particleEmitter.h

 
#ifndef PARTICLES_H_DEFINED
#define PARTICLES_H_DEFINED
 
#include "core.h"
#include <Entities\component.h>
#include <Renderer\rectangleShape.h>
#include <Renderer\color.h>
 
namespace rune{
 
class RUNE_ENGINE ParticleEmitter : public Component
{
 
private:
  struct particle
  {
    rune::Vec2 m_pixelPosition;
    rune::Color m_pixelColor; //Color of all particles
    rune::Vec2 m_particleSpeed; //Rate at which particles travel
    //RectangleShape m_particleSprite[4];
    int m_timeExisted; //Time the pixel has existed in milliseconds
  };
 
  const int PARTICLELIMIT = 1000;
  double m_dissolutionRate; //Rate at which particles disappear
 
  rune::Color m_pixelBaseColor; //Starting color, can apply modifiers later
 
  rune::Vec2 m_canvasSize = rune::Vec2(100,100);
 
  rune::Vec2 m_initVel;
  rune::Vec2 m_startPos; //Location at which the particles start
  rune::Vec2 m_gravity; //Influence particle velocities
  
  std::vector<particle> m_particles;
 
  //virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const;
 
public:
  ParticleEmitter(rune::Vec2 startPos, rune::Vec2 initVel, rune::Color color, int dissolutionRate = 5, rune::Vec2 gravity = rune::Vec2(0,0));
  
  void setDissolutionRate(double rate);
 
  void setGravity(rune::Vec2 gravity);
 
  void fuel(int particles);
 
  void update(double dT);
 
  //Set the region that the particle is allowed to move around in.
  void setCanvasSize(rune::Vec2);
 
  //Set the position of the particles emitter.
  void setPosition(rune::Vec2);
 
};
}
 
#endif