using UnityEngine;
using UnityEngine.UI;

/// A concrete subclass of the Unity UI `Graphic` class that just skips drawing.
/// Useful for providing a raycast target without actually drawing anything.
public class RaycastTarget : Graphic
{
    public override void SetMaterialDirty() { return; }
    public override void SetVerticesDirty() { return; }

    /// Probably not necessary since the chain of calls `Rebuild()`->`UpdateGeometry()`->`DoMeshGeneration()`->`OnPopulateMesh()` won't happen; so here really just as a fail-safe.
    protected override void OnPopulateMesh(VertexHelper vh)
    {
        vh.Clear();
        return;
    }
}