topic Re: Sklight tool object -what command cuts the hole in the r in Libraries & objects

Sklight tool object -what command cuts the hole in the roof

Anonymous — Wed, 24 May 2023 09:53:35 GMT

Hello,
I looked at the 3D script of one of the skylight tool objects
to find the equivalent command to wallhole that cuts the
hole in the roof. I looked in the GDL manual but could not find
such a command. I noticed that the subtype of the roof tool
object was "Skylight" but there is no "Skylight" subtype in
the list of subtypes.

Does anyone know what GDL command cuts the hole ?
Perhaps it is not a command but some internal function
like what cuts the hole for a window or door when the
3D script does not contain a wallhole command.
Thank you,
Peter Devlin

Re: Sklight tool object -what command cuts the hole in the r

Erika Epstein — Wed, 04 Aug 2010 21:17:27 GMT

In the subtype choices, go to Opening>roof Opening>Skylight.

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 00:13:36 GMT

Hello Erika,
Thanks, I found it. I opened a new object,
changed its subtype to "Skylight", and
opened the 3D script window and Archicad promptly crashed.
This has happened twice. I was trying to make a very
simple object to test if and how a hole is made
in the roof. I guess I won't be able to because of this
crash behavior.
Thanks,
Peter Devlin

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 01:38:40 GMT

Just for fun I tried that, changing an objects subtype to skylight to see what happened. It did not crash AC (14). However it did not cut hole in roof.
Object was made with Objective, material glass, and had to use seo to cut hole.

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 03:02:22 GMT

Hello Lec,
I am sure it is not as simple as that.
I am assuming you have to use some of the
obligatory parameters in the 3D script to cut the hole.
Of course, I don't know for sure, which is
why I am asking the question.
Peter Devlin

Re: Sklight tool object -what command cuts the hole in the r

Erika Epstein — Thu, 05 Aug 2010 03:02:35 GMT

Peter wrote:
I guess I won't be able to because of this
crash behavior.
Peter Devlin

Is this one of the undocumented new features?
Sorry to hear about the crashes.

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 03:14:53 GMT

Peter wrote:
Hello Lec,
I am sure it is not as simple as that.
I am assuming you have to use some of the
obligatory parameters in the 3D script to cut the hole.
Of course, I don't know for sure, which is
why I am asking the question.
Peter Devlin

Sorry I should have made it more clear that the main thing I was responding to was that AC did not crash when I changed and objects subtype to skylight.
Also did not crash when I opened the 3d script window of the object with subtype set as skylight.
For whatever small amount that's worth.

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 03:18:36 GMT

Hello Erika,
I checked in my AC 12 demo version and AC did not crash
when opening the 3D script window, so I guess it is
an AC 10 thing. Because it is the AC 12 demo version
I am unable to save the lib part for testing on a roof.
I did notice that the AC 12 version of the roof window
lib part's parameter list is different than the AC 10 version.
I also noticed some other strangeness, like even though
certain parameters are not hidden in the parameter list
they do not show in the lib part's setting dialog.
There is something strange about this subtype.
Thanks,
Peter Devlin

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 06:39:06 GMT

Hello,

I think just making an object with "Skylight"-subtype should be enough to make a hole, even if no code added at all.

If you want to control the edge angles then new parameters should be added as mentioned in the "Fix named optional parameters"-documentation found here

(For other versions than 13 just change the version number in the link).



3. Parameters for add-ons

Add-ons can get values from library parts through parameters with predefined name and function. The list of such parameters in connection of the AC-package add-ons follow below.

3.1. Parameters of Skylight add-on

Hole edge cut manipulation

ac_edge_lower_type - integer
Cut type of the lower edge: 0 - Vertical, 1 - Perpendicular, 2 - Horizontal, 3 - Custom
ac_edge_lower_angle - angle
Angle of the cut of the lower edge, if ac_edge_lower_type is 3. The value range is [1-179] degrees, 90 is the perpendicular case.
ac_edge_upper_type - integer
Cut type of the upper edge: 0 - Vertical, 1 - Perpendicular, 2 - Horizontal, 3 - Custom
ac_edge_upper_angle - angle
Angle of the cut of the upper edge, if ac_edge_upper_type is 3. The value range is [1-179] degrees, 90 is the perpendicular case.

