测试.png

 using System;
using System.Collections.Generic;namespace UnityEngine.UI.Extensions
{/// <summary>/// Curved text.让文本按照曲线进行显示 【注意对Image的变形 也是可以的】/// 说明： 对Text的操作就和 shadow 和 outline 组件类似。/// </summary>// [RequireComponent(typeof(Text), typeof(RectTransform))][AddComponentMenu("UI/Effects/Extensions/Curved Text")]public class CurvedText : BaseMeshEffect{// 曲线类型public AnimationCurve curveForText = AnimationCurve.Linear(0, 0, 1, 10);// 曲线程度public float curveMultiplier = 1;private RectTransform rectTrans;#if UNITY_EDITORprotected override void OnValidate(){base.OnValidate();if (curveForText[0].time != 0){var tmpRect = curveForText[0];tmpRect.time = 0;curveForText.MoveKey(0, tmpRect);}if (rectTrans == null)rectTrans = GetComponent<RectTransform>();if (curveForText[curveForText.length - 1].time != rectTrans.rect.width)OnRectTransformDimensionsChange();}
#endifprotected override void Awake(){base.Awake();rectTrans = GetComponent<RectTransform>();OnRectTransformDimensionsChange();}protected override void OnEnable(){base.OnEnable();rectTrans = GetComponent<RectTransform>();OnRectTransformDimensionsChange();}/// <summary>/// Modifies the mesh. 最重要的重载函数/// </summary>/// <param name="mesh">Mesh.</param>public override void ModifyMesh(VertexHelper vh){if (!IsActive())return;// 从mesh 得到 顶点集List<UIVertex> verts = new List<UIVertex>();vh.GetUIVertexStream(verts);// 顶点的 y值按曲线变换for (int index = 0; index < verts.Count; index++){var uiVertex = verts[index];//Debug.Log ();uiVertex.position.y += curveForText.Evaluate(rectTrans.rect.width * rectTrans.pivot.x + uiVertex.position.x) * curveMultiplier;verts[index] = uiVertex;}// 在合成meshvh.AddUIVertexTriangleStream(verts);}protected override void OnRectTransformDimensionsChange(){var tmpRect = curveForText[curveForText.length - 1];if (rectTrans != null){tmpRect.time = rectTrans.rect.width;curveForText.MoveKey(curveForText.length - 1, tmpRect);}}}
}