Another approach to assembly solver (A2plus)

[kbwbe]

Edit: I have added a small PR

I merged it to master !

[roerich_64]

works great!

[easyw-fc]

Hi Guy's,
as "cylindersTangent" constraint is still on my todo list, this is some magic of @easyw-fc. I am curious how this was possible !

the result I got in the file is possible just because the cylinder is already in the right position (placement) for the tangent... the constraint is acting only on the seam edge coincidence ... if you rotate the cylinder manually, you will see that it can be freely rotated using its seam edge as axis of rotation. Unfortunately no tangent constraint is created.

[roerich_64]

works great!

But the transparency comes not through subassemblies...

[manuelkrause]

Edit: I have added a small PR

I merged it to master !

Mmmh, I don't understand... Somehow this doesn't work on here. Already a first imported file with set transparency doesn't apply it and refresh also doesn't bring it up.

(It's a Conda-like openSUSE Tumbleweed FC 0.18, and I applied the respective commit to the devel branch of A2plus and removed pycache before first use.)
Any idea what's going wrong? Or have I misunderstood the way it's supposed to work?

TIA and best regards

[easyw-fc]

Mmmh, I don't understand... Somehow this doesn't work on here. Already a first imported file with set transparency doesn't apply it and refresh also doesn't bring it up.

(It's a Conda-like openSUSE Tumbleweed FC 0.18, and I applied the respective commit to the devel branch of A2plus and removed pycache before first use.)
Any idea what's going wrong? Or have I misunderstood the way it's supposed to work?

TIA and best regards

Do you nave a small test file with sub file to upload that is Darling?

[easyw-fc]

I have added a small PR to A2p repo to better handle transparency...

For sub-assembly transparency I think we will have to be improve A2p using per face transparency as in this thread:
https://forum.freecadweb.org/viewtopic.php?t=16476

Here a sample with sub-assembly per face transparency:

mycube-transparency.FCStd

(11.71 KiB) Downloaded 43 times

assy-transparency1.FCStd

(11.86 KiB) Downloaded 41 times

[manuelkrause]

Mmmh, I don't understand... Somehow this doesn't work on here. Already a first imported file with set transparency doesn't apply it and refresh also doesn't bring it up.

(It's a Conda-like openSUSE Tumbleweed FC 0.18, and I applied the respective commit to the devel branch of A2plus and removed pycache before first use.)
Any idea what's going wrong? Or have I misunderstood the way it's supposed to work?

TIA and best regards

Do you nave a small test file with sub file to upload that is Darling?

Sorry, I have forgotten to add some files to my earlier post.
The assembly only consists of the one other file I'd also attach. Transparency in the latter set to 55 in Property editor and resaved. Untouched in the assembly.

[manuelkrause]

I have added a small PR to A2p repo to better handle transparency...

For sub-assembly transparency I think we will have to be improve A2p using per face transparency as in this thread:
https://forum.freecadweb.org/viewtopic.php?t=16476

Here a sample with sub-assembly per face transparency:
mycube-transparency.FCStd
assy-transparency1.FCStd

Please also note the files I've attached for you in my post above.
I've retested with these files and your PR link's commit applied. It doesn't change anything on here. Either in my FreeCAD the core .cpp transparency improvement commit hasn't landed as expected, it isn't sufficient or something else is going on.

Regarding your attached cube files... I attach two screenshots. First one is showing directly after opening the assy and second one is after refreshing imported files. Unfortunately both versions again show the annoying artefacts, coming along with unselectable faces (look at the cylinder's section and faces and try to select).
Are you able to reproduce what I describe?

BTW, the above linked forum thread was my inspiration to work on my improve-colors coding trials. But the unselectable faces issue made me take a break. In my humble understanding there is a collision of the presence of {DiffuseColor with/without included alpha value} and {ShapeColor with Transparency value property} and I haven't won any clear evidence about what gets precedence over the other or in which order. Maybe you're able to find out more.

BR, Manuel

after opening the assy

Screenshot_20190116_160721.png (22.37 KiB) Viewed 1372 times

after refreshing the assy

Screenshot_20190116_155954.png (17.95 KiB) Viewed 1372 times

[manuelkrause]

Here a small macro that could refresh Transparency if applied i.e. when refreshing the Assembly

Code: Select all

doc = FreeCAD.ActiveDocument

if doc is not None:
    for obj in doc.Objects:
        if hasattr (obj, 'ViewObject'):
            if hasattr (obj.ViewObject, 'Transparency'):
                if obj.ViewObject.Transparency < 100:
                    transparency = obj.ViewObject.Transparency
                    obj.ViewObject.Transparency = transparency + 1
                    obj.ViewObject.Transparency = transparency

Edit: I have added a small PR

In addition to my posts above... and referring to your most recent changes to this code:
I'm convinced that such trick needs to occur on every color operation within A2plus.

IIRC something like that was used in assembly2 and also is in current Arch WB, that needs somekind of this (windows are transparent).