/// <summary>
/// 輝度・彩度はそのままで、hueで指定された色相の色を得る。
/// </summary>
/// <param name="color">色</param>
/// <param name="hue">変更先の色相(0≦hue≦360)</param>
/// <returns>変化させた色</returns>
public static Color MonoricColor(Color color, float hue)
{
ColorHSV hsv = ColorConverter.ConvertRGBtoHSV(color);
ColorHSV newHsv = ColorHSV.FromHSV(hue, hsv.Saturation, hsv.Value);
return(ColorConverter.ConvertHSVtoRGB(newHsv, color.A));
}
/// <summary>
/// RGBからHSVへ変換を行う
/// </summary>
/// <param name="rgb">RGBカラー</param>
/// <returns>HSVカラー</returns>
public static ColorHSV ConvertRGBtoHSV(Color rgb)
{
int min = Math.Min(rgb.G, Math.Min(rgb.B, rgb.R));
int max = Math.Max(rgb.G, Math.Max(rgb.B, rgb.R));
float hue = GetHue(rgb, min, max);
float saturation = (max != 0) ? (float)(max - min) / (float)(max) : 0f;
float value = (float)(max) / 255.0f;
return(ColorHSV.FromHSV(hue, saturation, value));
}
/// <summary>
/// HSVの色調整を行ってピクセルデータを返す。
/// </summary>
/// <param name="c">カラー</param>
/// <param name="hue">色差加算値(-360≦hue≦360)</param>
/// <param name="saturation">彩度加割合(-255≦saturation≦255)</param>
/// <param name="value">明度加算割合(-255≦value≦255)</param>
/// <returns>カラー</returns>
public static Color ProcessHSVFilter(Color c, int hue, int saturation, int value)
{
if (((hue == 0) && (saturation == 0) && (value == 0)))
{
return(c); // 色変換しない。
}
var srcHSV = ColorConverter.ConvertRGBtoHSV(c);
float h = ColorUtility.GetHueWithLimitedRange((srcHSV.Hue + hue) % 360.0f);
float s = ColorUtility.ModifyValueByPercent(srcHSV.Saturation, 0f, 1.0f, saturation / 255.0f);
float v = Math.Min(ColorUtility.ModifyValueByPercent(srcHSV.Value, 0f, srcHSV.Value * 2, value / 255.0f), 1.0f);
return(ColorConverter.ConvertHSVtoRGB(ColorHSV.FromHSV(h, s, v), c.A));
}