OSGGradientBackground.cpp

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/*---------------------------------------------------------------------------*\
 *                                OpenSG                                     *
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 *             Copyright (C) 2000-2002 by the OpenSG Forum                   *
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 *   contact: dirk@opensg.org, gerrit.voss@vossg.org, jbehr@zgdv.de          *
 *                                                                           *
\*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*\
 *                                License                                    *
 *                                                                           *
 * This library is free software; you can redistribute it and/or modify it   *
 * under the terms of the GNU Library General Public License as published    *
 * by the Free Software Foundation, version 2.                               *
 *                                                                           *
 * This library 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         *
 * Library General Public License for more details.                          *
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 * License along with this library; ifnot, write to the Free Software       *
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 *                                Changes                                    *
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\*---------------------------------------------------------------------------*/

//---------------------------------------------------------------------------
//  Includes
//---------------------------------------------------------------------------

#include <stdlib.h>
#include <stdio.h>

#include "OSGConfig.h"

#include <OSGGL.h>

#include <OSGFieldContainer.h>
#include <OSGNode.h>
#include <OSGAction.h>
#include <OSGDrawAction.h>
#include "OSGViewport.h"
#include "OSGCamera.h"
#include "OSGWindow.h"
#include "OSGBackground.h"
#include "OSGGradientBackground.h"
#include "OSGTileCameraDecorator.h"

OSG_USING_NAMESPACE


/***************************************************************************\
 *                            Description                                  *
\***************************************************************************/

/***************************************************************************\
 *                           Class variables                               *
\***************************************************************************/

const OSG::BitVector  GradientBackground::LineFieldMask = 
                     (GradientBackground::PositionFieldMask | 
                      GradientBackground::ColorFieldMask   );

/***************************************************************************\
 *                           Class methods                                 *
\***************************************************************************/

void GradientBackground::initMethod (void)
{
}

/***************************************************************************\
 *                           Instance methods                              *
\***************************************************************************/

/*------------- constructors & destructors --------------------------------*/

GradientBackground::GradientBackground(void) :
    Inherited()
{
}

GradientBackground::GradientBackground(const GradientBackground &source) :
    Inherited(source)
{
}

GradientBackground::~GradientBackground(void)
{
}

void GradientBackground::changed(BitVector whichField, UInt32 origin)
{
    Inherited::changed(whichField, origin);
}

/*-------------------------- your_category---------------------------------*/

void GradientBackground::clear(DrawActionBase *act, Viewport *port)
{
    Int32 bit = getClearStencilBit();
    
    if(_mfPosition.size() < 2)
    {
        Real32 r = 0, g = 0, b = 0;
        
        if(_mfPosition.size() == 1)
        {
            Color3f col = _mfColor[0];
            col.getValuesRGB(r, g, b);
        }
        
        glClearColor(r, g, b, 1);
        
        if (bit >= 0)
        {
            glClearStencil(bit);
            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
        }
        else
        {
            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        }
    }
    else
    {
        glPushAttrib(GL_POLYGON_BIT | GL_DEPTH_BUFFER_BIT | 
                     GL_LIGHTING_BIT);

        glDisable(GL_LIGHTING);
        glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
        glDisable(GL_DEPTH_TEST);
        glDisable(GL_COLOR_MATERIAL);

        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();

        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();

        UInt32 width  = port->getPixelWidth(),
               height = port->getPixelHeight();

        Camera *cP = act->getCamera();
        TileCameraDecorator *cdP = dynamic_cast<TileCameraDecorator*>(cP);

        while (cdP != NULL)
        {
            width  = cdP->getFullWidth()  ? cdP->getFullWidth()  : width;
            height = cdP->getFullHeight() ? cdP->getFullHeight() : height;

            cP  = cdP->getDecoratee().getCPtr();
            cdP = dynamic_cast<TileCameraDecorator*>(cP);
        }

        cP = act->getCamera();
        cdP = dynamic_cast<TileCameraDecorator*>(cP);

        if (cdP)
        {
            Real32 left   = cdP->getLeft(),
                   right  = cdP->getRight(),
                   top    = cdP->getTop(),
                   bottom = cdP->getBottom();

            glOrtho( left , right, bottom, top, 0, 1);
        }
        else
        {
            glOrtho(0, 1, 0, 1, 0, 1);
        }

        Real32 r1, g1, b1;
        UInt32 size = _mfPosition.size();

        glBegin(GL_QUAD_STRIP);
        
        Real32 pos = _mfPosition[0];
        if(pos > 0) 
        {
            glColor3f(0.0, 0.0, 0.0);
            glVertex3f(0, 0, 0);
            glVertex3f(1, 0, 0);
        }

        for(UInt32 i = 0; i < size; i++)
        {
            pos = _mfPosition[i];

            Color3f col1 = _mfColor[i];
            col1.getValuesRGB(r1, g1, b1);

            glColor3f(r1, g1, b1);
            glVertex3f(0, pos, 0);
            glVertex3f(1, pos, 0);
        }

        if(pos < 1) 
        {
            glColor3f(0.0, 0.0, 0.0);
            glVertex3f(0, 1, 0);
            glVertex3f(1, 1, 0);
        }
        
        glEnd();

        glPopMatrix();
        glMatrixMode(GL_MODELVIEW);
        glPopMatrix();

        glPopAttrib();
        
        if (bit >= 0)
        {
            glClearStencil(bit);
            glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
        }
        else
        {
            glClear(GL_DEPTH_BUFFER_BIT);
        }
    }
}

/*------------------------------- dump ----------------------------------*/

void GradientBackground::dump(     UInt32    OSG_CHECK_ARG(uiIndent), 
                              const BitVector OSG_CHECK_ARG(bvFlags)) const
{
    SLOG << "Dump GradientBackground NI" << std::endl;
}

 

/*------------------------------------------------------------------------*/
/*                              cvs id's                                  */

#ifdef OSG_SGI_CC
#pragma set woff 1174
#endif

#ifdef OSG_LINUX_ICC
#pragma warning( disable : 177 )
#endif

namespace
{
    static Char8 cvsid_cpp       [] = "@(#)$Id: FCTemplate_cpp.h,v 1.13 2002/06/01 10:37:25 vossg Exp $";
    static Char8 cvsid_hpp       [] = OSGGRADIENTBACKGROUND_HEADER_CVSID;
    static Char8 cvsid_inl       [] = OSGGRADIENTBACKGROUND_INLINE_CVSID;

    static Char8 cvsid_fields_hpp[] = OSGGRADIENTBACKGROUNDFIELDS_HEADER_CVSID;
}

#ifdef __sgi
#pragma reset woff 1174
#endif

---