/****************************************************************************
 * Copyright (c) 2018.5 liangxie
 * 
 * http://qframework.io
 * https://github.com/liangxiegame/QFramework
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ****************************************************************************/

namespace QFramework
{
	using UnityEngine.UI;

	/// <inheritdoc />
	/// <summary>
	/// reference from :http://gad.qq.com/article/detail/37846
	/// 替换空 Image 扩大点击区域，降低 Drawcall。
	/// </summary>
	public class Empty4Raycast : MaskableGraphic
	{
		protected Empty4Raycast()
		{
			useLegacyMeshGeneration = false;
		}

		protected override void OnPopulateMesh(VertexHelper toFill)
		{
			toFill.Clear();
		}
	}
}