private static void OnPostprocessAllAssets(
string[] importedAssets,
string[] deletedAssets,
string[] movedAssets,
string[] movedFromAssetPaths)
{
foreach (string asset in importedAssets)
{
Texture2D tex = AssetDatabase.LoadAssetAtPath <Texture2D>(asset);
if (tex == null)
{
continue;
}
SpritesheetMetadata metadata = GetMetadata(asset);
if (metadata == null)
{
Debug.Log("No spritesheet metadata at postprocess");
return;
}
int previousStart = 0;
foreach (Animation anim in metadata.animations)
{
var binding = new EditorCurveBinding
{
type = typeof(SpriteRenderer),
path = "",
propertyName = "m_Sprite"
};
Object[] sprites = AssetDatabase.LoadAllAssetRepresentationsAtPath(asset);
int count = anim.end - previousStart;
var keys = new ObjectReferenceKeyframe[count];
for (int i = 0; i < count; i++)
{
if (sprites.Length == 0)
{
break;
}
keys[i] = new ObjectReferenceKeyframe
{
time = (float)i / metadata.frameRate,
value = sprites[i + previousStart],
};
}
var clip = new AnimationClip
{
frameRate = metadata.frameRate,
};
AnimationUtility.SetObjectReferenceCurve(clip, binding, keys);
DirectoryInfo parent = Directory.GetParent(asset);
string path = Path.Combine(parent.ToString(), string.Format("{0}.anim", anim.name));
AssetDatabase.CreateAsset(clip, path);
previousStart = anim.end;
}
}
}
private static SpritesheetMetadata GetMetadata(string path)
{
string metadataFilepath = Path.ChangeExtension(path, "bss");
string text = File.ReadAllText(metadataFilepath);
SpritesheetMetadata metadata = JsonUtility.FromJson <SpritesheetMetadata>(text);
return(metadata.Valid ? metadata : null);
}
private void OnPreprocessTexture()
{
SpritesheetMetadata metadata = GetMetadata(assetPath);
if (metadata == null)
{
Debug.Log("No spritesheet metadata at preprocess");
return;
}
var importer = assetImporter as TextureImporter;
Vector2Int size = importer.TextureSize();
int tilesX = size.x / metadata.tileWidth;
int tilesY = size.y / metadata.tileHeight;
int tileCount = tilesX * tilesY;
var tiles = new List <SpriteMetaData>();
int previousStart = 0;
foreach (Animation anim in metadata.animations)
{
for (int i = previousStart; i < anim.end; i++)
{
int x = i % tilesX;
int y = tilesY - i / tilesX - 1;
var dims = new Vector2(metadata.tileWidth, metadata.tileHeight);
var rect = new Rect(new Vector2(x, y) * dims, dims);
tiles.Add(new SpriteMetaData
{
name = string.Format("{0}{1}", anim.name, i - previousStart),
border = Vector4.zero,
alignment = (int)SpriteAlignment.Center,
pivot = Vector2.one / 2f,
rect = rect,
});
}
previousStart = anim.end;
}
importer.spriteImportMode = SpriteImportMode.Multiple;
importer.spritesheet = tiles.ToArray();
}