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#pragma once
#include <cstdint>
#include "types.h"
namespace crepe {
/**
* \brief Represents a particle in the particle emitter.
*
* This class stores information about a single particle, including its position, velocity,
* lifespan, and other properties. Particles can be updated over time to simulate movement and
* can also be reset or stopped.
*/
class Particle {
public:
//! Position of the particle in 2D space.
vec2 position;
//! Velocity vector indicating the speed and direction of the particle.
vec2 velocity;
//! Accumulated force affecting the particle over time.
vec2 force_over_time;
//! Total lifespan of the particle in milliseconds.
float lifespan;
//! Active state of the particle; true if it is in use, false otherwise.
bool active = false;
//! The time the particle has been alive, in milliseconds.
float time_in_life = 0;
//! The angle at which the particle is oriented or moving.
float angle = 0;
/**
* \brief Resets the particle with new properties.
*
* This method initializes the particle with a specific lifespan, position, velocity, and
* angle, marking it as active and resetting its life counter.
*
* \param lifespan The lifespan of the particle in amount of updates.
* \param position The starting position of the particle.
* \param velocity The initial velocity of the particle.
* \param angle The angle of the particle's trajectory or orientation.
*/
void reset(unsigned int lifespan, const vec2 & position, const vec2 & velocity,
float angle);
/**
* \brief Updates the particle's state.
*
* Advances the particle's position based on its velocity and applies accumulated forces.
* Deactivates the particle if its lifespan has expired.
* \param dt The amount of fixed delta time that has passed.
*/
void update(double dt);
/**
* \brief Stops the particle's movement.
*
* Sets the particle's velocity to zero, effectively halting any further
* movement.
*/
void stop_movement();
};
} // namespace crepe
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