Vector projection function

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

I didn't see anything like this in vtkMath, does it exist somewhere else? Or can this be added somewhere?

void Project(const double* A, const double* B, double* Projection) { //find the projection of A on B double scale = vtkMath::Dot(A,B)/pow(vtkMath::Norm(B), 2); for(unsigned int i = 0; i < 3; i++) Projection[i] = scale * B[i];
}