I think Lattice2 has a memory leak. I left a model open over night and my machine was almost unusable in morning. I have 16GB and FreeCAD had almost all of it.

I closed and reopened FreeCAD and the model and the memory started to creep up immediately. After playing with it some, I've observed the following:

1. It doesn't start consuming memory just by loading the workbench
2. It's related to a placement object. Once a placement is added, it starts to leak.
3. More placements == faster leak.
4. closing the document doesn't release the memory. Have to close FreeCAD.

I created a simple rectangular pad, added a placement to the corner and it leaks roughly 3MB/Minute

Here's my FreeCAD info. This is basically the master branch as of yesterday with a some python only changes in Path. I can re-verify with a clean build of master if necessary.

OS: Debian GNU/Linux buster/sid (i3/i3)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.16726 +1 (Git)
Build type: Unknown
Branch: (HEAD detached at mlampert/feature/4th-axis-setup)
Hash: 599ed42f7968cb90811e73e94c7c60ead7ee3484
Python version: 3.7.3rc1
Qt version: 5.11.3
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

Cannot find icon: :/icons/Lattice2_ScLERP.svg

Lattice2 has grown to be quite large. Manual testing is too hard now.

I have just installed Lattice2 (thanks for this!) with FreeCAD V0.16 build 6712 but it appears that the lock and unlock recompute buttons are permanently greyed out. This has been confirmed by another user. Possible regression?

as the title says

I am trying to generate a series of sketches with one varied parameter (diameter of a circle). I had no problem getting it to work in a "tryout" document. But when I did the same in a document where I actually wanted to use it, I get the following error message:

  File "L:\*****\AppData\Roaming\FreeCAD\Mod\lattice2\lattice2BaseFeature.py", line 148, in execute
    plms = self.derivedExecute(obj)
  File "L:\*****\AppData\Roaming\FreeCAD\Mod\lattice2\lattice2ParaSeries.py", line 207, in derivedExecute
    doc2.copyObject(screen(selfobj.Object), True)
<class 'RuntimeError'>: {'sclassname': 'class Base::RuntimeError', 'sErrMsg': 'Document must be saved at least once before link to external objects', 'sfile': '', 'iline': 0, 'sfunction': '', 'swhat': 'Document must be saved at least once before link to external objects', 'btranslatable': False, 'breported': False}

Did take me quite some time and tries to find what causes this issue. But in the end it is the simple fact that a link to a body in another document breaks the ParaSeries. It does not matter where the link is in the document tree, neither does it matter where the ParaSeries is or if it has any relation to the linked object. Deleting all external links makes the ParaSeries work as expected.

OS: Windows 10 (10.0)
Word size of FreeCAD: 64-bit
Version: 0.20.Unknown
Build type: Release
Python version: 3.9.7
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.3
Locale: German/Austria (de_AT)

Hello,
Is there a possibility to somehow at least indirectly via some workaround use linked PD body in LatticePattern? Trying to use it directly like normal PD body ends with Feature Link is not a PartDesign feature. Unsupported.
If it really can't be used right now would you consider adding a support for linked PD bodies in future?

When I try to use a value from a FC spreadsheet for the "Count" property of e.g. the PolarArray then the following exception is thrown:
<Exception> Invalid type 'l' in property binding 'Count' 11942.7 <App> Document.cpp(3693): Failed to recompute ArrayTest#PolarArray: Invalid type 'l' in property binding 'Count'

it does work in FC 0.18, though.

I've also figured out a hack to work around this issue in FC 0.19. When I add a unit symbol like "mm" at the end of the number in the spreadsheet, then I can use it for the "Count" property. It will only issue a warning that the unit symbol will be stripped.

