//------------------------------------------------------------------------------
internal static bool SlopesEqual(ClipperTEdge e1, ClipperTEdge e2, bool UseFullRange)
{
if (UseFullRange)
{
return(ClipperInt128.Int128Mul(e1.Delta.Y, e2.Delta.X) ==
ClipperInt128.Int128Mul(e1.Delta.X, e2.Delta.Y));
}
else
{
return((long)(e1.Delta.Y) * (e2.Delta.X) ==
(long)(e1.Delta.X) * (e2.Delta.Y));
}
}
//------------------------------------------------------------------------------
internal static bool SlopesEqual(ClipperIntPoint pt1, ClipperIntPoint pt2,
ClipperIntPoint pt3, ClipperIntPoint pt4, bool UseFullRange)
{
if (UseFullRange)
{
return(ClipperInt128.Int128Mul(pt1.Y - pt2.Y, pt3.X - pt4.X) ==
ClipperInt128.Int128Mul(pt1.X - pt2.X, pt3.Y - pt4.Y));
}
else
{
return
((pt1.Y - pt2.Y) * (pt3.X - pt4.X) - (pt1.X - pt2.X) * (pt3.Y - pt4.Y) == 0);
}
}
//------------------------------------------------------------------------------
internal bool PointOnLineSegment(ClipperIntPoint pt,
ClipperIntPoint linePt1, ClipperIntPoint linePt2, bool UseFullRange)
{
if (UseFullRange)
{
return(((pt.X == linePt1.X) && (pt.Y == linePt1.Y)) ||
((pt.X == linePt2.X) && (pt.Y == linePt2.Y)) ||
(((pt.X > linePt1.X) == (pt.X < linePt2.X)) &&
((pt.Y > linePt1.Y) == (pt.Y < linePt2.Y)) &&
((ClipperInt128.Int128Mul((pt.X - linePt1.X), (linePt2.Y - linePt1.Y)) ==
ClipperInt128.Int128Mul((linePt2.X - linePt1.X), (pt.Y - linePt1.Y))))));
}
else
{
return(((pt.X == linePt1.X) && (pt.Y == linePt1.Y)) ||
((pt.X == linePt2.X) && (pt.Y == linePt2.Y)) ||
(((pt.X > linePt1.X) == (pt.X < linePt2.X)) &&
((pt.Y > linePt1.Y) == (pt.Y < linePt2.Y)) &&
((pt.X - linePt1.X) * (linePt2.Y - linePt1.Y) ==
(linePt2.X - linePt1.X) * (pt.Y - linePt1.Y))));
}
}