CODEWITHSUNDEEP
three.js
MMaker
MMaker

Reputation: 15

Set World Position of Child

I import an obj file with the OBJLoader. After then i want to change the position of a child from the imported model. I try to get the position of the child with the following code:

var vector = new THREE.Vector3();
vector.setFromMatrixPosition( child.matrixWorld );
console.log('vector', vector);

But it always return

THREE.Vector3 {x: 0, y: 0, z: 0}

How can i get the current world position of the child and then change it?

Upvotes: 1

Views: 1850

Answers (1)

Nabzi
Nabzi

Reputation: 2101

You can render the scene once before you get the position.

Use this line of code before you get the position :

renderer.render(scene,camera);

(here I assume the name of your scene and camera are scene and camera)

Here is an example of loading an object and getting the position : 

var objLoader = new THREE.OBJLoader();
objLoader.setMaterials( materials );
objLoader.setPath( 'models/' );
objLoader.load( objFile, function ( child ) {
    child.position.z = 20;
    scene.add( child );
    renderer.render(scene,camera);
    var vector = new THREE.Vector3();
    vector.setFromMatrixPosition( child.matrixWorld );
    console.log('vector', vector);
}, onProgress, onError );

Here if you comment "renderer.render(scene,camera);", you will get :

Vector3 {x: 0, y: 0, z: 0}

and if you uncomment it you will get :

Vector3 {x: 0, y: 0, z: 20}

Upvotes: 1

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