int nb=20;
Polygones[] polygones=new Polygones[nb];
void setup(){
  size(900,700);
  for(int i=0;i<nb;i++)
  {
    polygones[i]=new Polygones();
  }
}
  void draw(){
    background(50,0,100,5);
    for(int i=0;i<nb;i++)
    {
       polygones[i].deplacement();
    polygones[i].polygones();
       polygones[i].rebond_mur();
    }
    for(int i=0;i<nb;i++)
    {
      for(int j=i+1;j<nb;j++)
      {
        polygones[i].collision(polygones[j]);
      }
    }
  }
  class Polygones{
    PVector position;
    PVector deplacement;
    float nb_face;
    float rayon;
    color couleur;
  
    Polygones(){
      position=new PVector(random(width),random(height));
      deplacement=new PVector(random(-1,2),random(-2,3));
      nb_face=random(3,8);
      rayon=random(20,60);
  couleur=color(random(0,255),random(0,255),random(0,255));
    }
    void deplacement(){
      position.add(deplacement);
    }
    
    void polygones(){
      float angle=TWO_PI/nb_face;
      beginShape();
     
      for(float a=0;a<TWO_PI;a+=angle)
      {
        float sx=position.x+cos(a)*rayon;
        float sy=position.y+sin(a)*rayon;
        fill(couleur);
        vertex(sx,sy);
      }
      endShape(CLOSE);
      
    }
    
    void rebond_mur(){
      
      if(position.x<0+rayon||position.x>width-rayon)
      {
      deplacement.x *=-1;
      }
      if(position.y<0+rayon||position.y>height-rayon)  
      {
           deplacement.y *=-1;
      }
    }
    void collision(Polygones j){
      float distance=position.dist(j.position);
      if(distance<=rayon)
      {
      
     deplacement.x=deplacement.x*-1;
       deplacement.y=deplacement.y*-1;    
    
  }
    }
  }