SVertexManipulator.h

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// Copyright (C) 2009-2012 Christian Stehno
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __S_VERTEX_MANIPULATOR_H_INCLUDED__
#define __S_VERTEX_MANIPULATOR_H_INCLUDED__

#include "S3DVertex.h"
#include "SColor.h"

namespace irr
{
namespace scene
{

    class IMesh;
    class IMeshBuffer;
    struct SMesh;


    struct IVertexManipulator
    {
    };
    class SVertexColorSetManipulator : public IVertexManipulator
    {
    public:
        SVertexColorSetManipulator(video::SColor color) : Color(color) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color=Color;
        }
    private:
        video::SColor Color;
    };
    class SVertexColorSetAlphaManipulator : public IVertexManipulator
    {
    public:
        SVertexColorSetAlphaManipulator(u32 alpha) : Alpha(alpha) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setAlpha(Alpha);
        }
    private:
        u32 Alpha;
    };
    class SVertexColorInvertManipulator : public IVertexManipulator
    {
    public:
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setRed(255-vertex.Color.getRed());
            vertex.Color.setGreen(255-vertex.Color.getGreen());
            vertex.Color.setBlue(255-vertex.Color.getBlue());
        }
    };

    class SVertexColorThresholdManipulator : public IVertexManipulator
    {
    public:
        SVertexColorThresholdManipulator(u8 threshold, video::SColor low,
            video::SColor high) : Threshold(threshold), Low(low), High(high) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color = ((u8)vertex.Color.getAverage()>Threshold)?High:Low;
        }
    private:
        u8 Threshold;
        video::SColor Low;
        video::SColor High;
    };

    class SVertexColorBrightnessManipulator : public IVertexManipulator
    {
    public:
        SVertexColorBrightnessManipulator(s32 amount) : Amount(amount) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setRed(core::clamp(vertex.Color.getRed()+Amount, 0u, 255u));
            vertex.Color.setGreen(core::clamp(vertex.Color.getGreen()+Amount, 0u, 255u));
            vertex.Color.setBlue(core::clamp(vertex.Color.getBlue()+Amount, 0u, 255u));
        }
    private:
        s32 Amount;
    };

    class SVertexColorContrastManipulator : public IVertexManipulator
    {
    public:
        SVertexColorContrastManipulator(f32 factor) : Factor(factor) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setRed(core::clamp(core::round32((vertex.Color.getRed()-128)*Factor)+128, 0, 255));
            vertex.Color.setGreen(core::clamp(core::round32((vertex.Color.getGreen()-128)*Factor)+128, 0, 255));
            vertex.Color.setBlue(core::clamp(core::round32((vertex.Color.getBlue()-128)*Factor)+128, 0, 255));
        }
    private:
        f32 Factor;
    };

    class SVertexColorContrastBrightnessManipulator : public IVertexManipulator
    {
    public:
        SVertexColorContrastBrightnessManipulator(f32 factor, s32 amount) : Factor(factor), Amount(amount+128) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setRed(core::clamp(core::round32((vertex.Color.getRed()-128)*Factor)+Amount, 0, 255));
            vertex.Color.setGreen(core::clamp(core::round32((vertex.Color.getGreen()-128)*Factor)+Amount, 0, 255));
            vertex.Color.setBlue(core::clamp(core::round32((vertex.Color.getBlue()-128)*Factor)+Amount, 0, 255));
        }
    private:
        f32 Factor;
        s32 Amount;
    };

    class SVertexColorGammaManipulator : public IVertexManipulator
    {
    public:
        SVertexColorGammaManipulator(f32 gamma) : Gamma(1.f)
        {
            if (gamma != 0.f)
                Gamma = 1.f/gamma;
        }
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setRed(core::clamp(core::round32(powf((f32)(vertex.Color.getRed()),Gamma)), 0, 255));
            vertex.Color.setGreen(core::clamp(core::round32(powf((f32)(vertex.Color.getGreen()),Gamma)), 0, 255));
            vertex.Color.setBlue(core::clamp(core::round32(powf((f32)(vertex.Color.getBlue()),Gamma)), 0, 255));
        }
    private:
        f32 Gamma;
    };

