abdullah wrote:If you created the file, you are the copyright owner of it, so you should put your name in it as well as the license. I would copy one header from another file and put your name in it, along with the correct year of creation.
OK, thank you! git commit c442ce6721cdf2fbcb76dd925b92ce5d95c32483
TADA! Tangency lockdown is done. git commit ef77191f3c5638a34bdd6e6a6c7a97e17ad2ea37
Here's how to observe it.
1. create new sketch, draw a horizontal slot, close it, pad it.
2. map a new sketch to the top face
3. draw a circle. Make it tangent to an endpoint of an arc of the face (use link to external geometry). Lock circle's radius.
4. close the sketch and open the first sketch. Shrink or expand the slot trying to leave the circle in air or bring it back onto the face. In old FreeCAD, you will succeed. In this version, the circle will remain where it was (on the face).
EDIT: Oh, by the way! If you try it in the attached file, it will still flip regardless of FreeCAD version, because I have created it in the older FreeCAD. Oops
. EDIT2: it is enough to recreate the tangent constraint. Tangency type is locked down at creation of the constraint.