TextureImporter and sprites

Unity Engine
1

Hello,
I would like to configure a sprite in multiple mode on runtime by this way:

 public void ConfigTexture()
    {
        TextureImporter importer = TextureImporter.GetAtPath("Assets/Resources/idle.png") as TextureImporter;
        importer.textureType = TextureImporterType.Advanced;
        importer.maxTextureSize = 2048;
        importer.textureFormat = TextureImporterFormat.AutomaticTruecolor;
        importer.isReadable = true;
        importer.filterMode = FilterMode.Bilinear;
        importer.npotScale = TextureImporterNPOTScale.None;
        importer.wrapMode = TextureWrapMode.Clamp;
        importer.mipmapEnabled = false;
        importer.spriteImportMode = SpriteImportMode.Multiple;

        UnityEngine.Object asset = AssetDatabase.LoadAssetAtPath(importer.assetPath, typeof(Texture2D));
        if (asset)
        {
            EditorUtility.SetDirty(asset);

        }
        else
        {
            importer.textureType = TextureImporterType.Advanced;
        }
    }

The problem is, the asset in Resource folder look like Texture2D not a multiple Sprite with left arrow who permit to see sprites. How can I configure an image to a sprite properly in runtime ?
Thank you.

2

I found it!
I added this :

AssetDatabase.ImportAsset(importer.assetPath, ImportAssetOptions.ForceUpdate);

complete code if anybody want to use it :

    public void ConfigTexture()
    {
        TextureImporter importer = TextureImporter.GetAtPath("Assets/Resources/idle.png") as TextureImporter;
        importer.textureType = TextureImporterType.Advanced;
        importer.maxTextureSize = 2048;
        importer.textureFormat = TextureImporterFormat.AutomaticTruecolor;
        importer.isReadable = true;
        importer.filterMode = FilterMode.Bilinear;
        importer.npotScale = TextureImporterNPOTScale.None;
        importer.wrapMode = TextureWrapMode.Clamp;
        importer.mipmapEnabled = false;
        importer.spriteImportMode = SpriteImportMode.Multiple;

        UnityEngine.Object asset = AssetDatabase.LoadAssetAtPath(importer.assetPath, typeof(Texture2D));
        AssetDatabase.ImportAsset(importer.assetPath, ImportAssetOptions.ForceUpdate);
        if (asset)
        {
            EditorUtility.SetDirty(asset);
            Debug.Log("dirty");
        }
        else
        {
            importer.textureType = TextureImporterType.Advanced;
            Debug.Log("not dirty");
        }
    }

See ya :slight_smile:

3

Hi I have an issue where the importer always comes back null even though the file is in the directory . Any suggestions?

Also can it only run in Unity Editor script? or at normal run time as well?

4

I figured out my issue. I was using the full path to my asset when the path should be relative to your project.