How to add animation for changing background in SceneKit(ARSCNView)

Question

kyh951019 OP

Created Jun ’20

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I try to change background in ARSCNView. It works with below code.

Code Block let background = MDLTexture(named: "Background/photo_studio_01.jpg", bundle: nil) // or UIImage.
scene.background.contents =	background

I want to add animation such as fade in and fade out when changing the background.
I did with CAAnimation but it is not working. I read document of contents is animatable.
https://developer.apple.com/documentation/scenekit/scnmaterialproperty/1395372-contents

Give me some advice about animate contents.

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Answer 1

DTS Engineer OP

Apple

Jun ’20

Hello!

One approach that you could take is to set the background of your SCNScene to an SKScene.

In this SKScene, you would have two SKSpriteNodes, which each hold the SKTexture that corresponds to your two images. Then, to fade them in/out, you can use SKAction.fadeIn or fadeOut with a duration.

1