Have an Openscad to Freecad conundrum to solve [solved]

[Yuri]

Thank you.
If the drag and drop from my files explorer doesn't do that how do I do it?

[chennes]

Below the post composing region, there is a set of tabs : "Options" and "Attachments". Choose "Attachments", then click Add files.

[Yuri]

I had to divide this post in 2 because I'm stupid. When I reach 5 image files, it won't accept any more.

Have you seen the stamina of wolves when they are on the hunt? This post is important to me.  My hunger got me out in another outing and brought another bone for you all to chew on. I managed to process 3 important files. They look pretty,  below. These are just portions.

BearPartialFCImage.JPG (32.73 KiB) Viewed 1162 times

which is produced by https://drive.google.com/file/d/1X4Ts_X ... sp=sharing and https://drive.google.com/file/d/1E27JiW ... sp=sharing

InsCradleFCImage.JPG (31.29 KiB) Viewed 1162 times

which is produced by https://drive.google.com/file/d/1QixH6z ... sp=sharing and https://drive.google.com/file/d/19V_mur ... sp=sharing

BasePartialFC.JPG (19.02 KiB) Viewed 1162 times

which is produced by https://drive.google.com/file/d/1mP71UB ... sp=sharing and https://drive.google.com/file/d/1ldTUv7 ... sp=sharing

I kept all the layers red by the scad file so that you can see that more complicated parts are still working in FC with numerous layers and a lot of intersecting geometry.

The scad files will be fetched by FC0.192, however, I do not know if the rotate extrude will work correctly, if not, you'll have to install the newer importCSG.py and the other one.


however, this advance just dragged me into another pit.  Assume that I want them to be exactly that, that you see. Easy,  just make a solid, select it, click export step ... bingo!! Right?  Well, the step export of the first file when brought back to FC looks just as it is seen in the screen shots below.  I went out to hunt again but just managed to find carrion and hard bones.  This one won't yield. 

BearPartialStep1.JPG (35.74 KiB) Viewed 1162 times

BearPartialStep2.JPG (33.25 KiB) Viewed 1162 times

[Yuri]

BearPartialStep3.JPG (32.24 KiB) Viewed 1154 times

The step exports appear to have "bled" geometry inward as seen in the image on the top of the second set. Note the gap in between and the "bled" geometry. Note also in the second image, geometry that shouldn't be there in the first place intersecting awkwardly with actual desired geometry. The FC looks perfect and there is no logical reason for the hidden geometry of the FC file to intersect the seen geometry in its awkward embodiment.

The second file, (InsertCradle) is part of another structure. When I attempt a fetch of the exported step file back into FC, FC dies.  Resuscitation is required. 

The portion you see in the second image from the top down is fetched correctly by FC as seen in the image. The step files when imported back into freecad look as shown below:

InsCradleStepImage.JPG (37.39 KiB) Viewed 1154 times

Note the partial rotate extrude being ignored in the generated step file.
Out of speculation  i suspect that this may be an outgrow of the issue with the parsed rotate extrude. The parts that I see in the fetched Step file show 360 degrees circular  geometry where it is only say, 100.  I would have not expected that the algorithm that makes the conversion between FC and Step would require proper parsing of that  but maybe,  it does. 

The third file, (base) which is also just a portion of the original file has thrown me back into issues I thought I had overcome. 
One good thing is that I can render a single piece of geometry in openscad and pass that single piece to FC so that I can work my way up to try to figure the identify of the bug. This one could amount to a prehistoric dragon fly the size of an eagle.   I need an entomologist.
 The third image from the top down shows both, the original two 2D images and the resulting union of extrusions of each. This one was working at a time but it got possessed. If in the boolean union I put the rectangle first, I obtain the rectangle. I chewed on this one like a dog after a hunger strike.

The bone is there for you to chew on. 

[chennes]

What version of OCCT are you on? I think there is a step export bug in 7.5.1, I wonder if this is hitting that.

[Yuri]

Hi.
Miniconda navigator says that the version is 7.4.0

I can see updates to 7.5.0; 7.5.1 or 7.5.2.

I don't understand well how anaconda manages the applications on my computer. Blindly I could hit on an update, let it do its thing and assume that at the end I may have the updated version available for FC. I just cross my fingers because I don't understand the innerworkings of anaconda and many other things in computers.

With regards to my post, I wish to say that the simpler prizm, If I make it intersection in openscad instead of union, the intersection will be done correctly in FC.

[chennes]

What version of OCCT does About FreeCAD report?

[Yuri]

Open CASCADE Technology 7.5.0
http://www.opencascade.com

I suppose I should be getting the update that you will suggest.

How do either do that directly from FC or otherwise how do I tell anaconda to update and mak it available to FC?

Note that it is the 7.5.0 and not the 7.5.1.

[jmaustpc]

Open CASCADE Technology 7.5.0
http://www.opencascade.com

I suppose I should be getting the update that you will suggest.

How do either do that directly from FC or otherwise how do I tell anaconda to update and mak it available to FC?

Note that it is the 7.5.0 and not the 7.5.1.

It helps if you post your "help ...about FreeCAD...copy to clipboard" data from the Help menu within FreeCAD. If you don't understand what we are talking about, see the instructions in the Forum Rules link above this help forum where it is explained in detail.

I don't know anything about anaconda specifically but generally speaking FreeCAD has to be compiled with a specific version of OCC, so you generally can not just upgrade OCC, unless you recompile FreeCAD or find a FreeCAD version for download that has been compiled with that different version of OCC.


Jim

[keithsloan52]

Open CASCADE Technology 7.5.0
http://www.opencascade.com

I suppose I should be getting the update that you will suggest.

How do either do that directly from FC or otherwise how do I tell anaconda to update and mak it available to FC?

Note that it is the 7.5.0 and not the 7.5.1.

NO !!!!

What you have installed and what FreeCAD is built with are not necesaarily the same. If you are using FreeCAD 0.19.2 it will be using a version of OCCT with the bug(regression).

As others have said you need to post your FreeCAD versions, details are highlighted in the forum, but I wlll attempt to repeat them here.

On the icon bar you will have something like

496B56F4-43AE-450F-A517-42B5B299DF31_4_5005_c.jpeg (11.05 KiB) Viewed 1040 times

You click on the FreeCAD bit and the first menu item is about FreeCAD, if you click on it you should get something like

529A7CAE-4900-4320-8C22-1AFD9A12377F.jpeg (90.3 KiB) Viewed 1040 times

If you then click on 'Copy to clipboard'

Then past the clipboard to the forum you should get something like

Code: Select all

OS: macOS 10.15
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24276 (Git)
Build type: Release
Branch: (HEAD detached at 0.19.1)
Hash: a88db11e0a908f6e38f92bfc5187b13ebe470438
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: C/Default (C)

You could have saved yourself a lot of trouble and heart ache if you had followed the forum instructions for this in first place, way back.