How to find a bone?

Fedor_van_Eldijk · September 27, 2022, 6:20am

I have a mesh with a armature. I need to find a specific bone in it to attach another item to it.

I only found some older form posts that suggest using deprecated stuff. Even the manual talks about bones, while the newer system seems to talk about joints.

So what is the current way to find a names bone in my model?

Ali_RS · September 27, 2022, 6:42am

Use getAttachmentsNode for that purpose.

github.com

jMonkeyEngine/jmonkeyengine/blob/63a1d07535693cf124b4578524850b7ba06ca9ea/jme3-core/src/main/java/com/jme3/anim/SkinningControl.java#L386


      
          
          /**
           * Access the attachments node of the named bone. If the bone doesn't
           * already have an attachments node, create one and attach it to the scene
           * graph. Models and effects attached to the attachments node will follow
           * the bone's motions.
           *
           * @param jointName the name of the joint
           * @return the attachments node of the joint
           */
          public Node getAttachmentsNode(String jointName) {
              Joint b = armature.getJoint(jointName);
              if (b == null) {
                  throw new IllegalArgumentException("Given bone name does not exist "
                          + "in the armature.");
              }
          
              updateTargetsAndMaterials(spatial);
              int boneIndex = armature.getJointIndex(b);
              Node n = b.getAttachmentsNode(boneIndex, targets);
              /*

You can ask for a joint from the Armature class.

github.com

jMonkeyEngine/jmonkeyengine/blob/63a1d07535693cf124b4578524850b7ba06ca9ea/jme3-core/src/main/java/com/jme3/anim/SkinningControl.java#L415


      
              parent.attachChild(n);
          
              return n;
          }
          
          /**
           * returns the armature of this control
           *
           * @return the pre-existing instance
           */
          public Armature getArmature() {
              return armature;
          }
          
          /**
           * Enumerate the target meshes of this control.
           *
           * @return a new array
           */
          public Mesh[] getTargets() {
              Mesh[] result = new Mesh[targets.size()];

Fedor_van_Eldijk · September 27, 2022, 8:52am

That worked like a charm… Thanks again for your great help!

Ali_RS · September 27, 2022, 9:27am

You’re welcome!