public LineSegment(PointXY startPoint, PointXY endPoint)
{
if (startPoint.X < endPoint.X)
{
StartPoint = startPoint;
EndPoint = endPoint;
}
else if ((startPoint.X == endPoint.X) && (startPoint.Y < endPoint.Y))
{
StartPoint = startPoint;
EndPoint = endPoint;
}
else
{
StartPoint = endPoint;
EndPoint = startPoint;
}
// Case of line parallel to the y-axis
if (StartPoint.X == EndPoint.X)
{
EndPoint.X = endPoint.X + 1;
}
M = (EndPoint.Y - StartPoint.Y) / (EndPoint.X - StartPoint.X);
B = StartPoint.Y - (M * StartPoint.X);
// Length
Length = Math.Sqrt(Math.Pow(EndPoint.Y - StartPoint.Y, 2) + Math.Pow(EndPoint.X - StartPoint.X, 2));
}
public IntersectionPoint(LineSegment lineT, LineSegment lineV)
{
LineT = lineT;
LineV = lineV;
// Intersection Points
PointOfIntersection = new PointXY(0, 0);
PointOfIntersection.X = (lineV.B - lineT.B) / (lineT.M - lineV.M);
PointOfIntersection.Y = (lineT.M * PointOfIntersection.X) + lineT.B;
// Second and Penult
List <double> pointsX = new List <double> {
lineT.StartPoint.X, lineT.EndPoint.X, lineV.StartPoint.X, lineV.EndPoint.X
};
var pointsXinOrder = pointsX.OrderBy(x => x).ToList();
List <double> pointsY = new List <double> {
lineT.StartPoint.Y, lineT.EndPoint.Y, lineV.StartPoint.Y, lineV.EndPoint.Y
};
var pointsYinOrder = pointsY.OrderBy(y => y).ToList();
XSecond = pointsXinOrder[1];
YSecond = pointsYinOrder[1];
XPenult = pointsXinOrder[2];
YPenult = pointsYinOrder[2];
// Intersection
if ((PointOfIntersection.X > XSecond) && (PointOfIntersection.X < XPenult) && (PointOfIntersection.Y > YSecond) && (PointOfIntersection.Y < YPenult))
{
Intersection = true;
}
else
{
Intersection = false;
}
}
