458     f32                     f1, vx,vy ;  in KPADCalibrateDPD()  local
468     vy = kp->hard_acc.y ;  in KPADCalibrateDPD()
469     f1 = sqrtf( vx * vx + vy * vy ) ;  in KPADCalibrateDPD()
472     kp->accXY_nrm_hori.y = vy / f1 ;  in KPADCalibrateDPD()
505     vy = kp->kobj_regular[ KPAD_USE_OBJECTS - 1 ].center.y - kp->kobj_regular[ 0 ].center.y ;  in KPADCalibrateDPD()
506     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in KPADCalibrateDPD()
508     kp->sec_nrm_hori.y = vy * f1 ;  in KPADCalibrateDPD()
720     f32             f1, vx,vy, ax,ay ;  in calc_acc_horizon()  local
737     vy = kp->accXY_nrm_hori.y * ax - kp->accXY_nrm_hori.x * ay ;  in calc_acc_horizon()
741     ay = ( vy - kp->acc_horizon.y ) * f1 + kp->acc_horizon.y ;  in calc_acc_horizon()
755     vy = kp->acc_horizon.y - kp->ah_circle_pos.y ;  in calc_acc_horizon()
756     if ( vx*vx + vy*vy <= kp->ah_circle_radius2 ) {  in calc_acc_horizon()
966     f32             f1, vx,vy ;  in calc_horizon()  local
970     vy = p2->y - p1->y ;  in calc_horizon()
971     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in calc_horizon()
973     vy *= f1 ;  in calc_horizon()
975     hori->x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_horizon()
976     hori->y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_horizon()
1040     f32             f1,f2, vx,vy, min = 2.0f ;  in select_2obj_continue()  local
1054             vy = op2->center.y - op1->center.y ;  in select_2obj_continue()
1055             f1 = 1.0f / sqrtf( vx*vx + vy*vy ) ;    // Should not be zero  in select_2obj_continue()
1057             nrm.y = vy * f1 ;  in select_2obj_continue()
1115     f32             vx,vy ;  in select_1obj_first()  local
1121     vy = kp->sec_nrm_hori.y * kp->acc_horizon.x - kp->sec_nrm_hori.x * kp->acc_horizon.y ;  in select_1obj_first()
1125     vy *= kp->trust_sec_length ;  in select_1obj_first()
1133         p1.y = op1->center.y - vy ;  in select_1obj_first()
1135         p2.y = op1->center.y + vy ;  in select_1obj_first()
1178     f32             f1, vx,vy ;  in select_1obj_continue()  local
1193             vy = op1->center.y - op2->center.y ;  in select_1obj_continue()
1194             f1 = vx * vx + vy * vy ;  in select_1obj_continue()
1214     vy = kp->sec_length * kp->sec_nrm.y ;  in select_1obj_continue()
1217         kp->kobj_regular[ 1 ].center.y = rp1->center.y + vy ;  in select_1obj_continue()
1222         kp->kobj_regular[ 0 ].center.y = rp1->center.y - vy ;  in select_1obj_continue()
1240     f32             f1, vx,vy ;  in calc_obj_horizon()  local
1244     vy = kp->kobj_regular[ 1 ].center.y - kp->kobj_regular[ 0 ].center.y ;  in calc_obj_horizon()
1245     kp->sec_length = sqrtf( vx * vx + vy * vy ) ;   // Should not be zero  in calc_obj_horizon()
1251     kp->sec_nrm.y = ( vy *= f1 ) ;  in calc_obj_horizon()
1253     kp->obj_horizon.x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_obj_horizon()
1254     kp->obj_horizon.y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_obj_horizon()