Merging the VirtualMC branch to the main development branch (HEAD)

[u/mrichter/AliRoot.git] / GEANT321 / fluka / twopar.F

diff --git a/GEANT321/fluka/twopar.F b/GEANT321/fluka/twopar.F
deleted file mode 100644 (file)
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--- a/GEANT321/fluka/twopar.F
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-*
-* $Id$
-*
-* $Log$
-* Revision 1.1.1.1  1995/10/24 10:19:58  cernlib
-* Geant
-*
-*
-#include "geant321/pilot.h"
-*CMZ :  3.21/02 29/03/94  15.41.44  by  S.Giani
-*-- Author :
-*$ CREATE TWOPAR.FOR
-*COPY TWOPAR
-*
-*=== twopar ===========================================================*
-*
-      SUBROUTINE TWOPAR(E1,E2,P1,P2,COD1,COD2,COF1,COF2,SIF1,SIF2,
-     1IT1,IT2,UMOO,ECM,P,N,AM1,AM2)
- 
-#include "geant321/dblprc.inc"
-#include "geant321/dimpar.inc"
-#include "geant321/iounit.inc"
-C     ******************************************************
-C     QUASI TWO PARTICLE PRODUCTION
-C     TWOPAR CALCULATES THE ENERGYS AND THE MOMENTA
-C     FOR THE CREATED PARTICLES OR RESONANCES IT1 AND IT2
-C     IN THE CM - SYSTEM
-C     COD1,COD2,COF1,COF2,SIF1,SIF2 ARE THE ANGLES FOR
-C     SPHERICAL COORDINATES
-C     ******************************************************
-      COMMON /FKGAMR/ REDU,AMO,AMM(15 )
-      COMMON/FKABLT/AM(110),GA(110),TAU(110),ICH(110)
-     *,IBAR(110),K1(110),K2(110)
-   9   CONTINUE
-      AMA=AM1
-      AMB=AM2
-      AMA2=AMA*AMA
-      AMB2=AMB*AMB
-      S=UMOO*UMOO
-      E1=(S-AMB2+AMA2)/(2.D0*UMOO)
-      E2=(S-AMA2+AMB2)/(2.D0*UMOO)
-      AMTE=MAX(E1*E1-AMA2,ZERZER)
-  11  CONTINUE
-      AMTE=AMTE
-      P1=SQRT(AMTE)
-      P2=P1
-C     / P2 / = / P1 /  BUT OPPOSITE DIRECTIONS
-C     DETERMINATION  OF  THE ANGLES
-C     COS(THETA1)=COD1      COS(THETA2)=COD2
-C     SIN(PHI1)=SIF1        SIN(PHI2)=SIF2
-C     COS(PHI1)=COF1        COS(PHI2)=COF2
-C     PHI IS UNIFORMLY DISTRIBUTED IN ( 0,2*PI )
-      CALL COSI(COF1,SIF1)
-      COF2=-COF1
-      SIF2=-SIF1
-C     CALCULATION OF THETA1
-      CALL TCHOIC(TR,P,P1,ECM,E1,IT1,IT2,N,AM1,AM2)
-      COD1=(TR-AMA2-AM(N)*AM(N)+2.D0*ECM*E1)/(2.D0*P*P1+1.D-18)
-      IF (ABS(COD1) .GT. 1.D+00) COD1 = SIGN (ONEONE,COD1)
-      COD2=-COD1
-      RETURN
-      END