Fixed some arithmetic errors in arc calculations
Fixed some arithmetic errors in arc calculations

harry159821/printipi,Wallacoloo/printipi,Wallacoloo/printipi,Igor-Rast/printipi,harry159821/printipi,Wallacoloo/printipi,Igor-Rast/printipi,Wallacoloo/printipi,Igor-Rast/printipi,harry159821/printipi,Igor-Rast/printipi,harry159821/printipi