Unity3D实现渐变颜色效果

基于unity3D实现渐变颜色的简单脚本，代码很少，就不废话了，直接上代码和效果图。

效果图：

using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace ExtraFoundation.Components
{
[AddComponentMenu("UI/Effects/Gradient")]
public class UIGradient : BaseMeshEffect
{
#region Public Declarations
public enum Type
{
Vertical,
Horizontal
}
#endregion

#region Public Properties
public Type GradientType = Type.Vertical;
[Range(-1f, 1f)]
public float Offset = 0f;
public Gradient gradient;
#endregion

#region Public Methods
public override void ModifyMesh(VertexHelper helper)
{
if (!IsActive() || helper.currentVertCount == 0)
{
return;
}

vertexList.Clear();
helper.GetUIVertexStream(vertexList);

int nCount = vertexList.Count;
switch (GradientType)
{
case Type.Vertical:
 {
 float fBottomY = vertexList[0].position.y;
 float fTopY = vertexList[0].position.y;
 float fYPos = 0f;

for (int i = nCount - 1; i >= 1; --i)
 {
 fYPos = vertexList[i].position.y;
 if (fYPos > fTopY)
 fTopY = fYPos;
 else if (fYPos < fBottomY)
 fBottomY = fYPos;
 }

float fUIElementHeight = 1f / (fTopY - fBottomY);
 UIVertex v = new UIVertex();

for (int i = 0; i < helper.currentVertCount; i++)
 {
 helper.PopulateUIVertex(ref v, i);
 v.color = gradient.Evaluate((v.position.y - fBottomY) *
 fUIElementHeight - Offset);
 helper.SetUIVertex(v, i);
 }
 }
 break;
case Type.Horizontal:
 {
 float fLeftX = vertexList[0].position.x;
 float fRightX = vertexList[0].position.x;
 float fXPos = 0f;

for (int i = nCount - 1; i >= 1; --i)
 {
 fXPos = vertexList[i].position.x;
 if (fXPos > fRightX)
 fRightX = fXPos;
 else if (fXPos < fLeftX)
 fLeftX = fXPos;
 }

float fUIElementWidth = 1f / (fRightX - fLeftX);
 UIVertex v = new UIVertex();

for (int i = 0; i < helper.currentVertCount; i++)
 {
 helper.PopulateUIVertex(ref v, i);
 v.color = gradient.Evaluate((v.position.x - fLeftX) *
 fUIElementWidth - Offset);
 helper.SetUIVertex(v, i);
 }

}
 break;
default:
 break;
}
}
#endregion

#region Internal Fields
private List<UIVertex> vertexList = new List<UIVertex>();
#endregion
}
}

虽然支持的内容不多，但是小而精，希望对大家有用。

来源：https://blog.csdn.net/Cattleya_/article/details/80118419