Das sagt das Manual unter "Flags":
Quote:
In C, C++, or Lite-C, a flag is set at runtime by OR-ing the flags parameter with the flag (material.flags |= TANGENT;); it is reset by AND-ing the flags parameter with the inverse flag (material.flags &= ~TANGENT;); and it is read by AND-ing the flags parameter with the flag and comparing the result with zero.
Alternativ gibt es die makros set(PointerZumElement,FLAGS) und reset(PointerZumElement,FLAGS). Eine nähere Beschreibung von diesen findest du unter "Macros".
