View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000459||FreeCAD||Feature||public||2011-10-29 22:29||2016-08-14 19:47|
|Fixed in Version||0.14|
|Summary||0000459: Revolving a single line sketch fails|
|Description||A sketch containing a line fails to be revolved, with error: "Creating a face from sketch failed".|
A sketch containing an arc can be revolved, a sketch containing two lines can be revolved if they are not collinear.
|Tags||No tags attached.|
||In Part design all operations must return a single solid object. So, it's correct to not revolve single lines. The actual bug is to allow to rotate an arc.|
If arc's end-points lye on the rotation axis - it should be valid for revolve operation. Otherwise not.
||If I understand correctly, the sketcher should not be used to create objects like a pipe or a toroid with a sketched cross-section? What to use then, constraints are useful for all kinds of objects, not only objects that have a link with their rotation axis.|
I afraid you got it wrong. You can create pipe or thoroid shape IF the profile is closed. For a revolve operation the profile can remain open only IF the axis of rotation is co-linear with the line(s), needed to close it.
Example: if you revolve an arc that of 180 degrees a full turn about the line connecting its end-points, you get a sphere. That's a valid solid.
A pipe can be done in two ways:
In a single step by creating a sketch consisting of two concentric circles and extruding/rotating it or
In two steps by first extruding/revolving a single circle and then extracting/revolving a pocket from it.
I any case the walls of your shape must have a thickness>0 when you work in 'part design'. You can not create 3D surface there. Hopefully in another workbench some day.
Hope it helps
||Alright tilas, I understand now. Thank you. I didn't get the thickness issue, now that's clear. I was in fact creating plain objects, when I thought I just had the outer faces and I thought I had display problems due to transparency. The sketcher is even greater than I thought!|
Auto close a open profile is a non trivial operation. So at the moment the save bet is to allow only profiles with defined closed wires.
But I leave it as a a feature...
||git show bebd37a checks if a valid face from the sketch can be created.|
||Shouldn't this bug be closed then?|
|2011-10-29 22:29||myier||New Issue|
|2011-10-31 09:24||wmayer||Note Added: 0001199|
|2011-11-01 11:37||tilas||Note Added: 0001204|
|2011-11-01 11:38||tilas||Note Edited: 0001204|
|2011-11-02 09:55||myier||Note Added: 0001214|
|2011-11-02 17:47||tilas||Note Added: 0001216|
|2011-11-02 18:11||myier||Note Added: 0001217|
||Note Added: 0001240|
||Status||new => acknowledged|
||Category||Bug => Feature|
|2013-07-10 11:27||wmayer||Note Added: 0003373|
|2016-08-07 16:55||normandc||Note Added: 0007255|
|2016-08-14 19:47||wmayer||Status||acknowledged => closed|
|2016-08-14 19:47||wmayer||Resolution||open => fixed|
|2016-08-14 19:47||wmayer||Fixed in Version||=> 0.14|