public bool IsRightOf(LineFr line)
{
if (line.Contains(this))
{
return(false);
}
if (line.IsHorizontal())
{
return(Y < line.YIntercept());
}
if (line.IsVertical())
{
return(X > line.XIntercept());
}
var linePointNullable = line.Intersection(LineFr.Vertical(Fraction.Zero));
if (linePointNullable == null)
{
throw new ArgumentException("Wartość linePoint nie może wynosić null");
}
var linePoint = (PointFr)linePointNullable;
var temp = new LineFr(this, linePoint);
if (Y < linePoint.Y)
{
if (line.Slope < 0) // a
{
return(temp.Slope < 0 && temp.Slope > line.Slope);
}
return(temp.Slope < 0 || temp.Slope > line.Slope); // b
}
if (Y > linePoint.Y)
{
if (line.Slope < 0) // c
{
return(temp.Slope >= 0 || temp.Slope < line.Slope);
}
return(temp.Slope >= 0 && temp.Slope < line.Slope); // d
}
return(IsRightOf(linePoint)); // 'this' ma taką samą współrzędną y jak 'linePoint'
}
public bool IsLeftOf(LineFr line)
{
return(!line.Contains(this) && !IsRightOf(line));
}
