IntList / variable scope definition

empedokles

I have some problems with IntList (maybe variable scope?) in following code:

    PImage[] all_icons = new PImage[50];
    IntList story_cubes;

    void setup()
    {
      // load the image  from file
      for ( int i = 0; i< all_icons.length; i++ ) 
      {
        all_icons[i] = loadImage( i + ".png" );   // make sure images "0.jpg" to "11.jpg" exist
      }
      size(300, 300);
      background(255);
      dice_cup();
    }

    void draw()
    {
      // display the image
      imageMode(CENTER);
      for ( int i = 0; i< 5; i++ ) 
      {
        image(all_icons[story_cubes.get(i)], 50 + (i * 40), height/2);
      }
    }

    void mousePressed()
    {
      dice_cup();
    }

    void dice_cup() {
      story_cubes = new IntList();
      int x;
      x = random(5);
      story_cubes.add(x);
      return story_cubes;
    }

P.S.: Is there a way to println anything in JavaScript-mode?

GoToLoop

For starters, your program can't even be compiled in Java Mode.
And if you wanna use JavaScript Mode, you gotta forget anything from Processing 2's new features, like IntList!

empedokles

What do I have to use? Unfortunately it isn't mentioned in the reference that you can't use it..

GoToLoop

Traditional ArrayList<Integer>. :P

empedokles

Like:

PImage[] all_icons = new PImage[6];
ArrayList<int> story_cubes;

? Won't compile.

GoToLoop

A Java's Collection, such as an ArrayList, can't store primitive values such as an int! :-O
We gotta use the corresponding wrapper class. For example, instead of int, we'd use Integer! 3:-O

empedokles

Whoa, Processing is complicated. So I have to write: ArrayList<integer> story_cubes; and it should work?

empedokles

Okay I consideraly moved on. I get an "Unexpected token: int" now. Everything works when I comment out the while loop of void dice_cup(). What's the problem? Again some type conflict? Tipps for simplyfication?:

PImage[] all_icons = new PImage[6];
ArrayList <Integer> story_cubes;

void setup()
{
  // load the image  from file
  for ( int i = 0; i< all_icons.length; i++ ) 
  {
    all_icons[i] = loadImage( i + ".png" );   // make sure images "0.jpg" to "11.jpg" exist
  }
  size(300, 300);
  background(255);
  dice_cup();
}

void draw()
{
  background(255);
  imageMode(CENTER); // display the icons
  for ( int i = 0; i< story_cubes.size(); i++ ) 
  {
    image(all_icons[story_cubes.get(i)], 50 + (i * 50), height/2);
  }
}

void mouseReleased()
{
  dice_cup();
}

void dice_cup() {
  story_cubes = new ArrayList <Integer>();
  int x;
  x = zufallszahl();
  story_cubes.add(x);
  while (story_cubes.size() < 5) {
    x = zufallszahl();
    if (story_cubes.contains(x)) {  
      story_cubes.add(x);
    }
  println(story_cubes);
}

int zufallszahl() {
  return int(random(5));
}

Poersch

You forgot to close dice_cup()'s code block. Just add one } after line 42 and the code will compile.

empedokles

Thanks. Why does conversion int and the Java Integer type work in this instance?

Poersch

This type of automatic casting is called autoboxing (and here a german link). Autoboxing automatically wraps an Integer object around your primitive int.