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  /*!
    \class SoVertexAttributeBundle include/Inventor/bundles/SoVertexAttributeBundle.h
    \brief The SoVertexAttributeBundle class simplifies vertex attribute handling.
  
    \ingroup bundles
  
  */
  
  #include <Inventor/bundles/SoVertexAttributeBundle.h>
  #include <Inventor/actions/SoAction.h>
  #include <cassert>
  #include "SbBasicP.h"
  
  /*!
    Constructor.
  */
  SoVertexAttributeBundle::SoVertexAttributeBundle(SoAction * action, SbBool forrendering)
    : SoBundle(action)
  {
    this->elem = SoVertexAttributeElement::getInstance(this->state);
    this->glelem = NULL;
    if (forrendering) {
      this->glelem = static_cast<const SoGLVertexAttributeElement *> (this->elem);
    }
  }
  
  /*!
    Destructor.
  */
  SoVertexAttributeBundle::~SoVertexAttributeBundle()
  {
  }
  
  SbBool 
  SoVertexAttributeBundle::doAttributes(void) const
  {
    return (this->elem->getNumAttributes() > 0);
  }
  
  /*!
    Send the index'th attribute to OpenGL.
  */
  void 
  SoVertexAttributeBundle::send(int index) const
  {
    assert(this->glelem);
    this->glelem->send(index);
  }
  