sphereuvmodifier.cpp

// © Copyright 2010 - 2016 BlackTopp Studios Inc.
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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
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 */
#ifndef _graphicsproceduralsphereuvmodifier_cpp
#define _graphicsproceduralsphereuvmodifier_cpp

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

#include "MathTools/mathtools.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            SphereUVModifier::SphereUVModifier()
                {  }

            SphereUVModifier::~SphereUVModifier()
                {  }

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

            void SphereUVModifier::Modify(TriangleBuffer& Buffer)
            {
                for( VertexIterator VertIt = Buffer.GetVertices().begin() ; VertIt != Buffer.GetVertices().end() ; ++VertIt )
                {
                    Vector3 NormalizedPos = VertIt->Position.GetNormal();
                    Vector2 VecXZ(NormalizedPos.X,NormalizedPos.Z);
                    VertIt->UV.X = Vector2::Unit_X().AngleTo(VecXZ) / MathTools::GetTwoPi();
                    VertIt->UV.Y = ( MathTools::ATan(NormalizedPos.Y / VecXZ.Length()) + MathTools::GetHalfPi() ) / MathTools::GetPi();
                }
            }

            String SphereUVModifier::GetName() const
                { return "SphereUVModifier"; }
        }//Procedural
    }//Graphics
}//Mezzanine

#endif