public override bool IsExisting()
{
var points = GetPoints();
// Checking for repeating points
for (int i = 0; i < points.Length; i++)
{
for (int j = 0; j < points.Length; j++)
{
if (i != j && GeometryMath.IsPointsEqual(points[i], points[j]))
{
return(false);
}
}
}
// Checking for self-intersections;
for (int i = 0; i < points.Length; i++)
{
for (int j = 0; j < points.Length; j++)
{
var a = new LineSegment(points[i], points[(i + 1) % points.Length]);
var b = new LineSegment(points[j], points[(j + 1) % points.Length]);
if (i != j && GeometryMath.IsIntersected(a, b))
{
return(false);
}
}
}
return(true);
}