internal static Color BaseSpecularColor(Color baseColor)
{
float h, s, v;
Color_Util.ColorToHSV(baseColor, out h, out s, out v);
Color fullValue = Color_Util.HSVToColor(h, s, 1f);
fullValue.A = baseColor.A;
return(Color.Lerp(baseColor, fullValue, 0.5f));
}
/// <summary>
/// Adjusts base color lightness up if it's too close to the BlackLevel
/// </summary>
private static XnaHSL AdjustBaseColor(Color color, float blackLevel)
{
// Use HSV instead of HSL to have finer control over the saturation
float h, s, v;
Color_Util.ColorToHSV(color, out h, out s, out v);
float adjustedV = BlackLevelAdjustment(v, blackLevel);
// Adjust the saturation down if the color is brightened, so
// extremely dark colors don't have strangely high saturation
float adjustedS = adjustedV == 0 ? 0 : s * (v / adjustedV);
Color adjusted = Color_Util.HSVToColor(h, adjustedS, adjustedV);
adjusted.A = color.A;
return(new XnaHSL(adjusted));
}