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54 lines
1.2 KiB
54 lines
1.2 KiB
C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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C=======================================================================
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SUBROUTINE PLTVWP(PLL,PUR,N,MASK,PX,PY)
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REAL PLL(2),PUR(2)
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INTEGER MASK(*)
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REAL PX(*),PY(*)
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include 'izbit.inc'
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PUR1 = PUR(1) + .0001
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PUR2 = PUR(2) + .0001
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PLL1 = PLL(1) - .0001
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PLL2 = PLL(2) - .0001
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J = 0
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KM = 0
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2300 IF (.NOT. (J.LT.N)) GO TO 2310
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JN = MIN(N-J,32)
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J1 = J
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J = J + JN
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KM = KM + 1
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IF (MASK(KM).EQ.0) THEN
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GO TO 2300
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END IF
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DO 2320 K = 1,JN
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IF (IAND(MASK(KM),IZBIT(K)).EQ.0) THEN
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GO TO 2320
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END IF
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IF (PX(K+J1).LT.PLL1 .OR. PX(K+J1).GT.PUR1) THEN
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MASK(KM) = IAND(MASK(KM),NOT(IZBIT(K)))
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GO TO 2320
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END IF
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IF (PY(K+J1).LT.PLL2 .OR. PY(K+J1).GT.PUR2) THEN
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MASK(KM) = IAND(MASK(KM),NOT(IZBIT(K)))
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GO TO 2320
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END IF
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2320 CONTINUE
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GO TO 2300
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2310 CONTINUE
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RETURN
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END
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