첨부 실행 코드는 나눔고딕코딩 폰트를 사용합니다.
유용한 소스 코드가 있으면 icodebroker@naver.com으로 보내주시면 감사합니다.
블로그 자료는 자유롭게 사용하세요.

■ 장미 곡선(Rose Curve) 그리기

------------------------------------------------------------------------------------------------------------------------


TestProject.zip


MainForm.cs

 

 

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

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// 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)

        {

            float a = float.Parse(this.aTextBox.Text);

            int   n = int.Parse(this.nTextBox.Text);

            int   d = int.Parse(this.dTextBox.Text);

 

            Bitmap bitmap = new Bitmap

            (

                this.canvasPictureBox.ClientSize.Width,

                this.canvasPictureBox.ClientSize.Height

            );

 

            using(Graphics graphics = Graphics.FromImage(bitmap))

            {

                graphics.Clear(Color.White);

 

                graphics.SmoothingMode = SmoothingMode.AntiAlias;

 

                RectangleF rectangle = new RectangleF

                (

                    -a - 0.1f,

                    -a - 0.1f,

                    2 * a + 0.2f,

                    2 * a + 0.2f

                );

 

                PointF[] pointArray =

                {

                    new PointF(0, bitmap.Height),

                    new PointF(bitmap.Width, bitmap.Height),

                    new PointF(0, 0),

                };

 

                graphics.Transform = new Matrix(rectangle, pointArray);

 

                DrawCurve(graphics, a, n, d);

 

                DrawAxes(graphics, rectangle.Right);

 

                this.canvasPictureBox.Image = bitmap;

            }

        }

 

        #endregion

 

        //////////////////////////////////////////////////////////////////////////////// Function

 

        #region 곡선 그리기 - DrawCurve(graphics, a, n, d)

 

        /// <summary>

        /// 곡선 그리기

        /// </summary>

        /// <param name="graphics">그래픽스</param>

        /// <param name="a">A</param>

        /// <param name="n">N</param>

        /// <param name="d">D</param>

        private void DrawCurve(Graphics graphics, float a, int n, int d)

        {

            const int pointCount = 1000;

 

            double period = Math.PI * d;

 

            if((n % 2 == 0) || (d % 2 == 0))

            {

                period *= 2;

            }

 

            double dtheta = period / pointCount;

 

            List<PointF> pointList = new List<PointF>();

 

            double k = (double)n / d;

 

            for(int i = 0; i < pointCount; i++)

            {

                double theta = i * dtheta;

                double r     = a * Math.Cos(k * theta);

                float  x     = (float)(r * Math.Cos(theta));

                float  y     = (float)(r * Math.Sin(theta));

 

                pointList.Add(new PointF(x, y));

            }

 

            graphics.FillPolygon(Brushes.LightBlue, pointList.ToArray());

 

            using(Pen pen = new Pen(Color.Red, 0))

            {

                graphics.DrawLines(pen, pointList.ToArray());

            }

        }

 

        #endregion

        #region 축 그리기 - DrawAxes(graphics, worldMaximumX)

 

        /// <summary>

        /// 축 그리기

        /// </summary>

        /// <param name="graphics">그래픽스</param>

        /// <param name="worldMaximumX">월드 최대 X</param>

        private void DrawAxes(Graphics graphics, float worldMaximumX)

        {

            int maximumX = (int)worldMaximumX;

 

            using(Pen pen = new Pen(Color.Black, 0))

            {

                graphics.DrawLine(pen, -worldMaximumX, 0             , worldMaximumX, 0            );

                graphics.DrawLine(pen, 0             , -worldMaximumX, 0            , worldMaximumX);

 

                float tic = 0.1f;

 

                for(int x = -maximumX; x <= maximumX; x++)

                {

                    graphics.DrawLine(pen,  x  , -tic, x  , tic);

                    graphics.DrawLine(pen, -tic,  x  , tic, x  );

                }

            }

        }

 

        #endregion

    }

}

 

------------------------------------------------------------------------------------------------------------------------

Posted by 사용자 icodebroker

댓글을 달아 주세요