■ HSV 색상 선택기를 만드는 방법을 보여준다.
▶ Point2D.cs
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namespace TestProject; /// <summary> /// 2D 포인트 /// </summary> public class Point2D { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region X 좌표 - X /// <summary> /// X 좌표 /// </summary> public double X { get; set; } #endregion #region Y 좌표 - Y /// <summary> /// Y 좌표 /// </summary> public double Y { get; set; } #endregion } |
▶ ColorPicker.cs
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using System.Drawing.Imaging; namespace TestProject; /// <summary> /// 색상 선택기 /// </summary> public class ColorPicker { //////////////////////////////////////////////////////////////////////////////////////////////////// Enumeration ////////////////////////////////////////////////////////////////////////////////////////// Public #region 영역 - Area /// <summary> /// 영역 /// </summary> public enum Area { /// <summary> /// 외부 /// </summary> Outside, /// <summary> /// 휠 /// </summary> Wheel, /// <summary> /// 삼각형 /// </summary> Triangle } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Structure ////////////////////////////////////////////////////////////////////////////////////////// Public #region 선택 결과 - PickResult /// <summary> /// 선택 결과 /// </summary> public struct PickResult { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 영역 - Area /// <summary> /// 영역 /// </summary> public Area Area { get; set; } #endregion #region 색상 - Hue /// <summary> /// 색상 /// </summary> public double? Hue { get; set; } #endregion #region 채도 - Saturation /// <summary> /// 채도 /// </summary> public double? Saturation { get; set; } #endregion #region 값 - Value /// <summary> /// 값 /// </summary> public double? Value { get; set; } #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 크기 - Size /// <summary> /// 크기 /// </summary> public int Size { get; } #endregion #region 중앙 X - CenterX /// <summary> /// 중앙 X /// </summary> public int CenterX => Size / 2; #endregion #region 중앙 Y - CenterY /// <summary> /// 중앙 Y /// </summary> public int CenterY => Size / 2; #endregion #region 내부 반경 - InnerRadius /// <summary> /// 내부 반경 /// </summary> public int InnerRadius => Size * 5 / 12; #endregion #region 외부 반경 - OuterRadius /// <summary> /// 외부 반경 /// </summary> public int OuterRadius => Size / 2; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - ColorPicker(size) /// <summary> /// 생성자 /// </summary> /// <param name="size">크기</param> public ColorPicker(int size = 400) { Size = size; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 이미지 그리기 - DrawImage(hue, saturation, value) /// <summary> /// 이미지 그리기 /// </summary> /// <param name="hue">색상</param> /// <param name="saturation">채도</param> /// <param name="value">값</param> /// <returns>이미지</returns> public Image DrawImage(double hue = 0d, double saturation = 1d, double value = 1d) { Bitmap bitmap = new Bitmap(Size, Size, PixelFormat.Format32bppArgb); for(int y = 0; y < Size; y++) { for(int x = 0; x < Size; x++) { Color color; PickResult pickResult = Pick(x, y); if(pickResult.Area == Area.Outside) { color = Color.Transparent; } else if(pickResult.Area == Area.Wheel) { color = GetHSVColor(pickResult.Hue.Value, saturation, value, 1); } else { color = GetHSVColor(hue, pickResult.Saturation.Value, pickResult.Value.Value, 1); } bitmap.SetPixel(x, y, color); } } return bitmap; } #endregion #region 휠 위치 구하기 - GetWheelPosition(hue) /// <summary> /// 휠 위치 구하기 /// </summary> /// <param name="hue">색상</param> /// <returns>휠 위치</returns> public Point2D GetWheelPosition(double hue) { double middleRadius = (InnerRadius + OuterRadius) / 2; return new Point2D { X = CenterX + middleRadius * Math.Sin(hue), Y = CenterY - middleRadius * Math.Cos(hue) }; } #endregion #region 삼각형 위치 구하기 - GetTrianglePosition(saturation, value) /// <summary> /// 삼각형 위치 구하기 /// </summary> /// <param name="saturation">채도</param> /// <param name="value">값</param> /// <returns>삼각형 위치</returns> public Point2D