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。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。