orientation fails to identify points exactly on the line in some cases

[toddwagn]

julia> orientation(Line(Point(1.,1.), Point(1.8, 1.6)), Point(1.4, 1.3))
1

julia> orientation(Line(Point(1.,1.), Point(1.8, 1.6)), Point(1.4, prevfloat(1.3)))
-1

[skariel]

Hi!

Sorry for my late reply I saw this issue just now.

So the result is right, there is no problem at all here (you have to be VERY careful when dealing with numerics). Indeed Point(1.4,1.3) is to the left of the line and Point(1.4, prevfloat(1.3)) is to the right. The numerical line is not "continuous" in any way

In fact it is very hard to find points exactly on this line, see code and plot below: