#include "atkui/framework.h"
#include "atk/toolkit.h"
#include <random>
#include <functional>

using namespace glm;
using namespace atk;

class ParticleExample : public atkui::Framework
{
public:
   ParticleExample() : atkui::Framework(atkui::Orthographic) // calls base class ctor
   {
   }

   virtual void setup() 
   {
      _pos = vec3(0,0,0);
      _velocity = vec3(100,100,0);
      _gravity = vec3(0,-100,0);
      _mass = 2.0;
   }

   virtual void update() 
   {
      vec3 accumForces = _gravity;
      vec3 acc =  accumForces / _mass; 

      _pos = _pos + dt() * _velocity;
      _velocity = _velocity + dt() * acc;
   }

   virtual void scene() //overrides draw
   {
      update();
      setColor(vec3(1,0,0));
      drawSphere(_pos, 10);
   }

private:
   vec3 _gravity;
   vec3 _velocity;
   vec3 _pos;
   float _mass;
};

int main(int argc, char** argv)
{
   ParticleExample viewer;
   viewer.run();
   return 0;
}