Nabble - LibreCAD 3 Development discussion

Re: Mechanism that moves

2026-01-24T14:40:33Z

Currently, a possible way is to do it through our plugin interface.

Of course, to support simulation well, a constraint system is problem needed. At the engine level, LibreCAD currently has a linear algebra sytem, a quadratic system, and a projective geometry system. Need to study for a proper design of a constraint solver based on our own existing solvers.

ginghis wrote

If I draw a mechanism in librecad is there a facility to show this mechanism moving? If so, librecad could enable simulations of mechanisms. That would be unique.

Mechanism that moves

2026-01-23T14:21:11Z

If I draw a mechanism in librecad is there a facility to show this mechanism moving? If so, librecad could enable simulations of mechanisms. That would be unique.

Re: Layer Tree y Lista de Capas

2025-11-10T09:37:48Z

OK
Gracias

Re: Layer Tree y Lista de Capas

2025-11-10T07:18:46Z

well, Layer List is rather historical one as is present for compatibility reasons so far. Indeed, Layers List may be disabled and only the Layer Tree (either with hierarchy tree or as last list) may be used.

Layer Tree y Lista de Capas

2025-11-09T14:03:46Z

Estoy utilizando la version 2.2.1.2 de Librecad, y en esta version conviven los dos Widgets , Layer Tree y Lista de Capas, ¿ hay alguna razon para ello ? , creo que con Layer Tree seria suficiente

Re: Finding center of gravity

2025-07-11T07:30:15Z

In LibreCAD v3, 2d integrals are estimated to find the area

In LibreCAD v2, the area is found by contour integrals.

While it's straightforward to consider a local weight function to get various physical functions, it's not really what we are focusing on. Any help is welcome though

ginghis wrote

In the case of 2D it would be second moment of area instead of center of gravity. Multiplying by thickness and density gives weight which is centered at the center of second moment of the area.

Re: Finding center of gravity

2025-06-09T06:54:25Z

In the case of 2D it would be second moment of area instead of center of gravity. Multiplying by thickness and density gives weight which is centered at the center of second moment of the area.

Re: Finding center of gravity

2025-06-09T05:54:10Z

Since LibreCAD focuses on 2d, a reasonable cog is also limited to 2d.

ginghis wrote

Is there a way for libreCAD to find the center of gravity of a part if it knows all the dimensions?
Is this a viable route of development?

Finding center of gravity

2025-06-07T16:22:16Z

Is there a way for libreCAD to find the center of gravity of a part if it knows all the dimensions?
Is this a viable route of development?

Re: Read AutoCAD's DWG file format

2025-04-21T06:38:49Z

If libredwg would be used as external library that is linked against, adding a linking exception for libredwg to the librecad copyright license terms should resolve that GPv2/GPLv3 issue https://www.gnu.org/licenses/gpl-faq.html#GPLIncompatibleLibs. There should already be such an exception there for Qt, since it is dual licensed under QT commercial license and GPLv3+ afaik, neither of which are compatible with GPLv2

Re: I propose...

2025-04-20T14:11:01Z

It's a good project, but probably too large for our small developer group.

It's more like a 3D CAD to me than a pseudo-3D.

Turriano wrote

I propose to the developers of Libre Cad, the improvement of this (at least) pseudo 3D, using mathematics
https://tips.clip-studio.com/es-es/articles/1458

I propose...

2025-02-18T09:32:08Z

I propose to the developers of Libre Cad, the improvement of this (at least) pseudo 3D, using mathematics
https://tips.clip-studio.com/es-es/articles/1458

Re: Bemassung

2025-02-08T02:22:40Z

Nein Anzeige der Länge meinte ich nicht.
Ich meinte wenn man die Linie anklickt die Bemassung aufziehen kann. So das man nicht die Endpunkte anklicken muss
M.F.G.J.Fey

Re: Bemassung

2025-02-08T00:46:20Z

The length of selected entities will be displayed in the footer.

Bemassung

2025-02-07T23:14:19Z

Hallo Gibt es eine Funktion um eine Linie zu Bemassen in dem man diese anklickt oder ist so eine Funktion vorgesehen
M.F.G.J.Fey

Re: Model/paper space

2025-01-04T10:00:05Z

V3 is ambitious, so I would expect the need of a few full time developers to reach and surpass features available in v2.

