var prodVect = function(e,g) { var nx=e.getY3D()*g.getZ3D()- e.getZ3D()*g.getY3D(); var ny=e.getZ3D()*g.getX3D()- e.getX3D()*g.getZ3D(); var nz=e.getX3D()*g.getY3D()- e.getY3D()*g.getX3D(); return Point3D(nx,ny,nz); };