Best way to determine if there is a gameobject in multiple locations?

Question

Hi all. How do I determine if there are no gameobjects in set locations?

I'm making a 2d tile based game and I want to check if there are any gameobjects in a set coordinate. I have no problems checking if there are any gameobjects in a location. I just ran a foreach for every gameobject with certain tags and do actions if they are in certain tiles. However, I don't know what to do for empty tiles.

I'm planning to make an empty gameobject with a collider then iterate it through the locations and check if there are any trigger/collision to other gameobjects. Should I got through this method or are there any simpler way to do this? Thank you in advance.

Answer 1

Best Answer

Answer by Andres-Fernandez · Jul 07, 2014 at 12:10 PM

Well, I can think of a couple of solutions.

First and easiest: just have a logical representation of your map. Being a 2d array, text file, whatever you want. Make your objects update your logical map whenever they move/change position and then you only need to check your logical map at the desired position.

Second: Create an array of tile positions on top of the tiles and send raycasts from each tile position to the tile. If collides with any object, then the tile is occupied. Else, it's free.

Add comment · Show 4 · Share

lukas_balaz · Jul 07, 2014 at 02:05 PM 0

Share

I think your first solution isnt the easiest, but it is the best certainly. Sending raycast, creating empty objects or even triggers is not good.

Andres-Fernandez · Jul 08, 2014 at 06:44 AM 0

Share

Well, first one seems the easiest to me. I would go for the 2D array (tile based games are perfect for that kind of logical representation).

For the second one you don't need to create anything, just have a Vector3 array to send the raycasts from and one layer to check for the characters. No triggers or anything. If your characters have colliders on, just send the raycast. Although it would cost a lot of time, that's for sure.

dodi · Jul 08, 2014 at 02:18 PM 1

Share

Thanks. I did the first one

lukas_balaz · Jul 08, 2014 at 08:32 PM 0

Share

yes, the first one is most effective, so it is the best for me. But you need to change the array every time when anything moves, so you can do some bugs easily. That is why I dont think it is most easy (something is easy for me if it is easy to code, but I like doing things effective)

Best way to determine if there is a gameobject in multiple locations?

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions