How to make every fifth line in a geometry nodes grid a different color?

[Daz_Harris]

Hi folks,

I’m trying to hack together my own grid that i can place in front of my camera lens, so that i have a customizable grid in camera view.

My question is, how does one make every fifth line (in both x & y) a different color?

I also need it to remain every fifth, even if i change the number of x & y grid divisions!

Here’s my blend file attached.

Thanks, hopefully, in advance!

grid question.blend (958.9 KB)

[AlphaChannel]

Have you tried using modulo on the index to separate yr geonode streams?

Hope that helps

[Daz_Harris]

Thanks, but i don’t understand how to apply this to my grid.

I haven’t done much with geonodes in the last year so i’m feeling like a bit of a noob again!

[AlphaChannel]

GRIDLINES.zip (122.2 KB)

Have a look at this.

Hope that helps

[zeroskilz]

Yes, modulo math is your friend.

[Daz_Harris]

Thanks a lot, that works great!

Could i ask you how to do one tweak on it?:

As it stands, you can increment “count” by an integer to increase grid resolution.

But i’d like it to actually increment like this:

“new” count setting 1 = “old” count setting 6
2 = 11
3= 21
4= 41
5= 81
etc

So, basically, each time you increment “count” it subdivides the grid.

How do you do that?

[AlphaChannel]

use maprange node and or some maths nodes…I dont see a logical pattern there.

[AlphaChannel]

Oh, power of 2 plus 1?

[Daz_Harris]

Yes! I think i worked it out!

[Daz_Harris]

Thanks for that! Unfortunately my GN knowledge isn’t good enough for me to understand what you’re doing there!

[zeroskilz]

Its not GN… it’s just math.

For a grid with dimensions X*Y, the face index will be some multiple of (Y-1) at the start of every row.

So, floor(FaceIndex/(Y-1)) gives you the row index of every face…

Form there it is just a case of modding the row index.

Similar logic goes for columns: