■ 특정 위치를 기준으로 회전하는 방법을 보여준다.
▶ MainFormc.cs
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using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); #region 이벤트를 설정한다. this.canvasPictureBox.Paint += canvasPictureBox_Paint; #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 캔버스 픽처 박스 페인트시 처리하기 - canvasPictureBox_Paint(sender, e) /// <summary> /// 캔버스 픽처 박스 페인트시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void canvasPictureBox_Paint(object sender, PaintEventArgs e) { e.Graphics.SmoothingMode = SmoothingMode.AntiAlias; DrawArrow(e.Graphics, Pens.Blue); Point center = new Point(50, 70); e.Graphics.FillEllipse(Brushes.Red, center.X - 3, center.Y - 3, 6, 6); e.Graphics.Transform = GetMatrix(center, 30); DrawArrow(e.Graphics, Pens.Green); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 화살표 그리기 - DrawArrow(graphics, pen) /// <summary> /// 화살표 그리기 /// </summary> /// <param name="graphics">그래픽스</param> /// <param name="pen">펜</param> private void DrawArrow(Graphics graphics, Pen pen) { Point[] pointArray = { new Point(50 , 50), new Point(150, 50), new Point(150, 20), new Point(200, 70), new Point(150, 120), new Point(150, 90), new Point(50 , 90) }; graphics.DrawPolygon(pen, pointArray); } #endregion #region 매트릭스 구하기 - GetMatrix(centerPoint, rotateAngle) /// <summary> /// 매트릭스 구하기 /// </summary> /// <param name="centerPoint">중심 포인트</param> /// <param name="rotateAngle">회전 각도</param> /// <returns>매트릭스</returns> private Matrix GetMatrix(Point centerPoint, float rotateAngle) { Matrix matrix = new Matrix(); matrix.RotateAt(rotateAngle, centerPoint); return matrix; } #endregion } } |
