circlemodifier.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
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 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 -----------------------------------------------------------------------------
 */
#ifndef _graphicsproceduralcirclemodifier_h
#define _graphicsproceduralcirclemodifier_h

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

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            ///////////////////////////////////////////////////////////////////////////////
            /// @brief A modifier that draws a simple coloured circle onto the texture.
            /// @details
            ///////////////////////////////////////
            class MEZZ_LIB CircleModifier : public TextureModifier
            {
            protected:
                /// @internal
                /// @brief The colour of the circle to be drawn.
                ColourValue CircleColour;
                /// @internal
                /// @brief The radius of the circle.
                Whole CircleRadius;
                /// @internal
                /// @brief The position on the X axis of the circle.
                Real CircleXRel;
                /// @internal
                /// @brief The position on the Y axis of the circle.
                Real CircleYRel;
                /// @internal
                /// @brief The position on the X axis of the circle.
                Integer CircleXAdj;
                /// @internal
                /// @brief The position on the Y axis of the circle.
                Integer CircleYAdj;

                /// @internal
                /// @brief Convenience method for placing a pixel for the circle.
                /// @param XPos The position on the X axis to place the pixel.
                /// @param YPos The position on the Y axis to place the pixel.
                /// @param Buffer A reference to the buffer being worked on.
                void PutPixel(const Integer XPos, const Integer YPos, TextureBuffer& Buffer);
            public:
                /// @brief Blank constructor.
                CircleModifier();
                /// @brief Class destructor.
                virtual ~CircleModifier();

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

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

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

                /// @brief Sets the colour of the circle.
                /// @param Colour The colour of the circle to be drawn.  Initial Value: 1.0,1.0,1.0,1.0.
                /// @return Returns a reference to this.
                CircleModifier& SetColour(const ColourValue& Colour);
                /// @brief Sets the colour of the circle.
                /// @param Red The red colour component of the circle to be drawn.  Initial Value: 1.0.
                /// @param Green The red colour component of the circle to be drawn.  Initial Value: 1.0.
                /// @param Blue The red colour component of the circle to be drawn.  Initial Value: 1.0.
                /// @param Alpha The red colour component of the circle to be drawn.  Initial Value: 1.0.
                /// @return Returns a reference to this.
                CircleModifier& SetColour(const Real Red, const Real Green, const Real Blue, const Real Alpha = 1.0);

                /// @brief Sets the radius of the circle.
                /// @param Radius The radius of the circle to be drawn.  Initial Value: 0.
                /// @return Returns a reference to this.
                CircleModifier& SetRadius(const Whole Radius);

                /// @brief Sets the relative and offset values for the rectangle position.
                /// @param XRel The left edge of the rectangle in relative coordinates.  Initial Value: 0.5.
                /// @param YRel The top edge of the rectangle in relative coordinates.  Initial Value: 0.5.
                /// @param XAdj The left edge adjustment of the rectangle after relative coordinates are calculated.  Initial Value: 0.
                /// @param YAdj The top edge adjustment of the rectangle after relative coordinates are calculated.  Initial Value: 0.
                /// @return Returns a reference to this.
                CircleModifier& SetPosition(const Real XRel, const Real YRel, const Integer XAdj, const Integer YAdj);
                /// @brief Sets the relative component of the center position on the X axis.
                /// @param X The X axis center position of the circle in relative coordinates.  Initial Value: 0.5.
                /// @return Returns a reference to this.
                CircleModifier& SetXPositionRel(const Real X);
                /// @brief Sets the relative component of the center position on the Y axis.
                /// @param Y The Y axis center position of the circle in relative coordinates.  Initial Value: 0.5.
                /// @return Returns a reference to this.
                CircleModifier& SetYPositionRel(const Real Y);
                /// @brief Sets the absolute component of the center position on the X axis.
                /// @param X The X axis adjustment of the rectangle after relative coordinates are calculated.  Initial Value: 0.
                /// @return Returns a reference to this.
                CircleModifier& SetXPositionAdj(const Integer X);
                /// @brief Sets the absolute component of the center position on the Y axis.
                /// @param Y The Y axis adjustment of the rectangle after relative coordinates are calculated.  Initial Value: 0.
                /// @return Returns a reference to this.
                CircleModifier& SetYPositionAdj(const Integer Y);
            };//CircleModifier
        }//Procedural
    }//Graphics
}//Mezzanine

#endif