSOIC File Added: section-sketch-nosymbols.FCStd
2015-06-23 09:18 DeepSOIC File Added: section-sketch-nosymbols.png
2015-06-23 11:26 DeepSOIC Tag Attached: Coin3d
2015-06-23 11:26 DeepSOIC Tag Attached: sketcher
2015-06-23 11:26 DeepSOIC Tag Attached: Arch
2017-03-24 00:13 Kunda1 Changeset attached => FreeCAD master 4379846d
2017-12-15 20:42 Kunda1 File Added: section-sketch-nosymbols-2.png
2017-12-15 20:42 Kunda1 File Added: section-sketch-nosymbols-2.FCStd
2017-12-15 20:42 Kunda1 File Deleted: section-sketch-nosymbols.png
2017-12-15 20:42 Kunda1 File Deleted: section-sketch-nosymbols.FCStd
2017-12-15 20:43 Kunda1 Note Added: 0010609
2017-12-15 20:43 Kunda1 Tag Attached: upstream
2017-12-16 10:28 looo Note Added: 0010610
2018-09-11 20:56 DeepSOIC Status new => closed
2018-09-11 20:56 DeepSOIC Resolution open => suspended
2018-09-11 20:56 DeepSOIC Fixed in Version => 0.18
2018-09-11 20:56 DeepSOIC Note Added: 0011712