caja vector [] = new caja [20];

float a;

void setup(){
 size(500,500,P3D);
 inicializacion();
}

void inicializacion(){
   for(int i=0;i<vector.length;i++){
    vector[i]=new caja(random(height));
  }
}

void draw(){
  if(keyPressed == true){
    inicializacion();
  }

  if(mousePressed == true){
    for(int j=0;j<vector.length;j++){
      // inicia ordenamiento B
        for(int i=0;i<vector.length-1;i++){
          if(vector[i].tam<vector[i+1].tam){
            float aux=vector[i].tam;
            vector[i].tam=vector[i+1].tam;
            vector[i+1].tam=aux;
          }
        }
      }
  } else{mostrar(); }
}

void mostrar(){
  background(0);
  for(int i=0;i<vector.length;i++){
    pushMatrix();
    lights();
      translate(map(i,0,vector.length,width/vector.length,width),height/2);
      strokeWeight(1);
      fill(vector[i].c);
      rotateX(a);
      rotateY(a);
      rotateZ(a);
      stroke(vector[i].c);
      box(map(vector[i].tam,0,height,0,height/vector.length));
      a=a+0.001;
    popMatrix();

  }

}