batch_renderable.h

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/*
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#ifndef RVE_RENDER_SERVER_BATCH_RENDERABLE_H
#define RVE_RENDER_SERVER_BATCH_RENDERABLE_H

#include <OGRE/OgreSimpleRenderable.h>
#include <OGRE/OgreMaterial.h>

#include "../pickable.h"
#include "../renderer.h"

namespace rve_render_server
{

template<typename Child, typename Description>
class BatchRenderable : public Ogre::SimpleRenderable, public Pickable
{
public:
  BatchRenderable(const Description& desc, bool alpha)
  : desc_(desc)
  , alpha_(alpha)
  , count_(0)
  {
    pick_id_ = getRenderer()->allocatePickID(this);
  }

  ~BatchRenderable()
  {
    getRenderer()->deallocatePickID(pick_id_);
  }

  bool isEmpty()
  {
    return count_ == 0;
  }

  bool isFull()
  {
    return count_ == static_cast<Child*>(this)->getElementsPerVBO();
  }

  bool isAlpha()
  {
    return alpha_;
  }

  // Ogre Renderable Overrides
  virtual void _notifyCurrentCamera(Ogre::Camera* camera)
  {
    SimpleRenderable::_notifyCurrentCamera( camera );
  }

  virtual Ogre::Real getBoundingRadius(void) const
  {
    return Ogre::Math::Sqrt(std::max(mBox.getMaximum().squaredLength(), mBox.getMinimum().squaredLength()));
  }

  virtual Ogre::Real getSquaredViewDepth(const Ogre::Camera* cam) const
  {
    Ogre::Vector3 vMin, vMax, vMid, vDist;
    vMin = mBox.getMinimum();
    vMax = mBox.getMaximum();
    vMid = ((vMax - vMin) * 0.5) + vMin;
    vDist = cam->getDerivedPosition() - vMid;

    return vDist.squaredLength();
  }

  virtual void getWorldTransforms(Ogre::Matrix4* xform) const
  {
     *xform = m_matWorldTransform * getParentNode()->_getFullTransform();
  }

  virtual const Ogre::LightList& getLights() const
  {
    return queryLights();
  }

protected:
  Description desc_;
  bool alpha_;
  uint32_t count_;
  uint32_t pick_id_;
};

} // namespace rve_render_server

#endif // RVE_RENDER_SERVER_BATCH_RENDERABLE_H