ZhenShiXunYouJi2/Assets/Scripts/CIG3/ExtensionMethods/Extensions.cs

using System;
using UnityEngine;

namespace CIG3.ExtensionMethods
{
	public static class Extensions
	{
		public static void AttachChildTransform(this GameObject parent, GameObject child, SpriteAlignment alignment = SpriteAlignment.Custom)
		{
			child.transform.parent = parent.transform;
			Vector3 localPosition = new Vector3(0f, 0f, -0.0001f);
			SpriteRenderer component = parent.GetComponent<SpriteRenderer>();
			if (component != null)
			{
				if (alignment == SpriteAlignment.BottomRight || alignment == SpriteAlignment.RightCenter || alignment == SpriteAlignment.TopRight)
				{
					localPosition.x = 0.5f * (float)component.sprite.texture.width;
				}
				if (alignment == SpriteAlignment.BottomLeft || alignment == SpriteAlignment.LeftCenter || alignment == SpriteAlignment.TopLeft)
				{
					localPosition.x = -0.5f * (float)component.sprite.texture.width;
				}
				if (alignment == SpriteAlignment.TopRight || alignment == SpriteAlignment.TopCenter || alignment == SpriteAlignment.TopLeft)
				{
					localPosition.y = (float)component.sprite.texture.height;
				}
				if (alignment == SpriteAlignment.LeftCenter || alignment == SpriteAlignment.Center || alignment == SpriteAlignment.RightCenter)
				{
					localPosition.y = 0.5f * (float)component.sprite.texture.height;
				}
			}
			child.transform.localPosition = localPosition;
		}
	}
}