Relative coordinates of Points in Dynamo

[m.shcheblykin]

Hello. I’m trying to find a better way how to sort 4 points sets for paneling with Dynamo (adaptive families). Do you have any ideas how I can get relative coordinates of already existing points?
How can I get here the coordinates of the point from, lets say, new origin? Eventually It must work with thousands of points sets where each will get it’s new origin…

[Nick_Boyts]

This post might be helpful.

Point Coordinate System

Hello all, thank you in advance. I have a simple&basic and embracing questions First of all how can i see a coordinate system icons of points ? like this [image] at the moment it is hard to foresee how components will be aligned without seeing this coordinate systems. Second question, lets say i want to extract one coordinate system from one point and empose it to all other points.I am hoping that this will place all adaptive components to the points in same manner. Somewhere i make a m…

If you create your points from different coordinate systems you should be able to get their relative coordinates. I’m wondering if this is even necessary if you keep your panel points in sublists though.

[m.shcheblykin]

Its necessary because I’m working with surfaces that were created in other software like Rhino, AutoCAD etc.
And Vertices Points of surfaces sorted in random orders in sub lists. So for paneling with adaptive families its crucial to have all of them in the right order.

I didn’t create anything from different coordinate systems. I just import geometry, regenerate it in dynamo…

[Nick_Boyts]

But if your vertices are in sublists you should be able to keep them in sublists. I think there’s a node to order points clockwise or something similar. I believe if you patch the points into a polygon then get the vertices again in Dynamo they should be returned in order.

[jacob.small]

Would converting the points to UVs be easier?

[m.shcheblykin]

I will check this concept

Return A List of Points From Intersect That Create a Clockwise Polygon

Does anyone have an example of how to sort points retrieved from intersection of geometry into a ordered list of points either clockwise or counterclockwise that forms a closed polygon. Trying to avoid self crossing polygon.

[m.shcheblykin]

This is what I usually get for UV points when I start with external geometry

I think I should create a topic for developers where this Dynamo issuer will be fully explained

[jacob.small]

I thought you already had the points and surfaces, so you would be able to do Surface.UVAtPoints, which would allow for faster computing. Would love to see the write up in question though.

[Vikram_Subbaiah]

@m.shcheblykin

how to sort 4 points sets for paneling with Dynamo (adaptive families)

Assuming you want to sequence points such that they create a non-intersecting boundary, see if this works for you…

boundaryCurve.dyn (14.2 KB)

def seq(pt:var[])
{
	ct = Point.ByCoordinates(Math.Sum(pt.X)/List.Count(pt),Math.Sum(pt.Y)/List.Count(pt));
	qa = Math.Round(Vector.ByTwoPoints(ct,pt).Normalized().AngleAboutAxis(Vector.YAxis(),Vector.ZAxis()));
	q1 = List.GroupByKey(List.SortByKey(pt,qa)["sorted list"],List.SortByKey(pt,qa)["sorted keys"])["groups"];
	q2 = List.Flatten(List.SortByKey(q1<1>,(Point.ByCoordinates(q1.X,q1.Y).DistanceTo(ct))<1>)["sorted list"],-1);
	return = q2;
};
pt1 = seq(pts);

[m.shcheblykin]

Hello Mr.Vikram
Thank you so much for this logic with vector angle. I have learned a new way of data arrangement. I have studied your script very thoughtful and I would like to ask about q1 and q2.
Actually it works already at q1 with out List.GroupByKey node that you assigned at the very beginning of its row.
So starting from the List.GroupByKey node and all q2 is designed for cases where we have a lot of points close to each other in another words its an insurance for all possible cases. Am I right ?

here I Just put your script in more readable form

[Vikram_Subbaiah]

@m.shcheblykin

q2 is designed for cases where we have a lot of points close to each other in another words its an insurance for all possible cases. Am I right ?

Yes, I suppose
Helps ensure it works even with numerous points …

[p.smithSTNZ]

this was a huge help for a problem I had Vikram, thanks

[shashank.baganeACM]

Hi @Vikram_Subbaiah I am getting this error

can you please tell me why ?

[Vikram_Subbaiah]

List seems to have a conflict with other installed packages.
Prefix List with DSCore. (or use the code below, if you’re using a more recent Dynamo version)

def seq(pt:var[])
{
	ct = Point.ByCoordinates(Math.Sum(pt.X)/DSCore.List.Count(pt),Math.Sum(pt.Y)/DSCore.List.Count(pt));
	qa = Math.Round(Vector.ByTwoPoints(ct,pt).Normalized().AngleAboutAxis(Vector.YAxis(),Vector.ZAxis()));
	q1 = DSCore.List.GroupByKey(List.SortByKey(pt,qa)["sortedList"],DSCore.List.SortByKey(pt,qa)["sortedKeys"])["groups"];
	q2 = DSCore.List.Flatten(DSCore.List.SortByKey(q1<1>,(Point.ByCoordinates(q1.X,q1.Y).DistanceTo(ct))<1>)["sortedList"],-1);
	return q2;
};
pt1 = seq(pts);

[shashank.baganeACM]

Got it @Vikram_Subbaiah Thank you so much

[sandeep.bhatia439]

Hi Vikram,
I am trying to use your code to sort out the points to create a closed polygon. But I am getting these warnings. Can you please help?
Its Revit 2024.2 and Dynamo 2.19.3
Thanks in advance

[jacob.small]

Either uninstall Wombat or prefix each use of “Point” and “Vector” with some portion of Autodesk.DesignScript.Geometry. (starting with Geometry. and if that doesn’t work try DesignScript.Geometry and then Autodesk.DesignScript.Geometry.).

[sandeep.bhatia439]

Thanks @jacob.small. The warning is gone by using any of the prefixes you mentioned but its not providing any output.

[jacob.small]

lines 3 to 6 out of the code block and paste them into a new one. That should expose the warning that’s being repressed by the definition at the moment.