C Copyright(C) 1999-2020 National Technology & Engineering Solutions
C of Sandia, LLC (NTESS).  Under the terms of Contract DE-NA0003525 with
C NTESS, the U.S. Government retains certain rights in this software.
C
C See packages/seacas/LICENSE for details

C=======================================================================
      LOGICAL FUNCTION MPCLP3(N,PX,PY,PZ,VX,VY,VZ)
      COMMON /MAP/MODEL(4,4),VIEW(4,4),PROJ(4,4),CPNEAR,CPFAR,VWPORT(4),
     *       MVP(4,4),VP(4,4),CPLINE(2,2,10),CPPLAN(2,3,10),PEYE(3),
     *       PLOOK(3),ETWIST,NCPLIN,NCPLAN,TMAT1(4,4),TMAT2(4,4),
     *       TMAT3(4,4),TVEC1(4),TVEC2(4),TVEC3(4),TVEC4(4),TARR1(32),
     *       TARR2(32),TARR3(32),TARR4(32),TARR5(32),TARR6(32),
     *       TARR7(32),TARR8(32)
      REAL MODEL,MVP
      CHARACTER*6 SUBNAM
      DIMENSION PX(*),PY(*),PZ(*),VX(*),VY(*),VZ(*)
      PARAMETER (SUBNAM='MPCLP3')

      MPCLP3 = .FALSE.
      IF (N.GT.10) THEN
         CALL PLTFLU
         CALL SIORPT(SUBNAM,
     *               'Too many clipping planes specified; max is 10',2)
         RETURN

      END IF

      IF (N.LT.0) THEN
         CALL PLTFLU
         CALL SIORPT(SUBNAM,
     *               'You cannot specify less than zero clipping planes'
     *               ,2)
         RETURN

      END IF

      MPCLP3 = .TRUE.
      NCPLAN = N
      DO 2440 I = 1,N
         CPPLAN(1,1,I) = PX(I)
         CPPLAN(1,2,I) = PY(I)
         CPPLAN(1,3,I) = PZ(I)
         CPPLAN(2,1,I) = VX(I)
         CPPLAN(2,2,I) = VY(I)
         CPPLAN(2,3,I) = VZ(I)
 2440 CONTINUE
      RETURN

      END