lerpgenerator.h

// © Copyright 2010 - 2016 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

    The Mezzanine Engine is free software: you can redistribute it and/or modify
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    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
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/*
 -----------------------------------------------------------------------------
 This source file is part of ogre-procedural

 For the latest info, see http://code.google.com/p/ogre-procedural/

 Copyright (c) 2010-2013 Michael Broutin

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 -----------------------------------------------------------------------------
 */
#ifndef _graphicsprocedurallerpgenerator_h
#define _graphicsprocedurallerpgenerator_h

#include "Graphics/Procedural/Texture/texturegenerator.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            ///////////////////////////////////////////////////////////////////////////////
            /// @brief Creates a texture that is the interpolated result between two other textures.
            /// @details
            ///////////////////////////////////////
            class MEZZ_LIB LerpGenerator : public TextureGenerator
            {
            protected:
                /// @internal
                /// @brief The first texture to interpolate.
                TextureBuffer* FirstTexture;
                /// @internal
                /// @brief The second texture to interpolate.
                TextureBuffer* SecondTexture;
                /// @internal
                /// @brief The amount to interpolate each colour channel of the provided textures.
                Real InterpolateAmount;
            public:
                /// @brief Class constructor.
                LerpGenerator();
                /// @brief Class destructor.
                virtual ~LerpGenerator();

                ///////////////////////////////////////////////////////////////////////////////
                // Utility

                /// @copydoc TextureGenerator::AddToTextureBuffer(TextureBuffer&) const
                virtual void AddToTextureBuffer(TextureBuffer& Buffer) const;
                /// @copydoc TextureGenerator::GetName() const
                virtual String GetName() const;

                ///////////////////////////////////////////////////////////////////////////////
                // Configuration

                /// @brief The first texture to interpolate.
                /// @exception If the texture provided here isn't at least the same size as the texture to be generated a PARAMETERS_EXCEPTION will be thrown.
                /// @param First A pointer to the first texture to interpolate between.  Initial Value: NULL.
                /// @return Returns a reference to this.
                LerpGenerator& SetFirstTexture(TextureBuffer* First);
                /// @brief The second texture to interpolate.
                /// @exception If the texture provided here isn't at least the same size as the texture to be generated a PARAMETERS_EXCEPTION will be thrown.
                /// @param Second A pointer to the second texture to interpolate between.  Initial Value: NULL.
                /// @return Returns a reference to this.
                LerpGenerator& SetSecondTexture(TextureBuffer* Second);
                /// @brief Sets how much interpolation between the two textures to do.
                /// @param Amount The amount of interpolation to perform on each colour channel of each pixel.  Must be in the range of 0-1.  Initial Value: 0.5.
                /// @return Returns a reference to this.
                LerpGenerator& SetInterpolateAmount(const Real Amount);
            };//LerpGenerator
        }//Procedural
    }//Graphics
}//Mezzanine

#endif