jittermodifier.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
 in the Software without restriction, including without limitation the rights
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 */
#ifndef _graphicsproceduraljittermodifier_cpp
#define _graphicsproceduraljittermodifier_cpp

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

#include "MathTools/randomnumber.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            JitterModifier::JitterModifier() :
                GeneratorSeed(5120),
                JitterRadius(32)
                {  }

            JitterModifier::~JitterModifier()
                {  }

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

            void JitterModifier::Modify(TextureBuffer& Buffer)
            {
                TextureBuffer TempBuffer(Buffer);
                MathTools::MersenneTwisterGenerator32 NumGen(this->GeneratorSeed);
                Integer TargetWidth = static_cast<Integer>( Buffer.GetWidth() );
                Integer TargetHeight = static_cast<Integer>( Buffer.GetHeight() );
                Integer Radius = static_cast<Integer>( 1.0 + ( 9.0 / 255.0 ) * ( static_cast<Real>(this->JitterRadius) - 1.0 ) );
                //Integer MaxDist = Radius * 2 + 1;
                for( Integer Y = 0; Y < TargetHeight ; ++Y )
                {
                    for( Integer X = 0; X < TargetWidth ; ++X )
                    {
                        Integer NewX = X + ( NumGen.GenerateUInt() % ( Radius * 2 + 1 ) ) - Radius;
                        Integer NewY = Y + ( NumGen.GenerateUInt() % ( Radius * 2 + 1 ) ) - Radius;

                        if( NewX >= 0 && NewX < TargetWidth && NewY >= 0 && NewY < TargetHeight ) {
                            TempBuffer.SetPixel(static_cast<Whole>(NewX),static_cast<Whole>(NewY), Buffer.GetPixel(static_cast<Whole>(X),static_cast<Whole>(Y)) );
                        }
                    }
                }
                Buffer.SetData(TempBuffer);
            }

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

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

            JitterModifier& JitterModifier::SetGeneratorSeed(const Whole Seed)
            {
                this->GeneratorSeed = Seed;
                return *this;
            }

            JitterModifier& JitterModifier::SetJitterRadius(const UInt16 Radius)
            {
                this->JitterRadius = Radius;
                return *this;
            }
        }//Procedural
    }//Graphics
}//Mezzanine

#endif