/*
   There are a total of 9 entries in the algebraic variable array.
   There are a total of 5 entries in each of the rate and state variable arrays.
   There are a total of 11 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (dimensionless).
 * ALGEBRAIC[0] is f in component f (dimensionless).
 * CONSTANTS[0] is a in component f (dimensionless).
 * STATES[0] is r in component r (dimensionless).
 * CONSTANTS[1] is p in component model_parameters (dimensionless).
 * CONSTANTS[2] is beta in component r (dimensionless).
 * CONSTANTS[3] is alpha in component r (dimensionless).
 * ALGEBRAIC[2] is ur0 in component ur0 (dimensionless).
 * ALGEBRAIC[6] is m in component m (dimensionless).
 * CONSTANTS[4] is r0 in component model_parameters (dimensionless).
 * ALGEBRAIC[4] is y in component y (dimensionless).
 * CONSTANTS[5] is r1 in component model_parameters (dimensionless).
 * ALGEBRAIC[3] is ur1 in component ur1 (dimensionless).
 * ALGEBRAIC[5] is z in component z (dimensionless).
 * CONSTANTS[6] is t1 in component model_parameters (dimensionless).
 * STATES[1] is x1 in component x1 (dimensionless).
 * ALGEBRAIC[8] is q in component q (dimensionless).
 * CONSTANTS[7] is d in component q (dimensionless).
 * CONSTANTS[8] is k in component q (dimensionless).
 * ALGEBRAIC[7] is uz in component uz (dimensionless).
 * STATES[2] is x2 in component x2 (dimensionless).
 * CONSTANTS[9] is t2 in component model_parameters (dimensionless).
 * STATES[3] is x3 in component x3 (dimensionless).
 * ALGEBRAIC[1] is phi in component phi (dimensionless).
 * STATES[4] is h in component h (dimensionless).
 * CONSTANTS[10] is t4 in component model_parameters (dimensionless).
 * RATES[0] is d/dt r in component r (dimensionless).
 * RATES[1] is d/dt x1 in component x1 (dimensionless).
 * RATES[2] is d/dt x2 in component x2 (dimensionless).
 * RATES[3] is d/dt x3 in component x3 (dimensionless).
 * RATES[4] is d/dt h in component h (dimensionless).
 * There are a total of 5 condition variables.
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
CONSTANTS[0] = 1.0;
STATES[0] = 0.5;
CONSTANTS[1] = 1.05;
CONSTANTS[2] = 1.0;
CONSTANTS[3] = 1.0;
CONSTANTS[4] = 0.5;
CONSTANTS[5] = 1.2;
CONSTANTS[6] = 0.1;
STATES[1] = 0.0;
CONSTANTS[7] = 5.0;
CONSTANTS[8] = 10.5;
STATES[2] = 0.0;
CONSTANTS[9] = 0.5;
STATES[3] = 0.0;
STATES[4] = 0.0;
CONSTANTS[10] = 20.0;
RATES[0] = 0.1001;
RATES[1] = 0.1001;
RATES[2] = 0.1001;
RATES[3] = 0.1001;
RATES[4] = 0.1001;
}
void
computeResiduals(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
                 double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
resid[0] = RATES[0] -  CONSTANTS[2]*( CONSTANTS[1]*STATES[0] - ( CONSTANTS[3]*pow(STATES[0] - CONSTANTS[4], 2.00000)*ALGEBRAIC[2]+ALGEBRAIC[6]));
resid[1] = RATES[1] - (ALGEBRAIC[4] - STATES[1])/CONSTANTS[6];
resid[2] = RATES[2] - (ALGEBRAIC[8] - STATES[2])/CONSTANTS[9];
resid[3] = RATES[3] - (STATES[2] - STATES[3])/CONSTANTS[9];
resid[4] = RATES[4] - (ALGEBRAIC[0] - STATES[4])/CONSTANTS[10];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
}
void
computeEssentialVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] =  CONSTANTS[0]*CONSTANTS[1]*pow(STATES[0], 4.00000);
ALGEBRAIC[2] = (CONDVAR[2]>0.00000 ? 1.00000 : 0.00000);
ALGEBRAIC[3] = (CONDVAR[3]>0.00000 ? 1.00000 : 0.00000);
ALGEBRAIC[4] =  (STATES[0] - CONSTANTS[5])*ALGEBRAIC[3];
ALGEBRAIC[1] = (CONDVAR[0]<0.00000 ? 0.00000 : CONDVAR[1]>0.00000 ? 0.00000 : 1.00000 -  1.30612*(STATES[0] - 1.12500)*(STATES[0] - 1.12500));
ALGEBRAIC[6] =  STATES[3]*ALGEBRAIC[1];
ALGEBRAIC[5] = (ALGEBRAIC[4] - STATES[1])/CONSTANTS[6];
ALGEBRAIC[7] = (CONDVAR[4]>0.00000 ? 1.00000 : 0.00000);
ALGEBRAIC[8] =  CONSTANTS[8]*(1.00000 - exp(- ( CONSTANTS[7]*ALGEBRAIC[5])))*ALGEBRAIC[7];
}
void
getStateInformation(double* SI)
{
SI[0] = 1.0;
SI[1] = 1.0;
SI[2] = 1.0;
SI[3] = 1.0;
SI[4] = 1.0;
}
void
computeRoots(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
             double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
CONDVAR[0] = STATES[0] - 0.250000;
CONDVAR[1] = STATES[0] - 2.00000;
CONDVAR[2] = STATES[0] - CONSTANTS[4];
CONDVAR[3] = STATES[0] - CONSTANTS[5];
CONDVAR[4] = ALGEBRAIC[5] - 0.00000;
}