Search the Knowledge Base Report a bug
Post new topic   Reply to topic   printer-friendly view   .    ArchiCAD-Talk Forum Index >>> General Wishes >>> Real NURBS Modelling
View previous topic :: View next topic

What's your opinion about this wish?
Essential (5)
100%
 100%  [ 11 ]
Important (4)
0%
 0%  [ 0 ]
Average (3)
0%
 0%  [ 0 ]
Not important (2)
0%
 0%  [ 0 ]
Not needed (1)
0%
 0%  [ 0 ]
Average: 5.00 points
Total Votes : 11

Author Message
Constantin Cozma
Junior member
Junior member

Joined: 17 Sep 2009
Posts: 90
Location: Romania

PostPosted: Wed May 04, 2016 5:36 am    Post subject: Real NURBS Modelling Reply with quote

I dont even know if this is possible with current GDL structure but this would be the obvious step especially now with the new Rhino, Grasshopper- Archicad connection. Right now the curvatures are simplified polylines which cannot meet real construction purposes. DWG export is also affected by this because floorplan views cannot export curves, splines, circles, arcs.
I just saw a preview of Archicad 20 and there will be a new option to further smoothen the imported geometries. I am curious about it but still i dont think it can replicate real Nurbs and probably will make geometry really heavy.
Back to top
View user's profile Send private message    
laszlonagy
Site Admin
Site Admin

Joined: 20 Oct 2003
Posts: 7854
Location: Budapest, Hungary

PostPosted: Wed May 04, 2016 3:56 pm    Post subject: Re: Real NURBS Modelling Reply with quote

That preview you saw are real NURBS, since NURBS are now implemented into GDL in ARCHICAD 20. However, NURBS modeling is at this moment still not implemented in ARCHICAD modeling with construction elements.
_________________

Laszlo Nagy, Moderator, Site Admin
https://twitter.com/laszlonagy

i7-2630QM 16 GB RAM
17.3" (1920x1080), NVidia GTX 460M
SSD+HDD, Win10-64 ENG
AC13-AC21 (64-bit, latest build)
Loving ARCHICAD since 1995
Back to top
View user's profile Send private message Visit poster's website    
philips
Junior member
Junior member

Joined: 20 Aug 2009
Posts: 58
Location: Poland

PostPosted: Wed May 04, 2016 4:22 pm    Post subject: Re: Real NURBS Modelling Reply with quote

laszlonagy wrote:
That preview you saw are real NURBS, since NURBS are now implemented into GDL in ARCHICAD 20. However, NURBS modeling is at this moment still not implemented in ARCHICAD modeling with construction elements.


Does this mean that NURBS are now new GDL commands and it will be possible to write with text an object with real NURBS ?
Back to top
View user's profile Send private message    
laszlonagy
Site Admin
Site Admin

Joined: 20 Oct 2003
Posts: 7854
Location: Budapest, Hungary

PostPosted: Wed May 04, 2016 4:48 pm    Post subject: Re: Real NURBS Modelling Reply with quote

Yes, there are new NURBS commands in GDL. See my answer in the other thread:

http://archicad-talk.graphisoft.com/viewtopic.php?p=255028&highlight=#255028

_________________

Laszlo Nagy, Moderator, Site Admin
https://twitter.com/laszlonagy

i7-2630QM 16 GB RAM
17.3" (1920x1080), NVidia GTX 460M
SSD+HDD, Win10-64 ENG
AC13-AC21 (64-bit, latest build)
Loving ARCHICAD since 1995
Back to top
View user's profile Send private message Visit poster's website    
Constantin Cozma
Junior member
Junior member

Joined: 17 Sep 2009
Posts: 90
Location: Romania

PostPosted: Thu May 05, 2016 2:36 am    Post subject: Re: Real NURBS Modelling Reply with quote

laszlonagy wrote:
That preview you saw are real NURBS, since NURBS are now implemented into GDL in ARCHICAD 20. However, NURBS modeling is at this moment still not implemented in ARCHICAD modeling with construction elements.


Thats sounds great if this is the future! So the imported objects are real NURBS but just the graphic appearance can be adjusted from segmentation to smoothness? I see that initially the surface is still like a faceted mesh and changes with the new settings.
Wil we be able to convert any surface from Rhino, Grasshopper into a morph and not just meshes?
Back to top
View user's profile Send private message    
laszlonagy
Site Admin
Site Admin

Joined: 20 Oct 2003
Posts: 7854
Location: Budapest, Hungary

PostPosted: Thu May 05, 2016 2:17 pm    Post subject: Re: Real NURBS Modelling Reply with quote

OK, so, I don't know if NURBS will be implemented in ARCHICAD modeling as well in the future, I just hope it will be as it would open a lot of modeling capabilities for the program.

