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qanholas 2010-11-24
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看不明白,给定一颜色值 蓝色 ，我想要淡蓝的 颜色值
最好给一个方法调用
最好给一个方法调用
sunzhi523 2010-11-24
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以后多多交流 哦。。。
兔子-顾问 2010-11-24
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贴到帖子里吧。担心未来某天有人搜索到帖子，。那鬼佬帖子又失效了。多失望。
/* This tool is part of the xRay Toolkit and is provided free of charge by Bob Powell.
* This code is not guaranteed to be free from defects or fit for merchantability in any way.
* By using this tool in your own programs you agree to hold Robert W. Powell free from all
* damages direct or incidental that arise from such use.
* You may use this code free of charge in your own projects on condition that you place the
* following paragraph (enclosed in quotes below) in your applications help or about dialog.
* "Portions of this code provided by Bob Powell. http://www.bobpowell.net"
*/
using System;
using System.Drawing;
namespace xRay.Toolkit.Utilities
{
public class RGBHSL
{
public class HSL
{
public HSL()
{
_h=0;
_s=0;
_l=0;
}
double _h;
double _s;
double _l;
public double H
{
get{return _h;}
set
{
_h=value;
_h=_h>1 ? 1 : _h<0 ? 0 : _h;
}
}
public double S
{
get{return _s;}
set
{
_s=value;
_s=_s>1 ? 1 : _s<0 ? 0 : _s;
}
}
public double L
{
get{return _l;}
set
{
_l=value;
_l=_l>1 ? 1 : _l<0 ? 0 : _l;
}
}
}
public RGBHSL()
{
}
/// <summary>
/// Sets the absolute brightness of a colour
/// </summary>
/// <param name="c">Original colour</param>
/// <param name="brightness">The luminance level to impose</param>
/// <returns>an adjusted colour</returns>
public static Color SetBrightness(Color c, double brightness)
{
HSL hsl = RGB_to_HSL(c);
hsl.L=brightness;
return HSL_to_RGB(hsl);
}
/// <summary>
/// Modifies an existing brightness level
/// </summary>
/// <remarks>
/// To reduce brightness use a number smaller than 1. To increase brightness use a number larger tnan 1
/// </remarks>
/// <param name="c">The original colour</param>
/// <param name="brightness">The luminance delta</param>
/// <returns>An adjusted colour</returns>
public static Color ModifyBrightness(Color c, double brightness)
{
HSL hsl = RGB_to_HSL(c);
hsl.L*=brightness;
return HSL_to_RGB(hsl);
}
/// <summary>
/// Sets the absolute saturation level
/// </summary>
/// <remarks>Accepted values 0-1</remarks>
/// <param name="c">An original colour</param>
/// <param name="Saturation">The saturation value to impose</param>
/// <returns>An adjusted colour</returns>
public static Color SetSaturation(Color c, double Saturation)
{
HSL hsl = RGB_to_HSL(c);
hsl.S=Saturation;
return HSL_to_RGB(hsl);
}
/// <summary>
/// Modifies an existing Saturation level
/// </summary>
/// <remarks>
/// To reduce Saturation use a number smaller than 1. To increase Saturation use a number larger tnan 1
/// </remarks>
/// <param name="c">The original colour</param>
/// <param name="Saturation">The saturation delta</param>
/// <returns>An adjusted colour</returns>
public static Color ModifySaturation(Color c, double Saturation)
{
HSL hsl = RGB_to_HSL(c);
hsl.S*=Saturation;
