using System;
using System.Drawing;
using System.ComponentModel;
namespace Endogine.ColorEx
{
/// <summary>
/// Summary description for ColorHSB.
/// </summary>
public class ColorHsb : ColorBase
{
float _h;
float _s;
float _b;
/// <summary>
///
/// </summary>
/// <param name="h">hue, 0-360 degrees</param>
/// <param name="s">saturation, 0f-1f</param>
/// <param name="b">brightness, 0f-1f</param>
public ColorHsb(float h, float s, float b)
{
this.A = 255;
this._h = h;
this._s = s;
this._b = b;
}
public ColorHsb(int a, float h, float s, float b)
{
this.A = a;
this._h = h;
this._s = s;
this._b = b;
}
public ColorHsb(Color c)
{
this.ColorRGBA = c;
}
public ColorHsb()
{
}
public ColorHsb(ColorRgbFloat rgb)
{
this.RgbFloat = rgb;
}
//DisplayName is used for Ordinal
[Category("Axis"), ColorInfo("Hue", 360, 360)] //Description("Hue"), DefaultValue("359"), DisplayName("0"), ColorInfo("Hue", 360f)]
/// <summary>
/// Hue, 0f-360f
/// </summary>
public float H
{
get {return this._h;}
set {this._h = value;}
}
[Category("Axis"), ColorInfo("Saturation", 100)] //Description("Saturation"), DefaultValue("1"), DisplayName("1")]
/// <summary>
/// Saturation, 0f-1f
/// </summary>
public float S
{
get {return this._s;}
set {this._s = value;}
}
[Category("Axis"), ColorInfo("Brightness", 100)] //Description("Brightness"), DefaultValue("1"), DisplayName("2")]
/// <summary>
/// Brightness, 0f-1f
/// </summary>
public float B
{
get {return this._b;}
set {this._b = value;}
}
public static Color InterpolateRgbInHsbSpace(Color c1, Color c2, float position)
{
ColorHsb hsb1 = new ColorHsb(c1);
hsb1.Interpolate(new ColorHsb(c2), position);
return hsb1.ColorRGBA;
}
public void Interpolate(ColorHsb hsbTo, float position)
{
this.A = (int)(position*(hsbTo.A - this.A)+this.A);
if (Math.Abs(hsbTo.H - this.H) > 180)
{
if (this.H < hsbTo.H)
this.H+=360;
else
this.H-=360;
this.H = position*(hsbTo.H - this.H)+this.H;
if (this.H < 0)
this.H+=360;
else if (this.H > 360)
this.H-=360;
}
else
this.H = position*(hsbTo.H - this.H)+this.H;
this.S = position*(hsbTo.S - this.S)+this.S;
this.B = position*(hsbTo.B - this.B)+this.B;
}
public override ColorRgbFloat RgbFloat
{
get
{
if (this.S > 0)
{
float fH, fS, fB;
fH = this.H / 60f;
fS = this.S;
fB = this.B;
uint nH = (uint)fH;
float fF, fP, fQ, fT;
fF = fH - (float)nH;
fP = fB * (1f - fS);
fQ = fB * (1f - fS * fF);
fT = fB * (1f - fS * (1f - fF));
float r, g, b;
r = g = b = 0;
switch (nH)
{
case 0: r = fB; g = fT; b = fP; break;
case 1: r = fQ; g = fB; b = fP; break;
case 2: r = fP; g = fB; b = fT; break;
case 3: r = fP; g = fQ; b = fB; break;
case 4: r = fT; g = fP; b = fB; break;
case 5: r = fB; g = fP; b = fQ; break;
}
return new ColorRgbFloat(this.A, r, g, b);
}
else
{
return new ColorRgbFloat(this.A, this.B, this.B, this.B);
}
}
set
{
this.A = value.A;
float r = value.R;
float g = value.G;
float b = value.B;
float min = Math.Min(Math.Min(r, g), b);
float max = Math.Max(Math.Max(r, g), b);
float range = max - min;
bool bIsV = true; //HSV or HSL? Which is which?
