public override void OnImportAsset(AssetImportContext assetContext)
{
var asset = assetContext.assetPath;
var ctx = new ImportContext(asset, FindSettingsForAsset());
var images = AtlasGenerator.LoadImages(ctx.BaseName, ctx.AseFile);
if (images.Count == 0)
{
Debug.Log("No Images imported. Generating dummy object.");
return;
}
ImportSpriteSet(assetContext, ctx, images);
}
void ImportSpriteSet(AssetImportContext assetContext,
ImportContext ctx,
List <FrameImage> images)
{
// Stage 0: Create the texture atlas and define the sprites
var packResult = SpritePacker.Pack(ctx.Settings.Border, ctx.Settings.DenselyPacked, images);
var texture = AtlasGenerator.CreateTexture(packResult);
var metaList = AtlasGenerator.GenerateAtlasMetaData(ctx, packResult);
var preview = images.Count > 0 ? AtlasGenerator.CreateTexture(images[0]) : texture;
assetContext.AddObjectToAsset(ctx.BaseName, texture, preview);
assetContext.SetMainObject(texture);
var subImages = ctx.AseFile.SubImages.ToList();
foreach (var subImage in subImages)
{
var metaLayers = subImage.AllLayers.Where(layer => layer.Type == LayerType.Meta).ToList();
// State 1 - Post process the sprite definitions
var sprteContext = new SpriteProcessingContext(ctx, metaList);
foreach (var processor in SpritePostProcessors)
{
foreach (var layer in metaLayers.Where(l => l.ActionName == processor.ActionName))
{
processor.Process(sprteContext, layer);
}
}
}
// Stage 2: Actually generate the sprite instances. Generate generic animation templates ..
var sprites = GenerateSprites(metaList, ctx, texture);
var animImporter = new AnimationImporter(ChildPath);
var animations = animImporter.GenerateAnimClips(ctx, subImages, sprites);
// Stage 3: Post process the animations and add events etc.
foreach (var subImage in subImages)
{
var metaLayers = subImage.AllLayers.Where(layer => layer.Type == LayerType.Meta).ToList();
var metaContext = new MetaProcessingContext(ctx, animations, sprites);
foreach (var processor in MetaPostProcessors)
{
foreach (var layer in metaLayers.Where(l => l.ActionName == processor.ActionName))
{
processor.Process(metaContext, layer);
}
}
}
// Step 4: Add all generated sprites and animations to the import context.
foreach (var def in sprites)
{
var sprite = def.Sprite;
assetContext.AddObjectToAsset(sprite.name, sprite, AtlasGenerator.CreateTexture(def.Definition.Frame));
}
foreach (var anim in animations)
{
var clip = anim.Value;
var tag = anim.Key;
assetContext.AddObjectToAsset(tag.Name, clip);
}
}