490     f32                     f1, vx,vy ;  in KPADCalibrateDPD()  local
500     vy = kp->hard_acc.y ;  in KPADCalibrateDPD()
501     f1 = sqrtf( vx * vx + vy * vy ) ;  in KPADCalibrateDPD()
504     kp->accXY_nrm_hori.y = vy / f1 ;  in KPADCalibrateDPD()
537     vy = kp->kobj_regular[ KPAD_USE_OBJECTS - 1 ].center.y - kp->kobj_regular[ 0 ].center.y ;  in KPADCalibrateDPD()
538     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in KPADCalibrateDPD()
540     kp->sec_nrm_hori.y = vy * f1 ;  in KPADCalibrateDPD()
773     f32             f1, vx,vy, ax,ay ;  in calc_acc_horizon()  local
790     vy = kp->accXY_nrm_hori.y * ax - kp->accXY_nrm_hori.x * ay ;  in calc_acc_horizon()
794     ay = ( vy - kp->acc_horizon.y ) * f1 + kp->acc_horizon.y ;  in calc_acc_horizon()
808     vy = kp->acc_horizon.y - kp->ah_circle_pos.y ;  in calc_acc_horizon()
809     if ( vx*vx + vy*vy <= kp->ah_circle_radius2 ) {  in calc_acc_horizon()
1020     f32             f1, vx,vy ;  in calc_horizon()  local
1024     vy = p2->y - p1->y ;  in calc_horizon()
1025     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in calc_horizon()
1027     vy *= f1 ;  in calc_horizon()
1029     hori->x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_horizon()
1030     hori->y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_horizon()
1094     f32             f1,f2, vx,vy, min = 2.0f ;  in select_2obj_continue()  local
1108             vy = op2->center.y - op1->center.y ;  in select_2obj_continue()
1109             f1 = 1.0f / sqrtf( vx*vx + vy*vy ) ;    // Should not be zero.  in select_2obj_continue()
1111             nrm.y = vy * f1 ;  in select_2obj_continue()
1169     f32             vx,vy ;  in select_1obj_first()  local
1175     vy = kp->sec_nrm_hori.y * kp->acc_horizon.x - kp->sec_nrm_hori.x * kp->acc_horizon.y ;  in select_1obj_first()
1179     vy *= kp->trust_sec_length ;  in select_1obj_first()
1187         p1.y = op1->center.y - vy ;  in select_1obj_first()
1189         p2.y = op1->center.y + vy ;  in select_1obj_first()
1232     f32             f1, vx,vy ;  in select_1obj_continue()  local
1247             vy = op1->center.y - op2->center.y ;  in select_1obj_continue()
1248             f1 = vx * vx + vy * vy ;  in select_1obj_continue()
1268     vy = kp->sec_length * kp->sec_nrm.y ;  in select_1obj_continue()
1271         kp->kobj_regular[ 1 ].center.y = rp1->center.y + vy ;  in select_1obj_continue()
1276         kp->kobj_regular[ 0 ].center.y = rp1->center.y - vy ;  in select_1obj_continue()
1294     f32             f1, vx,vy ;  in calc_obj_horizon()  local
1298     vy = kp->kobj_regular[ 1 ].center.y - kp->kobj_regular[ 0 ].center.y ;  in calc_obj_horizon()
1299     kp->sec_length = sqrtf( vx * vx + vy * vy ) ;   // Should not be zero  in calc_obj_horizon()
1305     kp->sec_nrm.y = ( vy *= f1 ) ;  in calc_obj_horizon()
1307     kp->obj_horizon.x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_obj_horizon()
1308     kp->obj_horizon.y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_obj_horizon()