80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
#pragma once
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#include <functional>
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#include <memory>
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#include <vector>
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struct Entity;
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/**
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* Shared state for one gameplay scene instance.
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*/
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struct GameContext {
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/**
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* @brief Pointer to the entity list owned by the active gameplay scene.
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*/
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std::vector<std::shared_ptr<Entity>> *entities = nullptr;
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/** @brief World entity (scroll/spawn owner). */
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Entity *worldEntity = nullptr;
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/** @brief Gravity well entity. */
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Entity *wellEntity = nullptr;
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/** @brief Player probe entity. */
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Entity *probeEntity = nullptr;
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/** @brief HUD entity. */
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Entity *hudEntity = nullptr;
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/** @brief Shared horizontal world scroll value. */
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float scrollX = 0.0f;
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/** @brief Optional callback invoked when the probe dies. */
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std::function<void()> onPlayerDeath;
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/** @brief Callbacks fired whenever a collectible is picked up. */
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std::vector<std::function<void(Entity &)>> collectiblePickedListeners;
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/** @brief Callbacks fired whenever meter value changes. */
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std::vector<std::function<void(float, float)>> meterChangedListeners;
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/**
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* Registers a collectible pickup listener.
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*
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* @param listener Callback receiving the collected entity.
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*/
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void AddCollectiblePickedListener(std::function<void(Entity &)> listener) {
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collectiblePickedListeners.push_back(std::move(listener));
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}
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/**
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* Emits collectible pickup event.
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*
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* @param collectible The collected entity.
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*/
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void EmitCollectiblePicked(Entity &collectible) {
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for (auto &listener : collectiblePickedListeners) {
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listener(collectible);
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}
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}
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/**
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* Registers a meter changed listener.
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*
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* @param listener Callback receiving old value then new value.
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*/
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void AddMeterChangedListener(std::function<void(float, float)> listener) {
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meterChangedListeners.push_back(std::move(listener));
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}
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/**
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* Emits meter changed event.
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*
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* @param oldValue Meter value before mutation.
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* @param newValue Meter value after mutation.
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*/
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void EmitMeterChanged(float oldValue, float newValue) {
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for (auto &listener : meterChangedListeners) {
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listener(oldValue, newValue);
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}
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}
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};
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