Discriminate over different types of DzNode

Comments

• Richard Haseltine Posts: 96,707

  October 2012 edited December 1969

  You should check the inheritance and className of the node - but I think you are asking about the C++ SDK, not scripting, in which case this needs to be moved.
• mattiascibien Posts: 140

  October 2012 edited December 1969

  Yes. I was asking about the C++ SDK. Sorry for the wrong post. So should I use the ->className() in qt? does it return DzSkeleton if i pass a DzNode to it?
• Richard Haseltine Posts: 96,707

  October 2012 edited December 1969

  Moved to the SDK forum.

  I know only scripting, but if the item is a DzSkeleton then classFactory().className() will return that - as long as it's supported (check it inherits DzBase) - if I understand the DS3 docs I just looked at. (In script classname is directly available in the base class).
• mattiascibien Posts: 140

  October 2012 edited December 1969

  I am going to try something... Thank for your help. I will post something when I discover it.
• samurle Posts: 94

  October 2012 edited December 1969

  If you want to know if a node inherits DzSkeleton, you can do this:

  
  if(node->inherits("DzSkeleton")) {
  }
  

  But, I wouldn't do this for the 4.5 SDK. I would instead check for DzFigure:

  
  if(node->inherits("DzFigure")) {
  }
  

  
  As the figure contains the skeleton, this is what you probably want to use.

  I don't think skeletons can exist without a figure in the 4.5 SDK.
  The SDK does it best to prevent you from allocating an instance of some classes.

  I was able to do it with the 3.x SDK, but not anymore.
• Richard Haseltine Posts: 96,707

  October 2012 edited December 1969

  There are now two types of figure and they are both sub-classes of DzSkeleton - DzFigure is a TriAx figure, DzLegacyFigure is what would have been a DzSkeleton in DS3.
• mattiascibien Posts: 140

  October 2012 edited December 1969

  But whi can't it work using DzSkeleton? Isn't it a class which is inherited by DzFigure and DzLegacyFigure?
• samurle Posts: 94

  October 2012 edited December 1969

  gravity0 said:

  But whi can't it work using DzSkeleton? Isn't it a class which is inherited by DzFigure and DzLegacyFigure?

  You can search for DzSkeleton in nodes if you want. What I'm saying is you can also search for DzFigure instead,
  and cast that to a skeleton. This is because skeletons don't seem to exist by themselves.
  DzFigure also contains access to other useful data, like the skin and bone binding, weights, etc...
• mattiascibien Posts: 140

  October 2012 edited December 1969

  For what I need right now (retrieving node's geometry) checking for !DzBone (to prevent from adding both skeleton geometry and bones geometry twice) seems to be my case. Testing ASAP. ;)
• Richard Haseltine Posts: 96,707

  October 2012 edited December 1969

  coredevel said:

  gravity0 said:

  But whi can't it work using DzSkeleton? Isn't it a class which is inherited by DzFigure and DzLegacyFigure?

  You can search for DzSkeleton in nodes if you want. What I'm saying is you can also search for DzFigure instead,
  and cast that to a skeleton. This is because skeletons don't seem to exist by themselves.
  DzFigure also contains access to other useful data, like the skin and bone binding, weights, etc...

  At the (considerable) risk of misusing terminology I thin DzSkeleton is a virtual class - you can't create members, but you can create members of it's derivatives (DzFigure and DzLegacyFigure). You should, however, use DzSkeleton as an inheritance check if you are in a situation where either derivative type would be relevant.
• rbtwhiz Posts: 2,178

  October 2012 edited December 1969

  I haven't compiled this... but if it doesn't, it should be pretty close...
  

  // Get the primary selection
  DzNode *node = dzScene->getPrimarySelection();
  // If we've got a node selected
  if( node )
  {
   // If the node can be cast to a DzBone
   if( qobject_cast(node) )
   {
    // We want the skeleton node
    node = node->getSkeleton();
   }
  
   // Get the object
   DzObject *object = node->getObject();
   // If we've got an object
   if( object )
   {
    // Get the current shape
    DzShape *shape = object->getCurrentShape();
    // If we've got a shape
    if( shape )
    {
     // Get the geometry
     DzGeometry *geometry = shape->getGeometry();
    }
   }
   // Else if we don't have an object
   else
   {
    // Provide feedback
    QMessageBox::warning(dzApp->getDialogParent(),
     tr("Resource Error"), tr("The selected item has no object."), QMessageBox::Ok );
   }
  }
  // Else if a node is not selected
  else
  {
   // Provide feedback
   QMessageBox::warning(dzApp->getDialogParent(),
     tr("Selection Error"), tr("You must have a node in the scene selected."), QMessageBox::Ok );
  }

  If you want to limit which DzNode subclasses you get the object from, you can use something like...

   // Declare and initialize a DzObject pointer that we'll check for later
   DzObject *object = NULL;
   
   // If the node can be cast to a [weight mapped] DzFigure
   if( DzFigure *figure = qobject_cast(node) )
   {
    // Get the object
    object = figure->getObject();
   }
   // Else if the node can be cast to a [parametric] DzLegacyFigure
   else if( DzLegacyFigure *legacyFigure = qobject_cast(node) )
   {
    // Get the object
    object = legacyFigure->getObject();
   }
   // Else if the node can be cast to a DzSkeleton
   else if( DzSkeleton *skeleton = qobject_cast(node) )
   {
    // Get the object
    object = skeleton->getObject();
   }

  ... in place of...

   // Get the object
   DzObject *object = node->getObject();

  -Rob