public TS_point Intersection(TS_line line2)
{
double a1 = SlopeA;
double b1 = InterceptB;
double a2 = line2.SlopeA;
double b2 = line2.InterceptB;
if (TS_point.TS_AreDoublesEqual(a1, a2))
{
return(new TS_point(Double.NaN, Double.NaN));
}
/*
* double x = (b1-b2)/(a2-a1);
* double y = (a2*b1 - b2*a1)/(a2-a1);
* return new TS_point(x,y);
*/
double A1 = GenA;
double A2 = line2.GenA;
double B1 = GenB;
double B2 = line2.GenB;
double C1 = GenC;
double C2 = line2.GenC;
double D1 = (B2 - B1) / (A1 - A2);
double D2 = (C2 - C1) / (A1 - A2);
double y = -(A1 * D2 + C1) / (A1 * D1 + B1);
double x = D1 * y + D2;
return(new TS_point(x, y));
}
public TS_side(TS_point StartPoint, TS_point EndPoint)
{
this.StartPoint = StartPoint;
this.EndPoint = EndPoint;
Line = new TS_line(StartPoint, EndPoint);
//ReCalcMe();
}
public bool IsCrossedWith(TS_line line2)
{
TS_point crossPoint = Intersection(line2);
if (Double.IsNaN(crossPoint.X) || Double.IsNaN(crossPoint.Y))
{
return(false);
}
return(true);
}
public TS_point CrossedPoint(TS_line line2)
{
TS_point point = Line.Intersection(line2);
if (IsContain(point))
{
return(point);
}
return(new TS_point());
}
public bool IsCrossedWith(TS_line line2)
{
if (Line.IsCrossedWith(line2))
{
TS_point crossPoint = Line.Intersection(line2);
if (IsContain(crossPoint))
{
return(true);
}
}
return(false);
}
public bool IsPointInside(TS_point point)
{
if (IsAVertex(point))
{
return(false);
}
foreach (var side in Sides)
{
if (side.IsContain(point))
{
return(false);
}
}
TS_line horLine = new TS_line(0, point.Y);
ObservableCollectionEx <TS_point> horPoints = new ObservableCollectionEx <TS_point>();
foreach (var side in Sides)
{
TS_point pointX = side.CrossedPoint(horLine);
if (pointX.X > point.X && !horPoints.Contains(pointX))
{
horPoints.Add(pointX);
}
}
int countH = horPoints.Count;
if (countH % 2 != 0)
{
return(true);
}
TS_line vertLine = new TS_line(1, 0, -point.X);
List <TS_point> vertPoints = new List <TS_point>();
foreach (var side in Sides)
{
TS_point pointY = side.CrossedPoint(vertLine);
if (pointY.Y > point.Y && !vertPoints.Contains(pointY))
{
vertPoints.Add(pointY);
}
}
int countV = vertPoints.Count;
if (countV % 2 != 0)
{
return(true);
}
TS_line horLineL = new TS_line(0, point.Y);
List <TS_point> horPointsL = new List <TS_point>();
foreach (var side in Sides)
{
TS_point pointX = side.CrossedPoint(horLineL);
if (pointX.X > point.X && !horPointsL.Contains(pointX))
{
horPointsL.Add(pointX);
}
}
int countHL = horPointsL.Count;
if (countHL % 2 != 0)
{
return(true);
}
List <TS_point> vertPointsD = new List <TS_point>();
foreach (var side in Sides)
{
TS_point pointY = side.CrossedPoint(vertLine);
if (pointY.Y > point.Y && !vertPointsD.Contains(pointY))
{
vertPointsD.Add(pointY);
}
}
int countVD = vertPointsD.Count;
if (countVD % 2 != 0)
{
return(true);
}
return(false);
}