Josh Hancock Posted April 28, 2019 Share Posted April 28, 2019 Hi, I am trying to create a solid from the 6 NURBS surfaces in the attached drawing. For some reason VWX is not letting me combine them. I followed the same process which has worked for me before, which is to draw the NURBS curves and then combine into separate faces... Thanks in advance! create solid from nurbs.vwx Quote Link to comment
0 Kevin McAllister Posted April 28, 2019 Share Posted April 28, 2019 The issue here appears to be that some of the surfaces are 3D Polygons not NURBS surfaces. But on a bigger level there is something about this geometry that is preventing the solid you want to make. I tried various options without success. If I have time I may play with it a little more later. Kevin Quote Link to comment
0 Josh Hancock Posted April 28, 2019 Author Share Posted April 28, 2019 @Kevin McAllister that would be great! Thanks Kevin Quote Link to comment
0 Benson Shaw Posted April 28, 2019 Share Posted April 28, 2019 @Kevin McAllister has it right. The end caps are 3d polygons. @Josh Hancock I see that your object is a long ways from the Drawing Origin which is sometimes a problem. To test, I created a new layer and pasted a copy of the object at 000 and worked with it there. Not sure of your starting geometry, but I made it work by extracting all 4 top edges and all 4 bottom edges, composing them, making their directions the same, then Loft No Rail with Create Solid option. 1 Quote Link to comment
0 Kevin McAllister Posted April 28, 2019 Share Posted April 28, 2019 2 hours ago, Benson Shaw said: I see that your object is a long ways from the Drawing Origin which is sometimes a problem. To test, I created a new layer and pasted a copy of the object at 000 and worked with it there. Not sure of your starting geometry, but I made it work by extracting all 4 top edges and all 4 bottom edges, composing them, making their directions the same, then Loft No Rail with Create Solid option. Good catch with the origin. I tried the same method in place in the original file and couldn't get it to work. You solved the mystery. Kevin Quote Link to comment
0 Benson Shaw Posted April 29, 2019 Share Posted April 29, 2019 @Kevin McAllister one mystery solved (we think) , but another emerges for me. What is consensus about objects far from origin? Sometimes we need to locate things at great distance and be able to somehow work on them, eg if georeferenced or to accommodate positions in other software or for other reasons. Move the User Origin? I think this has its own problems and consequences which I can never remember, so I have not explored. Also, if this is viable where exactly does one place the User Origin ? Move things to drawing Internal Origin? But then move them again to previous locations? Some form of referencing via multiple files or design layer view ports? Eg place a guide object (3d locus at some corner point?), move all the geometry to another layer at drawing Origin, then snap a design layer view port to the guide object? But if something like this is recommended, then what part(s) do I port out to the other software? Other methods? -B Quote Link to comment
0 Kevin McAllister Posted April 29, 2019 Share Posted April 29, 2019 2 hours ago, Benson Shaw said: @Kevin McAllister one mystery solved (we think) , but another emerges for me. What is consensus about objects far from origin? Sometimes we need to locate things at great distance and be able to somehow work on them, eg if georeferenced or to accommodate positions in other software or for other reasons. Move the User Origin? I think this has its own problems and consequences which I can never remember, so I have not explored. Also, if this is viable where exactly does one place the User Origin ? Personally I would never move the user origin. I like the user origin and the internal origin to be the same. Its probably fine to do in newer versions of Vectorworks but in the past it could cause problems. 2 hours ago, Benson Shaw said: Move things to drawing Internal Origin? But then move them again to previous locations? Work in symbols? That would be a way to always edit objects near the origin, albeit the symbol origin. I tend to work this way but editing within symbols has been problematic in recent versions (seems better in VW2019 SP3.1). Sometimes with problem objects I will paste into a clean file, do my edits and then cut/paste back into my working file. Kevin 1 Quote Link to comment
0 Benson Shaw Posted April 29, 2019 Share Posted April 29, 2019 Thanks , Kevin. Good idea re symbols. -B Quote Link to comment
0 bjoerka Posted April 29, 2019 Share Posted April 29, 2019 another way... extract the curves from both top and bottom face loft each curve vertically select all 4 nurbs surfaces and make a solid addition extract 3 curves from the top and bottom birail these select all geometry and make another solid addition the result is a solid addition... SolidAddation.mp4 Quote Link to comment
Question
Josh Hancock
Hi,
I am trying to create a solid from the 6 NURBS surfaces in the attached drawing. For some reason VWX is not letting me combine them.
I followed the same process which has worked for me before, which is to draw the NURBS curves and then combine into separate faces...
Thanks in advance!
create solid from nurbs.vwx
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