將NGUI UIAtlas的spriteList 轉成 UGUI可用的spritesheet SpriteMetaData

NGUIAtlasToStringConverter.cs

#if UNITY_EDITOR
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
#endif

public class NGUIAtlasToStringConverter {

#if UNITY_EDITOR
  [MenuItem("Tools/NGUI Atlas to Sprites Tool/Convert")]
  private static void Convert()
  {
    Debug.Log("Selected Object" + Selection.activeObject);

    GameObject AtlasObj = Selection.activeObject as GameObject;
    if (AtlasObj == null)
    {
      Debug.Log("Target is not a GameObject.");
      return;
    }

    UIAtlas AtlasComponent = AtlasObj.GetComponent<UIAtlas>();
    if (AtlasComponent == null)
    {
      Debug.Log("Target does not have UIAtlas.");
      return;
    }
    
    if(AtlasComponent.texture == null)
    {
      Debug.Log("Target's UIAtlas texture is null.");
      return;
    }
    
    string path = AssetDatabase.GetAssetPath(AtlasComponent.texture);
    Debug.Log("Texture Path: " + path);
    TextureImporter importer = (TextureImporter)TextureImporter.GetAtPath(path);

    List<SpriteMetaData> SpriteLists = new List<SpriteMetaData>();
    foreach (UISpriteData Data in AtlasComponent.spriteList)
    {
      PrintData(Data);

      SpriteMetaData SpriteData = new SpriteMetaData();
      SpriteData.name = Data.name;
      SpriteData.rect.x = Data.x;
      SpriteData.rect.y = AtlasComponent.texture.height - Data.y - Data.height; // y value reverse.
      SpriteData.rect.width = Data.width;
      SpriteData.rect.height = Data.height;
      SpriteData.pivot = new Vector2(0.5f, 0.5f);
      SpriteLists.Add(SpriteData);
    }

    importer.isReadable = true;
    importer.textureType = TextureImporterType.Sprite;
    importer.spriteImportMode = SpriteImportMode.Multiple;
    importer.spritesheet = SpriteLists.ToArray();
    importer.SaveAndReimport();

    Debug.Log("Success");
  }

  static void PrintData(UISpriteData Data)
  {
    Debug.Log(Data.name + "," + Data.x + "," + Data.y + "," + Data.width + "," + Data.height);
  }
#endif
  
}