Every element of a 3D array

I know how to do this the long way, visit every element of a 3D array, but I am wondering if there is a shortcut and optimized way to do the following:

for (int i = 0; i < CPS; i++) { for (int j = 0; j < CPS; j++) { for (int k = 0; k < CPS; k++) { box[i][j][k].draw(); }}}

I am looking for something like this:

for every element of box[][][] {box[][][].draw;


box[(int i = 0; i < CPS; i++)][(int j = 0; j < CPS; j++)][(int k = 0; k < CPS; k++)].draw();

OR the best yet would be


Any and all suggestion would be appreciated.



  • There isn't an automatic out-of-the-box way to do this in Processing.

    You might google something like "java flatten arrays" for a ton of results.

    But just using the nested for loop is probably the easiest option. Maybe put this in a function so it looks like a one-liner to the rest of your code.

  • make a class Cube and say


  • edited October 2016
    // forum.Processing.org/two/discussion/18708/
    // every-element-of-a-3d-array#Item_3
    // GoToLoop (2016-Oct-25)
    final int DIM = 3;
    final PVector[][][] three = new PVector[DIM][DIM][DIM];
    // Fill 3D array:
    for (PVector[][] two : three)  for (PVector[] one : two)
      for (int i = 0; i < one.length; one[i++] = PVector.random3D(this));
    // Visit 3D array:
    int i = 0;
    for (PVector[][] two : three)  for (PVector[] one : two)
      for (PVector vec : one)  println(i++, vec);
  • Thank you GoToLoop, let me try this and doo some metrics and see how it goes.

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