I made a demo object with just 2D code to visualize the object in the plan, nothing else. The hole appears automatically.



hotspot2 0, (b*cos(ac_roofang))/2

line2 -a/2, 0,  a/2, b*cos(ac_roofang)
line2  a/2, 0, -a/2, b*cos(ac_roofang)

rect2 -a/2, 0, a/2, b*cos(ac_roofang)!<---rect2 is not necessary, AC draws the edge automatically

Hope this helps.

Regards, Juha

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 06:41:19 GMT

The demo object is here, the edge angle parameters are added.

Regards, Juha

Re: Sklight tool object -what command cuts the hole in the r

Laszlo Nagy — Thu, 05 Aug 2010 09:08:10 GMT

I think the Skylight subtype cuts a rectangular hole by default into the Roof.
Just like basic Doors and Windows do in Walls when no WALLHOLE or WALLNICHE commands are defined in their script.
I am not aware of any GDL command that would cut a non-rectangular hole into a Roof that could be used with a Skylight.
I checked the Dormer Skylight object and even that cuts a rectangular hole.

Re: Sklight tool object -what command cuts the hole in the r

Erika Epstein — Thu, 05 Aug 2010 11:32:21 GMT

Juha,
I notice your skylight object sits only half in the hole created like the ones I have made. It doesn't seem to make a difference where I place the slab I turn into a skylight relative to 0,0,0.

Do you know why?

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Thu, 05 Aug 2010 18:42:27 GMT

Hello Juha,
Thank you very much for your information.
I think I can do some experimenting now.

Hello laszlo,
I suppose one could script fill bodies like we
did for non-rectangular windows and doors
before the wallhole command was introduced.
Thanks,
Peter Devlin

Re: Sklight tool object -what command cuts the hole in the r

Ralph Wessel — Thu, 05 Aug 2010 19:22:23 GMT

Peter wrote:
Does anyone know what GDL command cuts the hole ?

The hole-cutting is managed by an add-on. You can't do it with GDL. The add-on simply monitors the placement and editing of object of a particular subtype and manages the hole placement accordingly.

Re: Sklight tool object -what command cuts the hole in the r

Laszlo Nagy — Fri, 06 Aug 2010 10:26:49 GMT

Peter wrote:
Hello laszlo,
I suppose one could script fill bodies like we
did for non-rectangular windows and doors
before the wallhole command was introduced.
Thanks,
Peter Devlin

Yes, that would be interesting if you can obtain the A and B parameters of the roof hole.
What I don't know is whether you can make the edges of that hole disappear ( set their status to hidden, like you could do it with wall holes).
If you can do that, then I guess it is feasible.

Re: Sklight tool object -what command cuts the hole in the r

Ralph Wessel — Fri, 06 Aug 2010 10:43:35 GMT

laszlonagy wrote:
What I don't know is whether you can make the edges of that hole disappear ( set their status to hidden, like you could do it with wall holes). If you can do that, then I guess it is feasible.

The hole-cutting is performed by an add-on, i.e. using the ArchiCAD API via C/C++. You can't do this with GDL, and hence it won't be possible to control the edges etc.

Re: Sklight tool object -what command cuts the hole in the r

Anonymous — Sat, 07 Aug 2010 02:21:09 GMT

Hello Laszlo and Ralph,
I did an experiment with the "Skylight round 10" object.
I placed an instance of the object into a roof with the
flange set to circular. In 3D it shows as a circular object
sitting in a rectangular hole in the roof. With the roof tool,
I made four infill roofs to fill in the voids between the object
and the hole edges. In 3D, since in AC 10 and later, co-planer
surfaces clean up, the edges of the hole in the roof were not
visible. I am puzzled that the programmers at GS did not
put into the script infill bodies, since I believe that GDL objects
can clean up with AC tool elements with certain caveats.
This may have changed in later versions of the object.
Thanks,
Peter Devlin

Re: Sklight tool object -what command cuts the hole in the r

ztaskai — Tue, 10 Aug 2010 12:22:56 GMT

I see a pair of patching planes in the circular dome in the AC14 library. I think this is pretty much what can be done with the current technology.

There's something more advanced coming up but that won't solve your problems this year...

Best,