this._h = 0;
if (range == 0) //gray
{
this._h = 0;
this._s = 0;
this._b = max;
}
else
{
if (bIsV)
{
this._b = max;
this._s = range / max;
}
else
{
float l = (min + max) / 2;
this._b = l;
if (l < 0.5)
this._s = range / (min + max);
else
this._s = range / (2 - max - min);
}
float rX = (((max - r) / 6) + (range / 2)) / range;
float gX = (((max - g) / 6) + (range / 2)) / range;
float bX = (((max - b) / 6) + (range / 2)) / range;
if (r == max)
this._h = bX - gX;
else if (g == max)
this._h = 1f / 3 + rX - bX;
else if (b == max)
this._h = 2f / 3 + gX - rX;
if (this._h < 0)
this._h += 1;
if (this._h > 1)
this._h -= 1;
this._h *= 360;
}
}
}
public override Color ColorRGBA
{
get
{
if (this.S > 0)
{
float fH, fS, fB;
fH = this.H / 60f;
fS = this.S;// / 100f;
fB = this.B;// / 100f;
uint nH = (uint)fH;
float fF, fP, fQ, fT;
fF = fH - (float)nH;
fP = fB * (1f - fS);
fQ = fB * (1f - fS * fF);
fT = fB * (1f - fS * (1f - fF));
int r, g, b;
r = g = b = 0;
switch (nH)
{
case 0: r = (int)(255f * fB); g = (int)(255f * fT); b = (int)(255f * fP); break;
case 1: r = (int)(255f * fQ); g = (int)(255f * fB); b = (int)(255f * fP); break;
case 2: r = (int)(255f * fP); g = (int)(255f * fB); b = (int)(255f * fT); break;
case 3: r = (int)(255f * fP); g = (int)(255f * fQ); b = (int)(255f * fB); break;
case 4: r = (int)(255f * fT); g = (int)(255f * fP); b = (int)(255f * fB); break;
case 5: r = (int)(255f * fB); g = (int)(255f * fP); b = (int)(255f * fQ); break;
}
return Color.FromArgb(this.A, r, g, b);
}
else
{
int nGray = (int)(this.B * 255);
return Color.FromArgb(this.A, nGray, nGray, nGray);
}
}
set
{
this.A = value.A;
// this._h= c.GetHue();
// this._s = c.GetSaturation();
// this._b = c.GetBrightness();
float r = (float)value.R / 255;
float g = (float)value.G / 255;
float b = (float)value.B / 255;
float min = Math.Min(Math.Min(r, g), b);
float max = Math.Max(Math.Max(r, g), b);
float range = max - min;
bool bIsV = true; //HSV or HSL? Which is which?
this._h = 0;
if (range == 0) //gray
{
this._h = 0;
this._s = 0;
this._b = max;
}
else
{
if (bIsV)
{
this._b = max;
this._s = range / max;
}
else
{
float l = (min + max) / 2;
this._b = l;
if (l < 0.5)
this._s = range / (min + max);
else
this._s = range / (2 - max - min);
}
float rX = (((max - r) / 6) + (range / 2)) / range;
float gX = (((max - g) / 6) + (range / 2)) / range;
float bX = (((max - b) / 6) + (range / 2)) / range;
if (r == max)
this._h = bX - gX;
else if (g == max)
this._h = 1f / 3 + rX - bX;
else if (b == max)
this._h = 2f / 3 + gX - rX;
if (this._h < 0)
this._h += 1;
if (this._h > 1)
this._h -= 1;
this._h *= 360;
}
}
}
public override Vector4 Vector
{
get
{
return new Vector4(this._h / 360, this._s, this._b, (float)this.A / 255);
}
set
{
this.A = (int)(value.W * 255);
this._h = value.X * 360;
this._s = value.Y;
this._b = value.Z;
}
}
public Color To4Bytes()
{
return Color.FromArgb(this.A, (int)(this.H / 360f * 255), (int)(this.S * 255), (int)(this.B * 255));
}
public override void Validate()
{
if (this._h > 360)
this._h -= 360f;
else if (this._h < 0)
this._h += 360f;
if (this._s > 1)
this._s = 1f;
else if (this._s < 0)
this._s = 0f;
if (this._b > 1)
this._b = 1f;
else if (this._b < 0)
this._b = 0f;
}
}
}
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