computer graphics circle algorithm
void circleMidpoint (int xCenter, int yCenter, int radius)
{
int x = 0;
int y = radius;
int p = 1 - radius;
void circlePlotPoints (int, int, int, int);
/* Plot first set of points */
circlePlotPoints (xCenter, yCenter, x, y);
while (x < y)
{
x++ ;
if (p < 0)
p +=2*x +1;
else
{
y--;
p +=2* (x - Y) + 1;
}
circlePlotPoints(xCenter, yCenter, x, y)
}
}
void circlePlotPolnts (int xCenter, int yCenter, int x, int y)
{
setpixel (xCenter + x, yCenter + y ) ;
setpixel (xCenter - x. yCenter + y);
setpixel (xCenter + x, yCenter - y);
setpixel (xCenter - x, yCenter - y ) ;
setpixel (xCenter + y, yCenter + x);
setpixel (xCenter - y , yCenter + x);
setpixel (xCenter t y , yCenter - x);
setpixel (xCenter - y , yCenter - x);
}