测试.png
using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;
[AddComponentMenu("UI/Effects/MirrorText")]
public class MirrorText : BaseMeshEffect
{
//距离，限制范围0-30
[Range(0, 30)]
public float distance;
public override void ModifyMesh(VertexHelper vh)
{
if (!IsActive() || vh.currentVertCount == 0)
{
return;
}
List<UIVertex> vertexs = new List<UIVertex>();
vh.GetUIVertexStream(vertexs);
UIVertex vt;
int count = vertexs.Count;
float miny = vertexs[0].position.y;
float maxy = vertexs[0].position.y;
for (int i = 1; i < count; i++)
{
if (vertexs[i].position.y < miny)
{
miny = vertexs[i].position.y;
}
else if (vertexs[i].position.y > maxy)
{
maxy = vertexs[i].position.y;
}
}
float uiElementHeight = maxy - miny;
float mirrorMinY = -maxy + 2 * miny - distance;
Color32 top = GetComponent<Text>().color;
Color32 bottom = new Color(top.r, top.g, top.b, 0);
for (int i = 0; i < count; i++)
{
vt = vertexs[i];
vertexs.Add(vt);
Vector3 v = vt.position;
v.y = -v.y + 2 * miny - distance;
vt.position = v;
//透明度效果
vt.color = Color32.Lerp(bottom, top, (vt.position.y - mirrorMinY) / uiElementHeight);
vertexs[i + count] = vt;
}
vh.Clear();
vh.AddUIVertexTriangleStream(vertexs);
}
}
