원그리기

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
// Add reference for VISA-COM 5.9 Type Library
using Ivi.Visa.Interop;
using System.Diagnostics;
using System.Runtime.InteropServices;
//using Math.Util;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
public struct POINT
{
	public int x, y;
}
public class Test
{
	/*
	double 라디안 = 각도 * (float)(Math.PI / 180);
	double x2 = Math.Cos(라디안) * x1 - Math.Sin(라디안) * y1;
	double y2 = Math.Sin(라디안) * x1 + Math.Cos(라디안) * y1;
	*/
	[DllImport("user32.dll")]
	public static extern bool GetCursorPos(out POINT lpPoint);


	static int CirclePoint_n = 360 * 10;
	static double[] CirclePoint_x = new double[CirclePoint_n];
	static double[] CirclePoint_y = new double[CirclePoint_n];
	static bool bCreateCirclePoint;
	static void CreateCirclePoint()
	{
		int i;
		double ra = 0, x0, y0;
		x0 = 1;
		y0 = 0;
		for (i = 0; i < CirclePoint_n; i++)
		{
			double c, s;
			//x1=x*cos()-y*sin();
			//y1=x*sin()+y*cos();

			ra = Math.PI * 2 * i / CirclePoint_n;

			c = Math.Cos(ra);
			s = Math.Sin(ra);
			CirclePoint_x[i] = x0 * c - y0 * s;
			CirclePoint_y[i] = x0 * s + y0 * c;

			//G.DEBUG_puts(i.ToString()+"\t" + CirclePoint_x[i] + "\t" + CirclePoint_y[i]);
		}
		bCreateCirclePoint = true;

		//RotateMoveScale(x, y, n, ref x, ref y, 45,400,200,500);
	}
	//DrawPolygon(Pen, PointF[])
	//반지름이 1인 원의 좌표중 m개의 점만 얻는다
	//원의 좌표들을 미리 계산하여, RotateMoveScale하여 사용한다
	//7각형같은 다각형의 좌표로도 활용가능
	static void GetCirclePoint(ref double[] x, ref double[] y, int m)
	{
		int i, idx = 0, inc = CirclePoint_n / m;
		for (i = 0; i < m; i++)
		{
			x[i] = CirclePoint_x[idx];
			y[i] = CirclePoint_y[idx];
			idx += inc;
		}
	}



	static void RotateMoveScale(double[] x, double[] y, int n,
		ref double[] x2, ref double[] y2,
		double deg = 0,//deg=각도 0~360
		double dx = 0, double dy = 0,
		double Scale = 1)
	{
		int i;
		double ra, ix, iy;
		if (deg == 0)
		{
			if ((dx == 0) && (dy == 0))
			{
				if (Scale == 1)
				{
					for (i = 0; i < n; i++)
					{
						x2[i] = x[i];
						y2[i] = y[i];
					}
				}
				else
				{
					for (i = 0; i < n; i++)
					{
						x2[i] = x[i] * Scale;
						y2[i] = y[i] * Scale;
					}
				}
			}
			else
			{
				if (Scale == 1)
				{
					for (i = 0; i < n; i++)
					{
						x2[i] = x[i] + dx;
						y2[i] = y[i] + dy;
					}
				}
				else
				{
					for (i = 0; i < n; i++)
					{
						x2[i] = x[i] * Scale + dx;
						y2[i] = y[i] * Scale + dy;
					}
				}
			}
		}
		else
		{
			double c, s;
			ra = deg * (Math.PI / 180);
			c = Math.Cos(ra);
			s = Math.Sin(ra);
			if ((dx == 0) && (dy == 0))
			{
				if (Scale == 1)
				{
					for (i = 0; i < n; i++)
					{
						ix = x[i];//x와 x2가 같은 경우 문제가 됨
						iy = y[i];
						x2[i] = ix * c - iy * s;
						y2[i] = ix * s + iy * c;
					}
				}
				else
				{
					for (i = 0; i < n; i++)
					{
						ix = x[i];//x와 x2가 같은 경우 문제가 됨
						iy = y[i];
						x2[i] = (ix * c - iy * s) * Scale;
						y2[i] = (ix * s + iy * c) * Scale;
					}
				}
			}
			else
			{
				if (Scale == 1)
				{
					for (i = 0; i < n; i++)
					{
						ix = x[i];//x와 x2가 같은 경우 문제가 됨
						iy = y[i];
						x2[i] = ix * c - iy * s + dx;
						y2[i] = ix * s + iy * c + dy;
					}
				}
				else
				{
					for (i = 0; i < n; i++)
					{
						ix = x[i];//x와 x2가 같은 경우 문제가 됨
						iy = y[i];
						x2[i] = (ix * c - iy * s) * Scale + dx;
						y2[i] = (ix * s + iy * c) * Scale + dy;
					}
				}
			}
		}
	}



	static void DrawPolygon(Graphics g, double[] x, double[] y, int n)
	{
		PointF[] p = new PointF[n];
		int i;
		for (i = 0; i < n; i++)
		{
			p[i] = new PointF((float)x[i], (float)y[i]);
		}

		g.DrawPolygon(System.Drawing.Pens.LightGray, p);
	}
	static void Move(double[] x, double[] y, int n,
		ref double[] x2, ref double[] y2,
		double dx, double dy)
	{
		int i;
		for (i = 0; i < n; i++)
		{
			x2[i] = x[i] + dx;
			y2[i] = y[i] + dy;
		}
	}
	void Rotate(double[] x, double[] y, int n, double deg,//deg=각도 0~360
		ref double[] x2, ref double[] y2)
	{
		int i;
		double ra = deg * (Math.PI / 180),
			c, s;
		c = Math.Cos(ra);
		s = Math.Sin(ra);
		for (i = 0; i < n; i++)
		{
			x2[i] = x[i] * c - y[i] * s;
			y2[i] = x[i] * s + y[i] * c;
		}
	}



