Place object at a fixed 3D location

I am not good at models, just guess that the spaceship has a special node to set up the 3d world thus you can add it directly to the scene view. In other hand, normal models have not that special node, you should do more works to add it into sceneview.

Bellow is the code to load and add a model (obj, dae) - it is mainly based on the example ARKitExample:

guard let virtualObjectScene = SCNScene(named: "\(modelName).\(fileExtension)", inDirectory: "Models.scnassets/\(modelName)") else {

return

}

let wrapperNode = SCNNode()

for child in virtualObjectScene.rootNode.childNodes {

wrapperNode.addChildNode(child)

}

sceneView.scene.rootNode.addChildNode(wrapperNode)

Essentially you need to either create a node for your model and let it teleport to the location you tap or create a copy of the object at the location you tap. There is a great tutorial for beginners I used to learn this here http://jamesonquave.com/blog/arkit-tutorial-in-swift-4-for-xcode-9-using-scenekit/

Just do the whole thing as a new project, it takes literally 10 minutes.

Here is the answer!:

https://stackoverflow.com/a/73655218/17992581