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SUBROUTINE VISRB (X,Y,P, J,M, X1,Y1,P1, NA,NB,
X X2,Y2,P2, NC,ND, S)
C$ (Restricted Bound)
C$ The bound is restricted to the interval where the first
C$ function is defined. The arguments are:
C$
C$ X(M),Y(M)......Arrays for the bound of two functions.
C$ P(M)...........Visibility flags of the bound.
C$ J,M............Actual dimension, maximum dimension of X,Y.
C$ X1(N1),Y1(N1)..First function.
C$ P1(N1).........Visibility flags for the first function.
C$ (NA,NB)........Range of indices in use for the first
C$ function. These may be in either order, and
C$ N1 is then the maximum of the two.
C$ X2(N2),Y2(N2)..Second function.
C$ P2(N2).........Visibility flags for the second function.
C$ (NC,ND)........Range of indices in use for the second
C$ function. These may be in either order, and
C$ N2 is then the maximum of the two.
C$ S..............Type of bound ( = 1.0,upper; = -1.0,lower).
C$ (09-APR-82)