public abstract void DrawEllipse(Graphics g, Ellipse ellipse);
public override void DrawEllipse(Graphics g, Ellipse ellipse)
{
PenDraw.Color = ellipse.PenColor; PenDraw.Width = ellipse.StrokeWidth;
int x = ellipse.Center.X; int y = ellipse.Center.Y;
int rX = ellipse.RadiusX; int rY = ellipse.RadiusY;
int currentX = 0;
int currentY = rY;
int currentcheckvalue = rY * rY - rX * rX * rY + 1 / 4 * rX * rX;
while (2 * rY * rY * currentX < 2 * rX * rX * currentY)
{
SetPixel2Ellipse(g, currentX, currentY, x, y);
if (currentcheckvalue < 0)
currentcheckvalue += rY * rY * (2 * currentX + 3);
else
{
currentcheckvalue += rY * rY * (2 * currentX + 3) - 2 * rX * rX * (currentY - 1);
currentY--;
}
currentX++;
}
currentcheckvalue = rY * rY * (currentX + 1 / 2) * (currentX + 1 / 2) + rX * rX * (currentY - 1) * (currentY - 1) - rX * rX * rY * rY;
while (currentY != 0)
{
SetPixel2Ellipse(g, currentX, currentY, x, y);
if (currentcheckvalue > 0)
currentcheckvalue += - rX * rX * (2 * currentY - 3);
else
{
currentcheckvalue += 2 * rY * rY * (currentX + 1) - rX * rX * (2 * currentY - 3);
currentX++;
}
currentY--;
}
}
public override void DrawEllipse(Graphics g, Ellipse ellipse)
{
}