multitextured OBJ seems to shine strongly

Support
1

Hello everyone,

I use vtkOBJImporter for multitextured OBJ files.

vtkOBJImporter importer = new vtkOBJImporter();
importer.SetFileName(file);
importer.SetFileNameMTL(fileMTL);
importer.SetTexturePath(texPath);
importer.Update();
		
vtkActorCollection actors = new vtkActorCollection();
actors = importer.GetRenderer().GetActors(); 
actors.InitTraversal();

for (int a = 0; a < actors.GetNumberOfItems(); ++a) {
	vtkActor  actor = actors.GetNextActor();
	actor.GetProperty().LightingOn();
	    
	 if (actor.GetTexture()!=null) {
	     actor.GetTexture().InterpolateOff();
     }
	...
 // add actor to view
}

In the visualization, these are provided with a strong “shadow”, at least at first glance it looks like this. However, when it is rotated, it seems to be more of an extreme shine.

texture_001
texture_001473×581 27 KB

texture_002
texture_002494×568 27.7 KB

texture_003
texture_003522×574 25.2 KB

What went wrong here or what do I have to change so that I can display the data in the usual representation, i.e. completely textured and without shadows?

Best regards

2

The problem described above mainly occurs with the 3D scanner ‘Vectra’ from ‘Canfield’.
Multitextured objects are a problem. Single textured objects are displayed correctly and get an all-encompassing / complete illumination.

It would be quite helpful if someone could try this out with the attached test data set.
Many thanks in advance.

3

Hi there,
I had only now found time to deal with the problem again, unfortunately it is still present. The texture when importing OBJ files gets a strong shadow (or the object is extremely shiny).
Does anyone have an idea what this can be?
Possibly some light settings or something similar?

Any hint is welcome!

Many greetings

4

Meanwhile my problem is solved and it was so trivial.
Only actor.GetProperty().LightingOff() had to be set (in my case).

Greetings to all