TR_AllSolid,		// (int) if true, plane is not valid

TR_StartSolid,		// (int) if true, the initial point was in a solid area

TR_InOpen,		// (int)

TR_InWater,		// (int)

TR_Fraction,		// (float) time completed, 1.0 = didn't hit anything

TR_EndPos,		// (vector) final position

TR_PlaneDist,		// (float)

TR_PlaneNormal,		// (vector) surface normal at impact

TR_Hit,			// (entity) entity the surface is on

TR_Hitgroup		// (int) 0 == generic, non zero is specific body part