This commit was generated by cvs2svn to compensate for changes in r2,
[u/mrichter/AliRoot.git] / GEANT321 / gdraw / gdcirr.F
1 *
2 * $Id$
3 *
4 * $Log$
5 * Revision 1.1.1.1  1995/10/24 10:20:22  cernlib
6 * Geant
7 *
8 *
9 #include "geant321/pilot.h"
10 *CMZ :  3.21/02 29/03/94  15.41.26  by  S.Giani
11 *-- Author :
12       SUBROUTINE GDCIRR(R,THROT)
13 C.
14 C.    ******************************************************************
15 C.    *                                                                *
16 C.    *       Draw a circle of radius R, centered on the origin,       *
17 C.    *       on a plane whose normal is parallel to X-Y plane         *
18 C.    *       with an angle THROT with X-axis                          *
19 C.    *                                                                *
20 C.    *    ==>Called by : GDRAWS                                       *
21 C.    *       Author : P.Zanarini   *********                          *
22 C.    *                                                                *
23 C.    ******************************************************************
24 C.
25 #include "geant321/gcdraw.inc"
26 #include "geant321/gconsp.inc"
27       DIMENSION X(3,41),U(41),V(41)
28 C.
29 C.    ------------------------------------------------------------------
30 C.
31       IF (R.LT.0.0001) GO TO 999
32 C
33       GTHROT=THROT*DEGRAD
34       STHROT=SIN(GTHROT)
35       CTHROT=COS(GTHROT)
36 C
37       DO 10 I=1,40
38          X(1,I)=R*GCOS(I)*CTHROT
39          X(2,I)=R*GSIN(I)
40          X(3,I)=R*GCOS(I)*STHROT
41    10 CONTINUE
42 C
43       CALL GDFR3D(X,40,U,V)
44 C
45 CM             Short circuit in case of GMR
46 C
47       IF ( IGMR .NE. 0 ) GO TO 999
48 CM
49       U(41)=U(1)
50       V(41)=V(1)
51       CALL GDRAWV(U,V,41)
52 C
53   999 RETURN
54       END