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SUBROUTINE PCOORD (PEN)
C
C PLOTS A COORDINATE TRIAD AT THE LOWER RIGHT CORNER OF A STRUCTURAL
C PLOT. THIS ROUTINE IS CALLED ONLY BY DRAW
C
C WRITTEN BY G.CHAN/UNISYS 10/1990
C
INTEGER PEN,FPLTIT,SYM(2)
COMMON /XXPARM/ IDUMM(215),FPLTIT
COMMON /PLTDAT/ IDUM20(20),SIZE,IDUM2(2),CNTCHR(2)
COMMON /DRWAXS/ G(3,4)
C
C
C COMPUTE THE ORIGIN, WHICH IS A FUNCTION OF FRAME SIZE, CHARACTER
C VERTICAL AND HORIZONTAL SCALES, PRESENCE OF PTITLE LINE, AND THE
C OVERALL SIZE OF THE TRIAD
C
C ALL THE NUMERIC MULTIPLIERS USED BELOW WERE WORKED OUT WITH FRAME
C SIZE OF 1023.0. THEY SHOULD BE APPLICABLE TO FRAME SIZE OF 3000.
C
X2 = 0.0
Y2 = 0.0
Y1 = 0.0
DO 10 I = 1,3
IF (G(2,I) .GT. X2) X2 = G(2,I)
IF (G(3,I) .LT. Y2) Y2 = G(3,I)
IF (G(3,I) .GT. Y1) Y1 = G(3,I)
10 CONTINUE
DE = 1.8*CNTCHR(1)
SF = 2.7*CNTCHR(2)
IF (FPLTIT .EQ. 0) SF = 1.3*SF
SF = SF/(Y1-Y2)
X1 = SIZE - X2*SF - DE
Y1 = -Y2*SF
IF (FPLTIT .NE. 0) Y1 = Y1 + 0.8*CNTCHR(2)
EP = 0.0001
OF = -1.
IF (G(2,1).LE.EP .AND. G(2,2).LE.EP .AND. G(2,3).LE.EP) OF = +1.
IF (OF .EQ. +1.) X1 = X1 - DE
C
C DRAW THE X-Y-Z COORDINATE TRIAD
C DRAW A CIRCLE AT THE ORIGIN IF ANY AXIS IS IN LINE WITH VIEWER
C
SYM(1) = 6
SYM(2) = 0
DE = 0.8*CNTCHR(1)
OF = 1.3*OF*CNTCHR(1)
DO 30 I = 1,3
X2 = G(2,I)*SF + X1
Y2 = G(3,I)*SF + Y1
CALL LINE (X1,Y1,X2,Y2,PEN,0)
IF (ABS(G(2,I))+ABS(G(3,I)) .GE. EP) GO TO 20
CALL SYMBOL (X1,Y1,SYM,0)
CALL TIPE (X2+OF,Y2,1,G(I,4),1,0)
GO TO 30
20 IF (G(2,I) .GT. 0.0) CALL TIPE (X2+DE,Y2,1,G(I,4),1,0)
IF (G(2,I) .LE. 0.0) CALL TIPE (X2-DE,Y2,1,G(I,4),1,0)
30 CONTINUE
C
RETURN
END
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