C
C There are a total of 3 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 15 entries in the constant variable array.
C
C
C VOI is time in component environment (hour).
C CONSTS(1) is T_a in component model_parameters (celsius).
C CONSTS(2) is T_b in component model_parameters (celsius).
C CONSTS(3) is delta_T in component model_parameters (celsius).
C CONSTS(4) is kinc in component model_parameters (W_per_kg_C2).
C ALGBRC(3) is M_c in component M_c (W_per_kg).
C CONSTS(5) is t_day in component M_c (hour).
C CONSTS(6) is t_night in component M_c (hour).
C ALGBRC(1) is tprime in component M_c (second).
C CONSTS(7) is day_length in component M_c (second).
C CONSTS(14) is M_day in component M_day (W_per_kg).
C CONSTS(15) is M_night in component M_night (W_per_kg).
C STATES(1) is M in component M (W_per_kg).
C CONSTS(8) is km in component M (per_hour).
C STATES(2) is T in component T (celsius).
C CONSTS(9) is c in component T (kJ_per_kg_C).
C ALGBRC(2) is k in component k (W_per_kg_C).
C CONSTS(13) is kb in component kb (W_per_kg_C).
C CONSTS(11) is T_day in component T_day (celsius).
C CONSTS(12) is T_night in component T_night (celsius).
C CONSTS(10) is M_b in component kb (W_per_kg).
C RATES(1) is d/dt M in component M (W_per_kg).
C RATES(2) is d/dt T in component T (celsius).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      CONSTS(1) = 21.0
      CONSTS(2) = 38.0
      CONSTS(3) = 1.57
      CONSTS(4) = 0.0258
      CONSTS(5) = 17.5
      CONSTS(6) = 6.73
      CONSTS(7) = 86400
      STATES(1) = 3.5
      CONSTS(8) = 1.1375
      STATES(2) = 38.785
      CONSTS(9) = 3.47
      CONSTS(10) = 3.0
      CONSTS(11) = CONSTS(2)+CONSTS(3)/2.00000
      CONSTS(12) = CONSTS(2) - CONSTS(3)/2.00000
      CONSTS(13) = CONSTS(10)/(CONSTS(2) - CONSTS(1))
      CONSTS(14) =  (CONSTS(13)+ CONSTS(4)*(CONSTS(11) - CONSTS(2)))*(CONSTS(11) - CONSTS(1))
      CONSTS(15) =  (CONSTS(13)+ CONSTS(4)*(CONSTS(12) - CONSTS(2)))*(CONSTS(12) - CONSTS(1))
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(2) = CONSTS(13)+ CONSTS(4)*(STATES(2) - CONSTS(2))
      RATES(2) =  CONSTS(9) ** -1.00000*(STATES(1) -  ALGBRC(2)*(STATES(2) - CONSTS(1)))
      ALGBRC(1) =  INT(MOD( VOI*3600.00*1.00000, CONSTS(7)))
      ALGBRC(3) = TERNRY(ALGBRC(1)/3600.00.GE.CONSTS(6).AND.ALGBRC(1)/3600.00.LT.CONSTS(5), CONSTS(15), CONSTS(14))
      RATES(1) =  - CONSTS(8)*(STATES(1) - ALGBRC(3))
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(2) = CONSTS(13)+ CONSTS(4)*(STATES(2) - CONSTS(2))
      ALGBRC(1) =  INT(MOD( VOI*3600.00*1.00000, CONSTS(7)))
      ALGBRC(3) = TERNRY(ALGBRC(1)/3600.00.GE.CONSTS(6).AND.ALGBRC(1)/3600.00.LT.CONSTS(5), CONSTS(15), CONSTS(14))
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END