clockwise triangles order

[easy]

Hi,
Is there a possible to receive triangles in clockwise order?
i'm using unity and the result polygon i get is not seen until i rotate the plane in 180 degree along the Y Axis.
( i also want to avoid to fix this problem by manually rotate the plane )

help please

[A Lynch]

For each triangle output by poly2tri, change the order of the vertices by simply swapping two vertices. This will cause each triangle's normal to point in the opposite direction.