Hello Josef,
On 02/08/2011 03:42 AM, Josef Grunig wrote:
I've noticed that Multipass Materials weren't correctly handled by
OpenSG 1.8 when added to a PolygonForeground:
http://www.mail-archive.com/opensg-users@lists.sourceforge.net/msg07826.html
Here I attach the whole cpp I modified starting from a quite old
revision of OpenSG. Sorry no diff because of server being down.
Should work for SwitchMaterial and MultipassMaterial. I'm not handling
CGFXMaterials, because don't know much about that material.
Please have a look at the source, I'm not that confident in coding in OpenSG...
thank you for the contribution. Looking over the code I was wondering if
the attached, simpler code wouldn't work too? I assume you have a
use/test case for this, I'd really appreciate it if you could give this
version a try, since it does not require explicit knowledge about
Switch- or MultiPassMaterial, thanks!
Cheers,
Carsten
/*---------------------------------------------------------------------------*\
* OpenSG *
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* Copyright (C) 2000-2002 by the OpenSG Forum *
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* www.opensg.org *
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* contact: d...@opensg.org, gerrit.v...@vossg.org, jb...@zgdv.de *
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\*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*\
* License *
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* 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. *
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* 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. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
\*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*\
* Changes *
* *
* *
* *
* *
* *
* *
\*---------------------------------------------------------------------------*/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <stdlib.h>
#include <stdio.h>
#include <OSGConfig.h>
#include <OSGViewport.h>
#include <OSGMaterial.h>
#include <OSGCamera.h>
#include <OSGTileCameraDecorator.h>
#include "OSGPolygonForeground.h"
OSG_USING_NAMESPACE
/***************************************************************************\
* Description *
\***************************************************************************/
/*! \class osg::PolygonForeground
\ingroup GrpSystemWindowForegrounds
A foreground that renders a single polygon used the specified material,
see \ref PageSystemPolygonForeground for a
description.
The polygon material is defined by _sfMaterial, the positions by _mfPositions,
the texture coordinates by _mfTexCoords. The interpretation of the positions is
controlled by _sfNormalizedX and _sfNormalizedY.
*/
/***************************************************************************\
* Class variables *
\***************************************************************************/
/***************************************************************************\
* Class methods *
\***************************************************************************/
void PolygonForeground::initMethod (void)
{
}
/***************************************************************************\
* Instance methods *
\***************************************************************************/
/*-------------------------------------------------------------------------*\
- private -
\*-------------------------------------------------------------------------*/
/*----------------------- constructors & destructors ----------------------*/
PolygonForeground::PolygonForeground(void) :
Inherited()
{
}
PolygonForeground::PolygonForeground(const PolygonForeground &source) :
Inherited(source)
{
}
PolygonForeground::~PolygonForeground(void)
{
}
/*----------------------------- class specific ----------------------------*/
void PolygonForeground::changed(BitVector whichField, UInt32 origin)
{
Inherited::changed(whichField, origin);
}
void PolygonForeground::dump( UInt32 ,
const BitVector ) const
{
SLOG << "Dump PolygonForeground NI" << std::endl;
}
Real32 PolygonForeground::mapCoordinate(Real32 val, Real32 max, bool norm)
{
if(val >= 0)
{
if (norm)
val *= max;
}
else
{
val += 1;
if (norm)
val *= max;
val = max + val;
}
return val;
}
void PolygonForeground::draw(DrawActionBase *act, Viewport *port)
{
if(getActive() == false)
return;
if(getMFPositions()->getSize() == 0) // nothing to render
return;
if(port->getPixelWidth() == 0 ||
port->getPixelHeight() == 0 ) // nothing to render to
return;
if(getMFPositions()->getSize() != getMFTexCoords()->getSize())
{
FWARNING(("PolygonForeground::draw: positions and texcoords have "
"different sizes (%d vs. %d)!\n",
getMFPositions()->getSize(), getMFTexCoords()->getSize()));
return;
}
glPushAttrib(GL_ALL_ATTRIB_BITS);
Real32 aspectX = 1.0f, aspectY = 1.0f;
if (getAspectHeight() && getAspectWidth())
{
aspectX = (Real32(port->getPixelHeight())/getAspectHeight()) /
(Real32(port->getPixelWidth()) / getAspectWidth());
}
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
Real32 sFac = getScale() > 0 ? getScale() : 1.0f;
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 = getCPtr(cdP->getDecoratee());
cdP = dynamic_cast<TileCameraDecorator*>(cP);
}
cP = act->getCamera();
cdP = dynamic_cast<TileCameraDecorator*>(cP);
if (cdP && !getTile())
{
Real32 t = 0,
left = cdP->getLeft(),
right = cdP->getRight(),
top = cdP->getTop(),
bottom = cdP->getBottom();
if (getAspectHeight() && getAspectWidth() &&
height != 0 && width != 0)
{
aspectX = (Real32(height)/getAspectHeight()) /
(Real32(width) / getAspectWidth());
t = Real32(width) * (1 - aspectX) * 0.5f;
t *= Real32(port->getPixelWidth()) / width;
}
Matrix sm;
cP->getDecoration(sm, width, height);
glLoadMatrixf(sm.getValues());
glOrtho(0, port->getPixelWidth(), 0, port->getPixelHeight(), 0, 1);
glTranslatef(t, 0, 0);
glScalef(aspectX, aspectY, 1);
float t1 = (1 - sFac) * 0.5f * Real32(port->getPixelWidth());
float t2 = (1 - sFac) * 0.5f * Real32(port->getPixelHeight());
glTranslatef(t1, t2, 0);
glScalef(sFac,sFac,1);
}
else
{
glScalef(sFac,sFac,1);
glScalef(aspectX, aspectY, 1);
glOrtho(0, port->getPixelWidth(), 0, port->getPixelHeight(), 0, 1);
}
const Vec3f *tc = &getTexCoords(0);
const Pnt2f *pos = &getPositions(0);
UInt32 numPasses = getMaterial()->getNPasses();
State *activeState = NULL;
State *nextState = NULL;
for(UInt32 i = 0; i < numPasses; ++i)
{
nextState = getCPtr(getMaterial()->getState(i));
if(activeState != NULL)
{
nextState->changeFrom(act, activeState);
}
else
{
nextState->activate(act);
}
activeState = nextState;
glBegin(GL_POLYGON);
for (UInt16 i = 0; i < getMFPositions()->size(); i++)
{
glTexCoord3fv( tc[i].getValues() );
glVertex2f( mapCoordinate(pos[i][0],
Real32(port->getPixelWidth()),
getNormalizedX() ),
mapCoordinate(pos[i][1],
Real32(port->getPixelHeight()),
getNormalizedY()) );
}
glEnd();
}
if(activeState != NULL)
{
activeState->deactivate(act);
}
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glPopAttrib();
}
/*------------------------------------------------------------------------*/
/* 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: OSGPolygonForeground.cpp,v 1.8 2008/06/10 05:52:20 vossg Exp $";
static Char8 cvsid_hpp [] = OSGPOLYGONFOREGROUNDBASE_HEADER_CVSID;
static Char8 cvsid_inl [] = OSGPOLYGONFOREGROUNDBASE_INLINE_CVSID;
static Char8 cvsid_fields_hpp[] = OSGPOLYGONFOREGROUNDFIELDS_HEADER_CVSID;
}
#ifdef __sgi
#pragma reset woff 1174
#endif
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