topic Re: GDL Revolve Issues in Libraries & objects

GDL Revolve Issues

Anonymous — Thu, 13 Mar 2008 00:17:03 GMT

Hello.
I was wondering if anyone had an idea on a problem I was having with the GDL scripting of an object. I am basically trying to create a smashed dome, which I could do using CUTPLANE and SPHERE, but I want to make the object parametric, and am weary of finding an equation which would adapt the cutplane's orientation based on the radius of the sphere (if anyone has an idea on where to look for that, that would also be appreciated).

My issue is that in order to REVOLVE something, it cannot be below the X-Axis, so that means I draw half the arc, and then rotate that a full 360 degrees to obtain the final shape. When I REVOLVE this, it creates a "nipple" at the point of the rotation in the 3D view. I can jack up the RESOL of the object, but the "nipple" still shows at the top of the REVOLVE. I am attaching a picture of what I am taking about (its the darker spot on the top of the dome). Below is the GDL script for the REVOLVE command I am using. Am I missing something? Any hints, tips, advice would be much appreciated.
Thanks in advance.

ROTy -90
REVOLVE 19,360,61,
0'-0.0000", 0'-0.0000", 3'-3.3701",
0'-0.0000", 0'-0.0000", 3'-3.3701",
0'-9.0000", 0'-0.0012", 1,
0'-8.9640", 0'-2.1939", 1,
0'-8.8562", 0'-4.3842", 1,
0'-8.6765", 0'-6.5698", 1,
0'-8.4252", 0'-8.7484", 1,
0'-8.1026", 0'-10.9175", 1,
0'-7.7091", 1'-1.0749", 1,
0'-7.2450", 1'-3.2182", 1,
0'-6.7108", 1'-5.3451", 1,
0'-6.1072", 1'-7.4534", 1,
0'-5.4347", 1'-9.5408", 1,
0'-4.6941", 1'-11.6049", 1,
0'-3.8862", 2'-1.6437", 1,
0'-3.0119", 2'-3.6548", 1,
0'-2.0720", 2'-5.6362", 1,
0'-1.0677", 2'-7.5857", 1,
0'-0.0000", 2'-9.5012", 1

Re: GDL Revolve Issues

Dwight — Thu, 13 Mar 2008 01:05:04 GMT

With all due respect, instead of messing with GDL code, why not make the dome architecturally accurate using a custom profile/curved wall? You can add the collar beam at the bottom, and even a vertical wall or other support structure, and put windows in it and make it have detail.

This can be highly parametric because you can leave all kinds of line work in the custom profile window to support the evolution of your element.

AND it will be smoother!!

And you only get a nipple if you model it.

Re: GDL Revolve Issues

David Maudlin — Thu, 13 Mar 2008 13:12:36 GMT

A.I.T:

The problem is near the top of the command, you have two lines of:
0'-0.0000", 0'-0.0000", 3'-3.3701",
which are creating additional points at the center of the bottom, so the smoothing algorithm in the rendering or OpenGL engine is creating the curve downwards (not seen in the internal engine mode). The top of your code should be:
REVOLVE 18,360, 61,
0'-9.0000", 0'-0.0000", 1,
0'-9.0000", 0'-0.0012", 1,
0'-8.9640", 0'-2.1939", 1,
I have eliminated one of the duplicate points, and put the first point at the top of the dome. I don't know where these additional points came from, or why their status codes are set to the English unit equivalent of one meter, it looks like something from an auto-scripted object.

HTH

David

Re: GDL Revolve Issues

Anonymous — Thu, 13 Mar 2008 16:38:32 GMT

Thanks for the help. I changed those lines of code, and it worked out great. I dont know where that extra code came from either, but now I know what it did.

Thanks again.

Re: GDL Revolve Issues

Anonymous — Thu, 20 Aug 2009 19:01:43 GMT

Hi Dwight,

I just tried this...made a nice straight wall, but curved wall button was unavailable.

Where did I go wrong?

Thanks,

Bob

Dwight wrote:
With all due respect, instead of messing with GDL code, why not make the dome architecturally accurate using a custom profile/curved wall? You can add the collar beam at the bottom, and even a vertical wall or other support structure, and put windows in it and make it have detail.

This can be highly parametric because you can leave all kinds of line work in the custom profile window to support the evolution of your element.

AND it will be smoother!!

And you only get a nipple if you model it.

Re: GDL Revolve Issues

Dwight — Thu, 20 Aug 2009 19:25:48 GMT

Hi, Bob! Glad to see things go so well with your painting.

It works: Follow my setup in the attached illustration to make curved walls from a radius point.

Also, when making freely curving wall segments, always use the polysegment wall tool. You WILL get the curved option in the pet palette.

Re: GDL Revolve Issues

Dwight — Thu, 20 Aug 2009 19:45:46 GMT

Bob: What version is your Archicad?

Re: GDL Revolve Issues

Rod Jurich — Fri, 21 Aug 2009 00:48:31 GMT

Dwight wrote:
Bob: What version is your Archicad?

See here DA

Re: GDL Revolve Issues

Dwight — Fri, 21 Aug 2009 01:08:30 GMT

Well. That is that. Bob is definitely one user who could benefit from upgrading what with doing domes and such.

Re: GDL Revolve Issues

Anonymous — Fri, 21 Aug 2009 08:58:28 GMT

Dwight,
How do you get the vertical ribs in the dome?

Re: GDL Revolve Issues

Dwight — Fri, 21 Aug 2009 16:33:41 GMT

It is two complex profiles.

You will see how magic wanding the complex profile wall [to a guide circle] with segments instead of "best match" yields short straight segments instead of an artificial curve.

Place the other complex profile at the intersections.

Re: GDL Revolve Issues

Anonymous — Sat, 22 Aug 2009 01:09:18 GMT

Thanks