Feature: Flip horizontal/vertical #47

Assets/UIEffect/UIFlip.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.UIExtensions
+{
+
+	[RequireComponent(typeof(Graphic))]
+	[DisallowMultipleComponent]
+	public class UIFlip : BaseMeshEffect
+	{
+		//################################
+		// Serialize Members.
+		//################################
+		[SerializeField] private bool m_Horizontal = false;
+		[SerializeField] private bool m_Veritical = false;
+
+		//################################
+		// Public Members.
+		//################################
+		/// <summary>
+		/// Gets or sets a value indicating whether this <see cref="Coffee.UIExtensions.UIFlip"/> should be flipped horizontally.
+		/// </summary>
+		/// <value><c>true</c> if be flipped horizontally; otherwise, <c>false</c>.</value>
+		public bool horizontal { get { return this.m_Horizontal; } set { this.m_Horizontal = value; } }
+
+		/// <summary>
+		/// Gets or sets a value indicating whether this <see cref="Coffee.UIExtensions.UIFlip"/> should be flipped vertically.
+		/// </summary>
+		/// <value><c>true</c> if be flipped horizontally; otherwise, <c>false</c>.</value>
+		public bool vertical { get { return this.m_Veritical; } set { this.m_Veritical = value; } }
+
+		/// <summary>
+		/// Call used to modify mesh.
+		/// </summary>
+		/// <param name="vh">VertexHelper.</param>
+		public override void ModifyMesh(VertexHelper vh)
+		{
+			RectTransform rt = graphic.rectTransform;
+			UIVertex vt = default(UIVertex);
+			Vector3 pos;
+			Vector2 center = rt.rect.center;
+			for (int i = 0; i < vh.currentVertCount; i++)
+			{
+				vh.PopulateUIVertex(ref vt, i);
+				pos = vt.position;
+				vt.position = new Vector3(
+					m_Horizontal ? -pos.x : pos.x,
+					m_Veritical ? -pos.y : pos.y
+//					m_Horizontal ? (pos.x + (center.x - pos.x) * 2) : pos.x,
+//					m_Veritical ? (pos.y + (center.y - pos.y) * 2) : pos.y
+				);
+				vh.SetUIVertex(vt, i);
+			}
+		}
+	}
+}