OS: Gentoo/Linux (GNOME/gnome)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.20655 (Git) AppImage
Build type: Release
Branch: master
Hash: e8e67e8c5ebbc9f9ed9ea67aba5b891969595ece
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United States (en_US)

OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24267 +99 (Git)
Build type: Release
Branch: Branch_0.19.3
Hash: 6530e364184ce05ccff39501e175cf2237e6ee4b
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.3
Locale: English/Australia (en_AU)

The Attached Video & File might confirm a bug, Works fine on full circle - however I've exhausted all options on a semicircle to get the chain to offset. The polar array does move with Offset, however the parts fail to rebuild.

https://youtu.be/KRElDkAlpYc
https://drive.google.com/file/d/1s2V_Wm77bde4UPMKmBb_Uz8H78vEYWfn/view?usp=sharing

FreeCAD 0.18.1 complains when I try to use Lattice2:

invalid literal for int() with base 10: '18.1'

It seems that lattice2's version check does not understand x.x.x format.

I can select the number field - but the number of elements will not change, but always remain "5". - Arrows right hand side are grayed out.

OS: Ubuntu 18.04 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.14061 (Git)
Build type: None
Branch: master
Hash: c4fc02cbcfff975712e977dc08f859fba71ba0ad
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: German/Germany (de_DE)

Great WB, bthw. Can really do awesome things!

Cheers,
Wolf

Menu recompute has 2 items with the same shortcut Shift+F5

Both Force recompute and Touch selected features have the same shortcut

I have lattice2 integrated into my pluginmanager.
only this small error:

Cannot find icon: :/icons/Lattice2_ShapeInfoFeature.svg
Cannot find icon: :/icons/Lattice2_ExposeLinkSub.svg

Report view is giving me this
Cannot find icon: :/icons/Lattice2_ScLERP.svg

After setting Values Source to "Values Property", editing Values list,
then clicking "OK", the list is collapsed into one value.
Initially, the list appears good, only after editing is it corrupted.
Oddly, editing the corrupted list by separating the values with <CR>
has no effect.
AND, If corrupted list is edited adding only a comma (no <CR>) between values, list is stored properly again.

I'm using freecad-daily...

OS: Ubuntu 16.04.5 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.14498 (Git)
Build type: Release
Branch: master
Hash: e381e6b739a6b83b5f476546b64569cfa03a4e3a
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

Please see FreeCAD/FreeCAD-addons#200

BTW, @DeepSOIC can you also do the same fo PartoMagic WB? 😜

Requires two part fix

1. quick fix - display right message
2. implement bounding box for arrays of placements

development branch:

https://github.com/DeepSOIC/Lattice2/tree/reference-placement

todo:

• basic API

• visualization

• support in features:

  • single placement(s)
  • attached array
  • array from shape
  • linear array
  • polar array
  • invert
  • join arrays
  • array filter.
  • project array
  • interpolate array
  • populate copies
  • [halfway there] populate children
  • mirror
  • paraseries
  • toposeries

• review all CS choices in reference placement recomputes

• populate to align reference placements?

• change command logic of:

  • populate copies
  • populate children
  • new icons, maybe?

• new features:

  • extract reference
  • override reference
  • mover object

• update documentation:

  • add it to introduction
  • basic tutorial
  • check other tutorials
  • feature documentation

• testing:

  • Py3
  • PartDesign
  • old projects

• fix edit attached placement by doubleclick
• change attached-array default referencing option to "first"

Lattice3:

• change to new-style module

• change icon

• new features:

  • Link-style array support
  • Array from LinkArray

... from https://github.com/DeepSOIC/Lattice2/wiki/Gallery (top of the README) in order to assist comprehension of the written text description. Thanks!

I am changing the Z placement of a PolarArray feature but it keeps resetting it to 0. Is it right?

The features are not being generated too (maybe because of the wrong z-placement). So, I am adding z=18, for instance, but after the refresh, it will be moved to z=0 again.

Am I doing something wrong or this is a bug?

The base feature is the small whitish trapezoidal form (top-left)

Current settings are these.

1. New sketch, XZ plane (not XY), with offset 10 mm or so.
2. Draw some lines
3. Lattice Subelement any vertex. The vertex ends up seriously off the sketch.

