// HSB2RGB convert HSB (HSV) color to RGB
func HSB2RGB(h, s, b int) (int, int, int) {
var r, g, bb float64
if h+s+b == 0 {
return 0, 0, 0
}
ts := float64(s) / 100.0
tb := float64(b) / 100.0
f := float64(h)/60.0 - math.Floor(float64(h)/60.0)
p := (tb * (1 - ts))
q := (tb * (1 - f*ts))
t := (tb * (1 - (1-f)*ts))
switch (h / 60) % 6 {
case 0:
r, g, bb = tb, t, p
case 1:
r, g, bb = q, tb, p
case 2:
r, g, bb = p, tb, t
case 3:
r, g, bb = p, q, tb
case 4:
r, g, bb = t, p, tb
case 5:
r, g, bb = tb, p, q
}
return int(mathutil.Round(r*0xFF, 0)),
int(mathutil.Round(g*0xFF, 0)),
int(mathutil.Round(bb*0xFF, 0))
}
// Float floating number pretty formating
func Float(f float64) float64 {
if f < 10.0 {
return mathutil.Round(f, 2)
}
return mathutil.Round(f, 1)
}