/*
   There are a total of 1 entries in the algebraic variable array.
   There are a total of 4 entries in each of the rate and state variable arrays.
   There are a total of 4 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (second).
 * STATES[0] is x1 in component insulin (nanomolar).
 * ALGEBRAIC[0] is scatchard in component insulin (dimensionless).
 * CONSTANTS[0] is k1 in component rate_constants (second_order_rate_constant).
 * CONSTANTS[1] is k1_ in component rate_constants (first_order_rate_constant).
 * CONSTANTS[2] is k2_ in component rate_constants (first_order_rate_constant).
 * STATES[1] is x2 in component unbound_receptor (nanomolar).
 * STATES[2] is x3 in component single_bound_receptor (nanomolar).
 * STATES[3] is x4 in component double_bound_receptor (nanomolar).
 * CONSTANTS[3] is k2 in component rate_constants (second_order_rate_constant).
 * RATES[0] is d/dt x1 in component insulin (nanomolar).
 * RATES[1] is d/dt x2 in component unbound_receptor (nanomolar).
 * RATES[2] is d/dt x3 in component single_bound_receptor (nanomolar).
 * RATES[3] is d/dt x4 in component double_bound_receptor (nanomolar).
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 1000;
CONSTANTS[0] = 1000000;
CONSTANTS[1] = 0.0004;
CONSTANTS[2] = 0.04;
STATES[1] = 0.1;
STATES[2] = 0.0;
STATES[3] = 0.0;
CONSTANTS[3] = 1000000;
}
void
computeRates(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
RATES[0] = (( CONSTANTS[1]*STATES[2] -  CONSTANTS[0]*STATES[0]*STATES[1])+ CONSTANTS[2]*STATES[3]) -  CONSTANTS[3]*STATES[0]*STATES[2];
RATES[1] =  CONSTANTS[1]*STATES[2] -  CONSTANTS[0]*STATES[0]*STATES[1];
RATES[2] = (( CONSTANTS[0]*STATES[0]*STATES[1] -  CONSTANTS[1]*STATES[2])+ CONSTANTS[2]*STATES[3]) -  CONSTANTS[3]*STATES[0]*STATES[2];
RATES[3] =  CONSTANTS[3]*STATES[0]*STATES[2] -  CONSTANTS[2]*STATES[3];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] = (STATES[2]+STATES[3])/STATES[0];
}