DzBone and weight maps handling in the SDK

Alessandro Mastronardi

I wanted to ask if there is any any bit of code or sample in your SDK archives showing the process of creating a DzBone, assign a DzFaceGroup to it, and set the bone properties such as the origin/end/orientation values, rotation order, thus replicating what you usually do manually using the joint tool in Studio.
Also, once the bone is in place, which classes can I use to add a weight map and fill it with a polygon selection group?

dtamm

The following is untested and won't currently compilte, but should show the basic steps.

 // create a DzGraftingFigureShape
 DzGraftingFigureShape* tgtShape = new DzGraftingFigureShape;
 tgtShape->setName( "Your Name" );
 tgtShape->setFacetMesh( yourFacetMesh );

 // add material(s) to your shape using something like
 DzMaterial* material = new DzDefaultMaterial;
 material ->setName("material name")
 tgtShape->addMaterial( cur );

 // make a figure
 DzFigure* tgtFigure = new DzFigure();
 tgtFigure->setLabel( "Your Figure Label" );
 tgtFigure->setName( "Your Figure Name");
 tgtFigure->setOrigin( DzVec3(0, 0, 0), true );  // probably not the best origin


 // make an object
 DzObject* tgtObj = new DzObject();
 tgtFigure->setObject( tgtObj );
 tgtObj->addShape( tgtShape );

 // set the end point to center of bounding box.
 DzBox3 box = tgtShape->getFacetMesh()->getBoundingBox();
 tgtFigure->setEndPoint( box.getCenter(), true );

 // make a selection map
 DzSelectionMap* selMap = new DzSelectionMap();
 tgtFigure->setSelectionMap( selMap );

 // skinBining
 DzSkinBinding* skinBinding = tgtFigure->getSkinBinding();
 DzBoneBinding* boneBinding = NULL;

 // make a bone
 DzBone* tgtBone = new DzBone();
 tgtBone->setRotationOrder( srcNode->getRotationOrder() );
 tgtBone->setOrigin( DzVec3(0, 0, 0), true );
 tgtBone->setEndPoint( DzVec3(0, 0, 1), true );
 tgtBone->setOrientation( DzQuat(), true );
 tgtBone->setName( "Your Bone Name");
 tgtBone->setLabel( "Your Bone Label");
 tgtBone->setInheritScale( true );

 // add the bone
 dzScene->addNode( tgtBone );
 tgtFigure->addNodeChild( tgtBone );

 // make a bone binding
 boneBinding = new DzBoneBinding();
 boneBinding->setBone( tgtBone );

 // map to face group name to bone
 selMap->addPair( "your face group name", tgtBone );

 if(doTriaAxis)
 {
  for( int i = 0; i < 3; i++ )
  {
   DzWeightMapPtr map = new DzWeightMap();
   map->setNumWeights( numVerts );
   initWeightMap( map, numVerts );
   boneBinding->setLocalWeights( map, i );
  }

  DzWeightMapPtr map = new DzWeightMap();
  map->setNumWeights( numVerts );
  initWeightMap( map, numVerts );
  boneBinding->setScaleWeights( map );
 }
 else
 {
  DzWeightMapPtr map = new DzWeightMap();
  map->setNumWeights( numVerts );
  initWeightMap( map, numVerts );
  boneBinding->setWeights( map );

  skinBinding->setBindingMode( DzSkinBinding::General );
  skinBinding->setScaleMode( DzSkinBinding::BindingMaps );
 }

 skinBinding->addBoneBinding( boneBinding );

 // setup a presentation
 DzPresentation* pres = new DzPresentation();
 pres->setType( isClothing ? "Follower" : "Actor" );
 pres->setLabel( tgtFigure->getLabel() );
 tgtFigure->setPresentation( pres );

 dzScene->addNode( tgtFigure );

Alessandro Mastronardi

Thanks a lot for the information, I'm going to do some testing.

Alessandro Mastronardi

Hello dtamm, if possible I'd like some explanation about the initWeightMap function, which doesn't exist in the SDK. If you could tell me what it's supposed to do I'd really appreciate it. (never mind, understood what this function needs to do)...

Also, I'd like to know how to gather getNumVerts() from the a DzFaceGroup; in dzfacegroup.h there are several commented functions (one of those is indeed getNumVerts()), and so I'm out of options about getting that value. Or, better, how to get the vertex collection out out of a facegroup.

I think I got to work what I needed.
Thanks