Can I remove an object from my scene? - ios

Question

Relatively new to ARKit, I was wondering if there's a way to remove a 3D object after it has been placed in a scene.

Answer 1

Just use this function:
Swift:
node.removeFromParentNode()
Objective-C
[node removeFromParentNode];

Answer 2

I suggest reading the documentation of ARKit, SceneKit and their basic classes.
You need to remove a node from the scene graph if you don't want it to appear on screen. You need to remove it from its parent node. Read more about it in SCNNode - Managing the Node Hierachy in Apples documentation.

Answer 3

To remove an object(SCNNode) from your Scene view, you can use Long Press Gesture. Just add the below code in your viewDidLoad.
UILongPressGestureRecognizer *longPressGestureRecognizer =
[[UILongPressGestureRecognizer alloc] initWithTarget:self
action:#selector(handleRemoveObjectFrom:)];
longPressGestureRecognizer.minimumPressDuration = 0.5;
[self.sceneView addGestureRecognizer:longPressGestureRecognizer];
Then handle your gesture recognizer method like below,
- (void)handleRemoveObjectFrom: (UILongPressGestureRecognizer *)recognizer {
if (recognizer.state != UIGestureRecognizerStateBegan) {
return;
}
CGPoint holdPoint = [recognizer locationInView:self.sceneView];
NSArray<SCNHitTestResult *> *result = [self.sceneView hitTest:holdPoint
options:#{SCNHitTestBoundingBoxOnlyKey: #YES, SCNHitTestFirstFoundOnlyKey: #YES}];
if (result.count == 0) {
return;
}
SCNHitTestResult * hitResult = [result firstObject];
[[hitResult.node parentNode] removeFromParentNode];
}
Hope this will help you to solve your problem.
Thanks