MainAssetProcessor.cs

using AssetRipper.Assets;
using AssetRipper.Import.Logging;
using AssetRipper.SourceGenerated.Classes.ClassID_128;
using AssetRipper.SourceGenerated.Classes.ClassID_156;
using AssetRipper.SourceGenerated.Classes.ClassID_21;
using AssetRipper.SourceGenerated.Classes.ClassID_27;
using AssetRipper.SourceGenerated.Classes.ClassID_28;
using AssetRipper.SourceGenerated.Extensions;

namespace AssetRipper.Processing
{
	public class MainAssetProcessor : IAssetProcessor
	{
		public void Process(GameData gameData)
		{
			Logger.Info(LogCategory.Processing, "Main Asset Pairing");
			foreach (IUnityObjectBase asset in gameData.GameBundle.FetchAssets())
			{
				switch (asset)
				{
					case IFont font:
						{
							font.MainAsset = font;
							if (font.TryGetFontMaterial(out IMaterial? fontMaterial))
							{
								fontMaterial.MainAsset = font;
							}
							if (font.TryGetFontTexture(out ITexture? fontTexture))
							{
								fontTexture.MainAsset = font;
							}
						}
						break;
					case ITerrainData terrainData:
						{
							terrainData.MainAsset = terrainData;
							foreach (ITexture2D alphaTexture in terrainData.GetSplatAlphaTextures())
							{
								//Sometimes TerrainData can be duplicated, but retain the same alpha textures.
								//https://github.com/AssetRipper/AssetRipper/issues/1356
								alphaTexture.MainAsset ??= terrainData;
							}
						}
						break;
				}
			}
		}
	}
}