Looking for more resources about ArrayLists

Processing Beginners
19

here is a Sketch that adds cells as discussed (almost)

Chrisir


ArrayList<PVector>resizeableGrid = new ArrayList();
float tile;

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

  tile = width/3;

  for (float x = 0; x <= width; x+=tile) {
    for (float y = 0; y <= height; y+=tile) {
      PVector pv = new PVector(x, y);
      resizeableGrid.add(pv);
    }
  }
}

void draw() {
  background(255);
  for (PVector pv : resizeableGrid) {
    stroke(0);
    rect(pv.x, pv.y, tile, tile);
  }
}

void mousePressed() {
  //   *** count thru array
  for (int i = 0; i < resizeableGrid.size(); i++) {
    PVector pv = resizeableGrid.get(i);

    if (mouseX>pv.x&&
      mouseX<pv.x+tile&&
      mouseY>pv.y&&
      mouseY<pv.y+tile) {
      // add a cell
      PVector pvNew = new PVector (pv.x+tile/2, pv.y);
      resizeableGrid.add (pvNew);
      return;
    }//if
  }//for
}//func
//
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