Circle drawing using Bresenham

Circle drawing using Bresenham algorithm with C++ MFC.

Code:

void CircleBresenham(HDC hdc,int xc,int yc, int R,COLORREF color)
{
int x=0,y=R;
int d=1-R;
Draw8Points(hdc,xc,yc,x,y,color);
while(x<y)
{
if(d<0)
d+=2*x+2;
else
{
d+=2*(x-y)+5;
y--;
}
x++;
Draw8Points(hdc,xc,yc,x,y,color);
}
} 

Code:

 
void Draw8Points(HDC hdc,int xc,int yc, int a, int b)
            {
                    SetPixel(hdc, xc+a, yc+b, NULL);
                    SetPixel(hdc, xc-a, yc+b, NULL);
                    SetPixel(hdc, xc-a, yc-b, NULL);
                    SetPixel(hdc, xc+a, yc-b, NULL);
                    SetPixel(hdc, xc+b, yc+a, NULL);
                    SetPixel(hdc, xc-b, yc+a, NULL);
                    SetPixel(hdc, xc-b, yc-a, NULL);
                    SetPixel(hdc, xc+b, yc-a, NULL);
          } 

_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
Mastermind

Posts: 2715
Have thanks: 74 time

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