func (ushortComponent) PutMat4(b []byte, v [4][4]uint16) {
    binary.LittleEndian.PutUint16(b, v[0][0])
    binary.LittleEndian.PutUint16(b[2:], v[1][0])
    binary.LittleEndian.PutUint16(b[4:], v[2][0])
    binary.LittleEndian.PutUint16(b[6:], v[3][0])