topic Re: how to model using tube in Modeling

how to model using tube

Llian — Sun, 07 Aug 2011 08:30:43 GMT

here's a fairly easy but can't figure out how ...can someone help please!
how do i model a tube [ 1-1/2" dia tube with elbow of 4" radius?

Re: how to model using tube

Anonymous — Sun, 07 Aug 2011 10:35:30 GMT

In the library under /special construction/basic shapes is a tube and elbow piece that will do what you want.

Re: how to model using tube

Llian — Sun, 07 Aug 2011 20:09:27 GMT

yes...i have tried them but just dont' know how to use the elbow....i just need to see a step by step video to understand.

Re: how to model using tube

Anonymous — Sun, 07 Aug 2011 20:31:07 GMT

It may be easier to use a profiled wall.

Re: how to model using tube

Llian — Sun, 07 Aug 2011 20:34:01 GMT

yes, the model i posted used the complex profile method. it's easier with flat tube but i can't figure out how to use a round tube with the same method....i'm sure ac has thought of that....

Re: how to model using tube

Llian — Sun, 07 Aug 2011 20:34:57 GMT

the model ..... with flat tube

Re: how to model using tube

Anonymous — Sun, 07 Aug 2011 20:36:58 GMT

Use the profile editor to make any shape you want.

Re: how to model using tube

Llian — Sun, 07 Aug 2011 20:39:14 GMT

thanks matthew.....but....how?

Re: how to model using tube

Anonymous — Sun, 07 Aug 2011 23:14:38 GMT

Use the custom profile editor to create the tube - then draw out the vertical and horizontal legs of the tube in plan - save each one as an object in the 3d window with the camera oriented to look down at what you want as the top end - then place the objects

Re: how to model using tube

Anonymous — Mon, 08 Aug 2011 16:45:46 GMT

I recommend not making the tube hollow unless you need to. It doubles the number of polygons.

Re: how to model using tube

Steve Jepson — Mon, 08 Aug 2011 21:56:52 GMT

if you want the profile to be smooth set these magic wand setting before you save the profile. I just discoverd this. Perhaps I was the last to know. ?
I was having problems getting smooth profiles.

Re: how to model using tube

Anonymous — Tue, 09 Aug 2011 03:06:20 GMT

if you want the profile to be smooth set these magic wand setting before you save the profile. I just discoverd this. Perhaps I was the last to know. ?
I was having problems getting smooth profiles.

That's a clever solution Steve!

When you have a true curve in your complex profile and it is applied to a piece of 3d geometry, ArchiCAD will automatically reduce the polycount by using something like the RADIUS function in GDL; turning your nice smooth circle/arc into a faceted shape. This is acceptable in a object with a large radius, but is very noticeable with smaller objects.

By forcing the fill to be made of many tiny Linear Segments, ArchiCAD can't apply this effect as there are no curves. This does mean, however, that your tube will have a higher polycount, so don't go overboard with the number of segments. (You have set it to have 360 linear segments! That's way too many! )

Still, it is useful to know how to manually adjust this setting if needs be.

As an aside, I have found Olivier Dentans 'Flexitube' objects useful for creating complex 3d tubular shapes. They are a little complicated to use, but do work well. There are both English and French versions in the zip file so give them a go perhaps -

http://archilib.od.pagesperso-orange.fr/

Re: how to model using tube

Llian — Wed, 17 Aug 2011 00:48:27 GMT

Here are 2 models using slab and hollow tube [ special basic shapes ]. I need to place # 2 onto # 1, but # 2 is perpendicular to # 1. Scott mentioned about using complex profile but I can't figure that out.....I just need to understand how to model object using the plan and side view settings!

Re: how to model using tube

Anonymous — Wed, 17 Aug 2011 01:01:24 GMT

for your second tube - select it and choose the view selection in 3d option from the view menu
move the view in the 3d window to look at whichever side of the tube you want to be the top, then save the model as .... from the library and objects option of the file menu - and your new object will be properly oriented

Re: how to model using tube

Llian — Wed, 17 Aug 2011 04:39:13 GMT

Thanks Scott !
Yes, I understand your reply now about using the Projections - Top, Side and Bottom to save a 3D object. I went through the ITG GDL interactive but really the tutorials skip some basic [magic ] steps like what you shared.

Re: how to model using tube

Steve Jepson — Fri, 01 Nov 2013 21:18:52 GMT

I like to show off my fancy morph tubes.

Re: how to model using tube

Anonymous — Sat, 02 Nov 2013 14:30:55 GMT

Congrats Steve, such a nice detailed job!
That deserves a good video tutorial.

Re: how to model using tube

Steve Jepson — Sat, 02 Nov 2013 15:10:21 GMT

Thanks. I just may do that. I am learning how to use Snagit.

Re: how to model using tube

Steve Jepson — Sat, 02 Nov 2013 15:19:23 GMT

Peter wrote:
if you want the profile to be smooth set these magic wand setting before you save the profile. I just discoverd this. Perhaps I was the last to know. ?
I was having problems getting smooth profiles.

That's a clever solution Steve!

When you have a true curve in your complex profile and it is applied to a piece of 3d geometry, ArchiCAD will automatically reduce the polycount by using something like the RADIUS function in GDL; turning your nice smooth circle/arc into a faceted shape. This is acceptable in a object with a large radius, but is very noticeable with smaller objects.

By forcing the fill to be made of many tiny Linear Segments, ArchiCAD can't apply this effect as there are no curves. This does mean, however, that your tube will have a higher polycount, so don't go overboard with the number of segments. (You have set it to have 360 linear segments! That's way too many! )

Still, it is useful to know how to manually adjust this setting if needs be.

As an aside, I have found Olivier Dentans 'Flexitube' objects useful for creating complex 3d tubular shapes. They are a little complicated to use, but do work well. There are both English and French versions in the zip file so give them a go perhaps -

http://archilib.od.pagesperso-orange.fr/

Yes, 360 linear segments is a lot for some things. What I am showing is what the limits of the smallest segments you can make in ArchiCAD.