ecm_Csp_update.cpp

/**
 * ecm_Csp_update
 *
 * Purpose:
 *   Refresh each ECM voxel concentration array from the global macro property buffer.
 *
 * Inputs:
 *   - Agent variable: grid_lin_id
 *   - Environment macro property: C_SP_MACRO
 *
 * Outputs:
 *   - Updated per-agent C_sp array
 *
 * Notes:
 *   This is the synchronization bridge from macro-level concentration updates
 *   back into per-agent concentration variables.
 */
FLAMEGPU_AGENT_FUNCTION(ecm_Csp_update, flamegpu::MessageNone, flamegpu::MessageNone) {
  
  //Get agent variables (agent calling the function)
  int agent_id = FLAMEGPU->getVariable<int>("id");
  int agent_grid_lin_id = FLAMEGPU->getVariable<int>("grid_lin_id");

  //printf("ECM agent %d at grid_lin_id %d updating C_sp from MACRO property \n", agent_id, agent_grid_lin_id);

  const uint8_t N_SPECIES = 2; // WARNING: this variable must be hard coded to have the same value as the one defined in the main python function.
  const uint32_t ECM_POPULATION_SIZE = 9261; // WARNING: this variable must be hard coded to have the same value as the one defined in the main python function.

  auto C_SP_MACRO = FLAMEGPU->environment.getMacroProperty<float, N_SPECIES, ECM_POPULATION_SIZE>("C_SP_MACRO");

  for (int i = 0; i < N_SPECIES; i++) {
    FLAMEGPU->setVariable<float, N_SPECIES>("C_sp", i, (float)C_SP_MACRO[i][agent_grid_lin_id]);
  }

  return flamegpu::ALIVE;
}