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#ifndef PixelLODEvaluator_INCLUDE_ONCE
#define PixelLODEvaluator_INCLUDE_ONCE

#include <vlGraphics/Actor.hpp>

namespace vl
{
  //-----------------------------------------------------------------------------
  // PixelLODEvaluator
  //-----------------------------------------------------------------------------
  /**
   * A LODEvaluator that computes the appropriate LOD based on the approximate
   * 2d area that an Actor covers on the screen.
   *
   * \sa
   * - LODEvaluator
   * - PixelLODEvaluator
  */
  class VLGRAPHICS_EXPORT PixelLODEvaluator: public LODEvaluator
  {
    VL_INSTRUMENT_CLASS(vl::PixelLODEvaluator, LODEvaluator)

  public:
    PixelLODEvaluator()
    {
      VL_DEBUG_SET_OBJECT_NAME()
    }

    virtual int evaluate(Actor* actor, Camera* camera);

    const std::vector<float>& pixelRangeSet() const { return mPixelRangeSet; }

    std::vector<float>& pixelRangeSet() { return mPixelRangeSet; }

  protected:
    std::vector<float> mPixelRangeSet;
  };
}

#endif