Sure, here it is (but I think you already saw it in Freecad Forum)
lattice_polar_array.zip

I was not using the latest version of Lattice2, now I am using, and I am seeing this

Traceback (most recent call last):
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2BaseFeature.py", line 148, in execute
    plms = self.derivedExecute(obj)
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 119, in derivedExecute
    self.updateReadonlyness(selfobj)
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 103, in updateReadonlyness
    arc = self.fetchArc(selfobj) 
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 115, in fetchArc
    return fetchArc(lnkobj, sub)
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 56, in fetchArc
    linkedShape = obj.Shape
<class 'AttributeError'>: 'App.GeoFeature' object has no attribute 'Shape'
448.595 <App> Document.cpp(3715): Failed to recompute lattice_polar_array#PolarArray: 'App.GeoFeature' object has no attribute 'Shape'
Recompute failed! Please check report view.

If I am using Lattice2 wrong, I will be glad if you can teach me how to fix this.

Originally posted by @leoheck in #41 (comment)

Cannot find icon: :/icons/Lattice2_ScLERP.svg
Cannot find icon: :/icons/Part_Mirror.svg

OS: Manjaro Linux (XFCE/xfce)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.19955 (Git) AppImage
Build type: Release
Branch: master
Hash: fd907d6d9789f71007b8d0177d167f1de82629b8
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United States (en_US)

Running the latest Lattice2 HEAD 9a8fa96

I am working on an icon theme for Linkstage.
And it goes pretty good, but now there is a pattern Icon from Lattice2 on the part workbench. And since I like to have it complete I wanted to mod that one. But I couldn't.
It has a weird location link. I have no idea if it is an error in Linkstage or that it is the workbench. But maybe it rings you some bells if you see it. Normal icons don't have the :/icons/ in front of the location. And I guess the : breaks the iconset config file. I checked some other Workbenches like surface and path they all have normal resource paths.

If you have Linkstage installed and want to see it yourself you can do as followed:

new icon:

When you want to type Parameter Ref, it opens a popup you can populate with an expression. When you close it, the entered expression is not written in the python variable. If you type it directly, it works.

This is because the property is just a string which is supposed to hold expression-like content, and f(x) button sets an expression to compute that string, not the actual string.

I'm not sure what to do about it. There might be a legit use for that weird f(x) button, but mostly it just confuses everyone.

false_viewport should be True by default

Example:
make Cube
select it
Create custom placement. A dialog appears.
As you change values, both the cube and the placement move; but in the end, placement and cube are independent..

solutions:

1. deselect the object
2. or, maybe, treat this and create a copy of cube. Or linked placement.
3. Or option 2 deserves special command

It seems sometimes my PolarArray gets "stuck" -
varying parameters, etc. result in no change to Lattice objects or display...
The way to effect a change is to delete my Lattice and re-create.

How is this achievable, please?

Thanks for great WB

For PartDesign Next / Part-o-magic
The idea is to suck out Placements from other parts and bodies

populate tools hide the array under themselves. The purpose of the array is to be re-usable. So maybe it's best to not parent the array, to keep it on top of tree?

That also applies to input shapes for 'moved object' mode population. The original is most likely needed too, so it should remain.

• make polar array
• select a placement, apply "array filter selected items".
  -> the created placement is always 1mm in size.

https://github.com/DeepSOIC/Lattice2/blob/master/lattice2BaseFeature.py#L128

IMHO it should be "often" instead of "oftem"

Thank you for this extremely useful tool. I have a question.

I am working on making a 3D model for a relay.

1. Started in the Part Design workbench by creating a part.
2. Added two bodies, one for the main relay cube shape, and
3. one for modeling a single pin to be placement array'd.
4. I drew a chiral sketch mapped to the face on the underside of the relay.
5. I put a placement on the top face of the single pin, and
6. A placement on the first chiral shape I drew in the sketch for the relay cube.
7. I made an array of placements out of the chiral sketch, and then
8. used the Lattice Part Design pattern copy to attach the single pin to the array of placements.

That is what you see here:

I am trying to change the overall appearance of the relay to look like the example image shown here: https://www.digikey.com/products/en?keywords=EC2-3NU

But I cannot figure out how to change the appearance of the relay body and pins separately. Is there a way to do that?

https://forum.freecadweb.org/viewtopic.php?p=251960#p251960

https://github.com/DeepSOIC/Lattice2/blob/master/lattice2Common.py#L54

I don't know if FreeCAD 0.14 is supported or not.

