14.9 OEGeom2DSubtract

template<class T>
static void OEGeom2DSubtract(T *x, const T *p)
template<class T>
static void OEGeom2DSubtract(T *x, const T *p, const T *q)

Two dimensional vector subtraction. The first form computes x-=p and the second form computes x = p - q.