fo (
ForwardIterator first
,
ForwardIterator last
)
determines the orientation of the points of the tuple
A = tuple [first,last) where A consists of d + 1 points in
d-space. This is the sign of the determinant
|
1
1
1
1
A[0]
A[1]
...
A[d]
|
where A[i] denotes the Cartesian coordinate vector of
the i-th point in A.
Precondition:
size [first,last) == d+1 and
A[i].dimension() == d 0 i d.
Requirement:
The value type of ForwardIterator is
Kernel::Point_d.
0 
i