Loading a Sprite (Unity 4.3) in resource folder and setting it in sprite renderer

Archived Forums Questions & Answers
1

Hey Guys,

I have a SpriteSheet which I imported in Unity so I have a basic Texture2D asset which is separated in multiple sprites which are named like (sprite_0,sprite_1, etc.) Im trying to set the sprite of my SpriteRenderer in code but I want to be able to load a sprite dynamically, not have to link it in the script directly. So I have a Resources and a Textures folder within it. I’ trying to get the sprite by doing Sprite s = Resources.Load(“Textures/sprite_0”) as Sprite. But it is always null. In fact, when I want to load the “Base” sprite named “Sprite”, it recognize it as a Texture2D type, but when I want to load a specific sprite in my texture like sprite_0, it just can’t find it at all. I have my texture type set to Sprite, and Mode to multiple. Does anybody have an idea ?. Thanks a lot for your time :slight_smile:

Claude

5 Answers

5
2

Sprite sprites = Resources.LoadAll(“Textures”);

How then to get the desired sprite by name?

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Only by index, I suppose. It's not a problem, because name looks like "textureName_spriteIndex".

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Unfortunately in my case, the names do not contain index. I did so: Sprite[] textures = Resources.LoadAll<Sprite>("Textures"); string[] names = new string[textures.Length]; for(int ii=0; ii< names.Length; ii++) { names[ii] = textures[ii].name; } Sprite sprite = textures[Array.IndexOf(names, "textureName")]; But maybe there's a more elegant way?

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Worked like a charm ! Thanks a lot everybody for your time :)

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@Siflou: Hi, could you post the final code, so we could see how did you solve it, because it's not working for me.. thanks.

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3

For multi-sprite textures I found this to work:

UnityEngine.Object allSprites = AssetDatabase.LoadAllAssetRepresentationsAtPath(“Assets/Textures/” + SpriteTextureName + TextureExtension);

This is pretty great! Saves you the trouble of putting stuff in a Resources folder, too! (I'm neurotic, and feel sooooo much better if I can keep my folders labeled by type)

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So, bad news, actually -- this only works in the Editor. Turns out AssetDatabase is name-spaced to UnityEditor, and so if you include this elsewhere in your code it won't build.

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Correct. The implication was that you use custom editor code to hook up the references ahead of time.

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4

You can also define sprites in advance.

public Sprite[] sprites;

Then you can bind sprites in Unity Editor, and set SpriteRenderer.sprite in runtime like this.

SpriteRenderer sr = GetComponent<SpriteRenderer>();
sr.sprite = this.sprites[Random.Range(0, this.sprites.GetLength(0) - 1)];

For some situation this is enough.

I hope this can help.

Regards.

5

You can use System.Linq to find easily sprite into texture :wink:

For example:

private Sprite GetLevelSprite(string textureName)
        {
            Sprite[] textures = Resources.LoadAll<Sprite>("MySpriteSheet");
            return textures.Where(t => t.name == textureName).First<Sprite>();       
        }

GetLevelSprite("plop") will return the sprite with /Assets/Resources/MySpriteSheet/plop path :wink:

6

Resources.Load are searching in the directory “Assets/Resources”
That’s why you need to do

_sprites = Resources.LoadAll<Sprite>(spritesPath);

or

_sprites = Resources.Load<Sprite>(spritesPath);

with spritesPath as relative path.
If you need to load all from folder “Assets/Resources/Sprites”, you need to write only “Sprites”.

after this you can just do the following:

var sprite = sprites[0];

or

var sprite = _sprites.Where(a => a.name == "Sprite_Name_Needed").First();