// Faster than the function above due to the use of S1ChordAngle.
public static S2Point GetPointToRight(S2Point a, S2Point b, S1ChordAngle r)
{
return(GetPointOnRay(a, S2.RobustCrossProd(b, a).Normalize(), r));
}
// Returns true if the minimum distance from X to the edge AB is attained at
// an interior point of AB (i.e., not an endpoint), and that distance is less
// than "limit". (Specify limit.Successor() for "less than or equal to".)
public static bool IsInteriorDistanceLess(S2Point x, S2Point a, S2Point b, S1ChordAngle limit)
{
return(UpdateMinInteriorDistance(x, a, b, ref limit));
}
// If the minimum distance from X to AB is attained at an interior point of AB
// (i.e., not an endpoint), and that distance is less than "min_dist", then
// this method updates "min_dist" and returns true. Otherwise returns false.
public static bool UpdateMinInteriorDistance(S2Point x, S2Point a, S2Point b, ref S1ChordAngle min_dist)
{
double xa2 = (x - a).Norm2(), xb2 = (x - b).Norm2();
return(AlwaysUpdateMinInteriorDistance(x, a, b, xa2, xb2, ref min_dist, false));
}
public void Test_S1ChordAngle_Negative()
{
Assert.True(S1ChordAngle.Negative < S1ChordAngle.Zero);
Assert.True(S1ChordAngle.Negative == S1ChordAngle.FromLength2(-1));
Assert.True(S1ChordAngle.Negative.ToAngle() < S1Angle.Zero);
}