return HSL_to_RGB(hsl);
}
/// <summary>
/// Sets the absolute Hue level
/// </summary>
/// <remarks>Accepted values 0-1</remarks>
/// <param name="c">An original colour</param>
/// <param name="Hue">The Hue value to impose</param>
/// <returns>An adjusted colour</returns>
public static Color SetHue(Color c, double Hue)
{
HSL hsl = RGB_to_HSL(c);
hsl.H=Hue;
return HSL_to_RGB(hsl);
}
/// <summary>
/// Modifies an existing Hue level
/// </summary>
/// <remarks>
/// To reduce Hue use a number smaller than 1. To increase Hue use a number larger tnan 1
/// </remarks>
/// <param name="c">The original colour</param>
/// <param name="Hue">The Hue delta</param>
/// <returns>An adjusted colour</returns>
public static Color ModifyHue(Color c, double Hue)
{
HSL hsl = RGB_to_HSL(c);
hsl.H*=Hue;
return HSL_to_RGB(hsl);
}
/// <summary>
/// Converts a colour from HSL to RGB
/// </summary>
/// <remarks>Adapted from the algoritm in Foley and Van-Dam</remarks>
/// <param name="hsl">The HSL value</param>
/// <returns>A Color structure containing the equivalent RGB values</returns>
public static Color HSL_to_RGB(HSL hsl)
{
double r=0,g=0,b=0;
double temp1,temp2;
if(hsl.L==0)
{
r=g=b=0;
}
else
{
if(hsl.S==0)
{
r=g=b=hsl.L;
}
else
{
temp2 = ((hsl.L<=0.5) ? hsl.L*(1.0+hsl.S) : hsl.L+hsl.S-(hsl.L*hsl.S));
temp1 = 2.0*hsl.L-temp2;
double[] t3=new double[]{hsl.H+1.0/3.0,hsl.H,hsl.H-1.0/3.0};
double[] clr=new double[]{0,0,0};
for(int i=0;i<3;i++)
{
if(t3[i]<0)
t3[i]+=1.0;
if(t3[i]>1)
t3[i]-=1.0;
if(6.0*t3[i] < 1.0)
clr[i]=temp1+(temp2-temp1)*t3[i]*6.0;
else if(2.0*t3[i] < 1.0)
clr[i]=temp2;
else if(3.0*t3[i] < 2.0)
clr[i]=(temp1+(temp2-temp1)*((2.0/3.0)-t3[i])*6.0);
else
clr[i]=temp1;
}
r=clr[0];
g=clr[1];
b=clr[2];
}
}
return Color.FromArgb((int)(255*r),(int)(255*g),(int)(255*b));
}
//
/// <summary>
/// Converts RGB to HSL
/// </summary>
/// <remarks>Takes advantage of whats already built in to .NET by using the Color.GetHue, Color.GetSaturation and Color.GetBrightness methods</remarks>
/// <param name="c">A Color to convert</param>
/// <returns>An HSL value</returns>
public static HSL RGB_to_HSL (Color c)
{
HSL hsl = new HSL();
hsl.H=c.GetHue()/360.0; // we store hue as 0-1 as opposed to 0-360
hsl.L=c.GetBrightness();
hsl.S=c.GetSaturation();
return hsl;
}
}
}
bu88dong 2010-11-24
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颜色还可以这样哦、学习下。
兔子-顾问 2010-11-24
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连接有点问题，google翻译的
原文
http://www.bobpowell.net/rgbhsb.htm
原文
http://www.bobpowell.net/rgbhsb.htm
兔子-顾问 2010-11-24
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兔子-顾问 2010-11-24
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浓度…
饱和度
搜索一下c# RGB HSB 转换
例如
http://soaspx.com/dotnet/csharp/csharp_20101014_5963.html
饱和度
搜索一下c# RGB HSB 转换
例如
http://soaspx.com/dotnet/csharp/csharp_20101014_5963.html
qanholas 2010-11-24
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搞定了
Color C = Color.Blue;
button1.BackColor = RGBHSL.SetBrightness(C, 0.8);
这个 0.8就是想要的效果 谢谢wuyazhe！
Color C = Color.Blue;
button1.BackColor = RGBHSL.SetBrightness(C, 0.8);
这个 0.8就是想要的效果 谢谢wuyazhe！
