text: // Copyright (C) 2002-2012 Nikolaus Gebhardt
  // This file is part of the "Irrlicht Engine".
  // For conditions of distribution and use, see copyright notice in irrlicht.h
  
  #ifndef __C_PARTICLE_ATTRACTION_AFFECTOR_H_INCLUDED__
  #define __C_PARTICLE_ATTRACTION_AFFECTOR_H_INCLUDED__
  
  #include "IrrCompileConfig.h"
  #ifdef _IRR_COMPILE_WITH_PARTICLES_
  
  #include "IParticleAttractionAffector.h"
  
  namespace irr
  {
  namespace scene
  {
  
  //! Particle Affector for attracting particles to a point
  class CParticleAttractionAffector : public IParticleAttractionAffector
  {
  public:
  
  	CParticleAttractionAffector(
  		const core::vector3df& point = core::vector3df(), f32 speed = 1.0f,
  		bool attract = true, bool affectX = true,
  		bool affectY = true, bool affectZ = true );
  
  	//! Affects a particle.
  	virtual void affect(u32 now, SParticle* particlearray, u32 count) _IRR_OVERRIDE_;
  
  	//! Set the point that particles will attract to
  	virtual void setPoint( const core::vector3df& point ) _IRR_OVERRIDE_ { Point = point; }
  
  	//! Set the speed, in game units per second that the particles will attract to the specified point
  	virtual void setSpeed( f32 speed ) _IRR_OVERRIDE_ { Speed = speed; }
  
  	//! Set whether or not the particles are attracting or detracting
  	virtual void setAttract( bool attract ) _IRR_OVERRIDE_ { Attract = attract; }
  
  	//! Set whether or not this will affect particles in the X direction
  	virtual void setAffectX( bool affect ) _IRR_OVERRIDE_ { AffectX = affect; }
  
  	//! Set whether or not this will affect particles in the Y direction
  	virtual void setAffectY( bool affect ) _IRR_OVERRIDE_ { AffectY = affect; }
  
  	//! Set whether or not this will affect particles in the Z direction
  	virtual void setAffectZ( bool affect ) _IRR_OVERRIDE_ { AffectZ = affect; }
  
  	//! Get the point that particles are attracted to
  	virtual const core::vector3df& getPoint() const _IRR_OVERRIDE_ { return Point; }
  
  	//! Get the speed that points attract to the specified point
  	virtual f32 getSpeed() const _IRR_OVERRIDE_ { return Speed; }
  
  	//! Get whether or not the particles are attracting or detracting
  	virtual bool getAttract() const _IRR_OVERRIDE_ { return Attract; }
  
  	//! Get whether or not the particles X position are affected
  	virtual bool getAffectX() const _IRR_OVERRIDE_ { return AffectX; }
  
  	//! Get whether or not the particles Y position are affected
  	virtual bool getAffectY() const _IRR_OVERRIDE_ { return AffectY; }
  
  	//! Get whether or not the particles Z position are affected
  	virtual bool getAffectZ() const _IRR_OVERRIDE_ { return AffectZ; }
  
  	//! Writes attributes of the object.
  	virtual void serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const _IRR_OVERRIDE_;
  
  	//! Reads attributes of the object.
  	virtual void deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options) _IRR_OVERRIDE_;
  
  private:
  
  	core::vector3df Point;
  	f32 Speed;
  	bool AffectX;
  	bool AffectY;
  	bool AffectZ;
  	bool Attract;
  	u32 LastTime;
  };
  
  } // end namespace scene
  } // end namespace irr
  
  #endif // _IRR_COMPILE_WITH_PARTICLES_
  
  #endif // __C_PARTICLE_ATTRACTION_AFFECTOR_H_INCLUDED__
  
  