379     f32                     f1, vx,vy ;  in KPADCalibrateDPD()  local
388     vx = kp->hard_acc.x ;  in KPADCalibrateDPD()
390     f1 = sqrtf( vx * vx + vy * vy ) ;  in KPADCalibrateDPD()
392     kp->accXY_nrm_hori.x = vx / f1 ;  in KPADCalibrateDPD()
425     vx = kp->kobj_regular[KPAD_USE_OBJECTS-1].center.x - kp->kobj_regular[0].center.x ;  in KPADCalibrateDPD()
427     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in KPADCalibrateDPD()
428     kp->sec_nrm_hori.x = vx * f1 ;  in KPADCalibrateDPD()
684     f32             f1, vx,vy, ax,ay ;  in calc_acc_horizon()  local
700     vx = kp->accXY_nrm_hori.x * ax + kp->accXY_nrm_hori.y * ay ;  in calc_acc_horizon()
704     ax = ( vx - kp->acc_horizon.x ) * f1 + kp->acc_horizon.x ;  in calc_acc_horizon()
718     vx = kp->acc_horizon.x - kp->ah_circle_pos.x ;  in calc_acc_horizon()
720     if ( vx*vx + vy*vy <= kp_ah_circle_radius2 ) {  in calc_acc_horizon()
983     f32             f1, vx,vy ;  in calc_horizon()  local
986     vx = p2->x - p1->x ;  in calc_horizon()
988     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not be zero  in calc_horizon()
989     vx *= f1 ;  in calc_horizon()
992     hori->x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_horizon()
993     hori->y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_horizon()
1057     f32             f1,f2, vx,vy, min = 2.0f ;  in select_2obj_continue()  local
1070             vx = op2->center.x - op1->center.x ;  in select_2obj_continue()
1072             f1 = 1.0f / sqrtf( vx*vx + vy*vy ) ;    // Should not be zero  in select_2obj_continue()
1073             nrm.x = vx * f1 ;  in select_2obj_continue()
1132     f32             vx,vy ;  in select_1obj_first()  local
1137     vx = kp->sec_nrm_hori.x * kp->acc_horizon.x + kp->sec_nrm_hori.y * kp->acc_horizon.y ;  in select_1obj_first()
1141     vx *= kp->trust_sec_length ;  in select_1obj_first()
1149         p1.x = op1->center.x - vx ;     // Expected point to the left  in select_1obj_first()
1151         p2.x = op1->center.x + vx ;     // Expected point to the right  in select_1obj_first()
1195     f32             f1, vx,vy ;  in select_1obj_continue()  local
1209             vx = op1->center.x - op2->center.x ;  in select_1obj_continue()
1211             f1 = vx * vx + vy * vy ;  in select_1obj_continue()
1230     vx = kp->sec_length * kp->sec_nrm.x ;  in select_1obj_continue()
1233         kp->kobj_regular[1].center.x = rp1->center.x + vx ;  in select_1obj_continue()
1238         kp->kobj_regular[0].center.x = rp1->center.x - vx ;  in select_1obj_continue()
1257     f32             f1, vx,vy ;  in calc_obj_horizon()  local
1260     vx = kp->kobj_regular[1].center.x - kp->kobj_regular[0].center.x ;  in calc_obj_horizon()
1262     kp->sec_length = sqrtf( vx * vx + vy * vy ) ;   // Should not be zero  in calc_obj_horizon()
1267     kp->sec_nrm.x = ( vx *= f1 ) ;  in calc_obj_horizon()
1270     kp->obj_horizon.x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_obj_horizon()
1271     kp->obj_horizon.y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_obj_horizon()