hsb.bm

$If HSB = UNDEFINED Then
$Let HSB = DEFINED

Function hsb~& (huein As Integer, satin As Integer, brightin As Integer)
    Dim hue, sat, bright
    Dim redout, greenout, blueout
    Dim hueprimary, huesecondary
    Dim satprimary, satsecondary, sattertiary
    hue = huein Mod 360
    If hue < 0 Then hue = hue + 360
    sat = satin / 100
    bright = brightin / 100
    If sat > 1 Then s = 1
    If bright > 1 Then b = 1
    If bright <= 0 Then hsb = _RGB(0, 0, 0): Exit Function
    If sat <= 0 Then hsb = _RGB(b * 255, b * 255, b * 255): Exit Function
    If (hue >= 0) And (hue < 120) Then
        hueprimary = 1 - (hue / 120)
        huesecondary = hue / 120
        satprimary = (1 - hueprimary) * (1 - sat)
        satsecondary = (1 - huesecondary) * (1 - sat)
        sattertiary = 1 - sat
        redout = (bright * 255) * (hueprimary + satprimary)
        greenout = (bright * 255) * (huesecondary + satsecondary)
        blueout = (bright * 255) * sattertiary
    ElseIf (hue >= 120) And (hue < 240) Then
        hueprimary = 1 - ((hue - 120) / 120)
        huesecondary = (hue - 120) / 120
        satprimary = (1 - hueprimary) * (1 - sat)
        satsecondary = (1 - huesecondary) * (1 - sat)
        sattertiary = 1 - sat
        redout = (bright * 255) * sattertiary
        greenout = (bright * 255) * (hueprimary + satprimary)
        blueout = (bright * 255) * (huesecondary + satsecondary)
    ElseIf (hue >= 240) And (hue <= 360) Then
        hueprimary = 1 - ((hue - 240) / 120)
        huesecondary = (hue - 240) / 120
        satprimary = (1 - hueprimary) * (1 - sat)
        satsecondary = (1 - huesecondary) * (1 - sat)
        sattertiary = 1 - sat
        redout = (bright * 255) * (huesecondary + satsecondary)
        greenout = (bright * 255) * sattertiary
        blueout = (bright * 255) * (hueprimary + satprimary)
    End If
    hsb = _RGB(redout, greenout, blueout)
End Function

$End If