Randomize images as textures in 3D solids

Question

Good, I have 30 solids and I have a different image for each of them. I created one array for the images, and if you choose to use the same image at all (as I left here in the code, use the bandeira [0]) he runs and everything is fine!

I now want to make one Random running through the array of the images and that assigns a different image to each of the solids, but for some reason when I tried to make (int index = int(random(0, bandeira.length)); - and take the index in place of [0]) he continues to create solids all with the same image.

MAIN

int numPaises = 30;

float theta = 0;
PImage logo, chao;
PShape pessoa;

Paises [] solidos = new Paises [numPaises];  //Array solidos!

PImage[] bandeira = new PImage[30];


void setup() {

  bandeira[0] = loadImage("portugal.jpg");
  bandeira[1] = loadImage("espanha.jpg");
  bandeira[2] = loadImage("franca.jpg");
  bandeira[3] = loadImage("italia.jpg");
  bandeira[4] = loadImage("inglaterra.jpg");
  bandeira[5] = loadImage("alemanha.jpg");
  bandeira[6] = loadImage("brasil.jpg");
  bandeira[7] = loadImage("estadosUnidos.jpg");
  bandeira[8] = loadImage("china.jpg");
  bandeira[9] = loadImage("russia.jpg");
  bandeira[10] = loadImage("quenia.jpg");
  bandeira[11] = loadImage("argelia.jpg");
  bandeira[12] = loadImage("africaSul.jpg");
  bandeira[13] = loadImage("armenia.jpg");
  bandeira[14] = loadImage("austria.jpg");
  bandeira[15] = loadImage("bahamas.jpg");
  bandeira[16] = loadImage("belgica.jpg");
  bandeira[17] = loadImage("benin.jpg");
  bandeira[18] = loadImage("bulgaria.jpg");
  bandeira[19] = loadImage("chile.jpg");
  bandeira[20] = loadImage("congo.jpg");
  bandeira[21] = loadImage("cuba.jpg");
  bandeira[22] = loadImage("filandia.jpg");
  bandeira[23] = loadImage("jamaica.jpg");
  bandeira[24] = loadImage("noruega.jpg");

  size (1200, 650, P3D);

  for (int j=0; j < solidos.length; j++) {
    float angle = j * TWO_PI / numPaises;
    float x = 0 + 2000 * cos(angle);  
    float z = 0 + 2000 * sin(angle);
    int index = int(random(0, bandeira.length));     // *******
    solidos[j] = new Paises(x, 700, z, bandeira[0]);
  }
}

void draw() {

  background (0);

  scale(0.8); //escala de visão
  translate(700, 0, -3500);

  for (int j =0; j < solidos.length; j++) {
    solidos[j].render();
  }

  theta += 0.020;
}

CLASS COUNTRIES

class Paises {
  float x, y, z;
  float w, h, d;

  //CONSTRUTOR

  Paises(float nx, float ny, float nz, PImage img ) {
    x =nx;
    y = ny;
    z =nz;
    w= random(130, 200);
    h= random(400, 500);
    d= random(130, 200);

    noStroke();

    pessoa = createShape(BOX, w, h, d);
    pessoa.setTexture(img);
  }

  void render() {
    pushMatrix();
    rotateY(theta);
    translate(x, y-h/2, z);
    shape(pessoa);
    //box(w, h, d);
    popMatrix();
  }
}

Answer 1

The problem is that the way pessoa had been declared, the class was overwriting its value to each instance.

It is already working correctly, just move the declaration of pessoa inside class:

class Paises {

  PShape pessoa;
  float x, y, z;
  float w, h, d;

in the setup() gets like this:

int index = int(random(0, bandeira.length));     
solidos[j] = new Paises(x, 700, z, bandeira[index]);