Image Sampling with point grid in xz plane

Hello! I've recently started experimenting with the image sampler... I'm trying to select certain points using a pattern-image (so I can then create a 3d grid out of them). I've managed to do it in xy plane but i'm having trouble figuring out how to convert the xz points to uv coordinates to match my image sampler.

I've used circles and colors to visualize the pattern. The first image is what i need and the second is what i get!

any thoughts????

Attachments:

pattern mapping xz.gh, 1.4 MB

Replies to This Discussion

Permalink Reply by Gediminas Kirdeikis on May 7, 2017 at 12:15pm

-The image sampler needs 2 coordinate numbers to sample pixel information from a bitmap.

-Point generates 3 numbers (X,Y,Z)

-Image sampler takes first two numbers and ignores the third one, so it reads X,Y. Since your point grid is in XZ plane, Y always returns as 0.

- Simply extract XZ coordinates of each point and feed those in to the image sampler.

Attachments:

patternmappingxz.gh, 664 KB

Permalink Reply by Anastasia Livanou on May 8, 2017 at 3:50am

After searching, i figured that this was my problem, i just didn't know how to "simply" extract the coordinates i needed! Thank you!!!

Permalink Reply by Hyungsoo Kim on May 7, 2017 at 12:50pm

Check this as well.

You are better off resetting your image sampler's domain range to always 0 to 1 so that you can change the size of point grid whatever you want by remapping your point coordinates 0 to 1 on XY plane.

Attachments:

patternmappingxz_re.gh, 26 KB

Permalink Reply by Anastasia Livanou on May 8, 2017 at 3:52am

That's actually really helpfull since i need to apply the def to a number of images of different resolution! And it works perfectly! Thank you for the twist!

(p.s. i love your white grouping color!)

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