icospheregenerator.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.
 -----------------------------------------------------------------------------
 */
#ifndef _graphicsproceduralicospheregenerator_h
#define _graphicsproceduralicospheregenerator_h

#include "Graphics/Procedural/Mesh/meshgenerator.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            ///////////////////////////////////////////////////////////////////////////////
            /// @brief A generator class for a sphere mesh where all triangles are the same size.
            /// @details
            ///////////////////////////////////////
            class MEZZ_LIB IcoSphereGenerator : public MeshGenerator<IcoSphereGenerator>
            {
            protected:
                /// @internal
                /// @brief The radius of the sphere.
                Real SphereRadius;
                /// @internal
                /// @brief The number of iterations needed to build the sphere mesh.
                Whole NumIterations;
            public:
                /// @brief Class constructor.
                /// @param Radius The radius of the sphere.
                /// @param Iterations The number of iterations needed to build the sphere mesh.
                IcoSphereGenerator(const Real Radius, const Whole Iterations = 2);
                /// @brief Class destructor.
                virtual ~IcoSphereGenerator();

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

                /// @copydoc MeshGenerator::AddToTriangleBuffer(TriangleBuffer&) const
                virtual void AddToTriangleBuffer(TriangleBuffer& Buffer) const;

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

                /// @brief Sets the radius of the sphere.
                /// @exception If the radius is set to 0 or less, a PARAMETERS_EXCEPTION will be thrown.
                /// @param Radius The radius of the sphere.
                /// @return Returns a reference to this.
                IcoSphereGenerator& SetRadius(const Real Radius);
                /// @brief Sets the number of iterations needed to build the sphere mesh.
                /// @remarks At only a single iteration, this generator will create an icosahedron.  Each iteration quadrupels the number of faces than the previous.
                /// This controls the resolution of the sphere, and ramps up quickly.
                /// @exception If the number of iterations is set to 0, a PARAMETERS_EXCEPTION will be thrown.
                /// @param Iterations The number of iterations needed to build the sphere mesh.
                /// @return Returns a reference to this.
                IcoSphereGenerator& SetNumIterations(const Whole Iterations);
            };//IcoSphereGenerator
        }//Procedural
    }//Graphics
}//Mezzanine

#endif