Detecting collisions between multiple moving objects in Three.js

Question

Detecting collisions between multiple moving objects in Three.js

Currently, I have several objects that are moving forward randomly using the following code:

model.lookAt(position_x, 0, position_z);

setInterval(function(){
   model.translateZ(0.015);
}, 10);

However, I am facing an issue where these objects might crash into each other during these movements. I came across a solution that suggests using bounding boxes for collision detection, but it only seems to work for collisions between two objects:

How to detect collision between two objects in JavaScript with Three.js?

My question is, is it possible to implement collision detection for multiple objects, each having their own set of collision parameters?

Thank you for your help!

javascript three.js

Answer 1

Answer №1

To accomplish this task, follow these steps:

var objA = ...your initial object...
var objB = ...your second object...
var objC = ...your initial object...
var objD = ...your second object...

box1 = new THREE.Box3().setFromObject(objA);
box2 = new THREE.Box3().setFromObject(objB);
box3 = new THREE.Box3().setFromObject(objC);
box4 = new THREE.Box3().setFromObject(objD);

const boxes = [box1, box2, box3, box4];


// During each frame, use this code to check for collisions:
boxes.forEach(box => {
  // Exclude the current box from the list of boxes
  const otherBoxes = boxes.filter(other => other !== box)

  // Determine if any of the other boxes intersect with the current box
  otherBoxes.forEach(other => {
    if (box.intersectsBox(other)) {
      // Collision detected! Take action
    }
  })
})

Answer 2

To accomplish this task, follow these steps:

var objA = ...your initial object...
var objB = ...your second object...
var objC = ...your initial object...
var objD = ...your second object...

box1 = new THREE.Box3().setFromObject(objA);
box2 = new THREE.Box3().setFromObject(objB);
box3 = new THREE.Box3().setFromObject(objC);
box4 = new THREE.Box3().setFromObject(objD);

const boxes = [box1, box2, box3, box4];


// During each frame, use this code to check for collisions:
boxes.forEach(box => {
  // Exclude the current box from the list of boxes
  const otherBoxes = boxes.filter(other => other !== box)

  // Determine if any of the other boxes intersect with the current box
  otherBoxes.forEach(other => {
    if (box.intersectsBox(other)) {
      // Collision detected! Take action
    }
  })
})

Detecting collisions between multiple moving objects in Three.js

Answer №1

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