virtual Int_t ISector() {return 1;}
// calculate sector from x-y coordinates
virtual Int_t Sector(Int_t ix, Int_t iy) {return 1;}
+ virtual Int_t Sector(Float_t x, Float_t y) {return 1;}
//
// Signal Generation Condition during Stepping
virtual Int_t SigGenCond(Float_t x, Float_t y, Float_t z);