void drawCircle( int xCenter, int yCenter, int radius, COLOR fillColor )
{
int x = 0, y = radius, p = 1 - radius;
circlePlotPoints( xCenter, yCenter, x, y );
circleFillColor(xCenter, yCenter, x, y, fillColor);
while( x < y )
{
x++;
if( p < 0 )
{
p += (2 * x) + 1;
}
else
{
y--;
p += ( 2*(x-y) ) +1;
}
circlePlotPoints(xCenter, yCenter, x, y);
circleFillColor(xCenter, yCenter, x, y, fillColor);
}
//colorFill(xCenter, yCenter, fillColor);
}
void circleMidPoint(GLint xc, GLint yc, GLint radius)
{
screenPoint circlePoint;
//initialize value for midpoint parameter
GLint p = 1-radius;
//set coordinates for top point of circle
circlePoint.setCoordinates(0,radius);
//function prototype
void circlePlotPoints(GLint, GLint, screenPoint);
//plot the initial point in each quadrant
circlePlotPoints(xc, yc, circlePoint);
//calculate the next point and plot in each octant
while(circlePoint.getx() < circlePoint.gety())
{
circlePoint.incrementx();
if(p<0)
p += 2 * circlePoint.getx() + 1;
else{
circlePoint.decrementy ();
p += 2 * (circlePoint.getx () - circlePoint.gety ()) + 1;
}
circlePlotPoints(xc, yc, circlePoint);
}
}
