Particle.h

///
/// A particle
///
 
#ifndef __PARTICLE_H__
#define __PARTICLE_H__
 
// Engine include.
#include "Object.h"
 
namespace df {
 
/// Constants.
const int NO_SPREAD=0;  // Particles spread.
 
/// Particle types.
enum ParticleType {
  UNDEFINED_PARTICLE_TYPE = -1,
  SMOKE,
  SPARKS,
  RINGS,
  FIREWORKS,
};
 
/// Particle classes.
enum ParticleClass {
  UNDEFINED_PARTICLE_CLASS = -1,
  PARTICLE,
  FIREWORK,
};
 
/// Directions.
enum Direction {
  UNDEFINED_DIRECTION = -1,
  UP,
  DOWN,
  LEFT, 
  RIGHT,
};
 
class Particle : public Object {
 
 private:
  int m_age;                    ///< Age to live (in ticks).
 
 public:
  /// Create particle with size (pixels), age (in ticks), opacity
  /// (0-255) and rgb color.
  Particle(float size, int age, unsigned char opacity, 
           unsigned char r, unsigned char g, unsigned char b);
 
  /// Set age.
  void setAge(int new_age);
 
  /// Get age.
  int getAge() const;
 
  /// Handle step events.
  /// Return 0 if ignored, else 1.
  int eventHandler(const Event *p_e) override;
 
  /// Log warning if trying to serialize particles.
  virtual std::string serialize(std::string attr="") override;
 
  /// Log warning if trying to deserialize particles.
  virtual int deserialize(std::string s) override;
};
 
} // end of namespace df
#endif //__PARTICLE_H__