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by wsteffe
Wed May 06, 2020 1:31 pm
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

An assembly document should not necessarily import its various components, just temporarily render them on the display at the desired 3D position I think this is the way done by both A3 and A4 trough the link functionality developed by Realthunder. A2+ does not offer the required accuracy That is d...
by wsteffe
Wed May 06, 2020 1:25 pm
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

An assembly document should not necessarily import its various components, just temporarily render them on the display at the desired 3D position I think this is the way done by both A3 and A4 trough the link functionality developed by Realthunder. A2+ does not offer the required accuracy That is d...
by wsteffe
Wed May 06, 2020 9:23 am
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

you start with nbParts * 6 DoFs I think you have misunderstood. This is not about a different way to define the assembly, but just a more efficient way to solve the system of equation associated with the constraints. You would be free to define the assembly according to your designer intent, your p...
by wsteffe
Wed May 06, 2020 8:10 am
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

I would argue in reverse: in most real-world assemblies, most parts are fully constrained I am also assuming that most real-world assemblies are fully constrained. But this "fully constrained" status may be enforced by a large system of (possibly non linear) equations. My previous post aimed at the...
by wsteffe
Wed May 06, 2020 7:21 am
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

and what does it do in this preprocessing ?
Is it able to identify the rigid subclusters ?
by wsteffe
Wed May 06, 2020 6:41 am
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

rewriting the solver in C++ This would surely be beneficial but I.M.O, the solver times could also be improved with an intelligent pre-processing applied in advance of the brute force solver. This suggestion is based on the following consideration: Most mechanical assemblies are built by imposing c...
by wsteffe
Tue May 05, 2020 11:24 am
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

It is understandable that A4 works well considering that its constraints are based on exact formulas instead of an approximate numerical solver. I will give it a try in the future. I am still planning to switch from commercial CAD to FC but I am waiting to see a few more improvements. One of them be...
by wsteffe
Mon May 04, 2020 7:00 pm
Forum: Assembly
Topic: Embedding assembly in FreeCAD's various uses
Replies: 21
Views: 1167

Re: Embedding assembly in FreeCAD's various uses

I needed to connect and fuse a number of bodies that together form a merged body I have a very similar requirement in a design flow which involves EmCAD (an electromagnetic modeler I am developing). Acutally in my case the adjacent bodies are not fused but are imprinted to assure that a common face...
by wsteffe
Wed Aug 28, 2019 11:05 am
Forum: Assembly
Topic: Assembly 4 workbench
Replies: 646
Views: 79587

Re: Assembly 4 workbench

the first step is to come to an agreement about what information a constraint should include at minimum, and this in a forward-compatible way, such that several solvers can be implemented in the future. I agree. It would be very nice to have an agreement on the assembly data structure, which (in my...
by wsteffe
Fri Mar 29, 2019 9:25 am
Forum: Developers corner
Topic: FreeCAD OCAF and reinventing the wheel
Replies: 34
Views: 3693

Re: FreeCAD OCAF and reinventing the wheel

In my last post jast after the line: myContext = new AIS_InteractiveContext( myViewer ); I have mistakenly inserted also: TopoDS_Shape S= shapeTool->GetShape(label); Handle(XCAFDoc _ShapeTool) shapeTool; ... is a higher level tool that may be used when dealing with a XDE document. In my application ...

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