You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
137 lines
3.7 KiB
137 lines
3.7 KiB
2 years ago
|
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=======================================================================
|
||
|
|
SUBROUTINE PLTVWV(PLL,PUR,N,MASK,PX,PY,QX,QY)
|
||
|
|
REAL PLL(2)
|
||
|
|
REAL PUR(2)
|
||
|
|
INTEGER N
|
||
|
|
INTEGER MASK(*)
|
||
|
|
REAL PX(*)
|
||
|
|
REAL PY(*)
|
||
|
|
REAL QX(*)
|
||
|
|
REAL QY(*)
|
||
|
|
include 'izbit.inc'
|
||
|
|
|
||
|
|
PUR1 = PUR(1) + .0001
|
||
|
|
PUR2 = PUR(2) + .0001
|
||
|
|
PLL1 = PLL(1) - .0001
|
||
|
|
PLL2 = PLL(2) - .0001
|
||
|
|
DX = PUR1 - PLL1
|
||
|
|
DY = PUR2 - PLL2
|
||
|
|
J = 0
|
||
|
|
KM = 0
|
||
|
|
10 CONTINUE
|
||
|
|
IF ((J.LT.N)) THEN
|
||
|
|
JN = MIN(N-J,32)
|
||
|
|
J1 = J
|
||
|
|
J = J + JN
|
||
|
|
KM = KM + 1
|
||
|
|
M = MASK(KM)
|
||
|
|
IF (M.NE.0) THEN
|
||
|
|
|
||
|
|
DO 20 K = 1,JN
|
||
|
|
JB = IZBIT(K)
|
||
|
|
IF (IAND(M,JB).NE.0) THEN
|
||
|
|
|
||
|
|
X1 = PX(K+J1)
|
||
|
|
Y1 = PY(K+J1)
|
||
|
|
X2 = QX(K+J1)
|
||
|
|
Y2 = QY(K+J1)
|
||
|
|
FP = X1 - PLL1
|
||
|
|
FQ = X2 - PLL1
|
||
|
|
IF (FP.LT.0. .AND. FQ.LT.0.) THEN
|
||
|
|
M = IAND(M,NOT(JB))
|
||
|
|
|
||
|
|
ELSE IF (FP.GT.DX .AND. FQ.GT.DX) THEN
|
||
|
|
M = IAND(M,NOT(JB))
|
||
|
|
|
||
|
|
ELSE
|
||
|
|
|
||
|
|
DF = FQ - FP
|
||
|
|
IF (DF.GT.0.) THEN
|
||
|
|
TN = (Y2-Y1)/DF
|
||
|
|
IF (FP.LT.0.) THEN
|
||
|
|
X1 = PLL1
|
||
|
|
Y1 = Y1 - FP*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
IF (FQ.GT.DX) THEN
|
||
|
|
X2 = PUR1
|
||
|
|
Y2 = Y2 + (DX-FQ)*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
ELSE IF (DF.LT.0.) THEN
|
||
|
|
TN = (Y2-Y1)/DF
|
||
|
|
IF (FQ.LT.0.) THEN
|
||
|
|
X2 = PLL1
|
||
|
|
Y2 = Y2 - FQ*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
IF (FP.GT.DX) THEN
|
||
|
|
X1 = PUR1
|
||
|
|
Y1 = Y1 + (DX-FP)*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
FP = Y1 - PLL2
|
||
|
|
FQ = Y2 - PLL2
|
||
|
|
IF (FP.LT.0. .AND. FQ.LT.0.) THEN
|
||
|
|
M = IAND(M,NOT(JB))
|
||
|
|
|
||
|
|
ELSE IF (FP.GT.DY .AND. FQ.GT.DY) THEN
|
||
|
|
M = IAND(M,NOT(JB))
|
||
|
|
|
||
|
|
ELSE
|
||
|
|
|
||
|
|
DF = FQ - FP
|
||
|
|
IF (DF.GT.0.) THEN
|
||
|
|
TN = (X2-X1)/DF
|
||
|
|
IF (FP.LT.0.) THEN
|
||
|
|
Y1 = PLL2
|
||
|
|
X1 = X1 - FP*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
IF (FQ.GT.DY) THEN
|
||
|
|
Y2 = PUR2
|
||
|
|
X2 = X2 + (DY-FQ)*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
ELSE IF (DF.LT.0.) THEN
|
||
|
|
TN = (X2-X1)/DF
|
||
|
|
IF (FQ.LT.0.) THEN
|
||
|
|
Y2 = PLL2
|
||
|
|
X2 = X2 - FQ*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
IF (FP.GT.DY) THEN
|
||
|
|
Y1 = PUR2
|
||
|
|
X1 = X1 + (DY-FP)*TN
|
||
|
|
END IF
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
PX(K+J1) = X1
|
||
|
|
PY(K+J1) = Y1
|
||
|
|
QX(K+J1) = X2
|
||
|
|
QY(K+J1) = Y2
|
||
|
|
END IF
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
20 CONTINUE
|
||
|
|
MASK(KM) = M
|
||
|
|
END IF
|
||
|
|
|
||
|
|
GO TO 10
|
||
|
|
|
||
|
|
END IF
|
||
|
|
|
||
|
|
END
|