■ 재귀적 오버래핑 눈송이 프랙탈(Recursive Overlapping Snow Flake Fractal)을 그리는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 개시자 포인트 리스트 /// </summary> private List<PointF> initiatorPointList; /// <summary> /// 스케일 팩터 /// </summary> private float scaleFactor; /// <summary> /// 생성자 델타 세타 /// </summary> private List<float> generatorDeltaTheta; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); #region 이벤트를 설정한다. this.drawButton.Click += drawButton_Click; #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 그리기 버튼 클릭시 처리하기 - drawButton_Click(sender, e) /// <summary> /// 그리기 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void drawButton_Click(object sender, EventArgs e) { Cursor = Cursors.WaitCursor; Application.DoEvents(); this.initiatorPointList = new List<PointF>(); float sqrt3 = (float)Math.Sqrt(3.0); float side1 = (this.canvasPictureBox.ClientSize.Height - 10f) / 2f; float side2 = (this.canvasPictureBox.ClientSize.Width - 10f) / 2f / sqrt3 * 2f; float side = Math.Min(side1, side2); float height = side * sqrt3 / 2f; float y1 = (this.canvasPictureBox.ClientSize.Height - 2 * side) / 2; float y2 = y1 + side / 2; float y3 = y2 + side; float y4 = y1 + 2 * side; float x1 = (this.canvasPictureBox.ClientSize.Width - 2 * height) / 2; float x2 = x1 + height; float x3 = x2 + height; this.initiatorPointList.Add(new PointF(x1, y2)); this.initiatorPointList.Add(new PointF(x2, y1)); this.initiatorPointList.Add(new PointF(x3, y2)); this.initiatorPointList.Add(new PointF(x3, y3)); this.initiatorPointList.Add(new PointF(x2, y4)); this.initiatorPointList.Add(new PointF(x1, y3)); this.initiatorPointList.Add(new PointF(x1, y2)); this.scaleFactor = (float)(1.0 / 3.0); this.generatorDeltaTheta = new List<float>(); float piOver3 = (float)(Math.PI / 3f); this.generatorDeltaTheta.Add(0 ); this.generatorDeltaTheta.Add(piOver3 ); this.generatorDeltaTheta.Add(piOver3 ); this.generatorDeltaTheta.Add(-2 * piOver3); this.generatorDeltaTheta.Add(-piOver3 ); this.generatorDeltaTheta.Add(-piOver3 ); this.generatorDeltaTheta.Add(2 * piOver3 ); int depth = int.Parse(this.depthTextBox.Text); Bitmap bitmap = new Bitmap ( this.canvasPictureBox.ClientSize.Width, this.canvasPictureBox.ClientSize.Height ); this.canvasPictureBox.Image = bitmap; using(Graphics graphics = Graphics.FromImage(bitmap)) { graphics.SmoothingMode = SmoothingMode.AntiAlias; DrawSnowFlakeFractal(graphics, depth); } Cursor = Cursors.Default; } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 눈송이 에지 그리기 - DrawSnowFlakeEdge(graphics, depth, point1, theta, distance) /// <summary> /// 눈송이 에지 그리기 /// </summary> /// <param name="graphics">그래픽스</param> /// <param name="depth">깊이</param> /// <param name="point1">포인트 1</param> /// <param name="theta">세타</param> /// <param name="distance">거리</param> private void DrawSnowFlakeEdge(Graphics graphics, int depth, ref PointF point1, float theta, float distance) { if(depth == 0) { PointF point2 = new PointF ( (float)(point1.X + distance * Math.Cos(theta)), (float)(point1.Y + distance * Math.Sin(theta)) ); graphics.DrawLine(Pens.Blue, point1, point2); point1 = point2; return; } distance *= this.scaleFactor; for(int i = 0; i < this.generatorDeltaTheta.Count; i++) { theta += this.generatorDeltaTheta[i]; DrawSnowFlakeEdge(graphics, depth - 1, ref point1, theta, distance); } } #endregion #region 눈송이 프랙탈 그리기 - DrawSnowFlakeFractal(graphics, depth) /// <summary> /// 눈송이 프랙탈 그리기 /// </summary> /// <param name="graphics">그래픽스</param> /// <param name="depth">깊이</param> private void DrawSnowFlakeFractal(Graphics graphics, int depth) { graphics.Clear(this.canvasPictureBox.BackColor); for(int i = 1; i < this.initiatorPointList.Count; i++) { PointF point1 = this.initiatorPointList[i - 1]; PointF point2 = this.initiatorPointList[i ]; float deltaX = point2.X - point1.X; float deltaY = point2.Y - point1.Y; float length = (float)Math.Sqrt(deltaX * deltaX + deltaY * deltaY); float theta = (float)Math.Atan2(deltaY, deltaX); DrawSnowFlakeEdge(graphics, depth, ref point1, theta, length); } } #endregion } } |
