chrisb wrote: ↑Sat Jul 07, 2018 8:51 am
otoien wrote: ↑Fri Jul 06, 2018 11:56 am
Interesting - so many possibilities.
The fact that you had used more constraints than I made me curious. I found that you have used tangency+coincidence, see the last image above. You should delete both of them, select the endpoints and apply tangency. That gives you the desired result in the intended way.
I only used coincidence on one of the arcs where I needed to place a reference point at the middle of the arc, so that I could set a 10mm distance constraint + some cases where it disconnected from the line (see below). However I believe those coincidence constraints are automatically deleted the the tangent is applied (according to the displayed message). I am not sure I understand, when I turn on visibility of all constraints they look identical to me (except that I unintentionally managed to place the construction lines at the bottom higher - should not matter as those lines were placed last and due to the vertical constraint of connecting lines).
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- Left Chris' version, right my version
- Clipboard07.jpg (214.79 KiB) Viewed 1536 times
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- Left Chris' version, right my version
- Clipboard09.jpg (105.98 KiB) Viewed 1536 times
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However you are right that the seam in the middle of the arc only displays on your version in 3D view when initially opened. However an error mark is displayed in Combo view (mouse hovering on the mark just displays "error" and nothing is displayed in report view). Turning on display of all constraints and saving under a new name makes the error to go away and so does the seam.
Your version before and after re-saving:
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- Error and seam goes away after resaving.
- Clipboard08.jpg (151.02 KiB) Viewed 1536 times
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I made a test, trying to mark both both endpoints of an arc attached to two lines and apply tangency, but got rather unexpected result (arc became circle) or if lines had vertical constraints I got a plethora of duplicate constraint message. During my edit I applied tangent to each end of arc by marking arc and one connecting line and then applied tangent, repeat for the other end.
When doing the edits sometimes line endpoints get disconnected from each other and it is necessary to connect again by applying a coincident constraint (perhaps that is where you point out that tangency can be applied directly?).
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When I select with a rectangle selection I don't get all constraints. In the attached image I have made a rectangle selection and none of the tangents was selected.
The rectangle selection does not seem to select any constraints to me, only Elements.
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I updated to the latest development version early today, so I am posting version info again.
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.14014 (Git)
Build type: Release
Branch: master
Hash: f0252c80c2f6408e9c64120c24b9de6091ec57fb
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/UnitedStates (en_US)