C
C There are a total of 5 entries in the algebraic variable array.
C There are a total of 2 entries in each of the rate and state variable arrays.
C There are a total of 17 entries in the constant variable array.
C
C
C VOI is time in component environment (minute).
C STATES(1) is x1 in component x1 (picomole).
C CONSTS(15) is k in component k (flux).
C ALGBRC(5) is lambda_Ca in component lambda_Ca (per_minute).
C CONSTS(1) is lambda1 in component model_parameters (per_minute).
C CONSTS(16) is A in component A (per_minute).
C CONSTS(17) is B in component B (per_minute).
C ALGBRC(1) is Ca in component Ca (millimolar).
C ALGBRC(4) is S in component S (millimolar).
C ALGBRC(3) is m_Ca in component m_Ca (dimensionless).
C CONSTS(2) is m1 in component model_parameters (dimensionless).
C CONSTS(3) is m2 in component model_parameters (dimensionless).
C CONSTS(4) is beta in component model_parameters (litre_per_millimole).
C CONSTS(5) is R in component model_parameters (millimolar).
C STATES(2) is x2 in component x2 (picomole).
C ALGBRC(2) is PTH in component x2 (picomole).
C CONSTS(6) is lambda2 in component model_parameters (per_minute).
C CONSTS(7) is Ca_0 in component model_parameters (millimolar).
C CONSTS(8) is Ca_1 in component model_parameters (millimolar).
C CONSTS(9) is alpha in component model_parameters (per_minute).
C CONSTS(10) is t0 in component model_parameters (minute).
C CONSTS(11) is x1_n in component model_parameters (picomole).
C CONSTS(12) is x2_n in component model_parameters (picomole).
C CONSTS(13) is x2_max in component model_parameters (picomole).
C CONSTS(14) is x2_min in component model_parameters (picomole).
C RATES(1) is d/dt x1 in component x1 (picomole).
C RATES(2) is d/dt x2 in component x2 (picomole).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      STATES(1) = 0.00
      CONSTS(1) = 0.0125
      CONSTS(2) = 112.5200
      CONSTS(3) = 15.00
      CONSTS(4) = 1e6
      CONSTS(5) = 1.2162
      STATES(2) = 0.00
      CONSTS(6) = 0.5595
      CONSTS(7) = 1.255
      CONSTS(8) = 0.1817
      CONSTS(9) = 0.0442
      CONSTS(10) = 575.0
      CONSTS(11) = 490.7800
      CONSTS(12) = 6.6290
      CONSTS(13) = 14.0430
      CONSTS(14) = 0.6697
      CONSTS(15) =  CONSTS(6)*CONSTS(12)+ CONSTS(1)*CONSTS(11)
      CONSTS(16) = ( CONSTS(1)*CONSTS(6)*CONSTS(13))/(CONSTS(15) -  CONSTS(6)*CONSTS(13))
      CONSTS(17) = ( CONSTS(1)*CONSTS(6)*CONSTS(14))/(CONSTS(15) -  CONSTS(6)*CONSTS(14))
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = TERNRY(VOI.LT.CONSTS(10), CONSTS(7), CONSTS(7) -  CONSTS(8)*(1.00000 - EXP( - CONSTS(9)*(VOI - CONSTS(10)))))
      ALGBRC(3) = CONSTS(2)/(1.00000+EXP( - CONSTS(4)*(CONSTS(5) - ALGBRC(1))))+CONSTS(3)
      ALGBRC(4) =  CONSTS(7)*- (( CONSTS(11)*CONSTS(17) -  CONSTS(6)*CONSTS(12))/( CONSTS(11)*CONSTS(16) -  CONSTS(6)*CONSTS(12))) ** 1.00000/ALGBRC(3)
      ALGBRC(5) = (CONSTS(16) - CONSTS(17))/(1.00000+ALGBRC(1)/ALGBRC(4) ** ALGBRC(3))+CONSTS(17)
      RATES(1) = CONSTS(15) - ( ALGBRC(5)*STATES(1)+ CONSTS(1)*STATES(1))
      RATES(2) =  ALGBRC(5)*STATES(1) -  CONSTS(6)*STATES(2)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = TERNRY(VOI.LT.CONSTS(10), CONSTS(7), CONSTS(7) -  CONSTS(8)*(1.00000 - EXP( - CONSTS(9)*(VOI - CONSTS(10)))))
      ALGBRC(3) = CONSTS(2)/(1.00000+EXP( - CONSTS(4)*(CONSTS(5) - ALGBRC(1))))+CONSTS(3)
      ALGBRC(4) =  CONSTS(7)*- (( CONSTS(11)*CONSTS(17) -  CONSTS(6)*CONSTS(12))/( CONSTS(11)*CONSTS(16) -  CONSTS(6)*CONSTS(12))) ** 1.00000/ALGBRC(3)
      ALGBRC(5) = (CONSTS(16) - CONSTS(17))/(1.00000+ALGBRC(1)/ALGBRC(4) ** ALGBRC(3))+CONSTS(17)
      ALGBRC(2) = STATES(2)/2.75000
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END