limingcircle.h

自己编的程序大家下载一下很好的希望大家多多提出意见

#include "windows.h"
class limingcircle
{
public:
	void MidCircle(CDC*pDC,int xc,int yc,int r,int m_red,int m_green,int m_blue);
	void BresenhamCircle(CDC*pDC,int xc,int yc,int r,int m_red,int m_green,int m_blue);
};
void limingcircle::MidCircle(CDC *pDC,int xc,int yc,int r,int m_red,int m_green,int m_blue)
{
	int c=RGB(m_red,m_green,m_blue);
	int x,y;
	float d;
	x=0;
	y=r;
	d=1.25-r;
	pDC->SetPixel((xc+x),(yc+y),c);
	pDC->SetPixel((xc-x),(yc+y),c);
	pDC->SetPixel((xc+x),(yc-y),c);
	pDC->SetPixel((xc-x),(yc-y),c);
	pDC->SetPixel((xc+y),(yc+x),c);
	pDC->SetPixel((xc-y),(yc+x),c);
	pDC->SetPixel((xc+y),(yc-x),c);
	pDC->SetPixel((xc-y),(yc-x),c);
	while(x<=y)
	{
		if(d<0)
		{
			d+=2*x+3;
		}
		else
		{
			d+=2*(x-y)+5;
			y--;
		}
		x++;
		pDC->SetPixel((xc+x),(yc+y),c);
		pDC->SetPixel((xc-x),(yc+y),c);
		pDC->SetPixel((xc+x),(yc-y),c);
		pDC->SetPixel((xc-x),(yc-y),c);
		pDC->SetPixel((xc+y),(yc+x),c);
		pDC->SetPixel((xc-y),(yc+x),c);
		pDC->SetPixel((xc+y),(yc-x),c);
		pDC->SetPixel((xc-y),(yc-x),c);
	}
}

void limingcircle::BresenhamCircle(CDC *pDC,int xc,int yc,int r,int m_red,int m_green,int m_blue)
{
	int c=RGB(m_red,m_green,m_blue);
	int x=0,y=r,p=3-2*r;
	while(x<y)
	{
		pDC->SetPixel((xc+x),(yc+y),c);
		pDC->SetPixel((xc-x),(yc+y),c);
		pDC->SetPixel((xc+x),(yc-y),c);
		pDC->SetPixel((xc-x),(yc-y),c);
		pDC->SetPixel((xc+y),(yc+x),c);
		pDC->SetPixel((xc-y),(yc+x),c);
		pDC->SetPixel((xc+y),(yc-x),c);
		pDC->SetPixel((xc-y),(yc-x),c);
		if(p<0)
			p=p+4*x+6;
		else
		{
			p=p+4*(x-y)+10;
			y-=1;
		}
		x+=1;
	}
	if(x==y)
	{
		pDC->SetPixel((xc+x),(yc+y),c);
		pDC->SetPixel((xc-x),(yc+y),c);
		pDC->SetPixel((xc+x),(yc-y),c);
		pDC->SetPixel((xc-x),(yc-y),c);
		pDC->SetPixel((xc+y),(yc+x),c);
		pDC->SetPixel((xc-y),(yc+x),c);
		pDC->SetPixel((xc+y),(yc-x),c);
		pDC->SetPixel((xc-y),(yc-x),c);
	}
}