spherifymodifier.cpp

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

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*/
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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
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 -----------------------------------------------------------------------------
 */
#ifndef _graphicsproceduralspherifymodifier_cpp
#define _graphicsproceduralspherifymodifier_cpp

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

#include "exception.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            SpherifyModifier::SpherifyModifier() :
                SphereRadius(0)
                {  }

            SpherifyModifier::~SpherifyModifier()
                {  }

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

            void SpherifyModifier::Modify(TriangleBuffer& Buffer)
            {
                if( this->SphereRadius <= 0 ) {
                    MEZZ_EXCEPTION(ExceptionBase::INVALID_STATE_EXCEPTION,"The sphere radius must be larger than zero.");
                }

                for( VertexIterator VertIt = Buffer.GetVertices().begin() ; VertIt != Buffer.GetVertices().end() ; ++VertIt )
                {
                    Real Length = ( VertIt->Position - this->SphereCenter ).Length();
                    if( Length > 1e-6 ) {
                        VertIt->Normal = ( VertIt->Position - this->SphereCenter ) / Length;
                        VertIt->Position = this->SphereCenter + ( VertIt->Normal * this->SphereRadius );
                    }
                }
            }

            String SpherifyModifier::GetName() const
                { return "SpherifyModifier"; }

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

            SpherifyModifier& SpherifyModifier::SetSphereCenter(const Vector3& Center)
            {
                this->SphereCenter = Center;
                return *this;
            }

            SpherifyModifier& SpherifyModifier::SetSphereCenter(const Real X, const Real Y, const Real Z)
            {
                this->SphereCenter.SetValues(X,Y,Z);
                return *this;
            }

            SpherifyModifier& SpherifyModifier::SetSphereRadius(const Real Radius)
            {
                this->SphereRadius = Radius;
                return *this;
            }
        }//Procedural
    }//Graphics
}//Mezzanine

#endif