logo
NOTICE:  This is the new PunchCAD forum. You should have received an email with your new password around August 27, 2014. If you did not, or would like it reset, simply use the Lost Password feature, and enter Answer as the security answer.
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

New Topic Post Reply
Options
Go to last post Go to first unread
murray  
#1 Posted : Tuesday, July 05, 2016 6:12:48 PM(UTC)
Quote
murray

Rank: Senior Member

Joined: 9/24/2014(UTC)
Posts: 112

Thanks: 2 times
Was thanked: 10 time(s) in 10 post(s)
Kind of a technical one, maybe Tim will answer? I've been fooling with the open-source FreeCAD program, which has many useful Python macros, one of which unrolls ruled surfaces, but sometimes chokes. I'm wondering if I use surface extend on a ruled surface, does the extension extend along the ruling lines, so that the surface including extension is still a ruled surface that the FreeCAD macro might unroll?
Tim Olson  
#2 Posted : Tuesday, July 05, 2016 10:10:25 PM(UTC)
Quote
Tim Olson

Rank: Senior Member

Joined: 2/2/2007(UTC)
Posts: 4,700
United States

Was thanked: 158 time(s) in 139 post(s)
>>I'm wondering if I use surface extend on a ruled surface, does the extension extend along the ruling lines, so that the surface including extension is still a ruled surface

Yes, the extended surface should still be a ruled surface.

As a quick check:

Edit: Change Object Type to Surface the Extended Surface

Select the surface and show the data entry tab of the inspector.

A ruled surface will have a degree v = 1. Degree 1 is linear. A degree 1 surface should be developable (unfold).

Do a Edit:Show Points to see the underlying control points


Tim

Edited by user Tuesday, July 05, 2016 11:13:41 PM(UTC)  | Reason: Not specified

Tim Olson
ViaCAD/Shark Development Team
EvoSoft
Links to ViaCAD Resources
murray  
#3 Posted : Tuesday, July 05, 2016 11:06:05 PM(UTC)
Quote
murray

Rank: Senior Member

Joined: 9/24/2014(UTC)
Posts: 112

Thanks: 2 times
Was thanked: 10 time(s) in 10 post(s)
Thanks Tim! That's excellent.

Murray
Quick Reply Show Quick Reply
Users browsing this topic
Guest (2)
New Topic Post Reply
Forum Jump  
You can post new topics in this forum.
You can reply to topics in this forum.
You can delete your posts in this forum.
You can edit your posts in this forum.
You cannot create polls in this forum.
You can vote in polls in this forum.