mmorpg2d/Assets/HeroEditor4D/Common/Scripts/Editor/FirearmMuzzleResolver.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using Assets.HeroEditor4D.Common.Scripts.Data;
using UnityEngine;

namespace Assets.HeroEditor4D.Common.Scripts.Editor
{
    public static class FirearmMuzzleResolver
    {
        private static Texture2D _texture;

        public static void Resolve(ItemSprite sprite)
        {
            sprite.MetaDict = new Dictionary<string, string> { { "Muzzle", ResolveMuzzle(sprite.Path).ToString() } };
        }

        public static int ResolveMuzzle(string path)
        {
            path = Path.Combine(Environment.CurrentDirectory, path);

            _texture ??= new Texture2D(2, 2);

            if (File.Exists(path))
            {
                var bytes = File.ReadAllBytes(path);

                _texture.LoadImage(bytes);

                var pixels = _texture.GetPixels32();
                var x = _texture.width / 2;
                var height = _texture.height - 64;

                for (var y = height - 1; y >= 0; y--)
                {
                    if (pixels[x + y * _texture.width].a > 0)
                    {
                        return 100 * y / height;
                    }
                }
            }

            return 0;
        }
    }
}