I need to save solely face mesh picture from ARSCNView for every body. Under is the code I a utilizing.
override func viewDidAppear(_ animated: Bool) {
let configuration = ARFaceTrackingConfiguration()
sceneView.session.run(configuration)
}
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
let faceMesh = ARSCNFaceGeometry(machine: sceneView.machine!)
let node = SCNNode(geometry: faceMesh)
node.identify = "Take a look at Node"
node.geometry?.identify = "Take a look at geometry"
node.geometry?.supplies.first?.identify = "Take a look at materials"
node.geometry?.firstMaterial?.fillMode = .traces
return node
}
func renderer(_ renderer: SCNSceneRenderer, didUpdate node: SCNNode, for anchor: ARAnchor) {
if let faceAnchor = anchor as? ARFaceAnchor, let faceGeometry = node.geometry as? ARSCNFaceGeometry {
faceGeometry.replace(from: faceAnchor.geometry)
// let vertices = faceAnchor.geometry.vertices
let textureCoordinates = faceAnchor.geometry.textureCoordinates
exportMesh(node: node)
self.index = self.index + 1
}
}
func exportMesh(_ node: SCNNode, to url: URL, completion: (() -> ())?) {
DispatchQueue.international().async {
let mesh = MDLMesh(scnGeometry: node.geometry!)
let asset = MDLAsset()
asset.add(mesh)
do {
attempt asset.export(to: url)
} catch {
print("Cannot write mesh to url")
}
DispatchQueue.fundamental.async {
completion?()
}
}
}
Above code is to export the node geometry to information app.
Subsequent I’m fetching identical file from doc listing.
func loadMeshes() {
let asset = MDLAsset(url: path)
let scene = SCNScene(mdlAsset: asset)
let renderer = SCNRenderer(machine: MTLCreateSystemDefaultDevice(), choices: nil)
scene.rootNode.childNodes.first?.geometry?.firstMaterial?.fillMode = .traces
scene.rootNode.childNodes.first?.geometry = geometry
let renderTime = TimeInterval(0)
// Output dimension
let dimension = CGSize(width:1080, top: 1920)
// Render the picture
let picture = renderer.snapshot(atTime: renderTime, with: dimension,
antialiasingMode: SCNAntialiasingMode.multisampling4X)
}
Above code will retrieve mesh object, then convert it to scene. Replace scene geometry with traces. Then take snapshot of the scene.
This snapshot is simply the geometry of the face. I need the snapshot or picture of the face mesh with respect to the unique place and angle the place it was positioned within the dwell view.
If I look on the aspect or up down, then mesh picture generated from the scene also needs to replicate identical.
