fixes

src/DetectorConstruction.cc

@@ -251,6 +251,7 @@ G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
       layer.assignPhysicalVolume(ppv); //maybe this needs to be ppv - check
 
       // assign sensors to layer by copyNumber; access the copyNumber of the volumes
+      
       if(layer.isActive){
          for(int i = 0; i < layer.nx*layer.ny; i++){
              Sensor sensor;
@@ -263,6 +264,7 @@ G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
       }
 
       position += layer.thickness / 2 *cm; //assign the physical volume to the layer
+
   }
   //
   // Visualization attributes