/*!
 * @file plane_emitter.h
 * Definition of a PlaneEmitter
 */

#ifndef _PLANE_EMITTER_H
#define _PLANE_EMITTER_H

#include "particle_emitter.h"

#include "vector2D.h"

#define PLANE_EMITTER_DEFAULT_SIZE Vector2D(1.0f, 1.0f)

//! A class to handle a Plane Emitter.
/**
 * A Plane Emitter is a special kind of emitter, that has the (underlying) PNode
 * at its center, and from there on is a Plane in the Direction of the PNode
 * out around size in the corresponding directions in x and z
 */
class PlaneEmitter : public ParticleEmitter
{
  ObjectListDeclaration(PlaneEmitter);

  friend class ParticleSystem;
public:
  PlaneEmitter(const Vector2D& size = PLANE_EMITTER_DEFAULT_SIZE,
               float emissionRate = PARTICLE_EMITTER_DEFAULT_EMISSION_RATE,
               float velocity = PARTICLE_EMITTER_DEFAULT_VELOCITY,
               float angle = PARTICLE_EMITTER_DEFAULT_SPREAD);
  PlaneEmitter(const TiXmlElement* root);
  virtual ~PlaneEmitter();

  virtual void loadParams(const TiXmlElement* root);

  void setSize(float x, float y);
  void setSize(const Vector2D& size) { this->setSize(size.x, size.y); };

protected:
  virtual void emitParticles(unsigned int count) const;

private:
  void init();

private:
  Vector2D      size;
};

#endif /* _PLANE_EMITTER_H */