3D Asset nodes not showing positions

Art / Assets
1

I’m successfully displaying the 3d avatars in my iOS app.

But I want to get the position of the head of the 3d avatar, but I’m only getting 0,0 coordinates. The only coordinates I am given are that of the hips. Why is that? Is there a way to find where the head is located?

here is my Swift code:

let scene = SCNScene.init(gltfAsset: asset)
                print(scene.rootNode.childNodes.count)
                scene.rootNode.childNodes.first?.childNodes.forEach { $0.simdTransform = $0.simdTransform }

                if let children =  scene.rootNode.childNodes.first?.childNodes {
                    for node in children {
                        print(node)
                        print(node.position)
                        print(node.worldPosition)
                    }
                }

This prints the following:

<SCNNode: 0x106f3fc70 'Hips' pos(-0.000000 1.036964 0.040429) rot(-1.000013 -0.000872 0.000026 0.059964) | 3 children>
SCNVector3(x: -3.8782454e-14, y: 1.0369642, z: 0.04042893)
SCNVector3(x: -3.8782454e-14, y: 1.0369642, z: 0.04042893)
<SCNNode: 0x106f3feb0 'EyeLeft' | geometry=<SCNGeometry: 0x30257b440 'EyeLeft'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f400f0 'EyeRight' | geometry=<SCNGeometry: 0x30257b4f0 'EyeRight'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f40330 'Wolf3D_Head' | geometry=<SCNGeometry: 0x30257b5a0 'Wolf3D_Head'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f40570 'Wolf3D_Teeth' | geometry=<SCNGeometry: 0x30257b650 'Wolf3D_Teeth'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f409f0 'Wolf3D_Headwear' | geometry=<SCNGeometry: 0x30257b700 'Wolf3D_Headwear'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f40c30 'Wolf3D_Body' | geometry=<SCNGeometry: 0x30257b7b0 'Wolf3D_Body'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f40e70 'Wolf3D_Outfit_Bottom' | geometry=<SCNGeometry: 0x30257b860 'Wolf3D_Outfit_Bottom'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f410b0 'Wolf3D_Outfit_Footwear' | geometry=<SCNGeometry: 0x30257b910 'Wolf3D_Outfit_Footwear'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
<SCNNode: 0x106f412f0 'Wolf3D_Outfit_Top' | geometry=<SCNGeometry: 0x30257b9c0 'Wolf3D_Outfit_Top'> | no child>
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
SCNVector3(x: 0.0, y: 0.0, z: 0.0)
2

Hi there,

All the meshes have their origin at 0.0, that’s why you’re only getting zeros. If you dig into the hierarchy of the “Hips” object to get to the “Head” bone, you get an approximation of where the head is.