    class SVertexColorScaleManipulator : public IVertexManipulator
    {
    public:
        SVertexColorScaleManipulator(f32 factor) : Factor(factor) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color.setRed(core::clamp(core::round32(vertex.Color.getRed()*Factor), 0, 255));
            vertex.Color.setGreen(core::clamp(core::round32(vertex.Color.getGreen()*Factor), 0, 255));
            vertex.Color.setBlue(core::clamp(core::round32(vertex.Color.getBlue()*Factor), 0, 255));
        }
    private:
        f32 Factor;
    };

    class SVertexColorDesaturateToLightnessManipulator : public IVertexManipulator
    {
    public:
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color=core::round32(vertex.Color.getLightness());
        }
    };

    class SVertexColorDesaturateToAverageManipulator : public IVertexManipulator
    {
    public:
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color=vertex.Color.getAverage();
        }
    };

    class SVertexColorDesaturateToLuminanceManipulator : public IVertexManipulator
    {
    public:
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color=core::round32(vertex.Color.getLuminance());
        }
    };

    class SVertexColorInterpolateLinearManipulator : public IVertexManipulator
    {
    public:
        SVertexColorInterpolateLinearManipulator(video::SColor color, f32 factor) :
          Color(color), Factor(factor) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color=vertex.Color.getInterpolated(Color, Factor);
        }
    private:
        video::SColor Color;
        f32 Factor;
    };

    class SVertexColorInterpolateQuadraticManipulator : public IVertexManipulator
    {
    public:
        SVertexColorInterpolateQuadraticManipulator(video::SColor color1, video::SColor color2, f32 factor) :
          Color1(color1), Color2(color2), Factor(factor) {}
        void operator()(video::S3DVertex& vertex) const
        {
            vertex.Color=vertex.Color.getInterpolated_quadratic(Color1, Color2, Factor);
        }
    private:
        video::SColor Color1;
        video::SColor Color2;
        f32 Factor;
    };

    class SVertexPositionScaleManipulator : public IVertexManipulator
    {
    public:
        SVertexPositionScaleManipulator(const core::vector3df& factor) : Factor(factor) {}
        template <typename VType>
        void operator()(VType& vertex) const
        {
            vertex.Pos *= Factor;
        }
    private:
        core::vector3df Factor;
    };


    class SVertexPositionScaleAlongNormalsManipulator : public IVertexManipulator
    {
    public:
        SVertexPositionScaleAlongNormalsManipulator(const core::vector3df& factor) : Factor(factor) {}
        template <typename VType>
        void operator()(VType& vertex) const
        {
            vertex.Pos += vertex.Normal*Factor;
        }
    private:
        core::vector3df Factor;
    };

    class SVertexPositionTransformManipulator : public IVertexManipulator
    {
    public:
        SVertexPositionTransformManipulator(const core::matrix4& m) : Transformation(m) {}
        template <typename VType>
        void operator()(VType& vertex) const
        {
            Transformation.transformVect(vertex.Pos);
        }
    private:
        core::matrix4 Transformation;
    };

    class SVertexTCoordsScaleManipulator : public IVertexManipulator
    {
    public:
        SVertexTCoordsScaleManipulator(const core::vector2df& factor, u32 uvSet=1) : Factor(factor), UVSet(uvSet) {}
        void operator()(video::S3DVertex2TCoords& vertex) const
        {
            if (1==UVSet)
                vertex.TCoords *= Factor;
            else if (2==UVSet)
                vertex.TCoords2 *= Factor;
        }
        template <typename VType>
        void operator()(VType& vertex) const
        {
            if (1==UVSet)
                vertex.TCoords *= Factor;
        }
    private:
        core::vector2df Factor;
        u32 UVSet;
    };

} // end namespace scene
} // end namespace irr


#endif