5 * Revision 1.1.1.1 1995/10/24 10:20:48 cernlib
9 #include "geant321/pilot.h"
10 *CMZ : 3.21/02 29/03/94 15.41.28 by S.Giani
12 SUBROUTINE GFLRAD(IAXIS,ISH,IROT,DX,PARS,CL,CH,IERR)
14 C. ******************************************************************
16 C. * ROUTINE TO COMPUTE THE LIMITS IN R FOR THE SHAPE ISH *
17 C. * DISPLACED BY THE VECTOR DX AND ROTATED BY THE MATRIX IROT. *
18 C. * IF IAXIS = 4 THE R IS THE XY PLANE R, IF IAXIS = 5 IT IS *
19 C. * THE 3 DINEMSIONAL SPACE R. THE SHAPE HAS NPAR PARAMETERS *
20 C. * IN THE ARRAY PARS. THE LOWER LIMIT IS RETURNED IN CL AND *
21 C. * THE HIGHER IN CH. IF THE CALCULATION CANNOT BE PERFORMED *
22 C. * IERR IS SET TO 1 OTHERWISE IT IS SET TO 0. *
24 C. * ==>Called by : GFCLIM *
25 C. * Author A.McPherson ********* *
27 C. ******************************************************************
29 #include "geant321/gcbank.inc"
30 #include "geant321/gconsp.inc"
31 #include "geant321/gcshno.inc"
32 DIMENSION DX(3),PARS(11),X(3),XT(3)
34 C. --------------------------------------------------
38 C FIRST CALCULATE THE LENGTH OF THE DISPLACEMENT OF THE
41 DXS=DX(1)*DX(1)+DX(2)*DX(2)
42 IF(IAXIS.EQ.5) DXS=DXS+DX(3)*DX(3)
43 IF(DXS.GT.0.0) DXS=SQRT(DXS)
45 IF(ISH.GT.4.AND.ISH.NE.10.AND.ISH.NE.28) GO TO 40
47 C CUBOIDS, TRAPEZOIDS, PARALLELEPIPEDS.
54 C THIS IS A LOOP OVER THE 8 CORNERS.
55 C FIRST FIND THE LOCAL COORDINATES.
59 C General twisted trapezoid.
65 X(1)=PARS(I0)+PARS(I0+2)*X(3)
66 X(2)=PARS(I0+1)+PARS(I0+3)*X(3)
75 IF(IP.LE.4) X(3)=-X(3)
77 IF(ISH.GT.2.AND.X(3).GT.0.0) IP2=4
78 IF(ISH.EQ.1.OR.ISH.EQ.10) IP2=2
80 IF(ISH.EQ.4.AND.X(3).GT.0.0) IP2=8
82 IF(MOD(IP+3,4).LT.2) X(2)=-X(2)
84 IF(ISH.NE.1.AND.ISH.NE.10.AND.X(3).GT.0.0) IP1=2
86 IF(ISH.EQ.4.AND.X(3).GT.0.0) IP1=IP1+4
87 IF(ISH.EQ.4.AND.X(2).GT.0.0) IP1=IP1+1
89 IF(MOD(IP,2).EQ.1) X(1)=-X(1)
91 IF(ISH.NE.10) GO TO 10
92 X(1)=X(1)+X(2)*PARS(4)+X(3)*PARS(5)
93 X(2)=X(2)+X(3)*PARS(6)
98 IF(X(3).GT.0.0) IP4=11
99 X(1)=X(1)+X(2)*PARS(IP4)+X(3)*PARS(2)
100 X(2)=X(2)+X(3)*PARS(3)
109 IF(IROT.NE.0) CALL GINROT(X,Q(JROT+1),XT)
111 C NOW COMPUTE RMIN = PROJECTED R ON DX AND RMAX = R
112 C AND UPDATE LIMITS IF NECESSARY.
114 R2=(XT(1)+DX(1))**2+(XT(2)+DX(2))**2
115 IF(IAXIS.EQ.5) R2=R2+(XT(3)+DX(3))**2
119 IF(CL.LE.0.0) GO TO 30
121 XPT=DX(1)*XT(1)+DX(2)*XT(2)
122 IF(IAXIS.EQ.5) XPT=XPT+DX(3)*XT(3)
123 IF(DXS.LE.1.0E-05) GO TO 30
135 IF(ISH.GT.8.AND.ISH.NE.NSCTUB.AND.ISH.NE.13.AND.ISH.NE.14)GO TO 80
140 IF(ISH.GT.6.AND.ISH.NE.NSCTUB.AND.ISH.NE.13.AND.ISH.NE.14) IP3=1
143 IF(ISH.EQ.NSCTUB) THEN
144 S1 = (1.0-PARS(8))*(1.0+PARS(8))
145 IF( S1 .GT. 0.0) S1 = SQRT(S1)
146 S2 = (1.0-PARS(11))*(1.0+PARS(11))
147 IF( S2 .GT. 0.0) S2 = SQRT(S2)
148 IF( S2 .GT. S1 ) S1 = S2
154 ** APPROXIME TO A CYLINDER WHIT RADIUS
155 ** EQUAL TO THE ELLIPSE MAJOR AXIS
158 IF(PARS(1).GT.R) R=PARS(1)
164 R = SQRT(PARS(2)**2+(PARS(3)*TAN(PARS(4)*DEGRAD))**2)
168 IF(ISH.LE.6.OR.ISH.EQ.NSCTUB) GO TO 50
171 IF(PARS(5).GT.R) R=PARS(5)
173 IF(PARS(4).LT.RMN) RMN=PARS(4)
177 C ROTATE THE LOCAL Z AXIS.
186 IF(IROT.NE.0) CALL GINROT(X,Q(JROT+1),XT)
188 C COMPUTE RMIN AND RMAX ASSUMING COMPLETE TUBE HALF
189 C LENGTH DZ AND RADIUS R.
192 IF(IAXIS.EQ.4) ST2=(1+XT(3))*(1-XT(3))
193 DR=SQRT(DZ*DZ*ST2+R*R)
197 IF(IROT.EQ.0.AND.DXS.LT.1.0E-05) CL=RMN
203 IF(ISH.GT.9) GO TO 999
210 IF(IAXIS.EQ.5.AND.DXS.LT.1.0E-05) CL=PARS(1)