How do you use a specific element from a returned array that comes from a function?

Scott06

Hi, I've got a question. I have a custom defined function called Projection, that will return an array with two values. The first value is the X-coordinate and the second value is the Y-coordinate. I want to know how to be able to use the returned X-coordinate in a calculation. Thanks!

Chrisir

Show your code

if the array is called a1 you want to use

a1[0] + 300

If you‘d return a PVector it would be pv.x + 300

Chrisir

There’s also a new forum

Chrisir

Without seeing your code my answer is a little generic

Also see reference and tutorials on arrays

GoToLoop

void setup() {
  final int x = randomXY()[0];
  println("x: " + x);
  exit();
}

int[] randomXY() {
  final int x = (int) random(width);
  final int y = (int) random(height);
  return new int[] { x, y };
}

Chrisir

similar version to the above version

void setup() {
  size(600, 600);
}

void draw() {
  int[] listXY = randomXY();

  println("x: " +
    listXY[0]);

  noLoop();
}

// --------------------------------------------------------------

int[] randomXY() {
  // returns an array with x,y (better use type PVector though) 
  int x = (int) random(width);
  int y = (int) random(height);

  int[] listOfResult = new int[2];

  listOfResult[0] = x;
  listOfResult[1] = y;

  return listOfResult;
}
//