Ideally, we should implement in v3 key new features (at geometric level, say, parabola, Hyperbola, hatching, and projective geometry (like dual curves)), before backporting to v2.

Limited development time is the issue. Otherwise, we can directly get views at v3, and port back to v2 by taking the Qt variant.

aman wrote

Hello and welcome!

LibreCAD is an open source project, that means most if not all develepors do it in their spare time.

That leads to an other problem, most open source projects are in constant need of more developers.

Re: Model/paper space

2025-01-04T05:07:15Z

Hello and welcome!

LibreCAD is an open source project, that means most if not all develepors do it in their spare time.

That leads to an other problem, most open source projects are in constant need of more developers.

Model/paper space

2025-01-04T04:40:29Z

I like to draw actual size because of CNC reasons so a paper space would help when I design big items

Re: Block synchronization in block navigator

2024-10-09T08:03:50Z

I would like to get snap support for v2 before the 2.2.1 release.

My current development hours are rather limited. I guess it would be long for me to fix the v3 building actions.

In addition, I feel we should enable and add unit tests by GitHub actions.

flywire wrote

dxli wrote

we have automatic building for v2

...based on the automatic build developed for V3 which needs maintenance.

Re: Block synchronization in block navigator

2024-10-08T10:17:23Z

dxli wrote

we have automatic building for v2

...based on the automatic build developed for V3 which needs maintenance.

Re: Block synchronization in block navigator

2024-10-08T04:38:56Z

I mean to provide builds for end users by GitHub actions. For example, we have automatic building for v2:

https://github.com/LibreCAD/LibreCAD/actions

And the builds can be downloaded at

https://github.com/LibreCAD/LibreCAD/releases

DG wrote

It is unfortunate, hopefully there will be more interest in the future. Anyway respect for Librecad community. Some amazing work done. I am not sure what you mean of automatic building of v3 on GitHub. I am no coder, but maybe I could try to help.

dxli wrote

Hi DG,

Unfortunately, I am not aware of.

If you are interested, can we do one basic at least: to get automatic building of v3 on GitHub(for windows, Linux, Mac)?

I tried a little bit, but looks like I will need some help.

DG wrote

Is there still anyone working on V3?

Re: Block synchronization in block navigator

2024-10-07T09:47:25Z

It is unfortunate, hopefully there will be more interest in the future. Anyway respect for Librecad community. Some amazing work done. I am not sure what you mean of automatic building of v3 on GitHub. I am no coder, but maybe I could try to help.

dxli wrote

Hi DG,

Unfortunately, I am not aware of.

If you are interested, can we do one basic at least: to get automatic building of v3 on GitHub(for windows, Linux, Mac)?

I tried a little bit, but looks like I will need some help.

DG wrote

Is there still anyone working on V3?

Electrical engineering and automation

Re: Block synchronization in block navigator

2024-10-03T06:53:33Z

Hi DG,

Unfortunately, I am not aware of.

If you are interested, can we do one basic at least: to get automatic building of v3 on GitHub(for windows, Linux, Mac)?

I tried a little bit, but looks like I will need some help.

DG wrote

Is there still anyone working on V3?

Re: Block synchronization in block navigator

2024-10-02T10:55:00Z

Is there still anyone working on V3?

Electrical engineering and automation

Block synchronization in block navigator

2024-09-24T11:18:17Z

Hi everyone,

Not sure if I am writing in the correct place or if I can ask for features for V3, but I realised that sync for blocks in navigator would be very helpful. Because when you have a lot of blocks and don't want to explode it, but want to edit text for example you need to search for it in the navigator. While it could be easier if you select the block, press shortcut or button and then its selected in navigator. Then you can easily edit the block in other window. If this feature is already available please let me know, maybe I just lack knowledge.

Electrical engineering and automation

Re: .dwg file read by LibreCad when?

2024-08-24T12:33:49Z

Dwg support is limited. Currently, no developer is working on it from librecad side.

PaulfromPoland wrote

Hello

When will I have the possibility of opening .dwg file on LibreCad. Is any team working on this?
Best regards
Pawel

Or any hint how can I open .dwg file directly, not after the previous change to .dxf

.dwg file read by LibreCad when?

