iOS ARKit setWorldOrigin has no effect

Question

I want to set my world origin to a reference point ARNode, this should be easy but has no effect.

// translate node
myNode.position = position;
// reset world origin to new node
[self.sceneView.session setWorldOrigin:(myNode.simdPivot)];

// Add the model to the scene
[self.sceneView.scene.rootNode addChildNode:myNode];

I switched on the debug functions but the world origin is not moving... but also no crash or warning??

self.sceneView.debugOptions = ARSCNDebugOptionShowWorldOrigin;

Can someone point me to the right direction!

Answer 1

I found that a matrix conversion is necessary to make it moving:

[self.sceneView.session setWorldOrigin:SCNMatrix4ToMat4(myNode.pivot)];

But still not exactly to the node point origin... anyone who has an idea?