C
C There are a total of 3 entries in the algebraic variable array.
C There are a total of 1 entries in each of the rate and state variable arrays.
C There are a total of 8 entries in the constant variable array.
C
C
C VOI is time in component environment (minute).
C CONSTS(1) is PRA in component volume_receptors (mmHg).
C CONSTS(8) is AHZ in component effect_of_pressure_on_volume_receptors (dimensionless).
C CONSTS(2) is AH10 in component parameter_values (dimensionless).
C CONSTS(3) is AH9 in component parameter_values (per_mmHg).
C CONSTS(7) is AHZ1 in component effect_of_pressure_on_volume_receptors (dimensionless).
C STATES(1) is AHY in component time_dependent_volume_receptor_adaptation (dimensionless).
C CONSTS(4) is AH11 in component parameter_values (minute).
C ALGBRC(1) is AH7 in component total_volume_nervous_feedback (dimensionless).
C ALGBRC(2) is ATRRFB in component volume_effect_on_arteries (dimensionless).
C CONSTS(5) is ATRFBM in component parameter_values (dimensionless).
C ALGBRC(3) is ATRVFB in component volume_effect_on_unstressed_venous_volume (litre).
C CONSTS(6) is ATRVM in component parameter_values (litre).
C RATES(1) is d/dt AHY in component time_dependent_volume_receptor_adaptation (dimensionless).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      CONSTS(1) = 0.00852183
      CONSTS(2) = 0.333
      CONSTS(3) = 1
      STATES(1) = 0.301963
      CONSTS(4) = 1000
      CONSTS(5) = 0
      CONSTS(6) = 0
      CONSTS(7) =  ABS(CONSTS(1)) ** CONSTS(2)*CONSTS(3)
      CONSTS(8) = TERNRY(CONSTS(1).LT.0.00000, - CONSTS(7), CONSTS(7))
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      RATES(1) = (CONSTS(8) - STATES(1))/CONSTS(4)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = CONSTS(8) - STATES(1)
      ALGBRC(2) =  ALGBRC(1)*CONSTS(5)+1.00000
      ALGBRC(3) =  ALGBRC(1)*CONSTS(6)
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END