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#pragma once
#include "Sprite.h"
#include "../Primitives/Vector2.h"
#include "../Primitives/Color.h"
namespace nCine
{
class Texture;
/// Renders a single particle
class Particle : public Sprite
{
friend class ParticleSystem;
public:
/// Current particle remaining life in seconds
float life_;
/// Initial particle remaining life
float startingLife; // for affectors
/// Initial particle rotation
float startingRotation; // for affectors
/// Current particle velocity vector
Vector2f velocity_;
/// Flag indicating if particle transformations are in local space or not
bool inLocalSpace_;
/// Constructor for a particle with a parent and texture, positioned in the relative origin
Particle(SceneNode* parent, Texture* texture);
Particle& operator=(const Particle&) = delete;
Particle(Particle&&) = default;
Particle& operator=(Particle&&) = default;
/// Returns true if the particle is still alive
inline bool isAlive() const {
return life_ > 0.0f;
}
protected:
/// Returns a copy of this object
/*! \note This method is protected as it should only be called by a `ParticleSystem` */
inline Particle clone() const {
return Particle(*this);
}
/// Protected copy constructor used to clone objects
Particle(const Particle& other);
private:
/// Initializes a particle with initial life, position, velocity and rotation
void init(float life, Vector2f pos, Vector2f vel, float rot, bool inLocalSpace);
/// Updates particle data after the specified amount of seconds has passed
void OnUpdate(float timeMult) override;
/// Custom transform method to allow independent position from parent
void transform() override;
};
}
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