Name of a solid in a compound - from selection

[HoWil]

Good morning,

I need to improve the following script which allows for listing all elements below a cursor-click: https://forum.freecadweb.org/viewtopic. ... or#p151950

The goal is to click on e.g. a Face of a Fusion of two Solids and get all elements/objects below the click. I want to list the Faces below the cursor, the Fusion itself, and the two Solids, at least the one below the cursor.

I get the Faces and the Compound from element_list in the script below. The Solids inside the Compound can also be listed.

The only thing I miss is how can I identify these solids. How do I get their Label/Name to select them... in the case below the Label/Name of 's'.

Code: Select all

pos = (0, 0) # The compound in question has to be positioned at the lower left corner of the 3D-view-Window !!!!!!!!
element_list = FreeCADGui.ActiveDocument.ActiveView.getObjectsInfo((int(pos[0]), int(pos[1])))
e = element_list[0]

label_object = str(e["Object"]) # the label of e.g. the compound
label_component = str(e["Component"]) # the label of e.g. a face

compound = FreeCAD.ActiveDocument.getObject(label_object)
solids = compound.Shape.Solids
s = solids[0] # How do I identify this solid; how do I get its label???

I also included a min. .fcstd ... please use it as shown in the screenshot.

Element_selector_test_case_min.fcstd

(5.04 KiB) Downloaded 40 times

how to get a label/name of s ??

Screenshot from 2017-03-16 08-32-26.png (224.11 KiB) Viewed 2443 times

Thanks in advance,
HoWil

[HoWil]

Is there maybe also an easier way to to the requested.... find all solids, compounds,... a face/edge belongs to??
BR,
HoWil

[mario52]

hi

try this macro Macro_FCInfo

mario

[HoWil]

hi

try this macro Macro_FCInfo

mario

Dear Mario,
Thx for the info but it also only lists the name of the compound and not the solid of which the compound is made of:

FCInfo dialog and FC-Selection-view showing only 'BooleanFragments001' and 'Compound'.

Screenshot from 2017-03-16 14-23-39.png (255.26 KiB) Viewed 2410 times

In the dialogs of FEM-mesh-group and FEM-material-assignment one get the info

FEM-mesh-group dialog showing the needed information.

Screenshot from 2017-03-16 14-25-11.png (215.64 KiB) Viewed 2410 times

but I do not found the needed information in the code.

BR,
HoWil

[DeepSOIC]

Hi!
This problem is very much related to toponaming. OpenCascade does provide this information, and FreeCAD uses it to make face colors go through Boolean operations. However, none of that functionality is exposed to python so far.

[mario52]

hi
the text "BooleanFragment001" is long for the textedit try with the mouse in the text edit to see the complete name

the code for this is:

Code: Select all

sel = FreeCADGui.Selection.getSelection()
object_Name  = sel[0].Name 
App.Console.PrintMessage("object_Name    : "+str(object_Name)+"\n\n")

SubElement = FreeCADGui.Selection.getSelectionEx()
subElementName = Gui.Selection.getSelectionEx()[0].SubElementNames[0]
App.Console.PrintMessage("subElementName : "+str(subElementName)+"\n")

sel = FreeCADGui.Selection.getSelection()
object_Label = sel[0].Label
App.Console.PrintMessage("object_Label   : "+(object_Label)+"\n")

(see Code_snippets)

mario

[HoWil]

Dear mario,
It is more about the Solid3 in the BooleanFragments001 than the BF itself The solids are newly named in a e.g. BooleanFragment and that name is needed.

Can you extract Solid3 from the selection in the given example

Attached also the demo file incorporating the BooleanFragments of the Cylinder and the Cube:

Element_selector_test_case_bf.fcstd

(7.02 KiB) Downloaded 29 times

BR,
HoWil

[mario52]

hi
There is no object named Solid3
(i have unziped with "Project utility.."

mario

[HoWil]

Let me explain it from an other view.

In the attached .fcstd above, there were tow solids 'merged' in a BooleanFragments-operation. This operation yields three! separate Solids since the intersecting domain is seen as new solid. This three solids can be found with the script-snippet from my first post see....

Three solids in the BooleanFragments object.

Screenshot from 2017-03-16 19-14-25.png (174.11 KiB) Viewed 2358 times

Here the original two solids were called:
Cylinder, Cube (see the Tree-View in the left part of the screenshot)
And the newly created three solids are listed without names in the Python console in the lower right part of the screenshot.

Now I would need the Labels of these three new solids.

Hope this helps understanding what I need to achieve.

BR,
HoWil

[DeepSOIC]

From Boolean fragments, it is technically possible to look up the original, but it requires a bit of rewrite of the tool. BooleanFramgents is just a feature around Part.Shape.generalFuse, which gives the source information along with the three solids. BooleanFragments simply discards that information. All other tools, such as connect, slice, and xor use that information to figure out, which fragments go to result and which are discarded.