vortexmodifier.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
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 THE SOFTWARE.
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 */
#ifndef _graphicsproceduralvortexmodifier_h
#define _graphicsproceduralvortexmodifier_h

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

#include "vector2.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            ///////////////////////////////////////////////////////////////////////////////
            /// @brief Twists the pixel positions in a circle on the Texture.
            /// @details
            ///////////////////////////////////////
            class MEZZ_LIB VortexModifier : public TextureModifier
            {
            protected:
                /// @internal
                /// @brief The center of the twisting circle on the texture.
                Vector2 VortexCenter;
                /// @internal
                /// @brief The size of the twisting circle on the texture.
                Vector2 VortexRadius;
                /// @internal
                /// @brief The amount of twist to be applied in radians.
                Real TwistAngle;
            public:
                /// @brief Blank constructor.
                VortexModifier();
                /// @brief Class destructor.
                virtual ~VortexModifier();

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

                /// @copydoc TextureModifier::Modify(TextureBuffer&)
                virtual void Modify(TextureBuffer& Buffer);
                /// @copydoc TextureModifier::GetName() const
                virtual String GetName() const;

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

                /// @brief Sets the center point where the texture will be twisted.
                /// @param Center The center of the twisting circle on the texture.  Initial Value: (0.0,0.0).
                /// @return Returns a reference to this.
                VortexModifier& SetVortexCenter(const Vector2& Center);
                /// @brief Sets the center point where the texture will be twisted.
                /// @param X The center of the twisting circle on the X axis.  Initial Value: 0.0.
                /// @param Y The center of the twisting circle on the Y axis.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexCenter(const Real X, const Real Y);
                /// @brief Sets the center point on the X axis where the texture will be twisted.
                /// @param X The center of the twisting circle on the X axis.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexCenterX(const Real X);
                /// @brief Sets the center point on the Y axis where the texture will be twisted.
                /// @param Y The center of the twisting circle on the Y axis.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexCenterY(const Real Y);

                /// @brief Sets the radius of the twisting circle.
                /// @param Radius The size of the twisting circle on the texture.  Initial Value: (0.0,0.0).
                /// @return Returns a reference to this.
                VortexModifier& SetVortexRadius(const Vector2& Radius);
                /// @brief Sets the radius of the twisting circle.
                /// @param X The radius of the twisting circle on the X axis.  Initial Value: 0.0.
                /// @param Y The radius of the twisting circle on the Y axis.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexRadius(const Real X, const Real Y);
                /// @brief Sets the radius on the X axis of the twisting circle.
                /// @param X The radius of the twisting circle on the X axis.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexRadiusX(const Real X);
                /// @brief Sets the radius on the Y axis of the twisting circle.
                /// @param Y The radius of the twisting circle on the Y axis.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexRadiusY(const Real Y);

                /// @brief Sets the angle by which to rotate pixels within the vortex.
                /// @param Twist The amount of rotation in radians to be applied to pixels within the vortex.  Initial Value: 0.0.
                /// @return Returns a reference to this.
                VortexModifier& SetVortexTwist(const Real Twist);
            };//VortexModifier
        }//Procedural
    }//Graphics
}//Mezzanine

#endif