private Shape BuildShape(Segment seg, int colorId)
{
Shape shape = (Shape)Activator.CreateInstance(Parameters.ShapeType);
double radio = Parameters.ColorRadio[colorId];
Point c = seg.CenterPoint();
double x = c.X * Parameters.XRate;
double y = (this.CavHeight + Exp.MaxY * Parameters.YRate) / 2 - c.Y * Parameters.YRate;
shape.Margin = new Thickness(x - radio, CavHeight - y - radio, 0, 0);
shape.Fill = Parameters.ColorList[colorId];
shape.Width = shape.Height = radio * 2;
return shape;
}
