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View Full Version : Nurbs spaceframe - LWCAD 5.0042, LW 2015.3



BokadCastle
10-17-2015, 11:51 PM
I've made a simple roof spaceframe from nurbs, mainly "pipe" and "sphere".
My intention is to test and get familiar nurbs and LWCAD 5.*, rather than produce a nice model.
I'll spend the coming week with LWCAD 5 which is pretty good but I haven't yet got on top of instances in modeler.

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btw, nurbs do respond to constraints such hinges, even collision.

BokadCastle
10-18-2015, 12:02 AM
there are only 2 simple models, all nurbs:

1. https://drive.google.com/file/d/0B5Iq8yk8dpjROGxzM2c5X2phV1U/view?usp=sharing

2. https://drive.google.com/file/d/0B5Iq8yk8dpjRclVMeDRwN0FJU0k/view?usp=sharing

BokadCastle
10-18-2015, 12:54 AM
nurbs - colliding.

I used the content file "Hinge-Point 2 Point.lws" and replaced the nulls with my 2 nurbs models for the spaceframe.
All went well. This was a test to see what can and can't be done with nurbs.

https://drive.google.com/file/d/0B5Iq8yk8dpjRdnVHbFNyV2lfN00/view?usp=sharing

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BokadCastle
10-21-2015, 11:39 PM
I've been working on ways to "bend" a nurbs spaceframe - which can't be done.
My best method to date is this one.
I used spline control and instancing as per JH video -
https://www.youtube.com/watch?v=yft6Z6wbyM8


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Sloppy drafting, I've spent my time working out a method to achieve a curved structure.
The next step is to work out a double curvature structure and my sloppy drafting has given me a few ideas.

Skonk
10-22-2015, 03:25 AM
So can LWCad's nurbs be rendered without converting to polygons?

BokadCastle
10-22-2015, 03:39 AM
So can LWCad's nurbs be rendered without converting to polygons?

Yes, in LW 2015.3

I have other LW versions, but have not tried and won't.

Cheers. :)

Skonk
10-22-2015, 03:43 AM
Ah nice; just put an upgrade order in for LWCad 5 beta (from 4) so looking forward to giving it a go :)

BokadCastle
10-22-2015, 04:10 AM
The image I posted of curved splined instances was an F9.
You'll be OK.
Cheers, Terry.

Skonk
10-22-2015, 12:20 PM
What settings are you using to render the nurb wireframes?

EDIT: Ah never mind; just the stand edge rendering :)

BokadCastle
10-22-2015, 07:11 PM
render settings -

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BokadCastle
10-23-2015, 04:04 AM
I've tidied up - the top and bottom chords go straight through in both directs.
The VPR render time is shown.

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rcallicotte
10-23-2015, 09:54 AM
LWCAD 5 is available to upgrade for LWCAD 4 owners?

BokadCastle
10-25-2015, 09:06 PM
Sorry, I've been watching the Rugby World Cup, so not much work progress.
I haven't achieved double curvature (with nurbs).
So far.

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BokadCastle
10-25-2015, 09:08 PM
This is why it's important to achieve double curvature.

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BokadCastle
10-25-2015, 09:13 PM
I know Proton's tut on microphone grill with lines, and I think neg line thickness and dropping on a ball.
That's not applicable here.

seghier
10-26-2015, 01:57 AM
Nice ; is lwcad 5 a good choice than rhino in terms of price and features ?

meshpig
10-26-2015, 04:21 AM
For some reason (for mac users ) El Capitan/2015.3/LWCAD 5 isn't converting curves to nurbs surfaces. Lofting is fine but you just get n-gons/faces when you convert curves to surfaces.

lertola2
10-26-2015, 07:23 AM
For some reason (for mac users ) El Capitan/2015.3/LWCAD 5 isn't converting curves to nurbs surfaces. Lofting is fine but you just get n-gons/faces when you convert curves to surfaces.

Did you report this bug? Send bug reports to [email protected]

meshpig
10-27-2015, 01:00 AM
Thanks lertola2, reported.

Waves of light
10-27-2015, 02:43 AM
Impressive stuff Bokad.

BokadCastle
10-28-2015, 02:09 AM
Go Wallabies.

hrgiger
10-28-2015, 02:55 AM
Nice ; is lwcad 5 a good choice than rhino in terms of price and features ?

LWCAD 5 is first implementation of nurbs so it can't compete with Rhino. But it will be getting better with each update.

BokadCastle
10-28-2015, 03:26 AM
I can't find a way to double curvature, which is annoying.
With control..that is.

I'm also annoyed that this is common in both Revit and Sketchup.

Perhaps "annoyed" was the wrong word, I'm more frustrated.
I'm attempting to do what is obvious to me but can't find a way in LW.

BokadCastle
10-28-2015, 09:37 PM
I can't find a way to double curvature, which is annoying.

Perhaps "annoyed" was the wrong word, I'm more frustrated....

Pull yourself together, man!...falling about like a jibbering gitwit.

BokadCastle
10-28-2015, 09:42 PM
Yes...Ok then.

Tah-Dah. One double-curved architectural thingmee.

Using one simple nurbs model and 'spline control instancing'.
No crashes - very stable in Layout.

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BokadCastle
10-29-2015, 01:04 AM
Go Wallabies!


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BokadCastle
10-29-2015, 02:12 AM
Um...do you hear voices?

- - - Updated - - -

No, do you?