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fe4da5cc | 1 | * |
2 | * $Id$ | |
3 | * | |
4 | * $Log$ | |
5 | * Revision 1.1.1.1 1995/10/24 10:20:53 cernlib | |
6 | * Geant | |
7 | * | |
8 | * | |
9 | #include "geant321/pilot.h" | |
10 | *CMZ : 3.21/02 29/03/94 15.41.30 by S.Giani | |
11 | *-- Author : | |
12 | SUBROUTINE GNOTR9(X,Y,Z,N1,N2,N3,N4) | |
13 | C. ****************************************************************** | |
14 | C. * * | |
15 | C. * GNOTR9 checks coplanarity of the face described by the * | |
16 | C. * indices N1,N2,N3,N4 into the vertex array X,Y,Z. * | |
17 | C. * This check is perfomed since shape TRAP is described by * | |
18 | C. * 11 values in the parameter array of which only 9 are * | |
19 | C. * independant. | |
20 | C. * Called by : GNOTR2 | |
21 | C. * Author R.Nierhaus ********* * | |
22 | C. * * | |
23 | C. ****************************************************************** | |
24 | * | |
25 | #include "geant321/gcunit.inc" | |
26 | * | |
27 | DIMENSION X(8),Y(8),Z(8) | |
28 | * | |
29 | A=-((Y(N2)-Y(N1))*(Z(N3)-Z(N1))-(Y(N3)-Y(N1))*(Z(N2)-Z(N1))) | |
30 | B=-((Z(N2)-Z(N1))*(X(N3)-X(N1))-(Z(N3)-Z(N1))*(X(N2)-X(N1))) | |
31 | C=-((X(N2)-X(N1))*(Y(N3)-Y(N1))-(X(N3)-X(N1))*(Y(N2)-Y(N1))) | |
32 | V=(X(N4)-X(N1))*A+(Y(N4)-Y(N1))*B+(Z(N4)-Z(N1))*C | |
33 | IF (ABS(V)/SQRT(A**2+B**2+C**2).GT.1.E-3) THEN | |
34 | WRITE(CHMAIL,1001) | |
35 | CALL GMAIL(0,0) | |
36 | 1001 FORMAT (' GNOTR9 ...TRAP shape : surface not coplanar') | |
37 | END IF | |
38 | * | |
39 | END | |
40 |