#pragma once #include <cstdint> #include "System.h" namespace crepe { class ParticleEmitter; class Transform; /** * \brief ParticleSystem class responsible for managing particle emission, updates, and bounds * checking. */ class ParticleSystem : public System { public: using System::System; /** * \brief Updates all particle emitters by emitting particles, updating particle states, and * checking bounds. */ void update() override; private: /** * \brief Emits a particle from the specified emitter based on its emission properties. * * \param emitter Reference to the ParticleEmitter. * \param transform Const reference to the Transform component associated with the emitter. */ void emit_particle(ParticleEmitter & emitter, const Transform & transform); /** * \brief Calculates the number of times particles should be emitted based on emission rate * and update count. * * \param count Current update count. * \param emission Emission rate. * \return The number of particles to emit. */ int calculate_update(int count, double emission) const; /** * \brief Checks whether particles are within the emitter’s boundary, resets or stops * particles if they exit. * * \param emitter Reference to the ParticleEmitter. * \param transform Const reference to the Transform component associated with the emitter. */ void check_bounds(ParticleEmitter & emitter, const Transform & transform); /** * \brief Generates a random angle for particle emission within the specified range. * * \param min_angle Minimum emission angle in degrees. * \param max_angle Maximum emission angle in degrees. * \return Random angle in degrees. */ double generate_random_angle(double min_angle, double max_angle) const; /** * \brief Generates a random speed for particle emission within the specified range. * * \param min_speed Minimum emission speed. * \param max_speed Maximum emission speed. * \return Random speed. */ double generate_random_speed(double min_speed, double max_speed) const; private: //! Counter to count updates to determine how many times emit_particle is // called. unsigned int update_count = 0; //! Determines the lowest amount of emission rate (1000 = 0.001 = 1 particle per 1000 // updates). static constexpr unsigned int MAX_UPDATE_COUNT = 100; }; } // namespace crepe