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Game State System

Source: client/engine/systems/SystemsFunctions/GameStateSystem.cpp

Purpose: Handle scene transitions by calling DestroyScene and InitScene hooks when the next state changes.

Components used:

  • SceneManagement (current, next, scenes: std::unordered_map<std::string, std::shared_ptr<Scene_A>>)

Behavior​

  • Skip if next is empty or identical to current.
  • If the current scene exists in scenes, call DestroyScene(reg) to clean up the outgoing state.
  • If the target scene exists in scenes, call InitScene(reg) to initialize the new state.
  • Update current with next, then reset next to an empty string to avoid unintended reloads.

Main signature​

void GameStateSystem(Eng::registry &reg,
    Eng::sparse_array<Component::SceneManagement> &sceneManagements);

Notes​

  • Scene_A defines the InitScene and DestroyScene hooks invoked by this system.
  • The scenes map must be prefilled with available scenes and their keys.
  • next must be set by other logic (UI, network, scripts) before this system runs so the transition occurs during the pass.