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  <channel>
    <title>topic Re: Questioning about manuals ? in GDL</title>
    <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287894#M4335</link>
    <description>&lt;BLOCKQUOTE&gt;Peter wrote:&lt;BR /&gt;
&lt;BLOCKQUOTE&gt;LaszloNagy wrote:&lt;BR /&gt;
Peter,&lt;BR /&gt;
&lt;BR /&gt;
So if I understand correctly, we take the plane to which the V axis is the normal vector and which goes through the origin point of the V axis (any line in that plane is perpendicular to V). Then we take the vertical plane that goes through the V axis, and the W axis will lie in the intersection line of these two planes, and the W axis always points upwards. Is that correct?
&lt;/BLOCKQUOTE&gt;

Yes it is. But now reading your description again I realize it's more complicated.&lt;BR /&gt;
V is the normal of the bisector plane, not the vector from the previous point. Let's call that vector T.&lt;BR /&gt;
The bisector plane is important, rotation is defined using the UVW system.&lt;BR /&gt;
The profile size and shape is only correct at the midpoint if there is no twist along T (W's are parallel at both ends). Otherwise it's just an approximation of that, as we don't have points in the middle. &lt;BR /&gt;
&lt;BR /&gt;
I realize the most misleading thing in the documentation is using u, w for the profile coordinates, they are not along the UW axes. uw (perpendicular to T) is being projected to UW, using an orientation so that u' matches U. As a result of projecting a plane to a non-parallel plane, w' might not be parallel with W, the angle between u'w' might be non-perpendicular.
&lt;/BLOCKQUOTE&gt;

&lt;BR /&gt;
I have to be honest, I am now lost. You talk about UW, uw, u'w'. And you talk about uw being perpendicular to T, but in that case, shouldn't that axis be called t, not T? And where is the point in each segment where the section profile is the same size as the size of the profile defined in the script? Maybe an illustration would help, but now I don't think I fully understand how this works.</description>
    <pubDate>Sun, 22 Nov 2020 13:18:53 GMT</pubDate>
    <dc:creator>Laszlo Nagy</dc:creator>
    <dc:date>2020-11-22T13:18:53Z</dc:date>
    <item>
      <title>Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287821#M4262</link>
      <description>&lt;DIV class="actalk-migrated-content"&gt;Where is the place that I can propose the editing for manuals ?&lt;BR /&gt;&lt;BR /&gt;For instance, right now, when revising COOR, COOR{2}, COOR{3} GDL commands, there was no mentioning that the these take effect after defining a specific body.&lt;/DIV&gt;</description>
      <pubDate>Mon, 26 Sep 2022 20:57:02 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287821#M4262</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2022-09-26T20:57:02Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287822#M4263</link>
      <description>&lt;BLOCKQUOTE&gt;Moonlight wrote:&lt;BR /&gt;
Where is the place that I can propose the editing for manuals ?&lt;BR /&gt;
&lt;BR /&gt;
For instance, right now, when revising COOR, COOR{2}, COOR{3} GDL commands, there was no mentioning that the these take effect after defining a specific body.
