334     f32                     f1, vx,vy ;  in KPADCalibrateDPD()  local
343     vx = kp->hard_acc.x ;  in KPADCalibrateDPD()
345     f1 = sqrtf( vx * vx + vy * vy ) ;  in KPADCalibrateDPD()
347     kp->accXY_nrm_hori.x = vx / f1 ;  in KPADCalibrateDPD()
380     vx = kp->kobj_regular[KPAD_USE_OBJECTS-1].center.x - kp->kobj_regular[0].center.x ;  in KPADCalibrateDPD()
382     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not become zero  in KPADCalibrateDPD()
383     kp->sec_nrm_hori.x = vx * f1 ;  in KPADCalibrateDPD()
644     f32             f1, vx,vy, ax,ay ;  in calc_acc_horizon()  local
660     vx = kp->accXY_nrm_hori.x * ax + kp->accXY_nrm_hori.y * ay ;  in calc_acc_horizon()
664     ax = ( vx - kp->acc_horizon.x ) * f1 + kp->acc_horizon.x ;  in calc_acc_horizon()
678     vx = kp->acc_horizon.x - kp->ah_circle_pos.x ;  in calc_acc_horizon()
680     if ( vx*vx + vy*vy <= kp_ah_circle_radius2 ) {  in calc_acc_horizon()
937     f32             f1, vx,vy ;  in calc_horizon()  local
940     vx = p2->x - p1->x ;  in calc_horizon()
942     f1 = 1.0f / sqrtf( vx * vx + vy * vy ) ;        // Should not become zero  in calc_horizon()
943     vx *= f1 ;  in calc_horizon()
946     hori->x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_horizon()
947     hori->y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_horizon()
1011     f32             f1,f2, vx,vy, min = 2.0f ;  in select_2obj_continue()  local
1024             vx = op2->center.x - op1->center.x ;  in select_2obj_continue()
1026             f1 = 1.0f / sqrtf( vx*vx + vy*vy ) ;    // Should not be zero  in select_2obj_continue()
1027             nrm.x = vx * f1 ;  in select_2obj_continue()
1086     f32             vx,vy ;  in select_1obj_first()  local
1091     vx = kp->sec_nrm_hori.x * kp->acc_horizon.x + kp->sec_nrm_hori.y * kp->acc_horizon.y ;  in select_1obj_first()
1095     vx *= kp->trust_sec_length ;  in select_1obj_first()
1103         p1.x = op1->center.x - vx ;     // Predicted point on the left  in select_1obj_first()
1105         p2.x = op1->center.x + vx ;     // Predicted point on the right  in select_1obj_first()
1149     f32             f1, vx,vy ;  in select_1obj_continue()  local
1163             vx = op1->center.x - op2->center.x ;  in select_1obj_continue()
1165             f1 = vx * vx + vy * vy ;  in select_1obj_continue()
1184     vx = kp->sec_length * kp->sec_nrm.x ;  in select_1obj_continue()
1187         kp->kobj_regular[1].center.x = rp1->center.x + vx ;  in select_1obj_continue()
1192         kp->kobj_regular[0].center.x = rp1->center.x - vx ;  in select_1obj_continue()
1211     f32             f1, vx,vy ;  in calc_obj_horizon()  local
1214     vx = kp->kobj_regular[1].center.x - kp->kobj_regular[0].center.x ;  in calc_obj_horizon()
1216     kp->sec_length = sqrtf( vx * vx + vy * vy ) ;   // Should not become zero  in calc_obj_horizon()
1221     kp->sec_nrm.x = ( vx *= f1 ) ;  in calc_obj_horizon()
1224     kp->obj_horizon.x = kp->sec_nrm_hori.x * vx + kp->sec_nrm_hori.y * vy ;  in calc_obj_horizon()
1225     kp->obj_horizon.y = kp->sec_nrm_hori.y * vx - kp->sec_nrm_hori.x * vy ;  in calc_obj_horizon()