Having an Object3D with various levels of children (more Object3Ds or Meshes/Lines), I am trying to compute a bounding box of the object and all its descendants similar to the setFromObject() method in the Box3 class.
Unfortunately, I can't utilize the setFromObject() method of Box3 because the project I'm working on exclusively uses BufferGeometry instead of Geometry. Since BufferGeometry objects lack a .vertices property, the setFromObject() function is unable to compute the bounding box as intended.
var bbox = new THREE.Box3().setFromObject(object);
console.log(bbox.min); // x, y, and z are all Infinity.
console.log(bbox.max); // x, y, and z are all -Infinity.
While attempting to use the computeBoundingBox() method of BufferGeometry, I have found that the bounding box does not update when the geometry is manipulated. This issue may be linked to matrixAutoUpdate being set to false, despite trying to invoke updateMatrix() with no success.
Is there a method to calculate a bounding box for an Object3D and all its descendants using the BufferGeometry class? As a newcomer to Three.js, any guidance on this matter would be greatly appreciated!
My current Three.js version is r66.