private int eventCompare(bool p1_isStart, ref Vector2 p1_1, ref Vector2 p1_2, bool p2_isStart, ref Vector2 p2_1, ref Vector2 p2_2)
{
// compare the selected points first
var comp = Epsilon.pointsCompare(p1_1, p2_1);
if (comp != 0)
{
return(comp);
}
// the selected points are the same
if (Epsilon.pointsSame(p1_2, p2_2)) // if the non-selected points are the same too...
{
return(0); // then the segments are equal
}
if (p1_isStart != p2_isStart) // if one is a start and the other isn't...
{
return(p1_isStart ? 1 : -1); // favor the one that isn't the start
}
// otherwise, we'll have to calculate which one is below the other manually
return(Epsilon.pointAboveOrOnLine(
p1_2,
p2_isStart ? p2_1 : p2_2, // order matters
p2_isStart ? p2_2 : p2_1
) ? 1 : -1);
}
private int statusCompare(EventNode ev1, EventNode ev2)
{
var a1 = ev1.seg.start;
var a2 = ev1.seg.end;
var b1 = ev2.seg.start;
var b2 = ev2.seg.end;
if (Epsilon.pointsCollinear(a1, b1, b2))
{
if (Epsilon.pointsCollinear(a2, b1, b2))
{
return(1); //eventCompare(true, a1, a2, true, b1, b2);
}
return(Epsilon.pointAboveOrOnLine(a2, b1, b2) ? 1 : -1);
}
return(Epsilon.pointAboveOrOnLine(a1, b1, b2) ? 1 : -1);
}
