How to Limit grid movement?

Questions & Answers
1

Hello everyone,

Here’s where I’m at:
I’m new to coding, coming from a animation background. Went through a bunch of tutorials, but I’ve found the best way for me to learn is to do projects. I’ve made a few arcade prototypes which are fun and now decided to make a puzzle game, because it uses totally different mechanics.

The game requires grid movement, one unit at a time, x or y, but also wrapping so:

00 01 02 03    
10 11 12 13    
20 21 22 23    
30 31 32 33

In the 4x4 matrix if at point 03 you must be able to move into: 02, 13, 00, 33.

I have at the moment, the ability to select the GameObject which will be 1 of 4 GameObjects the player can manipulate on the grid, and can assign it a new position on the matrix, via click counting. 1st click assigns the GameObject you going to move, 2nd click sets it’s position to a clicked tile which corresponds to the matrix positions.

I thought of having each tile have a collision object on it, the GameObject then raycasts in the x and y directions, if it hits a tile those become available for moving into otherwise all tiles are unable to be occupied. ( not sure if this is a good solution or not )

So again my idea is : Assign tiles values for if they occupied or not by raycasting from the PlayerObject.
If a tile is unoccupied and is 1 unit away from the PlayerObject it becomes “available”.

How do I limit the selected GameObject to only 1 unit tiles away from it’s current position, whilst maintaining the wrapping?

Thanks in advance.

PS, if you going to suggest code I’m using UnityScript.

2

In the script for the tile you could just have some public GameObject variables like:
tileUp, tileDown, tileLeft, tileRight.

Then you could just drag the gameObjects into the script for each tile and check if they are occupied within the code. This is a bit of a pain to do all the dragging but it would work just fine.

3

That’s rad, will try this tonight when I get home.