Why does indexing of sprite-multiple object members begin with 1 instead of 0?

Unity Engine
1

I have this sprite sheet split in 20 cells in the Sprite Editor.
If I do

stripIcons = Resources.LoadAll(“spriteStrip”);
iconSprite = stripIcons[0];
print(iconSprite);

I get the “InvalidCastException: Cannot cast from source type to destination type.” error.

If I do instead

stripIcons = Resources.LoadAll(“spriteStrip”);
iconSprite = stripIcons[1];
print(iconSprite);

It prints out :

spriteStrip_0 (UnityEngine.Sprite)

and all is fine.

I can access all the members of the sprite sheet, from 1 to 20 instead of the 0-19 I would have expected.
What is it I don’t get about sprite-multiple objects indexing?

2 
function Start () {
    var stripIcons = Resources.LoadAll("SpriteStrip");
    var iconTexture = stripIcons[0];
    print(typeof(iconTexture));
    var iconSprite = stripIcons[1];
    print(typeof(iconSprite));
}

–Eric

3

Thanx.
So the first element in that object is a texture and the rest are sprites?!
Can you point me where in the doc I can have a look at this strange object?
I can’t figure at what point what becomes an array…

4

Yes, the first entry is the texture, the rest are sprites. You can’t have sprites without a texture. It’s not defined anywhere that the first entry is always the texture, though, so it might be best not to take that for granted.

–Eric

5

In order to disambiguate this, load the resources with a type:

stripIcons = Resources.LoadAll<Sprite>("spriteStrip");

iconSprite = stripIcons[0];