Self-intersecting polygon (areas with voids)

Revit
1

Hi guys

I’m doing a definition that takes data from Areas and applies them to Rooms lying within the Areas. This works fine (I btw found that curve.patch and geometry.doesintersect runs a lot faster than a containment test - nice) as long as there are no Areas with ‘voids’ - this will result in self-intersecting polygons. Unfortunately I cannot seem to find a solution for this problem.

3D.png903×611 76.6 KB

Space.png751×504 1.28 KB

Definition.png1626×743 126 KB

Do you have any input on this?

Thanks,
Christian

3

I’m not sure what do you mean by self intersecting polygons in this case.
Anyway I tried recreating this, although I don’t have Collector.Areas node, and it seems working.

Pasted image1490×738 77.5 KB

Can you explain what is the problem exactly?

4

Hi Viktor

The problem occurs when you have a situation like shown below (a “void” within the area);

In that case, neither Polygon.ByPoints nor PolyCurve.ByJoinedCurves seem to do the trick.

5

… just thinking; would it be possible to do test if one curve lies within another and then do a Geometry.Trim / Geometry.IntersectAll like discussed here? http://dynamobim.org/forums/topic/trim-one-surface-with-multiple-curves/

6

Hi again!
Try this:
rm area.dyn (21.8 KB)

It checks if the area has a void and should work for both areas with or without void. It uses solid booleans though so for a large number of areas it could be slow.

7

Hi Viktor

Thanks for the definition - unfortunately I’m not able to make it work. Is it possible for you to post an corresponding rvt file? Would be much appreciated!

8

… could also be areas within areas! It seems strange that this shouldn’t be a relatively simple thing to accomplish.

9

@Christian_Boggild_Sc i am having troubles doing something similar. Did you work out a solution?

10

Unfortunately not. I had to work around it by removing voids prior to running the definition. I still need to solve it though - I’ll let you know.