int BLI_convexhull_2d(const float(*points)[2], int n, int r_points[])
float BLI_convexhull_aabb_fit_points_2d(const float(*points)[2], unsigned int n)
int BLI_convexhull_2d_sorted(const float(*points)[2], int n, int r_points[])
float BLI_convexhull_aabb_fit_hull_2d(const float(*points_hull)[2], unsigned int n)