/*
   There are a total of 6 entries in the algebraic variable array.
   There are a total of 3 entries in each of the rate and state variable arrays.
   There are a total of 9 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (day).
 * STATES[0] is x1 in component x1 (cell).
 * CONSTANTS[0] is alpha1 in component model_parameters (flux).
 * CONSTANTS[1] is beta1 in component model_parameters (first_order_rate_constant).
 * CONSTANTS[2] is g11 in component model_parameters (dimensionless).
 * ALGEBRAIC[0] is g21 in component model_parameters (dimensionless).
 * STATES[1] is x2 in component x2 (cell).
 * CONSTANTS[3] is alpha2 in component model_parameters (first_order_rate_constant).
 * CONSTANTS[4] is beta2 in component model_parameters (first_order_rate_constant).
 * CONSTANTS[5] is g12 in component model_parameters (dimensionless).
 * CONSTANTS[6] is g22 in component model_parameters (dimensionless).
 * STATES[2] is z in component z (percent).
 * CONSTANTS[7] is k1 in component model_parameters (percent_per_cell_per_day).
 * CONSTANTS[8] is k2 in component model_parameters (percent_per_cell_per_day).
 * ALGEBRAIC[3] is y1 in component y1 (cell).
 * ALGEBRAIC[5] is y2 in component y2 (cell).
 * ALGEBRAIC[2] is x1_bar in component x1_bar (cell).
 * ALGEBRAIC[4] is x2_bar in component x2_bar (cell).
 * ALGEBRAIC[1] is gamma in component model_parameters (dimensionless).
 * RATES[0] is d/dt x1 in component x1 (cell).
 * RATES[1] is d/dt x2 in component x2 (cell).
 * RATES[2] is d/dt z in component z (percent).
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 10.06066;
CONSTANTS[0] = 3;
CONSTANTS[1] = 0.2;
CONSTANTS[2] = 0.5;
STATES[1] = 212.132;
CONSTANTS[3] = 4;
CONSTANTS[4] = 0.02;
CONSTANTS[5] = 1;
CONSTANTS[6] = 0;
STATES[2] = 100.0;
CONSTANTS[7] = 0.24;
CONSTANTS[8] = 0.0017;
}
void
computeRates(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
RATES[1] =  CONSTANTS[3]*pow(STATES[0], CONSTANTS[5])*pow(STATES[1], CONSTANTS[6]) -  CONSTANTS[4]*STATES[1];
ALGEBRAIC[0] = (VOI>=1.00000&&VOI<2.00000 ? 0.150000 : -0.500000);
RATES[0] =  CONSTANTS[0]*pow(STATES[0], CONSTANTS[2])*pow(STATES[1], ALGEBRAIC[0]) -  CONSTANTS[1]*STATES[0];
ALGEBRAIC[1] =  CONSTANTS[5]*ALGEBRAIC[0] -  (1.00000 - CONSTANTS[2])*(1.00000 - CONSTANTS[6]);
ALGEBRAIC[2] =  pow(CONSTANTS[1]/CONSTANTS[0], (1.00000 - CONSTANTS[6])/ALGEBRAIC[1])*pow(CONSTANTS[4]/CONSTANTS[3], ALGEBRAIC[0]/ALGEBRAIC[1]);
ALGEBRAIC[3] = (STATES[0]>ALGEBRAIC[2] ? STATES[0] - ALGEBRAIC[2] : 0.00000);
ALGEBRAIC[4] =  pow(CONSTANTS[1]/CONSTANTS[0], CONSTANTS[5]/ALGEBRAIC[1])*pow(CONSTANTS[4]/CONSTANTS[3], (1.00000 - CONSTANTS[2])/ALGEBRAIC[1]);
ALGEBRAIC[5] = (STATES[1]>ALGEBRAIC[4] ? STATES[1] - ALGEBRAIC[4] : 0.00000);
RATES[2] =  CONSTANTS[8]*ALGEBRAIC[5] -  CONSTANTS[7]*ALGEBRAIC[3];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] = (VOI>=1.00000&&VOI<2.00000 ? 0.150000 : -0.500000);
ALGEBRAIC[1] =  CONSTANTS[5]*ALGEBRAIC[0] -  (1.00000 - CONSTANTS[2])*(1.00000 - CONSTANTS[6]);
ALGEBRAIC[2] =  pow(CONSTANTS[1]/CONSTANTS[0], (1.00000 - CONSTANTS[6])/ALGEBRAIC[1])*pow(CONSTANTS[4]/CONSTANTS[3], ALGEBRAIC[0]/ALGEBRAIC[1]);
ALGEBRAIC[3] = (STATES[0]>ALGEBRAIC[2] ? STATES[0] - ALGEBRAIC[2] : 0.00000);
ALGEBRAIC[4] =  pow(CONSTANTS[1]/CONSTANTS[0], CONSTANTS[5]/ALGEBRAIC[1])*pow(CONSTANTS[4]/CONSTANTS[3], (1.00000 - CONSTANTS[2])/ALGEBRAIC[1]);
ALGEBRAIC[5] = (STATES[1]>ALGEBRAIC[4] ? STATES[1] - ALGEBRAIC[4] : 0.00000);
}