datum plane creation is unintuitive

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uwestoehr
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Re: datum plane creation is unintuitive

Postby uwestoehr » Wed Feb 13, 2019 11:55 pm

wmayer wrote:
Wed Feb 13, 2019 6:32 pm
When you create a datum plane then you must already have created a body beforehand...
Many thanks! This make it much more clear. Since I have now Wiki access to write the a2plus documentation, am I also allowed to transfer things I learned here directly to the corresponding Wiki page?:
https://www.freecadweb.org/wiki/PartDesign_Plane
bejant wrote:
Wed Feb 13, 2019 8:14 pm
I wonder if, to avoid confusion, when the user selects an object having a local coordinate system that is different than the world coordinate system, a secondary X,Y,Z axis indicator should also appear in the lower right corner (next to the existing world X,Y,Z indicator) that shows the local X,Y,Z axes of the selected item? When the object is de-selected this secondary indicator disappears.
That would be very helpful.
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bejant
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Re: datum plane creation is unintuitive

Postby bejant » Wed Feb 13, 2019 11:58 pm

uwestoehr wrote:
Wed Feb 13, 2019 11:55 pm
Since I have now Wiki access to write the a2plus documentation, am I also allowed to transfer things I learned here directly to the corresponding Wiki page?:
https://www.freecadweb.org/wiki/PartDesign_Plane
Sure!
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uwestoehr
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Re: datum plane creation is unintuitive

Postby uwestoehr » Thu Feb 14, 2019 12:28 am

bejant wrote:
Wed Feb 13, 2019 11:58 pm
uwestoehr wrote:
Wed Feb 13, 2019 11:55 pm
am I also allowed to transfer things I learned here directly to the corresponding Wiki page?:
https://www.freecadweb.org/wiki/PartDesign_Plane
Sure!
Done.
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Pauvres_honteux
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Re: datum plane creation is unintuitive

Postby Pauvres_honteux » Thu Feb 14, 2019 1:58 am

uwestoehr wrote:
Wed Feb 13, 2019 11:55 pm
... transfer things I learned here directly to the corresponding Wiki page:
https://www.freecadweb.org/wiki/PartDesign_Plane
Reading that page gave me hickup on this sentence "A datum plane is only sensible when there is at least a body."

Shouldn't it read: "As of now [todays date] sadly enough, datum planes can only be created inside a body."?
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Pauvres_honteux
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Re: datum plane creation is unintuitive

Postby Pauvres_honteux » Thu Feb 14, 2019 2:21 am

Other than that I totally agree with you about the wording used in everything involving placement and especially this "Z-axis is always in the direction of movement".

I would suggest the following:
For offsets there are ONLY two direction, one way or the opposite way, with respect to its origin.
This is how we humans think of an offset in general, i.e. it shall be reflected accordingly in the UI.
Further, we (the users) would, eagerly, like to se this visually in real time in the 3D view port.

Even further, I'd like to ask the coders if it would be possible to create a general, realtime, preview "thingie" easy to use for all programmers anywhere in the code?
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HarryGeier
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Re: datum plane creation is unintuitive

Postby HarryGeier » Thu Feb 14, 2019 10:30 am

It´s very easy :


phpBB [video]


harry
Kaum macht man´s richtig , gehts´s
My Video Tutorials on Youtube: https://www.youtube.com/channel/UCoe3B ... p8Q/videos
My FreeCAD Stuff on Hidrive: https://my.hidrive.com/share/qr3l1yddy6#$/
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uwestoehr
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Re: datum plane creation is unintuitive

Postby uwestoehr » Thu Feb 14, 2019 2:05 pm

Many thanks for your help and the fruitful discussion. As result the Wiki page was improved and for the remaining proposal I created issue #3836.
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bejant
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Re: datum plane creation is unintuitive

Postby bejant » Thu Feb 14, 2019 5:14 pm

To view any local coordinate axis in Part Design, select a Plane or a planar Face and click this icon (in the Part Design Helper toolbar, next to the Create Datum Plane icon):
Image

https://www.freecadweb.org/wiki/PartDes ... nateSystem

It's in my 0.18 version of FreeCAD but not in 0.17.


OS: Ubuntu 18.04.1 LTS
Word size of OS: 32-bit
Word size of FreeCAD: 32-bit
Version: 0.18.15780 (Git)
Build type: Release
Branch: master
Hash: f94e76c1116ec3b818961ff65131b3d86fa5b95e
Python version: 2.7.15rc1
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)