# Help Wanted checking cells on an infinite grid?

Discussion in 'Scripting' started by puddleglum, Oct 21, 2021.

1. ### puddleglum

Joined:
May 11, 2020
Posts:
213
i have a project with an infinite grid and cells on the grid can be alive or dead. if i have a living cell. how can i tell if cells that border it are alive or dead?

(im probobly really dumb and its super simple but i am really dumb)

2. ### Kurt-Dekker

Joined:
Mar 16, 2013
Posts:
20,041
However cells are addressed, modify that address to point to their neighbor cells and iterate those.

Joe-Censored and exiguous like this.
3. ### exiguous

Joined:
Nov 21, 2010
Posts:
1,616
When your grid is "infinite" how do you index the cells since numbers in computers can only represent a finite value?

As for your question: A grid is defined by coordinates. So you may need a method to query the cell at a given coodinate. So when you are at 5,2 and want the cell up from this you search for 5,3.

Edit: There was a quote from Einstein about infinity but I don't remember it .

Joe-Censored likes this.

Joined:
Mar 26, 2013
Posts:
11,718

5. ### puddleglum

Joined:
May 11, 2020
Posts:
213
when i say infinite grid i litteraly mean im using the coordinate/tile system unity gives you and need to tell if a tile is being ocupied

ok ill defenitly try that i guess my way of doing it(which is really clunky cause i suck at coding) would to just make every cell have colliders on each side and if they are being touched trigger somthing in the script

6. ### exiguous

Joined:
Nov 21, 2010
Posts:
1,616
Don't do that. If you use colliders/physics for such stuff your grid will be even smaller than now.
Here I have explained how I would do it in a similar usecase. When only a small part of the grid is visible to the player (and action happens only there so there is no simulation of the outer parts) I would even avoid using game objects for the whole grid but just have a data representation (non MB class) and when player moves the data around him is loaded and the tile representation is created from that.
So in general you need a manager class which has access (or stores) all your cell data. This one is responsible for getting you information about a certain cell to check if it is "occupied" (whatever that means).

The only way to get better is practicing . And maybe a bit of reading (forum, books, blogs).

unityunity