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added comments to the color Scatter function (I never remember the meaning of the params)

This commit is contained in:
Paolo Cignoni 2012-01-18 11:24:33 +00:00
parent 048b884a3e
commit ac3107cdb4
1 changed files with 10 additions and 10 deletions
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20
vcg/space/color4.h
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@ -225,27 +225,27 @@ inline void SetGrayShade(float f)
/** Given an integer returns a well ordering of colors
// so that every color differs as much as possible form the previous one
// params:
// n is the maximum expected value (max of the range)
// v is the requested position
// range is the maximum expected value (max of the range)
// value is the requested position (it must be <range);
*/
inline static Color4 Scatter(int n, int a,float Sat=.3f,float Val=.9f)
inline static Color4 Scatter(int range, int value,float Sat=.3f,float Val=.9f)
{
int b, k, m=n;
int r =n;
int b, k, m=range;
int r =range;
for (b=0, k=1; k<n; k<<=1)
if (a<<1>=m) {
for (b=0, k=1; k<range; k<<=1)
if (value<<1>=m) {
if (b==0) r = k;
b += k;
a -= (m+1)>>1;
value -= (m+1)>>1;
m >>= 1;
}
else m = (m+1)>>1;
if (r>n-b) r = n-b;
if (r>range-b) r = range-b;
//TRACE("Scatter range 0..%i, in %i out %i\n",n,a,b);
Color4 rc;
rc.SetHSVColor(float(b)/float(n),Sat,Val);
rc.SetHSVColor(float(b)/float(range),Sat,Val);
return rc;
}