//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2012 Ceetron AS
//    
//   This library is free software: you can redistribute it and/or modify 
//   it under the terms of the GNU General Public License as published by 
//   the Free Software Foundation, either version 3 of the License, or 
//   (at your option) any later version. 
//    
//   This library is distributed in the hope that it will be useful, but WITHOUT ANY 
//   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
//   FITNESS FOR A PARTICULAR PURPOSE.   
//    
//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>> 
//   for more details. 
//
//##################################################################################################

#pragma once

#include "cvfRendering.h"
#include "cvfRenderQueueSorter.h"

namespace cvf {


//==================================================================================================
//
// 
//
//==================================================================================================
class ConstantFrameRate : public Object
{
public:
    ConstantFrameRate();

    void        setTargetFrameRate(double targetFrameRate);
    void        setMinNumPartsToDraw(int minNumParts);
    void        enableDistanceSorting(bool enableDistanceSorting);

    double      targetFrameRate() const;
    int         minNumPartsToDraw() const;
    bool        isDistanceSortingEnabled() const;

    void        attachRendering(Rendering* rendering);
    Rendering*  attachedRendering();

    void        adjust(double currentFrameRate);

private:
    double                  m_targetFrameRate;          // Target frame rate in frames per second
    int                     m_minNumPartsToDraw;        // The lower bound on the number of parts we're allowed to draw
    bool                    m_enableDistanceSorting;    // If true, we'll try and do distance sorting for the colest 10% of the parts

    double                  m_numPartsToDraw;           // Calculated number of parts to draw. This is the value we'll adjust
    ref<Rendering>          m_rendering;                // The attached rendering

    bool                    m_pixelSizeCullingWasOn;    
    ref<RenderQueueSorter>  m_previousSorter;           // The sorter that was current in the rendering when it was attached
};

}