GEANT321/gphys/gdrot.F

   1 *
   2 * $Id$
   3 *
   4 * $Log$
   5 * Revision 1.1.1.1  1995/10/24 10:21:24  cernlib
   6 * Geant
   7 *
   8 *
   9 #include "geant321/pilot.h"
  10 *CMZ :  3.21/02 29/03/94  15.41.21  by  S.Giani
  11 *-- Author :
  12       SUBROUTINE GDROT(P,COSTH,SINTH,COSPH,SINPH)
  13 C.
  14 C.    ******************************************************************
  15 C.    *                                                                *
  16 C.    *  Rotates vector from one reference system into another.        *
  17 C.    *  THETA and PHI are anti-clockwise Eulerian angles between the  *
  18 C.    *  two systems.                                                  *
  19 C.    *                                                                *
  20 C.    *    ==>Called by : GBREME,GCOMP,GDECAY,GDECA3,GDRAY,GPAIRG      *
  21 C.    *       Author    M.Hansroul, G.Patrick  *********               *
  22 C.    *                                                                *
  23 C.    *                                                                *
  24 C.    ******************************************************************
  25 C.
  26       DIMENSION P(3)
  27 #if !defined(CERNLIB_SINGLE)
  28       DOUBLE PRECISION P1,P2,P3
  29 #endif
  30 C.
  31 C.    ------------------------------------------------------------------
  32 C.
  33       P1=P(1)
  34       P2=P(2)
  35       P3=P(3)
  36       P(1)=P1*COSTH*COSPH - P2*SINPH + P3*SINTH*COSPH
  37       P(2)=P1*COSTH*SINPH + P2*COSPH + P3*SINTH*SINPH
  38       P(3)=-P1*SINTH                 + P3*COSTH
  39 C
  40       END