2024-08-22T10:26:56Z

Hello

When will I have the possibility of opening .dwg file on LibreCad. Is any team working on this?
Best regards
Pawel

Or any hint how can I open .dwg file directly, not after the previous change to .dxf

Re: Read AutoCAD's DWG file format

2024-01-15T07:31:43Z

Sadly it is still not possible for LibreCAD 2.*!
It was extensively discussed back in 2012 iirc that the LibreDWG license is not compatible with GPLv2, to which LibreCAD is still bound because of its QCAD roots.

^{investing less than half an hour into Search function can save hours or days of waiting for a solution}

Re: Read AutoCAD's DWG file format

2024-01-14T22:52:01Z

I think it's possible, if you want join the development.

桃花潭水 wrote

Can I use LibreDWG, the open source DWG file library, to complete LibreCAD's DWG format

Re: Read AutoCAD's DWG file format

2024-01-04T19:37:41Z

Can I use LibreDWG, the open source DWG file library, to complete LibreCAD's DWG format

Re: Read AutoCAD's DWG file format

2024-01-04T13:36:02Z

Dwg support is minimum. Dxf support is only up to dxf 2007.

桃花潭水 wrote

Hello LibreCAD developers：
I compiled LibreCAD according to the official documentation and can build it with QT, but I found that it seems to be not so friendly to AutoCAD DWG files. Even DXF files drawn in AutoCAD, I opened them with LibreCAD, and the text in the files was gone. What plugins can I use to improve these features?
——Xiao Ke

Read AutoCAD's DWG file format

2024-01-04T01:05:38Z

Hello LibreCAD developers：
I compiled LibreCAD according to the official documentation and can build it with QT, but I found that it seems to be not so friendly to AutoCAD DWG files. Even DXF files drawn in AutoCAD, I opened them with LibreCAD, and the text in the files was gone. What plugins can I use to improve these features?
——Xiao Ke

Re: Appimage for librecad 3

2023-08-23T00:05:07Z

There was an error in my pseudo code. Trying again:

line = lineBuilder(start=(0,0),end=(10,100),layer=0).insert()
for j in range(7):
line.rotate(angle=45*(j+1),about=(0,0)).insert()

Re: Appimage for librecad 3

2023-08-23T00:02:43Z

In terms of how it's going, well it's functional aside from known bugs that I've read about (green screen on startup, etc) but I think I'll keep using v2.x.x for my main work for now. I have many suggestions or feature requests but I'm afraid of offering too many too early. In other words I recognize this is super fresh and young, and I'm blessed to be able to have it for free.. so suggesting large features is a little like looking a gift horse in the mouth. With that said, if the following is helpful then here are two high level comments:

. GUI. The buttons are huge and.the gaps between panels are huge and the space around the properties table is huge and everything is huge. So even with my best efforts to move things around and make it all as compact and out of the way as possible, and even stacking panels on top of other panels by dragging them on top of each other to create tabs, I still have a very very small space to actually draw in. It's frustrating to have only 1/2 to 2/3 of the screen area as the drawing area. Basically everything in the GUI needs to be way smaller, tighter, and more space-efficient so the drawing area can be huge instead.

. The new scripting functionality is awesome and it's what I came for but (a) I know others have suggested python, but it really would make it more appealing to more people I think. Still, if I've gotta learn lua I'll learn lua. I'll just grumble as I do it. (b) I see the way it operates is basically to give a list of operations that sort of stack on top of each other. Using appendEntity and appendOperation. Maybe I'm missing something but it feels so awkward and super clunky to do it that way. Take the first example here: https://wiki.librecad.org/index.php/LibreCAD_3_-_Lua_Scripting
In that example "This create 128 entities, because the Copy operation copy all the lines on each loop." Wow. I could imagine how to write it to NOT copy all the lines on each loop but it'd be much longer and quite repetitive. Why is it being done this way with all the operations appended on previous operations? Could it not be more like the following pseudo code? This is more what I was expecting.

line = lineBuilder(start=(0,0),end=(10,100),layer=0).insert()
for j in range(7):
line.rotate(angle=45,about=(0,0)).insert()

That paradigm for coding is super short and understandable to the reader. No need to stack operations. Though I understand maybe under the hood that is what is happening...

Re: Appimage for librecad 3

2023-08-22T23:33:08Z

dnh234589 wrote

I'm interested in trying Librecad 3... I'm attracted to the scripting capability.

It would be nice if you could keep the community updated on how it is going.