C
C There are a total of 2 entries in the algebraic variable array.
C There are a total of 3 entries in each of the rate and state variable arrays.
C There are a total of 7 entries in the constant variable array.
C
C
C VOI is time in component environment (hour).
C STATES(1) is R in component R (ng_ml).
C CONSTS(1) is h in component R (first_order_rate_constant).
C CONSTS(2) is c in component R (ng_ml_hr).
C CONSTS(3) is b1 in component R (first_order_rate_constant).
C ALGBRC(2) is H in component R (dimensionless).
C ALGBRC(1) is x in component R (ng_ml).
C STATES(2) is T in component T (ng_ml).
C STATES(3) is L in component L (ng_ml).
C CONSTS(4) is g1 in component L (first_order_rate_constant).
C CONSTS(5) is b2 in component L (first_order_rate_constant).
C CONSTS(6) is g2 in component T (first_order_rate_constant).
C CONSTS(7) is b3 in component T (first_order_rate_constant).
C RATES(1) is d/dt R in component R (ng_ml).
C RATES(3) is d/dt L in component L (ng_ml).
C RATES(2) is d/dt T in component T (ng_ml).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      STATES(1) = 0.5
      CONSTS(1) = 12
      CONSTS(2) = 100
      CONSTS(3) = 1.29
      STATES(2) = 15
      STATES(3) = 22
      CONSTS(4) = 10
      CONSTS(5) = 0.97
      CONSTS(6) = 0.7
      CONSTS(7) = 1.39
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      RATES(3) =  CONSTS(4)*STATES(1) -  CONSTS(5)*STATES(3)
      RATES(2) =  CONSTS(6)*STATES(3) -  CONSTS(7)*STATES(2)
      ALGBRC(1) = STATES(2) - CONSTS(2)/CONSTS(1)
      ALGBRC(2) = TERNRY(ALGBRC(1).GT.0.00000, 1.00000, 0.00000)
      RATES(1) =  (CONSTS(2) -  CONSTS(1)*STATES(2))*(1.00000 - ALGBRC(2)) -  CONSTS(3)*STATES(1)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = STATES(2) - CONSTS(2)/CONSTS(1)
      ALGBRC(2) = TERNRY(ALGBRC(1).GT.0.00000, 1.00000, 0.00000)
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END