HairRenderNode.h

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/*
-----------------------------------------------------------------------------
This source file is part of FRAPPER
research.animationsinstitut.de
sourceforge.net/projects/frapper

Copyright (c) 2008-2011 Filmakademie Baden-Wuerttemberg, Institute of Animation 

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/


#ifndef HAIRRENDERNODE_H
#define HAIRRENDERNODE_H

#include "GeometryRenderNode.h"
#include "OgreTools.h"

// OGRE
#include <Ogre.h>
#if (OGRE_PLATFORM  == OGRE_PLATFORM_WIN32)
#include <windows.h>
#endif

#define LIGHT_DEBUG

namespace HairRenderNode {
using namespace Frapper;

class ShadowTargetListener : public Ogre::RenderTargetListener
{
public: 
        ShadowTargetListener();
        ~ShadowTargetListener() {};

        void preRenderTargetUpdate (const Ogre::RenderTargetEvent &evt);
        void setDepthBias(const Ogre::Real bias);
        void setDepthOffset(const Ogre::Real offset);

private:
        Ogre::Pass *m_shadowCasterPass;
        Ogre::Real m_depthBias;
        Ogre::Real m_depthOffset;
};

class HairRenderNode : public GeometryRenderNode
{

    Q_OBJECT

public: // constructors and destructors

    HairRenderNode ( const QString &name, ParameterGroup *parameterRoot );

    virtual ~HairRenderNode ();

private slots:

        void loadLightDescriptionFile ();

    void setLightScale ();

        void setShaderParameter ();

        void setNbrLights();

        void setPassDepthBias();

        void setPassDepthOffset();

public slots: //

    void processOutputImage ();

public:
        void redrawTriggered();


private: // functions

        float greatestComponent(const Ogre::Vector3 &vec) const;

        void setCustomVertexShader();

        static bool greaterThan(const QPair<Ogre::Vector3, Ogre::Vector3> &d1, const QPair<Ogre::Vector3, Ogre::Vector3> &d2);

protected: // data

    Ogre::Light *m_sceneLight;
    
        Ogre::Camera *m_cameraCopy;

    Ogre::Image m_defaultTextureImage;

        QList<QPair<Ogre::Vector3, Ogre::Vector3>> m_lightPositions;

        ShadowTargetListener *m_shadowListener;

        float m_lightScale;


#ifdef LIGHT_DEBUG



    QString m_outputSecondImageName;
#endif

};

} // namespace HairRenderNode 

#endif