CODEWITHSUNDEEP
iosscenekitscnnodescnmaterial
NSPratik
NSPratik

Reputation: 4858

How can I wrap image around SCNTube in circular manner?

I want to make a Saturn ring wrapped by an image in circular manner, so it looks real. The Sphere is completely fine, the only issue is with ring node.

What I want:

enter image description here

What I have tried:

let saturnRingNode = scene?.rootNode.childNode(withName: "saturn_ring", recursively: true)
let ring = UIImage(named: "saturn_ring")
saturnRingNode?.geometry?.firstMaterial?.diffuse.contents = ring

Here is my saturn_ring image:

enter image description here

How does it look:

enter image description here

I also tried to rotate materials as following code. But I thing it is not rendering in circular manner. It is just changing the direction of the lines.

if let material = saturnRingNode?.geometry?.firstMaterial {
    material.diffuse.contentsTransform = SCNMatrix4MakeRotation(Float.pi / 2, 0, 0, 1) 
}

I have tried AI tools, Apple developer community but couldn't find anything.

Upvotes: 0

Views: 40

Answers (1)

NSPratik
NSPratik

Reputation: 4858

I replaced a tube with a torus and rotated the texture image 90 degrees. XCode did the mapping itself.

let saturnRingNode = scene?.rootNode.childNode(withName: "saturn_ring", recursively: true)
let ring = UIImage(named: "saturn_ring")
saturnRingNode?.geometry?.firstMaterial?.diffuse.contents = ring

How to control the height of this torus?

  1. Select the ring node
  2. Node inspector → Transforms → Set the Y scale to 0

How does it look?

enter image description here

Upvotes: 1

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