458     f32                     f1, vx,vy ;  in KPADCalibrateDPD()  local
467     vx = kp->hard_acc.x ;  in KPADCalibrateDPD()
469     f1 = sqrtf( vx * vx + vy * vy ) ;  in KPADCalibrateDPD()
471     kp->accXY_nrm_hori.x = vx / f1 ;  in KPADCalibrateDPD()
504     vx = kp->kobj_regular[ KPAD_USE_OBJECTS - 1 ].center.x - kp->kobj_regular[ 0 ].center.x ;  in KPADCalibrateDPD()
506     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in KPADCalibrateDPD()
507     kp->sec_nrm_hori.x = vx * f1 ;  in KPADCalibrateDPD()
720     f32             f1, vx,vy, ax,ay ;  in calc_acc_horizon()  local
736     vx = kp->accXY_nrm_hori.x * ax + kp->accXY_nrm_hori.y * ay ;  in calc_acc_horizon()
740     ax = ( vx - kp->acc_horizon.x ) * f1 + kp->acc_horizon.x ;  in calc_acc_horizon()
754     vx = kp->acc_horizon.x - kp->ah_circle_pos.x ;  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
969     vx = p2->x - p1->x ;  in calc_horizon()
971     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in calc_horizon()
972     vx *= 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
1053             vx = op2->center.x - op1->center.x ;  in select_2obj_continue()
1055             f1 = 1.0f / sqrtf( vx*vx + vy*vy ) ;    // Should not be zero  in select_2obj_continue()
1056             nrm.x = vx * f1 ;  in select_2obj_continue()
1115     f32             vx,vy ;  in select_1obj_first()  local
1120     vx = kp->sec_nrm_hori.x * kp->acc_horizon.x + kp->sec_nrm_hori.y * kp->acc_horizon.y ;  in select_1obj_first()
1124     vx *= kp->trust_sec_length ;  in select_1obj_first()
1132         p1.x = op1->center.x - vx ;     // Expected point to the left  in select_1obj_first()
1134         p2.x = op1->center.x + vx ;     // Expected point to the right  in select_1obj_first()
1178     f32             f1, vx,vy ;  in select_1obj_continue()  local
1192             vx = op1->center.x - op2->center.x ;  in select_1obj_continue()
1194             f1 = vx * vx + vy * vy ;  in select_1obj_continue()
1213     vx = kp->sec_length * kp->sec_nrm.x ;  in select_1obj_continue()
1216         kp->kobj_regular[ 1 ].center.x = rp1->center.x + vx ;  in select_1obj_continue()
1221         kp->kobj_regular[ 0 ].center.x = rp1->center.x - vx ;  in select_1obj_continue()
1240     f32             f1, vx,vy ;  in calc_obj_horizon()  local
1243     vx = kp->kobj_regular[ 1 ].center.x - kp->kobj_regular[ 0 ].center.x ;  in calc_obj_horizon()
1245     kp->sec_length = sqrtf( vx * vx + vy * vy ) ;   // Should not be zero  in calc_obj_horizon()
1250     kp->sec_nrm.x = ( vx *= 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()