randompixelsmodifier.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 _graphicsproceduralrandompixelsmodifier_cpp
#define _graphicsproceduralrandompixelsmodifier_cpp

#include "Graphics/Procedural/Texture/randompixelsmodifier.h"
#include "Graphics/Procedural/Texture/rectanglemodifier.h"

#include "MathTools/mathtools.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            RandomPixelsModifier::RandomPixelsModifier() :
                PixelColour(1.0,1.0,1.0,1.0),
                PixelCount(0),
                GeneratorSeed(5120)
                {  }

            RandomPixelsModifier::~RandomPixelsModifier()
                {  }

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

            void RandomPixelsModifier::Modify(TextureBuffer& Buffer)
            {
                IntVector2 Point;
                std::vector<IntVector2> PixelList;

                MathTools::MersenneTwisterGenerator32 NumGen(this->GeneratorSeed);
                Whole Area = Buffer.GetWidth() * Buffer.GetHeight();
                Whole GenerateCount = this->PixelCount;
                if( GenerateCount == 0 ) {
                    GenerateCount = ( static_cast<Whole>( MathTools::Sqrt( static_cast<Real>( Buffer.GetWidth() ) ) ) + static_cast<Whole>( MathTools::Sqrt( static_cast<Real>( Buffer.GetHeight() ) ) ) ) * 10;
                }

                if( GenerateCount == Area ) {
                    RectangleModifier().SetColour(this->PixelColour).Modify(Buffer);
                    return;
                }

                while( PixelList.size() != GenerateCount )
                {
                    Point.X = NumGen.GenerateUInt() % Buffer.GetWidth();
                    Point.Y = NumGen.GenerateUInt() % Buffer.GetHeight();

                    Boole InList = false;
                    for( std::vector<IntVector2>::iterator iter = PixelList.begin() ; iter != PixelList.end() ; iter++ )
                    {
                        if( iter->X == Point.X && iter->Y == Point.Y ) {
                            InList = true;
                            break;
                        }
                    }

                    if( !InList ) {
                        PixelList.push_back(Point);
                        Buffer.SetPixel(Point.X, Point.Y, this->PixelColour);
                    }
                }
            }

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

            RandomPixelsModifier& RandomPixelsModifier::SetColour(const ColourValue& Colour)
                { this->PixelColour = Colour;  return *this; }

            RandomPixelsModifier& RandomPixelsModifier::SetColour(const Real Red, const Real Green, const Real Blue, const Real Alpha)
                { this->PixelColour.SetValues(Red,Green,Blue,Alpha);  return *this; }

            RandomPixelsModifier& RandomPixelsModifier::SetColour(const UInt8 Red, const UInt8 Green, const UInt8 Blue, const UInt8 Alpha)
                { this->PixelColour.SetValues(static_cast<Real>(Red) / 255.0,static_cast<Real>(Green) / 255.0,static_cast<Real>(Blue) / 255.0,static_cast<Real>(Alpha) / 255.0);  return *this; }

            RandomPixelsModifier& RandomPixelsModifier::SetPixelCount(const Whole Count)
                { this->PixelCount = Count;  return *this; }

            RandomPixelsModifier& RandomPixelsModifier::SetSeed(const Whole Seed)
                { this->GeneratorSeed = Seed;  return *this; }
        }//Procedural
    }//Graphics
}//Mezzanine

#endif