一个关于颜色转换的问题

CreateMaster

请问：HSB颜色和RGB颜色如何互相转换？
PhotoShop中的拾色器使用的就是HSB颜色。
H好像是“色相”，取值范围是0-360
S好像是“饱和度”，取值范围是0-100%
B好像是“明度”，取值范围是0-100%

CreateMaster

终于得到了代码，感谢nowpaper.
#define mid(a,b,c) (a>=b&&a<=c)? Ab>=a&&b<=c ? b:c))

void RGB2HSV(int nRed,int nGreen, int nBlue, int *nH,int *nS, int *nV)
{
int nLow,nMid,nHigh;

if(nRed==nGreen&&nGreen==nBlue){
*nH=0;
*nS==0;
*nV=nRed;
return ;
}

nLow=min( nRed,min(nGreen,nBlue));
nHigh=max(nRed,max(nGreen,nBlue));
nMid=mid(nRed,nGreen,nBlue);

*nV=(nLow+nHigh)/2;
*nS=nHigh-nLow;

int nCommon=(int)(60.0*(double)(nMid-nLow)/(double)(nHigh-nLow));

if(nRed==nLow&&nBlue==nHigh)
*nH=240-nCommon;
else if(nRed==nLow&&nGreen==nHigh)
*nH=120+nCommon;
else if(nGreen==nLow&&nRed==nHigh)
*nH=360-nCommon;
else if(nGreen==nLow&&nBlue==nHigh)
*nH=240-nCommon;
else if(nBlue==nLow&&nGreen==nHigh)
*nH=120-nCommon;
else if(nBlue==nLow&&nRed==nHigh)
*nH=nCommon;
}