应该是这个吧
// Used by the traceresult() native.
enum
{
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
};