GetTrianglePosition(double saturation, double value) { double squareRoot3 = Math.Sqrt(3); return new Point2D { X = CenterX + InnerRadius * (2 * value - saturation * value - 1) * squareRoot3 / 2, Y = CenterY + InnerRadius * (1 - 3 * saturation * value) / 2 }; } #endregion #region 선택하기 - Pick(x, y) /// <summary> /// 선택하기 /// </summary> /// <param name="x">X 좌표</param> /// <param name="y">Y 좌표</param> /// <returns>선택 결과</returns> public PickResult Pick(double x, double y) { double distanceFromCenter = Math.Sqrt((x - CenterX) * (x - CenterX) + (y - CenterY) * (y - CenterY)); double squareRoot3 = Math.Sqrt(3); if(distanceFromCenter > OuterRadius) { return new PickResult { Area = Area.Outside }; } else if(distanceFromCenter > InnerRadius) { double angle = Math.Atan2(y - CenterY, x - CenterX) + Math.PI / 2; if(angle < 0) { angle += 2 * Math.PI; } double hue = angle; return new PickResult { Area = Area.Wheel, Hue = hue }; } else { double x1 = (x - CenterX) * 1.0d / InnerRadius; double y1 = (y - CenterY) * 1.0d / InnerRadius; if(0 * x1 + 2 * y1 > 1) { return new PickResult { Area = Area.Outside }; } else if(squareRoot3 * x1 + (-1) * y1 > 1) { return new PickResult { Area = Area.Outside }; } else if(-squareRoot3 * x1 + (-1) * y1 > 1) { return new PickResult { Area = Area.Outside }; } else { double saturation = (1 - 2 * y1) / (squareRoot3 * x1 - y1 + 2); double value = (squareRoot3 * x1 - y1 + 2) / 3; return new PickResult { Area = Area.Triangle, Saturation = saturation, Value = value }; } } } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Private #region RGB 색상 구하기 - GetRGBColor(red, green, blue, alpha) /// <summary> /// RGB 색상 구하기 /// </summary> /// <param name="red">적색</param> /// <param name="green">녹색</param> /// <param name="blue">청색</param> /// <param name="alpha">투명도</param> /// <returns>RGB 색상</returns> private Color GetRGBColor(double red, double green, double blue, double alpha) { return Color.FromArgb ( Math.Min(255, (int)(alpha * 256)), Math.Min(255, (int)(red * 256)), Math.Min(255, (int)(green * 256)), Math.Min(255, (int)(blue * 256)) ); } #endregion #region HSV 색상 구하기 - GetHSVColor(hue, saturation, value, alpha) /// <summary> /// HSV 색상 구하기 /// </summary> /// <param name="hue">색상</param> /// <param name="saturation">채도</param> /// <param name="value">값</param> /// <param name="alpha">알파</param> /// <returns>색상</returns> private Color GetHSVColor(double hue, double saturation, double value, double alpha) { double chroma = value * saturation; double step = Math.PI / 3; double interm = chroma * (1 - Math.Abs((hue / step) % 2.0 - 1)); double shift = value - chroma; if(hue < 1 * step) return GetRGBColor(shift + chroma, shift + interm, shift + 0 , alpha); if(hue < 2 * step) return GetRGBColor(shift + interm, shift + chroma, shift + 0 , alpha); if(hue < 3 * step) return GetRGBColor(shift + 0 , shift + chroma, shift + interm, alpha); if(hue < 4 * step) return GetRGBColor(shift + 0 , shift + interm, shift + chroma, alpha); if(hue < 5 * step) return GetRGBColor(shift + interm, shift + 0 , shift + chroma, alpha); return GetRGBColor(shift + chroma, shift + 0, shift + interm, alpha); } #endregion } |
▶ MainForm.cs
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namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); double hue = 3.3d; double saturation = 0.4d; double value = 0.9d; ColorPicker colorPicker = new ColorPicker(400); Image colorPickerImage = colorPicker.DrawImage(hue, saturation, value); using(Graphics imageGraphics = Graphics.FromImage(colorPickerImage)) { Pen pen = value < 0.5d ? Pens.White : Pens.Black; Point2D wheelPoint = colorPicker.GetWheelPosition(hue); imageGraphics.DrawEllipse(pen, (float)wheelPoint.X - 5, (float)wheelPoint.Y - 5, 10, 10); Point2D trianglePoint = colorPicker.GetTrianglePosition(saturation, value); imageGraphics.DrawEllipse(pen, (float)trianglePoint.X - 5, (float)trianglePoint.Y - 5, 10, 10); } this.pictureBox.Image = colorPickerImage; } #endregion } } |
