public bool AddValidPoint(MyPoint p)
{
if (Points.Count < 2)
{
Points.Add(p);
if (Points.Count == 2)
{
double rise = Points[1].Y - Points[0].Y;
double run = Points[1].X - Points[0].X;
if (run != 0.0)
{
m = rise / run;
c = Points[0].Y - m * Points[0].X;
}
else
{
isVert = true;
}
}
return true;
}
else
{
return AddCollinearPoint(p);
}
}
private bool AddCollinearPoint(MyPoint p)
{
if (this.PassesThroughPoint(p))
{
Points.Add(p);
return true;
}
return false;
}
private bool PassesThroughPoint(MyPoint p)
{
if (isVert)
{
return p.X == Points[0].X;
}
else
{
return p.Y == m * p.X + c;
}
}
public bool HasPoint(MyPoint p)
{
int nPoint = this.Points.Count;
for (int i = 0; i < nPoint; i++)
{
if (this.Points[i].Equals(p))
{
return true;
}
}
return false;
}