&lt;/BLOCKQUOTE&gt;

Well you have mentioned it here - someone from GS may pick up on it.&lt;BR /&gt;
&lt;BR /&gt;
Or you could try the GDLCenter Forum ... &lt;A href="http://gdl.graphisoft.com/forums" target="_blank"&gt;http://gdl.graphisoft.com/forums&lt;/A&gt;&lt;BR /&gt;
That is monitored more by the GDL guys from Graphisoft - at least they reply more there than they do here (for GDL problems).&lt;BR /&gt;
&lt;BR /&gt;
Or send a support ticket to your local Archicad support people.&lt;BR /&gt;
&lt;BR /&gt;
Barry.</description>
      <pubDate>Thu, 14 Feb 2019 02:01:13 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287822#M4263</guid>
      <dc:creator>Barry Kelly</dc:creator>
      <dc:date>2019-02-14T02:01:13Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287823#M4264</link>
      <description>Thank you @Barrey</description>
      <pubDate>Thu, 14 Feb 2019 04:03:29 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287823#M4264</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-14T04:03:29Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287824#M4265</link>
      <description>@Barry&lt;BR /&gt;
&lt;BR /&gt;
here it is&lt;BR /&gt;
&lt;BR /&gt;
&lt;A href="http://gdl.graphisoft.com/forums/topic/proposition-about-gdl-reference-manual" target="_blank"&gt;&lt;LINK_TEXT text="http://gdl.graphisoft.com/forums/topic/ ... nce-manual"&gt;http://gdl.graphisoft.com/forums/topic/proposition-about-gdl-reference-manual&lt;/LINK_TEXT&gt;&lt;/A&gt;</description>
      <pubDate>Thu, 14 Feb 2019 15:40:05 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287824#M4265</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-14T15:40:05Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287825#M4266</link>
      <description>You can also make your further suggestion in this thread and I will report them to GRAPHISOFT for their consideration.</description>
      <pubDate>Thu, 14 Feb 2019 22:40:23 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287825#M4266</guid>
      <dc:creator>Laszlo Nagy</dc:creator>
      <dc:date>2019-02-14T22:40:23Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287826#M4267</link>
      <description>@LaszloNagy&lt;BR /&gt;
&lt;BR /&gt;
Here are they:&lt;BR /&gt;
&lt;BR /&gt;
&lt;A href="http://gdl.graphisoft.com/forums/topic/proposition-about-gdl-reference-manual" target="_blank"&gt;&lt;LINK_TEXT text="http://gdl.graphisoft.com/forums/topic/ ... nce-manual"&gt;http://gdl.graphisoft.com/forums/topic/proposition-about-gdl-reference-manual&lt;/LINK_TEXT&gt;&lt;/A&gt;</description>
      <pubDate>Thu, 14 Feb 2019 22:47:34 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287826#M4267</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-14T22:47:34Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287827#M4268</link>
      <description>Yes, I have seen that and I will forward that to GRAPHISOFT.&lt;BR /&gt;
I was talking about further/additional suggestions beyond the one you already wrote in that post.</description>
      <pubDate>Thu, 14 Feb 2019 23:05:29 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287827#M4268</guid>
      <dc:creator>Laszlo Nagy</dc:creator>
      <dc:date>2019-02-14T23:05:29Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287828#M4269</link>
      <description>Ok, I will take this advantage to write down few things:&lt;BR /&gt;
&lt;BR /&gt;
Manual:&lt;BR /&gt;
1. Style: for Variable names, insert "bmat" for building materials (page 494)&lt;BR /&gt;
2. Connection with Grasshopper, I think it's time that Graphisoft include snippets examples for GDL that is controled by Grasshopper, instead of mentioning it in Grasshopper manual only.&lt;BR /&gt;
3. Nurbs, the examples that are mentioned in the manual is quiet obscure, better &amp;amp; clearer examples should be set.&lt;BR /&gt;
4.Radial graphical hotspot, type 7 is not clear where it's place, beside, the example that is drawn should be shown in 3D, and not in 2D only.&lt;BR /&gt;
5. Object Migration, snippets must not only mention what they do but how, may be as comment in the examples that comes in the manual.&lt;BR /&gt;
6. GDL debugger, must be included in the manual with careful instructions of how to use it with examples.</description>
      <pubDate>Thu, 14 Feb 2019 23:52:33 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287828#M4269</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-14T23:52:33Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287829#M4270</link>
      <description>Thanks, I will forward also these to GRAPHISOFT.</description>
      <pubDate>Fri, 15 Feb 2019 07:59:08 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287829#M4270</guid>
      <dc:creator>Laszlo Nagy</dc:creator>
      <dc:date>2019-02-15T07:59:08Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287830#M4271</link>
      <description>@LazloNagy&lt;BR /&gt;
&lt;BR /&gt;
7. Examples for cutplane{2} is deficient</description>
      <pubDate>Wed, 20 Feb 2019 16:45:56 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287830#M4271</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-20T16:45:56Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287831#M4272</link>
      <description>@LazloNagy&lt;BR /&gt;
&lt;BR /&gt;
8. PROJECT2{3} needs examples</description>
      <pubDate>Thu, 21 Feb 2019 23:55:49 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287831#M4272</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-21T23:55:49Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287832#M4273</link>
      <description>&lt;BLOCKQUOTE&gt;Moonlight wrote:&lt;BR /&gt;
8. PROJECT2{3} needs examples
&lt;/BLOCKQUOTE&gt;

&lt;BR /&gt;
&lt;A href="http://gdl.graphisoft.com/tips-and-tricks/explore-the-project23-command" target="_blank"&gt;&lt;LINK_TEXT text="http://gdl.graphisoft.com/tips-and-tric ... 23-command"&gt;http://gdl.graphisoft.com/tips-and-tricks/explore-the-project23-command&lt;/LINK_TEXT&gt;&lt;/A&gt;&lt;BR /&gt;
&lt;BR /&gt;
The example object used is available in the link at the start of the page.&lt;BR /&gt;
&lt;BR /&gt;
&lt;BR /&gt;
&lt;BR /&gt;
Ling.</description>
      <pubDate>Fri, 22 Feb 2019 01:38:23 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287832#M4273</guid>
      <dc:creator>Lingwisyer</dc:creator>
      <dc:date>2019-02-22T01:38:23Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287833#M4274</link>
      <description>And that is why it should be included in the manual</description>
      <pubDate>Fri, 22 Feb 2019 22:00:36 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287833#M4274</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-22T22:00:36Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287834#M4275</link>
      <description>@LazloNagy&lt;BR /&gt;
&lt;BR /&gt;
9. Some neat tricks related to GDL creation would be nice.&lt;BR /&gt;
&lt;BR /&gt;
For example, the difficulty of using cutpolyA (&lt;I&gt;&lt;/I&gt;&lt;S&gt;&lt;I&gt;&lt;I&gt;&lt;/I&gt;&lt;/I&gt;&lt;/S&gt;&amp;amp; variants&lt;E&gt;&lt;/E&gt;) is that there is no direct way to see them in the GDL 3D preview, but you can write this for the manual (&lt;I&gt;&lt;/I&gt;&lt;S&gt;&lt;I&gt;&lt;I&gt;&lt;/I&gt;&lt;/I&gt;&lt;/S&gt;as an example&lt;E&gt;&lt;/E&gt;&lt;span class="lia-unicode-emoji" title=":disappointed_face:"&gt;😞&lt;/span&gt;&lt;BR /&gt;

&lt;BLOCKQUOTE&gt;&lt;U&gt;&lt;/U&gt;&lt;S&gt;&lt;U&gt;&lt;U&gt;&lt;/U&gt;&lt;/U&gt;&lt;/S&gt;Tips &amp;amp; tricks:&lt;E&gt;&lt;/E&gt;&lt;BR /&gt;
Working with &lt;B&gt;CutpolyA&lt;/B&gt; (&lt;I&gt;&lt;/I&gt;&lt;S&gt;&lt;I&gt;&lt;I&gt;&lt;/I&gt;&lt;/I&gt;&lt;/S&gt;and variants&lt;E&gt;&lt;/E&gt;) can be a little difficult to use since that there is no direct way to see them, especially when they don't give you the result that you wish.&lt;BR /&gt;
&lt;BR /&gt;
But modifying the code to be prism_ compliant then by commenting the first line as seen in following example can make your work process a lot more easier ...&lt;BR /&gt;
