3D cube AABB - OpenProcessing

mySketch
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var p1, p2, size1, size2;
​
function setup() {
  createCanvas(windowWidth, windowHeight, WEBGL);
  
  p1 = new p5.Vector(0, 0, 0);
  p2 = new p5.Vector(0, 0, 0);
  randomizeSizes();
}
​
function draw() {
  p2.x = map(mouseX, 0, width, -width / 2, width / 2);
  p2.y = map(mouseY, 0, height, -height / 2, height / 2);
  
  background(0);
  
  translate(0, 0, 300);
  rotateX(radians(-15));
  rotateY(radians(35));
  
  push();
    translate(p1.x, p1.y, p1.z);
    fill(255);
    box(size1.x, size1.y, size1.z);
  pop();
  
  push();
    translate(p2.x, p2.y, p2.z);
    fill(255);
    if (checkCollision(p1, p2, size1, size2)) {
      fill(255, 0, 0);
    }
    box(size2.x, size2.y, size2.z);
  pop();
}
​
function mouseClicked() {
  randomizeSizes();
}
​
function mouseWheel(event) {
  p2.z += event.delta * 0.1;
}
​
function checkCollision(p1, p2, size1, size2) {
  if (Math.abs(p1.x - p2.x) < (size1.x + size2.x) * 0.5) {
    if (Math.abs(p1.y - p2.y) < (size1.y + size2.y) * 0.5) {
      if (Math.abs(p1.z - p2.z) < (size1.z + size2.z) * 0.5) {
        return true;
      }
    }
  }
  return false;
}
​
function randomizeSizes() {
  size1 = new p5.Vector(random(10, 100), random(10, 100), random(10, 100));
  size2 = new p5.Vector(random(10, 100), random(10, 100), random(10, 100));
}