topic Re: Curve Roofs in Modeling

Curve Roofs

Anonymous — Tue, 23 May 2023 13:01:05 GMT

Hi there,

I was just wondering if someone would be able to direct me to the right path.

I have a museum I'm designing and I would like the roofs not only to go from point a to point b with a gradual increase in their rise, but I would like to curve them with their sides.

I hope this attachment will help in knowing my issue more accurately.

Thanks for any help.

Re: Curve Roofs

owen — Fri, 04 Sep 2009 09:32:30 GMT

[Edit] I overlooked the 'increase in rise' .. so you would have to try below with beams, not walls (which would mean you can't put openings directly in them)

Assuming you mean the section is a constant along their length then a complex profiled wall would be the way to go. You could do it with the roof tool but it would take a lot more work and you would end up with a series of segmented or facetted roofs forming the larger roof curve in section. I know what you're thinking but thats just one of those decade old AC wishes that is yet to be fulfilled.

The roof in the top right corner is a bit more tricky as it seems to be irregular in plan so it cannot be done with a simple extrusion. Perhaps the geometry can be broken down into a series of intersecting extrustions? Hard to tell at this scale

cheers,

owen

Re: Curve Roofs

Ralph Wessel — Fri, 04 Sep 2009 14:11:43 GMT

Jamie_K wrote:
I would like the roofs not only to go from point a to point b with a gradual increase in their rise, but I would like to curve them with their sides.

Anything like the objects in the attached image? If so, take a look at OBJECTiVE

Re: Curve Roofs

Anonymous — Fri, 04 Sep 2009 15:46:40 GMT

I've got the same problem ... I want to make a dome shape roof with different height...
and I have not been able to find a solution with that kind of roof..

Re: Curve Roofs

Anonymous — Fri, 04 Sep 2009 15:59:57 GMT

christaline,

Perhaps you could try the "Beam Tool" + "Complex Profile"...

Open the AC Reference Manual and do a simple search with these two keywords.

If this wont help... Post an image of what you are trying to achieve.

HTH.

Re: Curve Roofs

Anonymous — Sat, 05 Sep 2009 01:20:36 GMT

Thanks for all the help =]

Though I was more along the lines of having my roof appear like this attachment. I'm not quite sure how I can do that with those shapes.

Re: Curve Roofs

Anonymous — Sat, 05 Sep 2009 10:32:53 GMT

Hi Jamie,

Jamie_K wrote:
I'm not quite sure how I can do that with those shapes.

If I were in this situation...
I'd use the mesh tool, which gives you a lot more freedom of modeling...
Fine tune the mesh...
Copy and elevate the same mesh...
Finally I'd do a simple subtraction SEO... like here.
HTH.

Re: Curve Roofs

Anonymous — Sun, 06 Sep 2009 03:16:07 GMT

Hi Braza,

I did as you said, though when i use the SEO having the target as the wall and the mesh as the element, and do a downward extrusion, the wall doesnt seem to cut.

I hope the attachment helps.

Re: Curve Roofs

Ralph Wessel — Sun, 06 Sep 2009 11:08:33 GMT

Jamie_K wrote:
I'm not quite sure how I can do that with those shapes.

Perhaps something like the attached image - I'm still not quite sure what you're after. These shapes take only seconds to make or change, so it's very easy to explore different alternatives. OBJECTiVE is free for educational use too.

Re: Curve Roofs

Anonymous — Mon, 07 Sep 2009 15:14:52 GMT

thank you Ralph and Braza.. thank you for all the solution...
now I can make a curve roof with different elevation using objective...
Jamie, maybe you must use objective tools to make those type of roof.. you can download that tools...

cheers,
christaline

Re: Curve Roofs

Anonymous — Fri, 11 Sep 2009 06:01:05 GMT

Hi again,

I've downloaded Objective, though it doesnt have those shapes inside it's library =S, all I'm trying to acheive is to make it look like, well basically like a scarf roof, how it's long and has random turns and elevations.

Re: Curve Roofs

Ralph Wessel — Fri, 11 Sep 2009 09:07:57 GMT

Jamie_K wrote:
I've downloaded Objective, though it doesnt have those shapes inside it's library =S, all I'm trying to acheive is to make it look like, well basically like a scarf roof, how it's long and has random turns and elevations.

Take a look through OBJECTiVE's reference manual to see how you can deform objects to complex shapes by bending, offsetting, and twisting. Some illustrations are attached - do the following to replicate it:

1) Open the OBJECTiVE tool and select the Regular Profile object. Set the cross-sectional size for the roof profile in the settings, select the method to place the profile by angle and length, and place a segment on the plan.
2) Use OBJECTiVE's Bend tool to shape the object to a curve (the result is shown in 3D)
3) View the object in elevation and use OBJECTiVE's Offset tool to lost one end.
4) Also while in elevation, use the Bend tool again to deform it vertically.
5) In the object's settings, set the twist angles to twist the object through and specified angle along its length
6) You can also change the profile of the object - draw the required cross-section with a fill, and use OBJECTiVE's New Profile to create the object.

You can create some amazing shapes by combining these tools. You can also freely cut and rotate these shapes in 3D to create larger assemblies.

Re: Curve Roofs

Anonymous — Sat, 12 Sep 2009 02:34:14 GMT

WOW!

Thank you so much Ralph for that, it really helped. And thank you to everyone else, I really appreciate it, just saved alot of time for me

Thank you again.

Re: Curve Roofs

Anonymous — Sat, 12 Sep 2009 14:55:54 GMT

I cannot trim my wall if I use Objective to make my curve roof..
any help?
I'm glad to see an answer soon..

lol

Re: Curve Roofs

Gerald Hoffman — Sat, 12 Sep 2009 15:21:31 GMT

Solid Element Operation (SEO) should work with Objective objects but Trim to Roof command will not.

Cheers,

Re: Curve Roofs

Ralph Wessel — Sat, 12 Sep 2009 22:12:34 GMT

christaline wrote:
I cannot trim my wall if I use Objective to make my curve roof..

As Gerald says, Solid Element Operations are the way to go. They work fine with OBJECTiVE components. I used them for some of the example images in this thread (where the walls are truncated to the roof form).

Re: Curve Roofs

Anonymous — Sun, 13 Sep 2009 14:09:31 GMT

finally i find it!!
i was blank with that stuff. lol
thank you so much