Gives an error with FreeCAD 0.14:

Error: 'module' object has no attribute 'FreeCADError'

FreeCAD:

OS: Debian GNU/Linux 8.6 (jessie)
Word size: 64-bit
Version: 0.14.3702 (Git)
Branch: releases/FreeCAD-0-14
Hash: b3368125c63289ec8ce9faec2b2ae4c78d436406
Python version: 2.7.8
Qt version: 4.8.6
Coin version: 4.0.0a
SoQt version: 1.6.0a
OCC version: 6.7.0

FreeCAD v0.17
compressor nozzle v01.zip

Touching Sketch003 - nozzle breaks the sketch.
Probably caused by changes in PropertyLinkSubList Py API.

Hello,

When trying to use the Attached Placement function, this error happens, independently of what is selected, be it a vertex, a line, a surface or nothing:

Traceback (most recent call last): File "E:\Users\rstecman\AppData\Roaming\FreeCAD\Mod\lattice2\lattice2AttachablePlacement.py", line 207, in Activated CreateAttachablePlacement(name= "Placment") File "E:\Users\rstecman\AppData\Roaming\FreeCAD\Mod\lattice2\lattice2AttachablePlacement.py", line 173, in CreateAttachablePlacement FreeCADGui.doCommand("f = lattice2AttachablePlacement.makeAttachablePlacement(name='"+name+"')") File "<string>", line 1, in <module> File "E:\Users\rstecman\AppData\Roaming\FreeCAD\Mod\lattice2\lattice2AttachablePlacement.py", line 46, in makeAttachablePlacement obj = FreeCAD.ActiveDocument.addObject("Part::AttachableObjectPython",name) Base.FreeCADError: No document object found of type 'Part::AttachableObjectPython'
OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4 (GitTag)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 980bf9060e28555fecd9e3462f68ca74007b70f8
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Portuguese/Brazil (pt_BR)

I'm trying out 0.19 and got some errors loading Lattice2.

OS: Ubuntu 18.04.3 LTS (ubuntu:GNOME/ubuntu-wayland)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Python version: 3.6.8
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

Loading Part module... done
'PySide2.QtCore.qRegisterResourceData' called with wrong argument types:
PySide2.QtCore.qRegisterResourceData(int, str, str, str)
Supported signatures:
PySide2.QtCore.qRegisterResourceData(int, bytes, bytes, bytes)
Traceback (most recent call last):
File "", line 49, in Initialize
File "/home/mike/.FreeCAD/Mod/lattice2/Lattice2.py", line 28, in
import Lattice2CodeModules as Code
File "/home/mike/.FreeCAD/Mod/lattice2/Lattice2CodeModules.py", line 1, in
import lattice2Common as _common_code
File "/home/mike/.FreeCAD/Mod/lattice2/lattice2Common.py", line 88, in
import lattice2_rc
File "/home/mike/.FreeCAD/Mod/lattice2/lattice2_rc.py", line 21, in
qInitResources()
File "/home/mike/.FreeCAD/Mod/lattice2/lattice2_rc.py", line 16, in qInitResources
QtCore.qRegisterResourceData(0x01, qt_resource_struct, qt_resource_name, qt_resource_data)

Hi, I am experimenting with this lattice2 plugin. Thanks, by the way, it is awesome.

I am using the polar array, and in the Attachment panel I am seeing this Pad004 but I don't have any Pad004, this name is hidden from the user. What I have is wall_ribs instead. This is the name that the plugin should use. What happens it most of the time the user does not rename features so de label has the same name as the object.

Ah, and this should be used everywhere if you agree that this is an important change.

