Wsrtjtyk

obj file has 2 objects - body and floor.

Floor is a simple clear transparent plane with just 4 vertices.
And I applied both PNG (with transparent area) and JPEG textures, but it all renders in black.
I also tried

transparent.contents = UIImage(named:"floor.png")

I don't know how I can render it properly.
I am using two approaches.

1. Load obj file via model io then add to scene node.


2. Load .scn file where the model'd been added beforehand.

But both didn't work out.
The following is the code that I am using now.

1. 
   

   With Model I/O

   
   
   

   let scatterFuncFloor = MDLScatteringFunction()
   
   let floorProperty = MDLMaterialProperty(name: floorTextureFile, semantic: MDLMaterialSemantic.baseColor, url: floorTextureURL)
   
   let floorMaterial = MDLMaterial(name: NOLOC("FLOOR"), scatteringFunction: scatterFuncFloor)  
   
   floorMaterial.setProperty(floorProperty)
   
   ............
   
           for submesh in modelObj.submeshes! {  
   
           if let submesh = submesh as? MDLSubmesh {  
   
               if (index == 0) { // Floor  
   
                   submesh.material = floorMaterial  
   
                   print(" submesh[0] name:", submesh.name)  
   
                   index += 1  
   
               }  
   
               else { // body   
   
                   submesh.material = material  
   
                   print(" submesh[1] name:", submesh.name)  
   
               }  
   
           }  
   
       }  
   
   

   
   


2. 
   

   With .scn file
   (In the preview of scn file, it was rendered properly, but not in the app)

   
   
   

   let url = URL(fileURLWithPath: dir+"/model.scn")
   
   do {
   
       let scene = try SCNScene(url: url, options: nil)
   
       scene.background.contents = UIColor.white
   
       modelNode = scene.rootNode.childNodes[1]
   
                   //modelNode.childNodes[0].geometry?.materials[0].transparencyMode = SCNTransparencyMode.rgbZero
   
       self.autoenablesDefaultLighting = true
   
       self.antialiasingMode = SCNAntialiasingMode.multisampling4X
   
       self.allowsCameraControl = true
   
       self.scene = scene
   
       self.backgroundColor = UIColor.white
   
   }
   
   catch {
   
       print("cannot find or open SCN file") 
   
   }
   
   

   
   
   

   Any idea?