Question

I loaded some objects via OBJLoader , loaded object contain one parent and multiple childs; then I apply Raycaster and find clicked child.

Then I want to update position of child object, but initial position comes zero for all childs.

var intersect = intersects[0].object;
intersect.position.y = intersect.position.y + 5; // 0 + 5 

But in my scene all looks fine. Also, If i remove clicked object, actually it is removed from scene. I think I missed some point their positions cant be (0,0,0). How can I reach their relative position ?

Answer 1

Try this, then read position(). I had the same issue, got an answer here. (geom is your Meshes geometry.)

objMesh.centroid = new THREE.Vector3();
for (var i = 0, l = geom.vertices.length; i < l; i++) {
  objMesh.centroid.add(geom.vertices[i].clone());
}
objMesh.centroid.divideScalar(geom.vertices.length);
var offset = objMesh.centroid.clone();

objMesh.geometry.applyMatrix(new THREE.Matrix4().makeTranslation(-offset.x, -offset.y, -offset.z));

objMesh.position.copy(objMesh.centroid);