Gradient triangulation pattern on triangle surface

Hi,

I am a newbie on grasshopper and i would like to do the kind of pattern here attached, with adjustable gradient possibility.

I need to do this on a triangle surface with borders.

Can you help me please?

Thanks

Attachments:

4d42412567c8ed93787ce61dc1782c6a.jpg, 125 KB

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on May 25, 2016 at 6:15am

Always good to put source of the image
https://morfotactic.wordpress.com/tag/grasshopper/

https://morfotactic.wordpress.com/2012/09/22/the-algorythmically-ge...

The idea here is to rotate and scale triangles depending on a pixel brightness
The scale is depending on the angle of rotation. It could surely be translated in 3D.

Permalink Reply by karelovic on May 25, 2016 at 6:28am

You right ;)

But how can i do this in grasshopper?

Permalink Reply by Laurent DELRIEU on May 25, 2016 at 6:35am

What is for your a triangle surface, a mesh with triangles or a real triangle ?

What do you want attractor or greyscale image ?

Permalink Reply by Laurent DELRIEU on May 25, 2016 at 7:08am

Here a simple script with quad but it must work on triangles

I change image domain to -10 to 10 instead of 0 to 1, to fit domain of mesh. Play with the slider.

Attachments:

Closed polylines loft rotated.gh, 42 KB

Permalink Reply by karelovic on May 25, 2016 at 8:04am

You can see my 3d file here attached, the blue faces in render mode are the ones i want to use.

I prefer attractor but thanks for the one with greyscale image, it could be usefull too.

Attachments:

PRISME.3dm, 3.2 MB

Permalink Reply by Laurent DELRIEU on May 25, 2016 at 1:05pm

Here is a script which takes attractors but just one surface. I made triangles with subdivision on the triangle surface.

There are others ways to make attractor, a graph mapper could also be added to tune well the transitions, which are linear between max and min distances here.

Attachments: