topic Re: Custom section marker in Libraries & objects

Custom section marker

Bruce — Sun, 04 Feb 2018 20:55:02 GMT

I have created my own section marker, but can't figure out how to adjust the beginning of the section line itself - what happens is that it crosses into the marker head.

I have gone through the Built-In marker script, but can't see what they've done differently to achieve this. Does anyone know how to do this (see image)?

Re: Custom section marker

Piotr Dobrowolski — Mon, 05 Feb 2018 08:22:55 GMT

Probably You need to move the marker outside by the R of the circle.

Piotr

Re: Custom section marker

Bruce — Mon, 05 Feb 2018 18:49:41 GMT

Thanks Piotr - that's what I thought too, but that would then misalign the head with end of the section line (see image).

Re: Custom section marker

Bruce — Mon, 05 Feb 2018 18:51:36 GMT

...and adjusted

Re: Custom section marker

Piotr Dobrowolski — Mon, 05 Feb 2018 21:18:30 GMT

OK,
How did You managed the line?

Piotr

Re: Custom section marker

Lingwisyer — Tue, 06 Feb 2018 02:50:42 GMT

Wouldn't the symbol location be dictated by the symbols 2d origin, or base hotspot? So you'd need to move/crop the line without moving said origin/hotspot? Not sure how the marker is constructed, have yet to look at it... and I'm pretty blah at GDL atm...

Ling.

Re: Custom section marker

Bruce — Tue, 06 Feb 2018 18:39:18 GMT

Piotr wrote:
OK,
How did You managed the line?

I inserted an ADD2 command to draw the marker away from the origin - but as you can see, it is now misaligned with the section end point (marker on the left). The marker on the right is the GS Built-In Marker, and it achieves what I want without misaligning with the end of the section line.

I've inspected their code, but can't figure out how they did this.

Re: Custom section marker

Lingwisyer — Wed, 07 Feb 2018 04:23:31 GMT

Does the marker's circle have a fill active? Can you modify your draw order with the drawindex command? Not quite sure how it works as I haven't needed to use it... =/

Ling.

Re: Custom section marker

Bruce — Wed, 07 Feb 2018 19:33:05 GMT

Using a fill has no impact on the display of the section line (which is drawn by Archicad, not by the part). The GS part has no DRAWINDEX in it, so that's not the solution. I'm at a loss.

Re: Custom section marker

Lingwisyer — Thu, 08 Feb 2018 03:02:09 GMT

Though it may not be how the default marker crops the line, nor ideal, it would still achieve the same appearance given that the marker head is generated above the section line. Do you have a copy of the marker extracted that I could grab? Can't find where it is...

Ling.

Re: Custom section marker

Bruce — Thu, 08 Feb 2018 03:19:14 GMT

I don't think it is. My experiments with masking fills make no difference to the section line display.

Re: Custom section marker

Daniel Kovacs — Fri, 16 Feb 2018 13:03:46 GMT

Hi,

Maybe you should put this question on the GDL forum instead. I am sure someone there will be able to help you.

Regards,

Re: Custom section marker

Bruce — Fri, 16 Feb 2018 18:42:01 GMT

Thanks Daniel - I did that first actually...but no one there can help either.

http://gdl.graphisoft.com/forums/topic/section-marker-tail

Re: Custom section marker

JaseBee — Thu, 22 Feb 2018 04:53:08 GMT

Hi Bruce,

Saw your issue and decided to have a look as I'll be tackling my own custom one before long...

I think I might have solved it, without even looking at the GDL code.

I made a graphic to explain it but can't for the life of me figure out how to upload it.

Basically you turn the section tails on and off in the marker settings of the section marker info box.

I got the standard marker to display the tail over the top of the marker just like your custom one, which to me says they couldn't even figure out how to avoid it also.

Hope this helps.
Jase.

Re: Custom section marker

Barry Kelly — Thu, 22 Feb 2018 05:48:45 GMT

It looks like this may have been answered over on the GDL Center forum.

http://gdl.graphisoft.com/forums/topic/section-marker-tail

Gergely wrote:
You need to set/use the AC_MarkerSize parameter correctly, it will shorten the line to the proper length.

Barry.

Re: Custom section marker

Bruce — Thu, 22 Feb 2018 19:01:46 GMT

Thanks Barry. For some reason I didn't get a notification (sometimes I do, sometimes I don't).

Anyway, for future reference, the key is to set the parameter AC_SectionLineStartOffset (not AC_MarkerSize). However, this will set the offset of the line for both ends - you can't (well, I couldn't) test with SYMB_MIRRORED to shorten one end and not the other.

I would say it's because the line is drawn as a whole, then the marker script is run (or vice versa). Would be nice to have an AC_SectionLineStartOffset1, and AC_SectionLineStartOffset2 parameter, to set each end.

I think I'll live - there are other higher priorities for GS.