miduo_client/Assets/Scripts/UI/FontGradient.cs

56 lines
1.5 KiB
C#

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;
using System;
/// <summary>
/// 渐变字体
/// </summary>
[AddComponentMenu("UI/Effects/Gradient")]
public class FontGradient : BaseMeshEffect
{
public Color32 topColor = Color.white;
public Color32 bottomColor = Color.black;
public bool useGraphicAlpha = true;
public override void ModifyMesh(VertexHelper vh)
{
if (!IsActive())
{
return;
}
var count = vh.currentVertCount;
if (count==0)
{
return;
}
var vertexs = new List<UIVertex>();
for (int i = 0; i < count; i++)
{
var vertex = new UIVertex();
vh.PopulateUIVertex(ref vertex, i);
vertexs.Add(vertex);
}
var topY = vertexs[0].position.y;
var bottomY = vertexs[0].position.y;
for (int i = 0; i < count; i++)
{
var y = vertexs[i].position.y;
if (y > topY)
{
topY = y;
}
else if (y < bottomY)
{
bottomY = y;
}
}
var height = topY - bottomY;
for (var i = 0; i < count; i++)
{
var vertex = vertexs[i];
var color = Color32.Lerp(bottomColor, topColor, (vertex.position.y - bottomY) / height);
vertex.color = color;
vh.SetUIVertex(vertex, i);
}
}
}