public void Draw(Surface screen)
{
double Pi2 = 2 * Math.PI;
for (double theta = 0, dtheta = 0.0001f; theta < Pi2; theta += dtheta)
{
float x = Center.X + Radius * (float)Math.Cos(theta),
y = Center.Y + Radius * (float)Math.Sin(theta);
int tx = (int)Math.Round((x + 1) / 2 * screen.width);
int ty = (int)Math.Round((-y + 1) / 2 * screen.height);
if (x * x + y * y <= 1)
{
screen.pixels[tx + ty * screen.width] = MyApplication.MixColor(new Vector3(255, 0, 0));
}
}
}