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Shell (sweep)
About Truespace Archives
These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Shell (sweep) // Tech Forum
Post by Stem // Aug 3, 2008, 5:46pm
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Stem
Total Posts: 199
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Hi all,
I was looking at the sweep~ shell. It sounds pretty straight forward in the manual but I dont see it working correctly.
As example, I placed a cube in Workspace, selected all faces then Dynamic sweep~ shell. All that happened was the cube became hollow, there was no thickness to the walls.
Is it me? am I missing something?
- Stem |
Post by Jack Edwards // Aug 3, 2008, 5:54pm
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Jack Edwards
Total Posts: 4062
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Just tested and it worked fine for me. Did you click drag to define the interior cube size? |
Post by Stem // Aug 3, 2008, 6:04pm
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Stem
Total Posts: 199
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Hi Jack,
Yes, I have tried dragging inwards, and outwards, I just get left with 6 faces (no wall thickness)
I tried again, then boolean out the middle of the cube, pic of the result attached
- Stem |
Post by Stem // Aug 3, 2008, 6:32pm
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Stem
Total Posts: 199
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Hi Jack,
As you where reporting no problem, I have re-installed TS/V-ray and is now OK.
Thanks for your time.
- Stem |
Post by Jack Edwards // Aug 3, 2008, 8:53pm
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Jack Edwards
Total Posts: 4062
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You shouldn't have to re-install to solve the problem though. :( If it happens again, definitely post so we can nail down if something is getting corrupted or if it's just a settings issue. |
Post by kena // Aug 4, 2008, 5:33am
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kena
Total Posts: 2321
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did you just click, or <ctl><click>? I've never used the shell before, but I just tried it and when I did a normal click, I only got one face, but then I undid that and did a ctl-click
13827 |
Post by TomG // Aug 4, 2008, 5:51am
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TomG
Total Posts: 3397
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Holding ctrl isn't necessary - note that it is if you are adding faces to the selection (I prefer to select using the rectangle tool say, then activate sweep, rather than use the sweep to make a selection).
Note that partial selections may be problematic, results may not be as expected. Shell works best with all faces selected, eg rectangle tool (ensure select back faces is enabled rather than just select visible).
HTH!
Tom |
Post by Stem // Aug 4, 2008, 7:22am
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Stem
Total Posts: 199
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Hi Jack,
You shouldn't have to re-install to solve the problem though.As it only takes a few minutes, I thought to do that to ensure correct installation. I did first try a startup reset of TS and removing the default.ctx file etc
If it happens again, I will let you know.
- Stem |
Post by Stem // Aug 4, 2008, 7:32am
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Stem
Total Posts: 199
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Hi Kena,
did you just click, or <ctl><click>? I followed the instructions from the user manual, which is basically what Tom has posted above.
I did after it failed try various combinations, but nothing came out giving a wall thickness, even an unexpected result would of been a result, but I just got a hollow with no wall thickness, as with the example pic I posted.
If I have not selected all faces, then there would of been faces (that where selected) with wall thickness, but there where none.
Anyway, it is now fixed.
- Stem |
Post by Stem // Aug 4, 2008, 10:44am
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Stem
Total Posts: 199
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Hi Again,
Just a note, really to TomG,
My post Here (http://forums1.caligari.com/truespace/showthread.php?t=4841),... that problem is now resolved (thanks) and opens up quite a lot of possibilities for me in the workspace.
To all:
A problem from the shell to mention, is if it is used when sweeping, and the intention is to perform SDS later, the sweep~shell does produce faces in between the sweeps and causing bad geometry on the SDS
Regards,
- Steve |
Post by Jack Edwards // Aug 4, 2008, 7:40pm
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Jack Edwards
Total Posts: 4062
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The extra faces are caused if you hold CTRL down. CTRL = sweep faces separately, without CTRL = sweep faces together. |
Post by TomG // Aug 5, 2008, 2:31am
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TomG
Total Posts: 3397
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Sweeping faces separately while in Shell mode doesn't sound like a good plan :) I would say its unlikely to give expected or desired results, so for sweeping and getting a shell, not holding CTRL remains the way to go.
HTH!
Tom |
Post by Stem // Aug 5, 2008, 3:28am
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Stem
Total Posts: 199
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The extra faces are caused if you hold CTRL down. CTRL = sweep faces separately, without CTRL = sweep faces together.Could you check that.
I noticed this when extruding a single face from a cube, the faces are in between each extrude, so when you SDS those faces cause problems.
- Stem |
Post by Stem // Aug 5, 2008, 3:33am
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Stem
Total Posts: 199
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Hi Tom,
Sweeping faces separately while in Shell mode doesn't sound like a good planThat was my point
I would say its unlikely to give expected or desired results, so for sweeping and getting a shell, not holding CTRL remains the way to go.No, when sweeping a face, make sure shell is not selected, it makes no difference if ctrl or whatever is selected. or is it another bad install of TS on my PC?
- Stem |
Post by Jack Edwards // Aug 5, 2008, 3:35am
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Jack Edwards
Total Posts: 4062
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I cannot duplicate that with a cube primitive. It works fine for me and I don't get interior faces. Sounds like your faces for your original cube aren't connected or may be double sided, which would cause problems.
You can fix the non-connected issue by using the rectangle select tool to select the vertices of your model then use the vertex heal tool to weld all verts within a certain radius of each other. Or you could rectangle select over each vert (with select all geometry active) and click the weld tool to weld any duplicate vertices. |
Post by Stem // Aug 5, 2008, 3:47am
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Stem
Total Posts: 199
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I cannot duplicate that with a cube primitive.I am using a cube primitive.
It works fine for me and I don't get interior faces.Do you have shell seleceted when making the sweep?
Sounds like your faces for your original cube aren't connected or may be double sided, which would cause problems.This is a new install of TS, are you inferring that the cubes by default are being created incorrectly?
You can fix the non-connected issue by using the rectangle select tool to select the vertices of your model then use the vertex heal tool to weld all verts within a certain radius of each other. Or you could rectangle select over each vert (with select all geometry active) and click the weld tool to weld any duplicate vertices.I think it is a lot easier just to make sure shell is not enabled and was the point of my post on this.
- Stem |
Post by TomG // Aug 5, 2008, 4:03am
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TomG
Total Posts: 3397
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Well, shell should only be enabled when you want to shell the object, ie make it a hollow object. Naturally if you are just doing regular face sweeps, it ought to be off, as you don't want to be doing the shell processing in those cases.
Same with the boolean processing, only enable it for those particular kinds of operation. For general sweeping, all those options should be off.
HTH!
Tom |
Post by Jack Edwards // Aug 5, 2008, 4:19am
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Jack Edwards
Total Posts: 4062
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Stem, we must be talking about something different. :confused:
Here's a quick video testing the shell option for dynamic sweep and I also did an SDS layer to test the geometry as you mentioned. |
Post by Stem // Aug 5, 2008, 4:30am
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Stem
Total Posts: 199
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Hi Jack,
Stem, we must be talking about something different.My post/warning on this was related to if the user was going to sweep and to ensure the shell was disabled
A problem from the shell to mention, is if it is used when sweeping, and the intention is to perform SDS later
- stem |
Post by Jack Edwards // Aug 5, 2008, 4:51am
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Jack Edwards
Total Posts: 4062
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Ah guess I missunderstood then, definitely a good idea to turn off the boolean sweep options unless planning a boolean operation. :D
Yeah booleans and SDS can be tricky. Usually there's geometry clean up required. Workspace booleans are better than model side but there will still be cases where clean up is required. So agree with you there tool. ;) |
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