How can I determine the rotation of an object in relation to another using Three.js?

I am trying to figure out how to calculate the rotation of a camera as if it were attached to a box, without actually parenting the two together.

In THREE.js, there is object.worldToLocal(position) which helps determine the camera's position relative to the box. However, I am now seeking a similar function for euler or quaternion rotations.

In Unity, they provide transform.InverseTransformDirection(vector), and I am in search of a comparable solution for my current project.

Any suggestions would be greatly appreciated!

javascriptthree.js

Answer №1

Got it, I believe I understand!

  var rotation = camera.getWorldQuaternion();
  rotation.multiply(box.getWorldQuaternion().inverse());
  var euler = new THREE.Euler().setFromQuaternion(rotation);

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