using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// 用于不做渲染的UI对象，仅保留射线检测
/// </summary>
[RequireComponent(typeof(CanvasRenderer))]
public class NonDrawingGraphic : Graphic
{
    protected override void Awake()
    {
        color = new Color(0, 0, 0, 0);
    }
    protected override void OnPopulateMesh(VertexHelper vh)
    {
        vh.Clear();
    }

    // 如果不需要渲染，可以直接覆盖 SetMaterialDirty 和 SetVerticesDirty 方法来防止不必要的重绘调用
    public override void SetMaterialDirty() { }
    public override void SetVerticesDirty() { }
}