TEveVector
Dump to stdout as "(x, y, z; t)\n".
{ fX *= s; fY *= s; fZ *= s; return *this; }
{ fX += v.fX; fY += v.fY; fZ += v.fZ; return *this; }
{ fX -= v.fX; fY -= v.fY; fZ -= v.fZ; return *this; }