Grid centred from a point

Dear All,

I am beginner of GH and hopeing someone could help me.

I am trying to make a grid from a point. I know how to make a grid from a corner point. However, I want my grid from a center point rather than a corner.

Can anyone tell me how to do it?

Many thanks,

Eri

Replies to This Discussion

Permalink Reply by David Stasiuk on February 20, 2013 at 6:10am

If you build your grid from a corner, extract the center point from each of the grid cell polylines and average them, you'll have a center point for your grid from which you can create a translation vector to the desired location.

Permalink Reply by Hannes Löschke on February 20, 2013 at 7:40am

Move the origin of the Grid, not the cells. Less memory, less time.

Permalink Reply by David Stasiuk on February 20, 2013 at 7:57am

Do your math in one expression...less real estate ;)

Permalink Reply by Hannes Löschke on February 20, 2013 at 9:18am

Hmmm... interesting. Single component math executes about 40% faster than Evaluate.

We have to trade speed and memory for readability.

Permalink Reply by Luis Fraguada on February 20, 2013 at 8:15am

I am allergic to the rectangular / square grid components for some reason. Here is how I do it:

In A and B I have an expression: -A/2 or B/2. The slider defines the total dimension for the grid.

Or if you want to specify another point as the center:

Permalink Reply by Brian Muthaliff on June 20, 2017 at 7:41am

Hi Luis,

is it possible to run this same set up with two or more points. I think it has something to do with the grafted list for 'y', but adding multiple points messes it up.

I have also tried duplicating the ranges for the y input, but something is still a miss.

Essential, i hope to have four point generate the same centered grid.

Any and all help appreciated.

Regards

Permalink Reply by Hyungsoo Kim on June 20, 2017 at 8:24am

Hi.

You can use "Point Oriented" component along with "Cross Reference".

Permalink Reply by Brian Muthaliff on June 20, 2017 at 8:26am

Killer!

Thanks Hyungsoo Kim!

Permalink Reply by Laurent B on December 6, 2017 at 7:13am

I would like to generate an hexagonal grid from its center point (center of a cell) and have radius and number of cells in X and Y as parameters. So I could trim the grid and always have a cell right in the center. Cant find the best way to do it. Thanks