FreeCADView 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 |
| Reporter | myier | Assigned To | |||
| Priority | normal | Severity | tweak | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Product Version | 0.11 | ||||
| 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. | ||||
| FreeCAD Information | |||||
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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. |
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If arc's end-points lye on the rotation axis - it should be valid for revolve operation. Otherwise not. |
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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. |
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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 |
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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! |
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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... |
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git show bebd37a checks if a valid face from the sketch can be created. |
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Shouldn't this bug be closed then? |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 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 | |
| 2011-11-04 20:57 |
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Note Added: 0001240 | |
| 2011-11-04 20:57 |
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Status | new => acknowledged |
| 2011-11-04 20:57 |
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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 |
