Hi,
I am trying to create surfaces from my areas created in area plans in my model. I need it to later figure out room locations and fill up department information etc.
Now I can create surfaces fairly easily when my area doesnt have cut outs or loops inside. But when My area has any cut out or loop I can’t seem to get a polyline or surface that is in a loop. Have spent quite a few hours trying to it out but no luck.
ANy hints would be great.
Search on “trim” in the Dictionary:
http://dictionary.dynamobim.com/#/Geometry/Surface/Action/TrimWithEdgeLoops
Hi Yna,
Thanks for the advice.
The issue is I can’t work out a way to find/generate the loops. It just gives me all the lines of the Area Boundary as a list. How do I generate separate polycurves for each loop? Every way failed.
Triming is quite possible only when I can have the distinct loops for each area right?
You will possibly find different solutions for that but one of them would be to use the OOTB PolyCurve.ByJoinedCurves node and/or Group Curves from Archilab.
Did you try Archilab nodes?
There are also a couple of options to be found through the search field:
https://forum.dynamobim.com/search?q=Group%20Curves
Why don’t you use the connected boundaries output on the Collector.Areas node?
This needs some more details to be understood.
At this stage, I get polygons out of it.
Room.Boundaries from Clockwork works also with the areasElements output.
Then PolyCurve.ByJoinedCurves creates the needed polycurves.
You could maybe need the help of a containment test but I don’t have time to check, see here:
http://dictionary.dynamobim.com/#/Geometry/Polygon/Action/ContainmentTest
The screen shot in my earlier post is actually a screen shot of how the collector node works. It is just using the Polycurv.byjoinedcurves to make a polygon. It doesn’t really consider cutouts or loops.
the room.boundaries does give the boundaries but the issue is the boundaries for areas dont really need to be joined always. It has a threshold in revit built in so it doesn’t always create a loop… so using the room.boundaries doesnt cut it for me sadly.
Try Surface.ByPatchPolyCurves (Chynamo). Optionally, double-clic on it to see how it’s build…
@Amrit_Banerjee Here is an example with an area with cut outs
Details on the custom node tstngwtrs-GroupCurves can be found here …
Yep it does work like a charm.
Could you mark the post as solved then?
Hi Vikram, That is probably the fastest solution. But could you explain me what actually the tstngwtrs-GroupCurves does?
Sure I will. Lemme figure out how to mark as solved first though 
Done
(click on the three points that can be seen at the back of each post, you will find a button with this tooltip: “This reply solves the problem”)
Probably because it doesn’t use any geometry intersection (which can be really heavy) to do it’s job.
If you have a list of shuffled curves, it groups together curves that form loops (open or closed)
The illustration at the link I’ve provided above should give you a fair idea of what it does.