SCNScene.write() doesn't call the delegate, how to fix it?
In SCNScene.write(), the signature allows to specify a delegate which is used to resolve how to save, principally, texture assets:
func write(to url: URL, options: [String : Any]? = nil, delegate: SCNSceneExportDelegate?, progressHandler: SCNSceneExportProgressHandler? = nil) -> Bool
Documentation here
However, when I try to use it, the delegate never gets called, even in situations in which, I think, it should:
...
guard let shipText = Bundle.main.url(forResource: "texture", withExtension: "png", subdirectory: "art.scnassets") else {
print("Couldn't retrieve texture")
return
}
do {
let scene = SCNScene()
let boxGeom = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0)
boxGeom.firstMaterial!.diffuse.contents = shipText.path
boxGeom.firstMaterial!.lightingModel = .constant
let boxNode = SCNNode(geometry: boxGeom)
scene.rootNode.addChildNode(boxNode)
let fileMan = FileManager.default
let docsDir = try fileMan.url(for: .documentDirectory,
in: .userDomainMask,
appropriateFor: nil, create: true)
let uuid = UUID.init().uuidString
let exportBaseName = docsDir.appendingPathComponent(uuid, isDirectory: false)
print("exportBaseName: (exportBaseName)")
let daeExport = exportBaseName.appendingPathExtension("dae")
let scnExport = exportBaseName.appendingPathExtension("scn")
// This prints true
print(scene.write(to: scnExport, options: nil, delegate: self, progressHandler: nil))
// This prints true
print(scene.write(to: daeExport, options: nil, delegate: self, progressHandler: nil))
}
catch {
print(error.localizedDescription)
}
...
...
// This never gets called
extension ViewController: SCNSceneExportDelegate {
func write(_ image: UIImage, withSceneDocumentURL documentURL: URL, originalImageURL: URL?) -> URL? {
print("Delegate being called: ", image, documentURL, originalImageURL)
return nil
}
}
This is an issue to me because I am trying to export the scenes correctly and being able to re-write the location of the textures which are used in the materials is a feature I need.
Could someone tell me if I'm doing something wrong, if anything?
ios swift scenekit arkit modelio
asked Nov 22 at 18:36
Flora
3718
add a comment |
In SCNScene.write(), the signature allows to specify a delegate which is used to resolve how to save, principally, texture assets:
func write(to url: URL, options: [String : Any]? = nil, delegate: SCNSceneExportDelegate?, progressHandler: SCNSceneExportProgressHandler? = nil) -> Bool
Documentation here
However, when I try to use it, the delegate never gets called, even in situations in which, I think, it should:
...
guard let shipText = Bundle.main.url(forResource: "texture", withExtension: "png", subdirectory: "art.scnassets") else {
print("Couldn't retrieve texture")
return
}
do {
let scene = SCNScene()
let boxGeom = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0)
boxGeom.firstMaterial!.diffuse.contents = shipText.path
boxGeom.firstMaterial!.lightingModel = .constant
let boxNode = SCNNode(geometry: boxGeom)
scene.rootNode.addChildNode(boxNode)
let fileMan = FileManager.default
let docsDir = try fileMan.url(for: .documentDirectory,
in: .userDomainMask,
appropriateFor: nil, create: true)
let uuid = UUID.init().uuidString
let exportBaseName = docsDir.appendingPathComponent(uuid, isDirectory: false)
print("exportBaseName: (exportBaseName)")
let daeExport = exportBaseName.appendingPathExtension("dae")
let scnExport = exportBaseName.appendingPathExtension("scn")
// This prints true
print(scene.write(to: scnExport, options: nil, delegate: self, progressHandler: nil))
// This prints true
print(scene.write(to: daeExport, options: nil, delegate: self, progressHandler: nil))
}
catch {
print(error.localizedDescription)
}
...
...
// This never gets called
extension ViewController: SCNSceneExportDelegate {
func write(_ image: UIImage, withSceneDocumentURL documentURL: URL, originalImageURL: URL?) -> URL? {
print("Delegate being called: ", image, documentURL, originalImageURL)
return nil
}
}
This is an issue to me because I am trying to export the scenes correctly and being able to re-write the location of the textures which are used in the materials is a feature I need.
