Array Weirdness?...

Unity Engine
1

Hi All,

I have created a Vector 2 and have a multdimensional array. I am then grabbing the x and y values of the Vector2 to perform a lookup in the Array. The problem is, it only half works and/or gives me an error. Can anyone see if I am doing something wrong or not doing something correct or is this some sort of issue?

Here is a rough example of what I am doing:

var grid = new Array();
grid.Push(new Array(1,1,1,1));
grid.Push(new Array(1,1,1,1));
grid.Push(new Array(1,1,1,1));

var tester = Vector2(2,2);
print (gridMap[tester.x][tester.y]);

There error I am getting is:

ArgumentException: parameters
Boo.Lang.RuntimeServices.GetSlice(System.Object target, System.String name, System.Object[ ] args) [0x00000]

The half works part is I can use either .x or .y to get the front part of the array but using both in combination gives me the error. In fact, I can even use the .x or .y and then use a number as the second accessor and it will work.

Thanks in advance for the help.

Regards,

– Clint

2

Vector2.x is of type float and not int. Floats can’t be used to index arrays.
Instead you can use use an int.

3

I understand that it shouldn’t work but it does for the first portion of it. For example:

var tester = Vector2(2,2);
print (gridMap[tester.x]);

That will return the proper item. So maybe this is something that should be checked when compiled?

Also, how do I do an inline float to integer conversion? In normal Javascript I could use parseInt, parseFloat and some others but those give me an error… I have tried Number, Integer, etc. and those all throw errors as well…

So as an example this is what I am doing when trying that conversion:

var tester = Vector2(2,2);
print (gridMap[Integer(tester.x)]);

or

print (gridMap[Number(tester.x)]);

or

print (gridMap[parseInt(tester.x)]);

Thanks!

– Clint

4

You can do conversion to int like this. We are going to add parseInt and parseFloat with the next release.

var grid = new Array(); 
grid.Push(new Array(1,1,1,1)); 
grid.Push(new Array(1,1,1,1)); 
grid.Push(new Array(1,1,1,1)); 

var tester = Vector2(2,2); 
function Start ()
{
	var testerXInt : int = tester.x;
	var testerYInt : int = tester.y;
	print (grid[testerXInt][testerYInt]); 
}
5

DOH! Okay, thanks. :wink:

Appreciate the help once again Joe!

– Clint