I am translating an input that describes zones by mixing segments and arcs. Arcs are given by a center, 2 points (beginning/end of arc) and a direction (CW or CCW). In a first prototypes using GDAL, I inspected once how the points were sorted after the call to .buffer() and made the assumption that they will always be in the same direction. Then I moved my code to shapely, and it looks like the direction used is not the same, so I'm back to inspecting and hardcoding the internal direction.
But my guess is that this is not the correct way of dealing with circle direction. Should I check after every calls to .buffer() the direction in which the points are ordered ? If so, is there a well known method to compute the direction ?