Could someone tell me if I'm doing something wrong, if anything?
ios swift scenekit arkit modelio
asked Nov 22 at 18:36
Flora
3718
add a comment |
In SCNScene.write(), the signature allows to specify a delegate which is used to resolve how to save, principally, texture assets:
func write(to url: URL, options: [String : Any]? = nil, delegate: SCNSceneExportDelegate?, progressHandler: SCNSceneExportProgressHandler? = nil) -> Bool
Documentation here
However, when I try to use it, the delegate never gets called, even in situations in which, I think, it should:
...
guard let shipText = Bundle.main.url(forResource: "texture", withExtension: "png", subdirectory: "art.scnassets") else {
print("Couldn't retrieve texture")
return
}
do {
let scene = SCNScene()
let boxGeom = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0)
boxGeom.firstMaterial!.diffuse.contents = shipText.path
boxGeom.firstMaterial!.lightingModel = .constant
let boxNode = SCNNode(geometry: boxGeom)
scene.rootNode.addChildNode(boxNode)
let fileMan = FileManager.default
let docsDir = try fileMan.url(for: .documentDirectory,
in: .userDomainMask,
appropriateFor: nil, create: true)
let uuid = UUID.init().uuidString
let exportBaseName = docsDir.appendingPathComponent(uuid, isDirectory: false)
print("exportBaseName: (exportBaseName)")
let daeExport = exportBaseName.appendingPathExtension("dae")
let scnExport = exportBaseName.appendingPathExtension("scn")
// This prints true
print(scene.write(to: scnExport, options: nil, delegate: self, progressHandler: nil))
// This prints true
print(scene.write(to: daeExport, options: nil, delegate: self, progressHandler: nil))
}
catch {
print(error.localizedDescription)
}
...
...
// This never gets called
extension ViewController: SCNSceneExportDelegate {
func write(_ image: UIImage, withSceneDocumentURL documentURL: URL, originalImageURL: URL?) -> URL? {
print("Delegate being called: ", image, documentURL, originalImageURL)
return nil
}
}
This is an issue to me because I am trying to export the scenes correctly and being able to re-write the location of the textures which are used in the materials is a feature I need.
Could someone tell me if I'm doing something wrong, if anything?
ios swift scenekit arkit modelio
asked Nov 22 at 18:36
Flora
3718
In SCNScene.write(), the signature allows to specify a delegate which is used to resolve how to save, principally, texture assets:
func write(to url: URL, options: [String : Any]? = nil, delegate: SCNSceneExportDelegate?, progressHandler: SCNSceneExportProgressHandler? = nil) -> Bool
Documentation here
However, when I try to use it, the delegate never gets called, even in situations in which, I think, it should:
...
guard let shipText = Bundle.main.url(forResource: "texture", withExtension: "png", subdirectory: "art.scnassets") else {
print("Couldn't retrieve texture")
return
}
do {
let scene = SCNScene()
let boxGeom = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0)
boxGeom.firstMaterial!.diffuse.contents = shipText.path
boxGeom.firstMaterial!.lightingModel = .constant
let boxNode = SCNNode(geometry: boxGeom)
scene.rootNode.addChildNode(boxNode)
let fileMan = FileManager.default
let docsDir = try fileMan.url(for: .documentDirectory,
in: .userDomainMask,
appropriateFor: nil, create: true)
let uuid = UUID.init().uuidString
let exportBaseName = docsDir.appendingPathComponent(uuid, isDirectory: false)
print("exportBaseName: (exportBaseName)")
let daeExport = exportBaseName.appendingPathExtension("dae")
let scnExport = exportBaseName.appendingPathExtension("scn")
// This prints true
print(scene.write(to: scnExport, options: nil, delegate: self, progressHandler: nil))
// This prints true
print(scene.write(to: daeExport, options: nil, delegate: self, progressHandler: nil))
}
catch {
print(error.localizedDescription)
}
...
...
// This never gets called
extension ViewController: SCNSceneExportDelegate {
func write(_ image: UIImage, withSceneDocumentURL documentURL: URL, originalImageURL: URL?) -> URL? {
print("Delegate being called: ", image, documentURL, originalImageURL)
return nil
}
}
This is an issue to me because I am trying to export the scenes correctly and being able to re-write the location of the textures which are used in the materials is a feature I need.
Could someone tell me if I'm doing something wrong, if anything?
ios swift scenekit arkit modelio
ios swift scenekit arkit modelio
asked Nov 22 at 18:36
Flora
3718
asked Nov 22 at 18:36
Flora
3718
asked Nov 22 at 18:36
Flora
3718
asked Nov 22 at 18:36
Flora
3718
asked Nov 22 at 18:36
Flora
3718
3718
add a comment |
add a comment |
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