#include???
#include???
#include??
#include?
int?xStart?=?0?yStart?=?0xEnd?=?0?yEnd?=?0R?=?0A=0B=0;
int?count?=?0;
void?init（）
{
	glClearColor（0.0?0.0?0.0?0.0）;
	glMatrixMode（GL_PROJECTION）;
	//gluOrtho2D（06000600）;
	gluOrtho2D（-300?300?-300?300）;
}
void??draw_pixel（float?x?float?y）
{
	glBegin（GL_POINTS）;
	glVertex2f（x?y）;
	glEnd（）;
	glFlush（）;//強制刷新緩沖
}
void?CirclePoints（int?xc?int?yc?int?x?int?y）{
	if?（x?!=?y）{
		draw_pixel（xc?+?x?yc?+?y）;
		draw_pixel（xc?-?x?yc?+?y）;
		draw_pixel（xc?+?x?yc?-?y）;
		draw_pixel（xc?-?x?yc?-?y）;
		draw_pixel（xc?+?y?yc?+?x）;
		draw_pixel（xc?-?y?yc?+?x）;
		draw_pixel（xc?+?y?yc?-?x）;
		draw_pixel（xc?-?y?yc?-?x）;
	}
	else{
		draw_pixel（xc?+?x?yc?+?y）;
		draw_pixel（xc?-?x?yc?+?y）;
		draw_pixel（xc?+?x?yc?-?y）;
		draw_pixel（xc?-?x?yc?-?y）;
	}

}
void?ellipseplotPoints（int?Xcenter?int?yCenter?int?x?int?y）
{
	draw_pixel（Xcenter?+?x?yCenter?+?y）;
	draw_pixel（Xcenter?-?x?yCenter?+?y）;
	draw_pixel（Xcenter?+?x?yCenter?-?y）;
	draw_pixel（Xcenter?-?x?yCenter?-?y）;
}
void?Bresenhamcircle（int?x0int?y0?int?radius）
{
	glColor3f（0.0?1.0?0.0）;
	glPointSize（2.0）;
	int?x?y?d;
	x?=?0;
	y?=?radius;
	d?=?3?-?2?*?radius;
	while?（x	{
		CirclePoints（x0?y0?x?y）;
		if?（d?			d?=?d?+?4?*?x?+?6;
		}
		else
		{
			d?=?d?+?4?*?（x?-?y）?+?10;
			y?-=?1;
		}
		x?+=?1;
	}
	if?（x?==?y）
	{
		CirclePoints（x0?y0?x?y）;
	}
}
void?MidPointCircle（int?x0?int?y0?int?radius）
{
	glColor3f（1.0?0.0?0.0）;
	glPointSize（1.0）;//指定柵格化點的直徑
	int?x?=?0;
	int?y?=?radius;
	int?d?=?1?-?radius;
	CirclePoints（x0?y0?x?y）;
	while?（y>x）
	{
		if?（d?			d?+=?2?*?x?+?3;
		}
		else??{
			d?+=?2?*?（x?-?y）?+?5;
			y--;
		}
		x++;
		CirclePoints（x0?y0?x?y）;
	}
}
void?MidpointEllipe（int?x0?int?y0?int?a?int?b）
{
	glColor3f（0.0?0.0?1.0）;
	glPointSize（1.0）;
	int?x?y;
	float?d1?d2;
	x?=?0;?y?=?b;
	d1?=?b*b?+?a*a*（-b?+?0.25）;
	ellipseplotPoints（x0?y0?x?y）;
	while?（b*b*（x?+?1）?	{
		if?（d1<0）{
			d1?+=?b*b*（2?*?x?+?3）;
			x++;
		}
		else??{
			d1?+=?（b*b*（2?*?x?+?3）?+?a*a*（-2?*?y?+?2））;
			x++;
			y--;
		}
		ellipseplotPoints（x0?y0?x?y）;
	}
	d2?=?sqrt（b*（x?+?0.5））?+?sqrt（float（a*（y?-?1）））?-?sqrt（float（a*b））;
	while?（y?>0）
	{
		if?（d2?<0）?{
			d2?+=?b*b*（2?*?x?+?2）?+?a*a*（-2?*?y?+?3）;
			x++;
			y--;
		}
		else??{
			d2?+=?a*a*（-2?*?y?+?3）;
			y--;
		}
		ellipseplotPoints（x0?y0?x?y）;
	}
}
void?mymouse（int?button?int?state?int?x?int?y）{
	
		if?（state?==?GLUT_UP）{
			if?（count?==?0）{
				xStart?=?x-300;
				yStart?=?300?-?y;
				draw_pixel（xStart?yStart）;
				printf（“圓心坐標為%d?%d?\n“?xStart?yStart）;
				count++;
			}
			else?if?（count?==?1）{
				xEnd?=?x-300;
				yEnd?=?300?-?y;
				printf（“另一點坐標為%d?%d?\n“?xEnd?yEnd）;
				R?=?sqrt（（float）（abs（yEnd?-?yStart）*abs（yEnd?-?yStart））?+?（float）（abs（xEnd?-?xStart）*abs（

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????43008??2018-04-10?20:27??DrawYuan2\Debug\DrawYuan2.exe

?????文件?????468556??2018-04-10?20:27??DrawYuan2\Debug\DrawYuan2.ilk

?????文件?????961536??2018-04-10?20:27??DrawYuan2\Debug\DrawYuan2.pdb

?????文件???????2224??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.log

?????文件??????23375??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.obj

?????文件????????618??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\cl.command.1.tlog

?????文件??????29472??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\CL.read.1.tlog

?????文件????????416??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\CL.write.1.tlog

?????文件????????175??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\DrawYuan2.lastbuildstate

?????文件???????1086??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\link.command.1.tlog

?????文件???????2966??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\link.read.1.tlog

?????文件????????384??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog\link.write.1.tlog

?????文件?????338944??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\vc120.idb

?????文件?????339968??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\vc120.pdb

?????文件???????4667??2018-04-10?20:27??DrawYuan2\DrawYuan2\DrawYuan2.cpp

?????文件???????4025??2018-04-09?19:09??DrawYuan2\DrawYuan2\DrawYuan2.vcxproj

?????文件????????950??2018-04-09?19:09??DrawYuan2\DrawYuan2\DrawYuan2.vcxproj.filters

?????文件???35979264??2018-04-24?20:58??DrawYuan2\DrawYuan2.sdf

?????文件????????973??2018-04-09?19:04??DrawYuan2\DrawYuan2.sln

????..A..H.?????20480??2018-04-24?20:58??DrawYuan2\DrawYuan2.v12.suo

?????目錄??????????0??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug\DrawYuan2.tlog

?????目錄??????????0??2018-04-10?20:27??DrawYuan2\DrawYuan2\Debug

?????目錄??????????0??2018-04-09?23:50??DrawYuan2\Debug

?????目錄??????????0??2018-04-10?20:27??DrawYuan2\DrawYuan2

?????目錄??????????0??2018-04-24?20:58??DrawYuan2

-----------?---------??----------?-----??----

?????????????38223087????????????????????25