`Running the Python command 'Lattice2_ShapeString' failed:
Traceback (most recent call last):
File "/home/mac/.local/share/FreeCAD/Mod/lattice2/./lattice2ShapeString.py", line 285, in Activated
CreateLatticeShapeString(name = "Strings")
File "/home/mac/.local/share/FreeCAD/Mod/lattice2/./lattice2ShapeString.py", line 260, in CreateLatticeShapeString
FreeCADGui.doCommand("f = lattice2ShapeString.makeLatticeShapeString(name='"+name+"')")
File "", line 1, in
File "/home/mac/.local/share/FreeCAD/Mod/lattice2/./lattice2ShapeString.py", line 77, in makeLatticeShapeString
LatticeShapeString(obj)
File "/home/mac/.local/share/FreeCAD/Mod/lattice2/./lattice2ShapeString.py", line 105, in init
self.makeFoolObj(obj)
File "/home/mac/.local/share/FreeCAD/Mod/lattice2/./lattice2ShapeString.py", line 142, in makeFoolObj
self.draft_shape_string = _ShapeString(foolObj)
File "/home/mac/freecad-build/Mod/Draft/draftobjects/shapestring.py", line 59, in init
obj.addProperty("App::PropertyBool", "MakeFace", "Draft", _tip).MakeFace = True

'NoneType' object has no attribute 'MakeFace'`

[code]
OS: Debian GNU/Linux 11 (bullseye) (XFCE/lightdm-xsession)
Word size of FreeCAD: 64-bit
Version: 0.20.28431 (Git)
Build type: Unknown
Branch: master
Hash: 1d95f7b58da86406571377d4e0ce06190761d9b5
Python 3.9.2, Qt 5.15.2, Coin 4.0.0, OCC 7.5.1
Locale: C/Default (C)
Installed mods:

• kicadStepUpMod 10.11.6
• Manipulator 1.4.3
• DynamicData 2.45.0
• fasteners 0.3.38
• fcgear 1.0.0
• plugins
• Defeaturing
• Assembly4 0.11.10
• OpticsWorkbench 1.0.8
• workfeature-macro
• sheetmetal 0.2.49
• A2plus 0.4.55a
• CurvedShapes 1.0.1
• Curves 0.3.0
• lattice2 1.0.0
  [/code]

I'm trying to attach copies of the sketch Feature (the trapezium at the top) to some of the edges of another sketch (Path just below). I'm expecting to obtain the shape on the right (in my actual use case, I'd only select a subset of the edges). The Feature sketch has 4 degrees of freedom, which allow placing both its endpoints and it will stretch as needed. The use case is to add gluing tabs for a model made out of paper.

I tried to click TopoSeries after selecting the Feature and the Edges of Path (made with the Downgrade to Edges tool). I also tried to click TopoSeries after selecting the Feature and the Array from Edges of Path (made with Downgrade to Edges → Array from shape: internal placements with orient mode = child.Edge and Translate mode = child.Vertex)

In both cases, I get this message:

Error:
In supplied links, nothing to loop over compounds was found. Key-by-key errors follow:

How is the TopoSeries tool supposed to be used? I tried looking for documentation but couldn't find any example.

Here's the FreeCAD document in the screenshot: test_lattice2_toposeries.FCStd.zip

I just discoved Lattice2 and it seems very useful so far :)

As far as I can tell, there's no way to use Lattice2 to place Std Part instances.

If this is already possible, it would be great to have an example of some sort on the Wiki.

This is known to cause Part Revolve's 'make solid' feature not working.
The tricky part is backwards compatibility.

When recording a macro and using Lattice2 Explode Compound, the operation is not recorded. Is there any manual way to add this code to a macro? If so please send to me at oneilpatr at gmail dot com

Thanks

• start FreeCAD, make a new document, change to lattice2
• click on icon PolarArray --> a polar array is created
• double click on the obj in tree view
• click on ok
• error message ...

Traceback (most recent call last):
  File "/home/hugo/.FreeCAD/Mod/lattice2/lattice2AttachablePlacement.py", line 93, in unsetEdit
    if not (mode == EDIT_ATTACHMENT or (mode == 0 and always_edit_attachment)): raise NotImplementedError()
<class 'NameError'>: name 'always_edit_attachment' is not defined

reported by bernd:
https://forum.freecadweb.org/viewtopic.php?p=320316#p320316

Link to 1262

I'm in the process of studying your powerful workbench and have a suggestion. The shape of the paper plane is granted very nice. However, I think it would be probably more practical to have the back edges of the "wings" parallel to the Y-axis. I'm thinking that someone may want to visually align a placement perpendicular to something and these edges would facilitate that.

This is a detail but I guess that the change is minimal.