211 lines
4.4 KiB
C#
211 lines
4.4 KiB
C#
using UnityEngine;
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using System;
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namespace HSVPicker
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{
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#region ColorUtilities
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public static class HSVUtil
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{
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public static HsvColor ConvertRgbToHsv(Color color)
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{
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return ConvertRgbToHsv((int)(color.r * 255), (int)(color.g * 255), (int)(color.b * 255));
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}
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//Converts an RGB color to an HSV color.
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public static HsvColor ConvertRgbToHsv(double r, double b, double g)
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{
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double delta, min;
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double h = 0, s, v;
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min = Math.Min(Math.Min(r, g), b);
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v = Math.Max(Math.Max(r, g), b);
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delta = v - min;
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if (v.Equals(0))
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s = 0;
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else
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s = delta / v;
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if (s.Equals(0))
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h = 360;
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else
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{
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if (r.Equals(v))
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h = (g - b) / delta;
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else if (g.Equals(v))
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h = 2 + (b - r) / delta;
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else if (b.Equals(v))
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h = 4 + (r - g) / delta;
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h *= 60;
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if (h <= 0.0)
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h += 360;
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}
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HsvColor hsvColor = new HsvColor();
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hsvColor.H = 360 - h;
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hsvColor.S = s;
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hsvColor.V = v / 255;
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return hsvColor;
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}
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// Converts an HSV color to an RGB color.
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public static Color ConvertHsvToRgb(double h, double s, double v, float alpha)
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{
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double r = 0, g = 0, b = 0;
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if (s.Equals(0))
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{
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r = v;
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g = v;
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b = v;
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}
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else
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{
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int i;
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double f, p, q, t;
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if (h.Equals(360))
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h = 0;
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else
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h = h / 60;
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i = (int)(h);
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f = h - i;
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p = v * (1.0 - s);
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q = v * (1.0 - (s * f));
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t = v * (1.0 - (s * (1.0f - f)));
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switch (i)
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{
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case 0:
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r = v;
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g = t;
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b = p;
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break;
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case 1:
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r = q;
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g = v;
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b = p;
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break;
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case 2:
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r = p;
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g = v;
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b = t;
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break;
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case 3:
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r = p;
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g = q;
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b = v;
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break;
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case 4:
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r = t;
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g = p;
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b = v;
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break;
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default:
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r = v;
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g = p;
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b = q;
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break;
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}
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}
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return new Color((float)r, (float)g, (float)b, alpha);
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}
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}
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#endregion ColorUtilities
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// Describes a color in terms of
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// Hue, Saturation, and Value (brightness)
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#region HsvColor
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public struct HsvColor
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{
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/// <summary>
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/// The Hue, ranges between 0 and 360
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/// </summary>
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public double H;
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/// <summary>
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/// The saturation, ranges between 0 and 1
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/// </summary>
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public double S;
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// The value (brightness), ranges between 0 and 1
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public double V;
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public float normalizedH
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{
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get
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{
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return (float)H / 360f;
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}
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set
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{
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H = (double)value * 360;
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}
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}
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public float normalizedS
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{
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get
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{
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return (float)S;
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}
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set
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{
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S = (double)value;
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}
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}
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public float normalizedV
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{
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get
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{
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return (float)V;
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}
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set
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{
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V = (double)value;
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}
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}
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public HsvColor(double h, double s, double v)
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{
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this.H = h;
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this.S = s;
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this.V = v;
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}
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public override string ToString()
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{
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return "{" + H.ToString("f2") + "," + S.ToString("f2") + "," + V.ToString("f2") + "}";
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}
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}
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#endregion HsvColor
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}
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