	//시작점,중심점으로 각도 계산
	static public double Get_deg_from_two_point(double ox, double oy,
		double x, double y)
	{
		return (180 / Math.PI * Math.Atan2(y - oy, x - ox));
	}
	static void test5()
	{
		double d;
		d = Get_deg_from_two_point(0, 0, 1, 0);//d=0
		G.DEBUG_puts_double("d", d);
		d = Get_deg_from_two_point(0, 0, 1, 1);//d=45
		G.DEBUG_puts_double("d", d);
		d = Get_deg_from_two_point(0, 0, 0, 1);//d=90
		G.DEBUG_puts_double("d", d);
		d = Get_deg_from_two_point(0, 0, -1, 1);//d=135
		G.DEBUG_puts_double("d", d);
		d = Get_deg_from_two_point(0, 0, -1, 0);//d=180
		G.DEBUG_puts_double("d", d);
		d = Get_deg_from_two_point(0, 0, -1, -1);//d=-135
		G.DEBUG_puts_double("d", d);
		d = Get_deg_from_two_point(0, 0, 1, -1);//d=-45
		G.DEBUG_puts_double("d", d);
	}


	//두점을 연결하는 직선의 방정식
	//y = ((y2 ? y1) / (x2 ? x1)) (x ? x1) + y1
	//두께가 d이고, 2점을 연결하는 직선1과, px,py에서 시작하는 수평선이 직선1과 만나는 지점구하기
	//(직선1과는 d/2만큼 떨어진 좌표이다.)
	//수평선은 직선1의 방정식에서 y값을 알고 있고, x좌표만 구하면 된다.(-d/2)



	static void Circle_r(Graphics g, double x1, double y1, double r)
	{

	}
	static void Circle_d(Graphics g, double x1, double y1, double d)
	{
		Circle_r(g, x1, y1, d / 2);
	}
	//두께가 d인 라인 그리기
	static void DrawWidthLine(Graphics g, double x1, double y1, double x2, double y2, double d)
	{
		Circle_d(g, x1, y1, d);
		Circle_d(g, x2, y2, d);

	}


	static public double angle;
	static public void DEBUG_Test_Paint(Form wnd, PaintEventArgs e)
	{
		Graphics g = e.Graphics;
		/*Font fnt = new Font("Arial", 10);

		// Draw a string on the PictureBox.
		g.DrawString("This is a diagonal line drawn on the control",
			fnt, System.Drawing.Brushes.Blue, new Point(30, 30));
		// Draw a line in the PictureBox.
		g.DrawLine(System.Drawing.Pens.Red, 10, 20,100, 150);*/
		if (bCreateCirclePoint == false)
		{
			CreateCirclePoint();
		}
		else { }

		POINT pt;
		GetCursorPos(out pt);

		int n = 8;
		double[] x2 = new double[n];
		double[] y2 = new double[n];

		GetCirclePoint(ref x2, ref y2, n);

		pt.x = 920;
		pt.y = 240;
		//Move(x, y, n,ref x2, ref y2,(double)pt.x, (double)pt.y);
		RotateMoveScale(x2, y2, n, ref x2, ref y2, angle, (double)pt.x, (double)pt.y, 5);
		//angle += 10;
		DrawPolygon(g, x2, y2, n);

		//DrawPolygon(g, x, y, n);


		//test5();
	}

	static public void DEBUG_Test3(Form wnd)
	{
		POINT p;
		GetCursorPos(out p);

	}
	static public void DEBUG_Test2(Form wnd)
	{
		Graphics g = wnd.CreateGraphics();
		CreateCirclePoint();
	}
	static public void DEBUG_Test4(Form wnd)
	{
		Graphics g = wnd.CreateGraphics();
		Rectangle r = new Rectangle(10, 20, 30, 40);

		POINT pt;
		Point p = new Point();
		GetCursorPos(out pt);
		p.X = pt.x;
		p.Y = pt.y;
		r.Location = p;
		r.Width = 10;
		r.Height = 2;

		System.Drawing.SolidBrush br = new System.Drawing.SolidBrush(System.Drawing.Color.Red);
		g.FillRectangle(br, r);
	}
	static public void DEBUG_test1(Form wnd, int x, int y)
	{
		Graphics g = wnd.CreateGraphics();
		Pen pen = new Pen(Color.DarkSeaGreen);

		g.DrawArc(pen, x, y, 20, 20, 0, 270);
	}
	static public void DEBUG_test4(Form wnd, int x, int y)
	{
		Graphics g = wnd.CreateGraphics();
		Pen pen = new Pen(Color.DarkSeaGreen);

		g.DrawArc(pen, x, y, 20, 20, 0, 270);
	}
}