Using List.Sort with delegates in C# script component ?

Hi!

I'm trying to sort a list of Polylines based on Z values within a C# script component using the List.Sort method and a delegate. However, after compiled, an error of 'not a delegate type' appears. Is there some way to create a delegate to do this ? Does it require the addition of another import such as system.linq ?

private void RunScript(List<Polyline> TopoCurves, object y, ref object A)
{

TopoCurves.Sort(delegate(Polyline a, Polyline b)
{
return a.First.Z > b.First.Z;
});
}

Replies to This Discussion

Permalink Reply by peter fotiadis on January 21, 2015 at 1:02pm

I'll prepare a "simple" example using a variety of sorting methods (and a challenge for the brave, he he).

In the mean time get the simplest possible way

Attachments:

sort_Polylines_V1.gh, 17 KB

Permalink Reply by Chris Rafuse on January 21, 2015 at 1:17pm

This is great. Thank you!. I see you used the OrderBy method. What about the List.Sort method ? Is it possible to use that with a delegate ?

Permalink Reply by peter fotiadis on January 21, 2015 at 2:06pm

Here we are : 3 ways to skin a cat (and a BIG challenge: win 1m(*) sardines, no kidding. see inside).

PS: there's a dedicated category for code matters (freaks only please, he he)

(*) m for micron

best, Peter

Attachments:

sort_Polylines_V2.gh, 31 KB

Permalink Reply by peter fotiadis on January 22, 2015 at 2:34am

And the final cut: 6 ways to skin a cat.

Spot the Generic one (only disabled minds please, he he).

PS: Added 2 more challenges for the (very) brave and/or for the (desperately) freak(s).

have fun, best, Peter

Attachments:

sort_Polylines_V3.gh, 37 KB

Permalink Reply by peter fotiadis on January 22, 2015 at 6:58am

And the end of the affair:

1. Added a C# that makes topoCurves out of a given Brep. These are sorted "in Z order". The "resolution" is user controllable but Rhino is slow for doing that kind of stuff. Obviously we are talking about Curves and NOT polylines (see below).

2. Now ... if you toggle true the magic option "makeChaos" ... you'll get a chaotic collection of topo Curves as regards Z. Then you can feed this to the SortSomething C# (provided that you can address the challenge n3, he he) and have a measure of the performance of each Sorting method provided.

best, Peter

Attachments:

sort_Polylines_V4.gh, 72 KB

Permalink Reply by peter fotiadis on January 23, 2015 at 12:34am

Er ... the code (function) used for "randomizing" could be the winner for the most stupid code ever - what was I "thinking"? (not much obviously, he he).

Get the corrected one (just one line and 123,45 times faster) plus a polyline output option.

Attachments: