InstantAssetTable.Subtract

Parameters

Description

Removes all asset entries and their metadata that exist in another InstantAssetTable from this table.

This operation effectively filters out assets that are present in the source table, leaving only unique entries. Useful for creating differential asset tables or removing specific assets.

using UnityEngine;
using System.IO;

public class SubtractExample : MonoBehaviour
{
    public InstantAssetTable fullTable;
    public string baseTablePath = "Assets/StreamingAssets/base_assets";
    
    void Start()
    {
        // Load the base asset table
        InstantAssetTable baseTable = InstantAsset.ReadAssetTable(baseTablePath) as InstantAssetTable;
        
        if (baseTable != null)
        {
            // Get initial count
            int initialCount = fullTable.GetAllAssetsPath().Length;
            
            // Subtract base table from full table (removes common assets)
            fullTable.Subtract(baseTable);
            
            int finalCount = fullTable.GetAllAssetsPath().Length;
            
            Debug.Log($"Subtracted {initialCount - finalCount} common assets");
            Debug.Log($"Remaining unique assets: {finalCount}");
            
            // Clean up
            InstantAsset.UnloadAssetTable(baseTable);
        }
        else
        {
            Debug.LogError("Failed to load base asset table");
        }
    }
}