SpriteAtlasScriptIF.cs

	public static class SpriteAtlasScriptIF
	{
		//SpriteAtlasアセットを新規作成して、作成したアセットのパスを返す
		public static string CreateSpriteAtlas(string path, string[] folders, string subDir, FilterMode filterMode, bool enableTightPackage)
		{
			var insertLines = new List<string>();

			foreach (var dir in folders)
			{
				var guid = AssetDatabase.AssetPathToGUID(dir);
				insertLines.Add(string.Format(SpriteAtlasAssetPackableLineTemplate, guid));
			}

			var contents = SpriteAtlasAssetContentsTemplate.Trim();
			contents = contents.Replace("###name###", System.IO.Path.GetFileNameWithoutExtension(path));
			contents = contents.Replace("###packables###", string.Join("\n", insertLines));
			contents = contents.Replace("###filterMode###", ((int)filterMode).ToString());
			contents = contents.Replace("###enableTightPacking###", enableTightPackage ? "1" : "0");

			System.IO.Directory.CreateDirectory(System.IO.Path.GetDirectoryName(path));
			System.IO.File.WriteAllText(path, contents);
			AssetDatabase.ImportAsset(path);

			return path;
		}

		public static void ModifyFilterMode(string atlasPath, FilterMode mode)
		{
			var asset = AssetDatabase.LoadAssetAtPath<UnityEngine.U2D.SpriteAtlas>(atlasPath);
			Debug.Log(atlasPath);
			var so = new SerializedObject(asset);
			var p = so.FindProperty("m_EditorData");
			p = p.FindPropertyRelative("textureSettings");
			p.FindPropertyRelative("filterMode").intValue = (int)mode;
			so.ApplyModifiedProperties();
		}

		public static void ModifyEnableTightPacking(string atlasPath, bool tightPacking)
		{
			var asset = AssetDatabase.LoadAssetAtPath<UnityEngine.U2D.SpriteAtlas>(atlasPath);
			var so = new SerializedObject(asset);
			var p = so.FindProperty("m_EditorData");
			p = p.FindPropertyRelative("packingParameters");
			p.FindPropertyRelative("enableTightPacking").boolValue = tightPacking;
			so.ApplyModifiedProperties();
		}

		const string SpriteAtlasAssetPackableLineTemplate = "    - {{fileID: 102900000, guid: {0}, type: 3}}";
		const string SpriteAtlasAssetContentsTemplate = @"%YAML 1.1
%TAG !u! tag:unity3d.com,2011:
--- !u!687078895 &4343727234628468602
SpriteAtlas:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_Name: ###name###
  m_EditorData:
    textureSettings:
      anisoLevel: 1
      compressionQuality: 50
      maxTextureSize: 2048
      textureCompression: 0
      colorSpace: 1
      filterMode: ###filterMode###
      generateMipMaps: 0
      readable: 0
      crunchedCompression: 0
    platformSettings: []
    packingParameters:
      paddingPower: 2
      blockOffset: 1
      allowAlphaSplitting: 0
      enableRotation: 1
      enableTightPacking: ###enableTightPacking###
    packedHash:
      serializedVersion: 2
      Hash: 00000000000000000000000000000000
    variantMultiplier: 1
    bindAsDefault: 1
    finalFormat: -1
    hashString: 
    totalSpriteSurfaceArea: 0
    packables:
###packables###
    packedSpriteRenderDataKeys: []
  m_MasterAtlas: {fileID: 0}
  m_PackedSprites: []
  m_PackedSpriteNamesToIndex: []
  m_Tag: New Sprite Atlas
  m_IsVariant: 0
";

	}
}