Getting extra data from blender to jmonkeyengine (through gltf)

tlf30 · June 2, 2021, 6:22am

In the code I provided, the mesh name would end up being the name of the geometry. Jme has no concept of a mesh name.

Jorrit_Tyberghein · June 2, 2021, 6:43am

Yes I know. And that’s a bit of a problem in my case. I’m using the mesh name to find a mesh from another library (my own concept) so that my different game levels can reuse the same mesh. In Blender I name my mesh ‘link_Whatever’ and that gets translated to ‘Whatever’ which is a mesh in another library. So in a way I’m abusing the current gltf loader ‘bug/feature’ for this. I hope I can read the custom properties from the mesh through an extension. If so I can probably solve this using that feature

Ali_RS · June 2, 2021, 6:54am

You can use a Gltf ExtrasLoader for such properties which will be loaded as UserData in JME.

github.com

Simsilica/JmeConvert/blob/ce5f28844da9443e2d3884fd33377b2c18e74db3/src/main/java/com/simsilica/jmec/gltf/GltfExtrasLoader.java#L54

    
      
          import com.google.gson.*;
          
          
import com.jme3.scene.Spatial;
          import com.jme3.scene.plugins.gltf.*;
          
          
/**
           *  Attaches GLTF "extras" data to objects as appropriate.
           *
           *  @author    Paul Speed
           */
          public class GltfExtrasLoader implements ExtrasLoader {
              static Logger log = LoggerFactory.getLogger(GltfExtrasLoader.class);
              
              public static final GltfExtrasLoader INSTANCE = new GltfExtrasLoader();
              
              public GltfExtrasLoader() {
              }
              
              /**
               *  Utility method to create a ModelKey that is configured to use this
               *  ExtrasLoader.

Jorrit_Tyberghein · June 2, 2021, 6:56am

Yes I’m already using that system for reading object properties. Just hope it also works for meshes

tlf30 · June 2, 2021, 3:22pm

As far as I know, I don’t think there is anything for user data implemented for meshes. It would have to be stored in the geometry spatial if it was. But I can check and see if it is.