Mapping of Image sampler points

Hi all,

I extracted these points from an image using an image sampler, (The points are the RGB values from the base image) and now I want to map them on breps(cylinders) which populate a sphere.

They are getting incorrectly mapped & I want to map them spherically just the way we texture map using a bounding sphere.

Has anyone worked on a similar problem?

Please see some screenshots below and my script attached.

Attachments:

grasshopper 3d.3dm, 2.1 MB
Canst script 2.gh, 686 KB

Replies to This Discussion

Permalink Reply by Hyungsoo Kim on June 20, 2017 at 2:16pm

Hi.

Check this, BTW, you'll have to solve the "Sphere Seam" problem because your image is not a good case for seamless connection fr left to right.

Attachments:

Canstscript2_re.gh, 19 KB

Permalink Reply by Sameeha Joshi on June 20, 2017 at 4:45pm

Thank you for your reply Hyungsoo :)
I am a beginner at grasshopper and not sure if I am missing something, but I am getting all breps as blue when i open your GH file. I understand about the "sphere seam" problem and I'll work on the image itself!

Permalink Reply by Laurent DELRIEU on June 20, 2017 at 2:21pm

I don't know if I undestood correctly but here I use project point on surface to get UV coordinate. I reparametrize surface of the sphere in order to have UV domain in {0 to 1}. I did the same with the image sampler. Domain was {0 to 8}.

If you want to rotate the texture, rotate the sphere.

Attachments: