OSGPointLight.cpp

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/*---------------------------------------------------------------------------*\
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
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\*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*\
 *                                Changes                                    *
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\*---------------------------------------------------------------------------*/

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

#include "OSGConfig.h"

#include <OSGGL.h>

#include <OSGDrawAction.h>
#include <OSGRenderAction.h>
#include "OSGPointLight.h"

OSG_USING_NAMESPACE

/*----------------------------- class variables ---------------------------*/

StatElemDesc<StatIntElem>  PointLight::statNPointLights(
"NPointLights", "number of point light sources");

/*-------------------------------------------------------------------------*/
/*                                Set                                      */

void PointLight::setPosition(Real32 rX, Real32 rY, Real32 rZ)
{
    _sfPosition.getValue().setValues(rX, rY, rZ);
}

void PointLight::setAttenuation(Real32 rConstant, 
                                Real32 rLinear, 
                                Real32 rQuadratic)
{
    _sfConstantAttenuation .setValue(rConstant );
    _sfLinearAttenuation   .setValue(rLinear   );
    _sfQuadraticAttenuation.setValue(rQuadratic);
}

/*-------------------------------------------------------------------------*/
/*                             Chunk                                       */

void PointLight::makeChunk(void)
{
    Inherited::makeChunk();

    Vec4f pos(_sfPosition.getValue());

    pos[3] = 1;
   
    _pChunk->setPosition            (pos                      );
    _pChunk->setConstantAttenuation (getConstantAttenuation ());
    _pChunk->setLinearAttenuation   (getLinearAttenuation   ());
    _pChunk->setQuadraticAttenuation(getQuadraticAttenuation());
}

/*-------------------------------------------------------------------------*/
/*                             Changed                                     */

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

/*-------------------------------------------------------------------------*/
/*                                Dump                                     */

void PointLight::dump(      UInt32    uiIndent, 
                      const BitVector bvFlags) const
{
   Inherited::dump(uiIndent, bvFlags);
}

/*-------------------------------------------------------------------------*/
/*                            Constructors                                 */

PointLight::PointLight(void) :
    Inherited()
{
}

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

/*-------------------------------------------------------------------------*/
/*                             Destructor                                  */

PointLight::~PointLight(void)
{
}

/*-------------------------------------------------------------------------*/
/*                               Drawing                                   */

Action::ResultE PointLight::drawEnter(Action *action)
{   
    if(getOn() == false)
        return Action::Continue;

    DrawAction *da    = dynamic_cast<DrawAction *>(action);
    GLenum      light = GL_LIGHT0 + da->getLightCount();
    
    Light::drawEnter(action);

    Vec4f pos(_sfPosition.getValue());

    pos[3] = 1;

    glLightfv(light, GL_POSITION   , pos.getValues());
    glLightf (light, GL_SPOT_CUTOFF, 180.f          );

    glPopMatrix();

    da->getStatistics()->getElem(PointLight::statNPointLights)->inc();

    return Action::Continue;
}
    
Action::ResultE PointLight::drawLeave(Action *action)
{
    if(getOn() == false)
        return Action::Continue;

    return Light::drawLeave(action);
}

/*-------------------------------------------------------------------------*/
/*                             Rendering                                   */

Action::ResultE PointLight::renderEnter(Action *action)
{
    if(getOn() == false)
        return Action::Continue;

    DrawActionBase *da    = dynamic_cast<DrawActionBase *>(action);
    da->getStatistics()->getElem(PointLight::statNPointLights)->inc();

    return Light::renderEnter(action);
}

Action::ResultE PointLight::renderLeave(Action *action)
{
    if(getOn() == false)
        return Action::Continue;

    return Light::renderLeave(action);
}

/*-------------------------------------------------------------------------*/
/*                               Init                                      */

void PointLight::initMethod (void)
{
    DrawAction::registerEnterDefault( 
        getClassType(), 
        osgTypedMethodFunctor2BaseCPtrRef<
            Action::ResultE,
            PointLightPtr    , 
            CNodePtr         ,  
            Action          *>(&PointLight::drawEnter));

    DrawAction::registerLeaveDefault( 
        getClassType(), 
        osgTypedMethodFunctor2BaseCPtrRef<
            Action::ResultE,
            PointLightPtr    , 
            CNodePtr         ,  
            Action          *>(&PointLight::drawLeave));

    RenderAction::registerEnterDefault( 
        getClassType(), 
        osgTypedMethodFunctor2BaseCPtrRef<
            Action::ResultE,
            PointLightPtr    , 
            CNodePtr         ,  
            Action          *>(&PointLight::renderEnter));

    RenderAction::registerLeaveDefault( 
        getClassType(), 
        osgTypedMethodFunctor2BaseCPtrRef<
            Action::ResultE,
            PointLightPtr    , 
            CNodePtr         ,  
            Action          *>(&PointLight::renderLeave));
}


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

#ifdef __sgi
#pragma set woff 1174
#endif

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

namespace
{
    static Char8 cvsid_cpp[] = "@(#)$Id: $";
    static Char8 cvsid_hpp[] = OSGPOINTLIGHT_HEADER_CVSID;
    static Char8 cvsid_inl[] = OSGPOINTLIGHT_INLINE_CVSID;
}

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