How to get a quad grid from random points?

Replies to This Discussion

Permalink Reply by Mateusz Zwierzycki on October 15, 2013 at 6:40pm

http://www.grasshopper3d.com/group/elk

Permalink Reply by Margherita Valle on October 15, 2013 at 11:04pm

Thanks! Now I have the map in Grasshopper... but the curves don't work with ShortestWalk...

Any idea why?

Permalink Reply by Giulio Piacentino on October 16, 2013 at 11:28am

Hi Margherita,

this is how you can supply curves and get results from ShortestWalk. ShortestWalk understands lines only. So you'll have to get the line graph (connecting end points of the "exploded" curves).

You can however assign an arbitrary length for each line, to override the line length. That length will be used in place of the line factual length. If you decide to override the understood length, you'll have to provide a length for each line that you feed into the component.

I hope this helps,

Giulio

--

Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Attachments:

• shortest-walk.gh, 9 KB

Permalink Reply by Margherita Valle on October 16, 2013 at 11:40am

Fine, I understand.

Thanks!

Permalink Reply by Margherita Valle on October 16, 2013 at 3:55pm

Ok I achieve the goal well...

But I have a doubt: how about the little segments that doesn't complete the walk (from yellow circle to yellow circle)?

I know... it's because my curves are one for every city block side, I have to shatter this or to divide all the curves, or..? What is the best way?

Permalink Reply by Giulio Piacentino on October 28, 2013 at 2:23am

Hi Margherita,

yes, one simple approach would be to shatter all curves and then using them together. Alternatively, just for your case here, you might want to search the closest line to each end point, and then only split that one?

Giulio

--

Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Permalink Reply by Margherita Valle on October 29, 2013 at 10:14am

Ok, can you show me how I have to split the line after the ShortestWalk?

Permalink Reply by Richard Schaffranek on November 5, 2013 at 4:43am

Hallo Margherita,

I wounder what you are after is it really only the shortest walk or are you planing to do anything with it?

Permalink Reply by Margherita Valle on November 5, 2013 at 8:35am

Hi!

No, for the moment shortest walk it's only a part of few exercices that I'm working with in urban context analysis and diagrams.

Why? You are working at something similar?

Permalink Reply by Richard Schaffranek on November 6, 2013 at 2:50am

No I was just wondering why it is important that the shortest path actually ends at a point on a street segment? Because when thinking of all sorts of analysis then it is always about the street segment and not necessarily at a point on a street segment.

-> similar, well to some extend -> SpiderWeb

Permalink Reply by K YANG on March 5, 2017 at 3:43pm

Hi Margherita,

I wonder how you finally create a quad-grid mesh from these points?

Thank you