/*
   There are a total of 4 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 14 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (min).
 * STATES[0] is Z in component Ca (uM).
 * STATES[1] is Y in component Ca (uM).
 * CONSTANTS[13] is V_in in component V_in (uM_per_min).
 * ALGEBRAIC[0] is V_2 in component V_2 (uM_per_min).
 * ALGEBRAIC[3] is V_3 in component V_3 (uM_per_min).
 * CONSTANTS[0] is K_f in component Ca (per_min).
 * CONSTANTS[1] is K in component Ca (per_min).
 * CONSTANTS[2] is beta in component Ca_flux (dimensionless).
 * CONSTANTS[3] is v_0 in component V_in (uM_per_min).
 * CONSTANTS[4] is v_1 in component V_in (uM_per_min).
 * CONSTANTS[5] is V_M2 in component V_2 (uM_per_min).
 * CONSTANTS[6] is K_2 in component V_2 (uM).
 * CONSTANTS[7] is K_y in component V_3 (uM).
 * CONSTANTS[8] is V_M3 in component V_3 (uM_per_min).
 * ALGEBRAIC[2] is R_plus in component Ca_channels (dimensionless).
 * STATES[2] is rho in component Ca_channels (dimensionless).
 * ALGEBRAIC[1] is gamma in component gamma (dimensionless).
 * CONSTANTS[9] is k_d in component Ca_channels (per_min).
 * CONSTANTS[10] is k_r in component Ca_channels (per_min).
 * CONSTANTS[11] is a in component gamma (per_min).
 * CONSTANTS[12] is d in component gamma (per_min).
 * RATES[0] is d/dt Z in component Ca (uM).
 * RATES[1] is d/dt Y in component Ca (uM).
 * RATES[2] is d/dt rho in component Ca_channels (dimensionless).
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 0.3;
STATES[1] = 2.7;
CONSTANTS[0] = 1;
CONSTANTS[1] = 10;
CONSTANTS[2] = 1;
CONSTANTS[3] = 1;
CONSTANTS[4] = 1;
CONSTANTS[5] = 6.5;
CONSTANTS[6] = 0.1;
CONSTANTS[7] = 0.2;
CONSTANTS[8] = 50;
STATES[2] = 0.2;
CONSTANTS[9] = 5000.0;
CONSTANTS[10] = 5.0;
CONSTANTS[11] = 10000.0;
CONSTANTS[12] = 100.0;
CONSTANTS[13] = CONSTANTS[3]+ CONSTANTS[4]*CONSTANTS[2];
}
void
computeRates(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
RATES[2] = - ( CONSTANTS[9]*pow(STATES[0], 4.00000)*STATES[2]*1.00000)+ CONSTANTS[10]*(1.00000 - STATES[2]);
ALGEBRAIC[0] =  CONSTANTS[5]*(pow(STATES[0], 2.00000)/(pow(CONSTANTS[6], 2.00000)+pow(STATES[0], 2.00000)));
ALGEBRAIC[1] =  (CONSTANTS[11]/CONSTANTS[12])*pow(STATES[0], 4.00000)*1.00000;
ALGEBRAIC[2] =  ALGEBRAIC[1]*(STATES[2]/(1.00000+ALGEBRAIC[1]));
ALGEBRAIC[3] =  CONSTANTS[2]*ALGEBRAIC[2]*CONSTANTS[8]*(pow(STATES[1], 2.00000)/(pow(CONSTANTS[7], 2.00000)+pow(STATES[1], 2.00000)));
RATES[0] = (CONSTANTS[13] - ALGEBRAIC[0])+ALGEBRAIC[3]+( CONSTANTS[0]*STATES[1] -  CONSTANTS[1]*STATES[0]);
RATES[1] = (ALGEBRAIC[0] - ALGEBRAIC[3]) -  CONSTANTS[0]*STATES[1];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] =  CONSTANTS[5]*(pow(STATES[0], 2.00000)/(pow(CONSTANTS[6], 2.00000)+pow(STATES[0], 2.00000)));
ALGEBRAIC[1] =  (CONSTANTS[11]/CONSTANTS[12])*pow(STATES[0], 4.00000)*1.00000;
ALGEBRAIC[2] =  ALGEBRAIC[1]*(STATES[2]/(1.00000+ALGEBRAIC[1]));
ALGEBRAIC[3] =  CONSTANTS[2]*ALGEBRAIC[2]*CONSTANTS[8]*(pow(STATES[1], 2.00000)/(pow(CONSTANTS[7], 2.00000)+pow(STATES[1], 2.00000)));
}