public bool IsCoincidesWith(StraightLineEquation other)
{
var fb = -(A / B);
var sb = -(other.A / other.B);
return(fb * sb > 0 && C * other.B == other.C * B);
}
private Point GetIntersectPoint(StraightLineEquation f, StraightLineEquation s)
{ // TODO HELP ME
var x = (f.B * s.C - s.B * f.C) / (f.A * s.B - s.A * f.B);
var y = (s.A * f.C - f.A * s.C) / (f.A * s.B - s.A * f.B);
return(new Point(x, y));
}
private bool IsIntersect(Vector fs, Vector fe, Vector ss, Vector se)
{ // TODO HELP ME
var firstLine = new StraightLineEquation(fs, fe);
var secondLine = new StraightLineEquation(ss, se);
if (firstLine.A == 0 && secondLine.A == 0 || firstLine.B == 0 && secondLine.B == 0)
{
return(firstLine.IsCoincidesWith(secondLine));
}
var point = GetIntersectPoint(firstLine, secondLine);
return(point.IsBetween(fs.ToPoint(), fe.ToPoint()) &&
point.IsBetween(ss.ToPoint(), se.ToPoint()));
}