// vypocita prusecik dvou primek ktere jsou definovane pocatecnim a koncovym bodem
// vraci true pokud nejsou primky rovnobezne nebo prusecik lezi v definovane oblesti podle eStatus
public static bool CrossAbs(Point a1, CrossStatus sa1, Point a2, CrossStatus sa2,
Point b1, CrossStatus sb1, Point b2, CrossStatus sb2,
out Point retPt) // vraci absolutni souradnice pruseciku
{
Vector da = a2.Minus(a1),
db = b2.Minus(b1);
return(CrossAbs(a1, sa1, da, sa2, b1, sb1, db, sb2, out retPt));
}
public static bool TestRelOnLine(CrossStatus begin, CrossStatus end, double t)
{
if (!testRelBeginPt(begin, t))
{
return(false);
}
if (!testRelEndPt(end, t))
{
return(false);
}
return(true);
}
// vypocita prusecik dvou primek ktere jsou definovane pocatecnim bodem 'pxx' a usekem 'sxx'
// vraci true pokud nejsou primky rovnobezne nebo prusecik lezi v definovane oblesti podle eStatus
// priklad : primka - (eStatus.Infinite , eStatus.Infinite}
// usecka vcetne pocatecniho bodu a bez koncoveho bodu - (eStatus.And , eStatus.Not}
public static bool CrossAbs(Point p11, CrossStatus s11, Vector p12, CrossStatus s12,
Point p21, CrossStatus s21, Vector p22, CrossStatus s22,
out Point retPt) // vraci absolutni souradnice pruseciku
{
retPt = new Point();
if (!CrossRel(p11, p12, p21, p22, out Point u))
{
return(false);
}
if (!TestRelOnLine(s11, s12, u.X))
{
return(false);
}
if (!TestRelOnLine(s21, s22, u.Y))
{
return(false);
}
retPt.X = p11.X + (u.X * p12.X);
retPt.Y = p11.Y + (u.X * p12.Y);
return(true);
}
private static bool testRelEndPt(CrossStatus st, double t)
{
switch (st)
{
case CrossStatus.Infinite: break;
case CrossStatus.And: if (!(t < 1 || Funcs2D.IsEqual(t, 1.0, Funcs2D.Epson)))
{
return(false);
}
break;
case CrossStatus.Not: if (Funcs2D.IsEqual(t, 1.0, Funcs2D.Epson))
{
return(false);
}
if (!(t < 1))
{
return(false);
}
break;
}
return(true);
}
public static bool CrossAbs(Point a1, Point a2,
Point b1, Point b2,
CrossStatus sall, out Point retPt) // vraci absolutni souradnice pruseciku
{
return(CrossAbs(a1, sall, a2, sall, b1, sall, b2, sall, out retPt));
}
public static bool CrossAbs(Point p11, Vector p12,
Point p21, Vector p22,
CrossStatus sall, out Point retPt) // vraci absolutni souradnice pruseciku
{
return(CrossAbs(p11, sall, p12, sall, p21, sall, p22, sall, out retPt));
}
public static bool TestRelOnLine(CrossStatus both, double t)
{
return(TestRelOnLine(both, both, t));
}
