OEGeom2DSubtract

template<class T>
void OEGeom2DSubtract(T* x, const T* p)
template<class T>
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 \(x = p - q\).