About the smoothness of the NURBS surfaces: So, this NURBS topic is rather new to me but if I look at the NURBSBODY GDL command what I can see is that internally the NURBS curves and surfaces are defined as real NURBS curves and surfaces and just for display purposes there is a smoothness parameter that can be set to different smoothness levels. Then, based on the smoothness level GDL approximates the NURBS surfaces and creates the triangulated surface. How well the triangulation approximates the real NURBS surface is based on the smoothness setting. This is what you could see in that clip.
But the point is that internally these are really defined as NURBS curves and surfaces.

The NURBS GDL Object can be converted to a Morph but the resulting Morph will become tessellated based on the current smoothness setting of the NURBS GDL Objects. Although the curves will be correctly replicated by the Morph, its edges and surface will not have NURBS intelligence (since NURBS is not implemented in ARCHICAD 3D modeling, only in GDL).

_________________

Laszlo Nagy, Moderator, Site Admin
https://twitter.com/laszlonagy

i7-2630QM 16 GB RAM
17.3" (1920x1080), NVidia GTX 460M
SSD+HDD, Win10-64 ENG
AC13-AC21 (64-bit, latest build)
Loving ARCHICAD since 1995
Back to top
View user's profile Send private message Visit poster's website    
Constantin Cozma
Junior member
Junior member

Joined: 17 Sep 2009
Posts: 90
Location: Romania

PostPosted: Thu May 18, 2017 8:01 am    Post subject: Re: Real NURBS Modelling Reply with quote

I`m just wondering, how difficult would it be to completely switch to nurbs modelling and display in GDL as well as for the construction elements? Would it require to completely re-write the whole modelling and display engine?
I am not saying that everyone needs to design and fabricate complex double-curvature surfaces but at least to be able to use splines in extrusion profiles and paths, for PRISM, TUBE, etc
I don`t quite understand the current NURBS implementation in GDL, since they cannot be used in the modelling and they don`t even display as such. Is like the information is there but you cannot use it. Or they are just the first step towards something bigger...

_________________
Intel Core I7-4700HQ 2.40 Ghz, 16 GB RAM
Archicad 20 Int 5025
Windows 10 Pro 64 Bit
Back to top
View user's profile Send private message    
arqrivas
Active member
Active member

Joined: 09 Jun 2015
Posts: 485
Location: USA

PostPosted: Thu May 18, 2017 3:00 pm    Post subject: Re: Real NURBS Modelling Reply with quote

Constantin Cozma wrote:
I`m just wondering, how difficult would it be to completely switch to nurbs modelling and display in GDL as well as for the construction elements? Would it require to completely re-write the whole modelling and display engine?
I am not saying that everyone needs to design and fabricate complex double-curvature surfaces but at least to be able to use splines in extrusion profiles and paths, for PRISM, TUBE, etc
I don`t quite understand the current NURBS implementation in GDL, since they cannot be used in the modelling and they don`t even display as such. Is like the information is there but you cannot use it. Or they are just the first step towards something bigger...


Same thinking here, I also hope they are working on something bigger, ARCHICAD is the only BIM software that is using segments instead of real curves so far, if I'm not wrong. This is a long wish for me, I am not working on organic building shapes, but the segmentation affects me on the modeling and documentation of the projects.

_________________
Please report back if the answer help you, this will help others with the same problem. Thanks!
AC 20 5023 INT, Windows 7 / Cinema 4D R17 and Blender
ArchiCAD Quick Tips https://www.youtube.com/playlist?list=PLX8TL9dDJUQ304aLMeF-0SZ6BBNDb_W_n
Back to top
View user's profile Send private message    
laszlonagy
Site Admin
Site Admin

Joined: 20 Oct 2003
Posts: 7854
Location: Budapest, Hungary

PostPosted: Sat May 20, 2017 9:25 am    Post subject: Re: Real NURBS Modelling Reply with quote

I think changing your 3D Engine from this segmented approach to a NURBS-based approach is a pretty big development task which takes years to do.
But the fact that NURBS are in GDL (in some form) gives me hope that GRAPHISOFT maybe has further plans of incorporating these types of geometries more deeply into ARCHICAD.

_________________

Laszlo Nagy, Moderator, Site Admin
https://twitter.com/laszlonagy

i7-2630QM 16 GB RAM
17.3" (1920x1080), NVidia GTX 460M
SSD+HDD, Win10-64 ENG
AC13-AC21 (64-bit, latest build)
Loving ARCHICAD since 1995
Back to top
View user's profile Send private message Visit poster's website    
Display posts from previous:   
View previous topic :: View next topic
Post new topic   Reply to topic   printer-friendly view       ArchiCAD-Talk Forum Index >>> General Wishes >>> Real NURBS Modelling All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB 2001, 2005 phpBB Group
Copyright 2012 - Graphisoft SE. All rights reserved worldwide. Terms of Use | Privacy Policy