C# 简单的颜色渐变算法

今天要用到一个颜色渐变的算法，网上看了很多，觉得都太繁琐，索性自己写一个。话不多说，直接上代码！

**这是用来获取某一颜色段的分度集合** /// <summary> /// 获得某一颜色区间的颜色集合 /// </summary> /// <param name="sourceColor">起始颜色</param> /// <param name="destColor">终止颜色</param> /// <param name="count">分度数</param> /// <returns>返回颜色集合</returns> public static List<Color> GetSingleColorList(Color srcColor, Color desColor, int count) { List<Color> colorFactorList = new List<Color>(); int redSpan = desColor.R - srcColor.R; int greenSpan = desColor.G - srcColor.G; int blueSpan = desColor.B - srcColor.B; for (int i = 0; i < count; i++) { Color color = Color.FromArgb( srcColor.R + (int)((double)i / count * redSpan), srcColor.G + (int)((double)i / count * greenSpan), srcColor.B + (int)((double)i / count * blueSpan) ); colorFactorList.Add(color); } return colorFactorList; } **这里就是将红到紫之间的颜色分为5个区间，利用上面的算法拼接5个区间的分度值，就得到全彩颜色集合** /// <summary> /// 获取从红到紫的颜色段的颜色集合 /// </summary> /// <param name="totalCount">分度数</param> /// <param name="redToPurple">是否从红到紫色渐变</param> /// <returns>返回颜色集合</returns> public static List<Color> GetFullColorList(int totalCount, bool redToPurple = true) { List<Color> colorList = new List<Color>(); if (totalCount > 0) { if (redToPurple) { colorList.AddRange(GetSingleColorList(Color.Red, Color.Yellow, totalCount / 5 + (totalCount % 5 > 0 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Yellow, Color.Lime, totalCount / 5 + (totalCount % 5 > 1 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Lime, Color.Cyan, totalCount / 5 + (totalCount % 5 > 2 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Cyan, Color.Blue, totalCount / 5 + (totalCount % 5 > 3 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Blue, Color.Magenta, totalCount / 5 + (totalCount % 5 > 4 ? 1 : 0))); } else { colorList.AddRange(GetSingleColorList(Color.Magenta, Color.Blue, totalCount / 5 + (totalCount % 5 > 0 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Blue, Color.Cyan, totalCount / 5 + (totalCount % 5 > 1 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Cyan, Color.Lime, totalCount / 5 + (totalCount % 5 > 2 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Lime, Color.Yellow, totalCount / 5 + (totalCount % 5 > 3 ? 1 : 0))); colorList.AddRange(GetSingleColorList(Color.Yellow, Color.Red, totalCount / 5 + (totalCount % 5 > 4 ? 1 : 0))); } } return colorList; }