&lt;BR /&gt;
!cutpolyA 4, 3, 1,&lt;BR /&gt;
prism_ 4, 1,&lt;BR /&gt;
0.5, 0.5, 7,&lt;BR /&gt;
0.75, 0.5, 7,&lt;BR /&gt;
0.75, 0.75, 7,&lt;BR /&gt;
0.5, 0.75, 7
&lt;/BLOCKQUOTE&gt;</description>
      <pubDate>Sat, 23 Feb 2019 15:08:54 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287834#M4275</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-23T15:08:54Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287835#M4276</link>
      <description>Moonlight, &lt;BR /&gt;
You do not need to address your posts to me, it is enough to post them in this thread. I have forwarded it to GRAPHISOFT,</description>
      <pubDate>Sun, 24 Feb 2019 15:54:58 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287835#M4276</guid>
      <dc:creator>Laszlo Nagy</dc:creator>
      <dc:date>2019-02-24T15:54:58Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287836#M4277</link>
      <description>Done</description>
      <pubDate>Sun, 24 Feb 2019 15:57:10 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287836#M4277</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-24T15:57:10Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287837#M4278</link>
      <description>@LazloNagy&lt;BR /&gt;
&lt;BR /&gt;
This note should have been included in the GDL manuals&lt;BR /&gt;
&lt;A href="https://archicad-talk.graphisoft.com/viewtopic.php?p=11333#p11333" target="_blank"&gt;&lt;LINK_TEXT text="viewtopic.php?p=11333#p11333"&gt;https://archicad-talk.graphisoft.com/viewtopic.php?p=11333#p11333&lt;/LINK_TEXT&gt;&lt;/A&gt;</description>
      <pubDate>Thu, 28 Feb 2019 00:07:34 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287837#M4278</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-28T00:07:34Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287838#M4279</link>
      <description>By the way &lt;B&gt;CWALL_&lt;/B&gt; command doesn't even have a tiny whiny lousy example, and in the forums there is only 4 entries, being 1 as moderately related.  &lt;IMG src="https://community.graphisoft.com/legacyfs/online/emojis/icon_rolleyes.gif" style="display : inline;" /&gt;</description>
      <pubDate>Thu, 28 Feb 2019 00:10:34 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287838#M4279</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-28T00:10:34Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287839#M4280</link>
      <description>&lt;FONT size="150"&gt;&lt;B&gt;&lt;FONT color="#FF0040"&gt;NON GDL Side Note&lt;/FONT&gt;&lt;/B&gt;&lt;/FONT&gt;&lt;BR /&gt;
&lt;BR /&gt;
Graphisoft should start to ship it's API manuals as PDFs (2 to be accurate):&lt;BR /&gt;
1. One for reference.&lt;BR /&gt;
2. Second for first steps using API</description>
      <pubDate>Thu, 28 Feb 2019 00:13:46 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287839#M4280</guid>
      <dc:creator>Nader Belal</dc:creator>
      <dc:date>2019-02-28T00:13:46Z</dc:date>
    </item>
    <item>
      <title>Re: Questioning about manuals ?</title>
      <link>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287840#M4281</link>
      <description>&lt;BLOCKQUOTE&gt;Moonlight wrote:&lt;BR /&gt;
Graphisoft should start to ship it's API manuals as PDFs (2 to be accurate):&lt;BR /&gt;
1. One for reference.&lt;BR /&gt;
2. Second for first steps using API
&lt;/BLOCKQUOTE&gt;
The API reference documentation is fine the way it is:&lt;BR /&gt;
- It comes with linkage to VS and Xcode (for interactive use)&lt;BR /&gt;
- It's far quicker to open a small document for the info you're interested in (a PDF with the API reference would be enormous)&lt;BR /&gt;
&lt;BR /&gt;
Is there some specific advantage you're seeking from a PDF?</description>
      <pubDate>Thu, 28 Feb 2019 08:14:07 GMT</pubDate>
      <guid>https://community.graphisoft.com/t5/GDL/Questioning-about-manuals/m-p/287840#M4281</guid>
      <dc:creator>Ralph Wessel</dc:creator>
      <dc:date>2019-02-28T08:14:07Z</dc:date>
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