赋值查找

static inline void CLARKE_run(CLARKE_Handle handle,const MATH_vec3 *pInVec,MATH_vec2 *pOutVec)
{
  CLARKE_Obj *obj = (CLARKE_Obj *)handle;

  uint_least8_t numSensors = obj->numSensors;

  _iq alpha_sf = obj->alpha_sf;
  _iq beta_sf = obj->beta_sf;

  if(numSensors == 3)
    {
      pOutVec->value[0] = _IQmpy(lshft_1(pInVec->value[0]) - (pInVec->value[1] + pInVec->value[2]),alpha_sf);
      pOutVec->value[1] = _IQmpy(pInVec->value[1] - pInVec->value[2],beta_sf);
    }
  else if(numSensors == 2)
    {
      pOutVec->value[0] = _IQmpy(pInVec->value[0],alpha_sf);
      pOutVec->value[1] = _IQmpy(pInVec->value[0] + lshft_1(pInVec->value[1]),beta_sf);
    }

  return;
} // end of CLARKE_run() function

我怎样 才能 查到 obj->beta_sf;在什么地方赋值的？