SUBROUTINE  : FPCXTD
 
AUTHOR : "I. O. Skillicorn"
 
DATE : 24/04/95
 
LANGUAGE : FORTRAN
 
SHORT SUMMARY of PURPOSE:                                                
                                                                                
          Link planar and radial based tracks                                   
          to connected and disconnected set planar                              
          line segments ( primary+secondary+tertiary).                          
          Note: this is the only routine that uses                              
          connected planars. Note also the check that                           
          points have not been previously used.                                 
                                                                                
LIST and DESCRIPTION of INPUT VARIABLES/ARGUMENTS:                       
                                                                                
 Radial-based tracks:                                                           
          IG tracks                                                             
          Hits/drift sign         :- IRN/SDN IRP/SDP                            
          Segments planars/radials:- ISGG LNK3                                  
          Parameters(phi',phi0)   :- RPCOSG,phzg                                
          Parameters(R',R0)       :- RPSING,ZIG                                 
 Planar-based and P->R link tracks:                                             
          NPP tracks                                                            
          Hits                    :- IRR/SRR IPP/SPP                            
          Segments radials/planars:- LRR LPP                                    
          Parameters(phi',phi0)   :- PSSS,PISS                                  
          Parameters(R',R0)       :- RSSS,RISS                                  
                                                                                
                                                                                
LIST and DESCRIPTION of OUTPUT VARIABLES/ARGUMENTS:                      
                                                                                
          Used point flag         :- IPUZE                                      
          Hits/drift sign         :- IRN/SDN IRP/SDP                            
          Segments planars/radials:- ISGG LNK3                                  
          Hits                    :- IRR/SRR IPP/SPP                            
          Segments radials/planars:- LRR LPP                                    
                                                                                
 
CALLING TREE from FPCXTD :
 
None
 
FUNCTIONS USED :
 
None
 
KEEP SEQUENCES USED :
 
 FRDIMS FH1WORK FPTVTX FRH3FT FPPRAM FPLSEG FPTFLG FPTPAR FDIFLG                                              
                                                                                                              
 

 
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