Voronoi project onto surface and connect?

I have created an image sampled surface that has come out as i want it.

the next step was to map my voronoi pattern onto the surface.

I extracted the intersection points and projected them onto the surface

(dont want to project voronoi edges as then they mould onto it and arent straight from point to point.

what it the best way to connect these points with a straight line? and why do i end up with 260 different points when there are clearly only about 60 or so?

Attachments:

Voronoi projection.PNG, 78 KB

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on June 12, 2016 at 10:04am

It is not easy to answer without script, there are many solutions.

You could use Point Deform, if you want to keep the closed polylines geometry.

You could explode voronoi, remove duplicate line, use begin and end point to project them on surface and make another line with the projected points ...

Permalink Reply by Léan Fouché on June 13, 2016 at 1:39am

ive run into different issues all together..

so to start from scratch this is what i need to do in sequence:

-Create 54 points within a boundary (will be voronoi centres)

-Use an image sampled surface where the lowest areas of the surface attract strongest (attraction tolerance will be key im assuming)

-Create voronoi diagram

-Extract line intersections of voronoi diagram

-connect them with line (between 2pt)

-project points onto surface (resulting in straight lines between projected points rather than lines moulded onto surface)

Attachments:

Voronoi Africa -Point cloud projection.3dm, 739 KB
Voronoi Africa -Point cloud projection.gh, 674 KB
20160613_092253.jpg, 2.6 MB

Permalink Reply by Léan Fouché on June 13, 2016 at 1:40am

Image sampler image

Attachments:

2000px-Africa-GDP c.jpg, 477 KB

Permalink Reply by Hyungsoo Kim on June 13, 2016 at 2:48am

Hi.

Is it what you are after?

Attachments:

VoronoiAfricaPointcloudprojection_re.gh, 50 KB

Permalink Reply by Léan Fouché on June 13, 2016 at 3:10am

Dear Hyung

It is now the second time that youve saved my butt and i cant express how much i appreciate it!

The only thing I now need to figure out is:

How to I plot the lowest points of the surface and use those as attractors for the original voronoi centre points.

I understand point attraction..but i need to find the CP from the surface down to the base plane and use those points right?

Attachments:

20160613_110508.jpg, 2.2 MB

Permalink Reply by Hyungsoo Kim on June 13, 2016 at 3:38am

As far as I know, It's difficult to specify only one point on a surface as lowest.

But you can get a decent approximation.

Attachments:

VoronoiAfricaPointcloudprojection_rev2.gh, 51 KB

Permalink Reply by Léan Fouché on June 13, 2016 at 4:53am

I made a few points with sliders on the most prominent dips which works perfectly thanks.

I have been trying to get the attraction to work but once again im in over my head. If you connect the Z-Axis component youll see them move into the negative domain vertically by a factor but im struggling to change the Z vector to a vector between the point cloud and Attractor..

any suggestions?

Attachments: