Triangulation gives an unexpected (wrong?) result

[BasTossings]

Ok so I'm working with the C-bindings, and trying to triangulate a polygon using manifold_triangulate which I suspect internally calls TriangulateIdx.

I'm inputting a concave polygon with the following vertices:

Index	X	Y
0	93747.453125	463835.53125
1	93742.6796875	463835.65625
2	93742.71875	463835.78125
3	93743.65625	463838.71875
4	93745.3125	463838.65625
5	93748.1171875	463838.5625
6	93748.109375	463838.5
7	93747.9375	463835.71875
8	93747.9921875	463835.21875
9	93747.453125	463835.53125

Using the following (pseudo-code) sequence:

var poly = manifold_simple_polygon ( <vertices mentioned above> );
var polygons = manifold_polygons ( poly );
var triangulation = manifold_triangulate ( polygons, 1e-6 );

But when I look at the output, it is not a valid triangulated polygon (the expected result is only an approximation but it illustrates the problem):

What gives? Am I using the API wrong?

[BasTossings]

Ah, I found my answer. The polygon was not CCW. Lesson learned.