//##################################################################################################
//
//   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. 
//
//##################################################################################################

#include "cvfScalarMapperContinuousLinear.h"

#include "cvfMath.h"

namespace cvf {

//==================================================================================================
///
/// \class cvf::ScalarMapperContinuousLinear
/// \ingroup Render
///
/// Maps scalar values to texture coordinates/colors using continuous linear mapping
/// Configured by specifying a number of level colors and a min/max range. 
//==================================================================================================

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
double ScalarMapperContinuousLinear::normalizedValue(double domainValue) const
{
    double range = m_rangeMax - m_rangeMin;
    if (range != 0) return cvf::Math::clamp((domainValue - m_rangeMin)/range, 0.0, 1.0);
    else            return 0;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
double ScalarMapperContinuousLinear::domainValue(double normalizedPosition) const
{
    double range = m_rangeMax - m_rangeMin;

    return (normalizedPosition * range + m_rangeMin);
}

} // namespace cvf
