private Point FindLineAndCircleInterception(Point c1, double r1, Point c2, Vertex.Tags tag, Point c3)
{
int x = 0, y = 0;
if (tag == Vertex.Tags.VerticalLine)
{
int dx = c2.X - c1.X;
if (Math.Abs(dx) > r1)
{
throw new IncompatibleTagsException();
}
int dy = (int)Math.Sqrt(r1 * r1 - dx * dx);
y = c3.Y > c1.Y ? c1.Y + dy : c1.Y - dy;
x = c2.X;
}
else if (tag == Vertex.Tags.HorizontalLine)
{
int dy = c2.Y - c1.Y;
if (Math.Abs(dy) > r1)
{
throw new IncompatibleTagsException();
}
int dx = (int)Math.Sqrt(r1 * r1 - dy * dy);
x = c3.X > c1.X ? c1.X + dx : c1.X - dx;
y = c2.Y;
}
return(new Point(x, y));
}
public bool IsTagged(int vertexBeforeIndex, Vertex.Tags tag)
{
if (Vertices[vertexBeforeIndex].Tag == tag)
{
return(true);
}
return(false);
}
