Gradient on Curves

Hello Everyone, I am doing a water flow analysis on a steep terrain with grasshopper. In order to do that, I used mosquito to do a flow definition, where curves on the surface that represents the terrain tell me the way water would flow. What I want to do after I have these curves, is to apply a gradient that will vary the color according to their separation. For example, a red gradient would show dark intense red as lines get together to eachother, and lightter colors such as orange and yellow as they start getting apart. Is there a way to do that? I am new to GH and don't really know much about it. Thanks in advance!

Below are both the rhino and the definition.

Escorrentias.3dm

Escorrentias.gh

Replies to This Discussion

Permalink Reply by phillip on June 11, 2013 at 6:51am

Hi,

One way would be to divide the curves and assign colors acc. to the point density.

Obviously for better results you need to exclude some parameters like parallel or short curves.

But this could be a start:

Attachments:

ColorByDistance.gh, 29 KB

Permalink Reply by Tomás Asenjo on June 12, 2013 at 9:48am

Thanks a lot phillips! Ill take a look at it! Looks good, and simple!

Permalink Reply by francesco perego on June 30, 2016 at 8:14am

is possible to select curve from color?

for example, from our sketch select only yellow curve?

thanks

Permalink Reply by Richard Schaffranek on June 12, 2013 at 10:19am

Hi,

What scale you are working on?

Is it important to you to have a continuous space.

Or could the water flow be calculated grid based?

if yes, you could use the Drainage Pattern sample from SpiderWeb.

Permalink Reply by Tomás Asenjo on June 12, 2013 at 1:36pm

Hi richard, from one extreme to the other its like 300 meters. I don't know how a grid based calculation could affect this, I just want to approximately know what are the areas with the major water flow, and the ones with less flow.

What does the Drainage Pattern exactly do?

Thanks!!!

Permalink Reply by Richard Schaffranek on June 12, 2013 at 2:14pm

It subdivides a surface into cells, and then calculates for each cell where the water will flow (steepest neighbour).