FGFS-4.1/OpenSceneGraph
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Flesh out more of basic ShadowTechnique and ShadowedScene API.

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This commit is contained in:
Robert Osfield 2007-02-08 17:23:40 +00:00
parent 47622e6134
commit 95befaf1ed
5 changed files with 120 additions and 24 deletions
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17
examples/osgshadow/osgshadow.cpp
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@ -23,6 +23,8 @@
#include <osgViewer/StatsHandler>
#include <osgShadow/OccluderGeometry>
#include <osgShadow/ShadowedScene>
#include <osgShadow/ShadowVolume>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
@ -566,6 +568,9 @@ int main(int argc, char** argv)
while (arguments.read("--two-sided")) drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED;
while (arguments.read("--two-pass")) drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_PASS;
bool ShadowVolume = false;
while (arguments.read("--ShadowVolume")) ShadowVolume = true;
// set up the camera manipulators.
{
@ -680,7 +685,17 @@ int main(int argc, char** argv)
osg::ref_ptr<osg::Light> light = new osg::Light;
light->setPosition(lightpos);
if (!doShadow)
if (ShadowVolume)
{
osg::ref_ptr<osgShadow::ShadowedScene> shadowedScene = new osgShadow::ShadowedScene;
shadowedScene->setShadowTechnique(new osgShadow::ShadowVolume);
shadowedScene->addChild(model.get());
group->addChild(shadowedScene.get());
}
else if (!doShadow)
{
group->addChild(model.get());

17
include/osgShadow/ShadowTechnique
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@ -35,11 +35,28 @@ class OSGSHADOW_EXPORT ShadowTechnique : public osg::Object
ShadowTechnique(const ShadowTechnique& es, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
META_Object(osgShadow, ShadowTechnique);
ShadowedScene* getShadowedScene() { return _shadowedScene; }
virtual void init();
virtual void update(osg::NodeVisitor& nv);
virtual void cull(osg::NodeVisitor& nv);
virtual void traverse(osg::NodeVisitor& nv);
virtual void dirty() { _dirty = true; }
protected :
virtual ~ShadowTechnique() {}
friend class ShadowedScene;
ShadowedScene* _shadowedScene;
bool _dirty;
};
}

13
include/osgShadow/ShadowedScene
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@ -26,7 +26,8 @@ namespace osgShadow {
/** ShadowedScene provides a mechansim for decorating a scene that the needs to have shadows cast upon it.*/
class OSGSHADOW_EXPORT ShadowedScene : public osg::Group
{
public :
public:
ShadowedScene();
ShadowedScene(const ShadowedScene& es, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
@ -44,11 +45,13 @@ class OSGSHADOW_EXPORT ShadowedScene : public osg::Group
void setShadowTechnique(ShadowTechnique* technique);
ShadowTechnique* getShadowTechnique() { return _shadowTechnique.get(); }
const ShadowTechnique* getShadowTechnique() const { return _shadowTechnique.get(); }
protected :
virtual ~ShadowedScene() {}
/** Dirty any cache data structures held in the attached ShadowTechnqiue.*/
void dirty();
protected:
virtual ~ShadowedScene();
unsigned int _recievesShadowTraversalMask;
unsigned int _castsShadowTraversalMask;

49
src/osgShadow/ShadowTechnique.cpp
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@ -12,14 +12,59 @@
*/
#include <osgShadow/ShadowTechnique>
#include <osgShadow/ShadowedScene>
#include <osg/Notify>
using namespace osgShadow;
ShadowTechnique::ShadowTechnique()
ShadowTechnique::ShadowTechnique():
_shadowedScene(0),
_dirty(true)
{
}
ShadowTechnique::ShadowTechnique(const ShadowTechnique& copy, const osg::CopyOp& copyop):
osg::Object(copy,copyop)
osg::Object(copy,copyop),
_shadowedScene(0),
_dirty(true)
{
}
void ShadowTechnique::init()
{
osg::notify(osg::NOTICE)<<className()<<"::init() not implemened yet"<<std::endl;
_dirty = false;
}
void ShadowTechnique::update(osg::NodeVisitor& nv)
{
osg::notify(osg::NOTICE)<<className()<<"::update(osg::NodeVisitor&) not implemened yet."<<std::endl;
_shadowedScene->osg::Group::traverse(nv);
}
void ShadowTechnique::cull(osg::NodeVisitor& nv)
{
osg::notify(osg::NOTICE)<<className()<<"::cull(osg::NodeVisitor&) not implemened yet."<<std::endl;
_shadowedScene->osg::Group::traverse(nv);
}
void ShadowTechnique::traverse(osg::NodeVisitor& nv)
{
if (!_shadowedScene) return;
if (nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)
{
if (_dirty) init();
update(nv);
}
else if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
{
cull(nv);
}
else
{
_shadowedScene->osg::Group::traverse(nv);
}
}

48
src/osgShadow/ShadowedScene.cpp
View File

@ -32,26 +32,42 @@ ShadowedScene::ShadowedScene(const ShadowedScene& copy, const osg::CopyOp& copyo
setNumChildrenRequiringUpdateTraversal(getNumChildrenRequiringUpdateTraversal()+1);
}
ShadowedScene::~ShadowedScene()
{
setShadowTechnique(0);
}
void ShadowedScene::traverse(osg::NodeVisitor& nv)
{
if (nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)
if (_shadowTechnique.valid())
{
Group::traverse(nv);
return;
_shadowTechnique->traverse(nv);
}
if (nv.getVisitorType() != osg::NodeVisitor::CULL_VISITOR)
else
{
Group::traverse(nv);
return;
osg::Group::traverse(nv);
}
}
void ShadowedScene::setShadowTechnique(ShadowTechnique* technique)
{
if (_shadowTechnique == technique) return;
if (_shadowTechnique.valid()) _shadowTechnique->_shadowedScene = 0;
_shadowTechnique = technique;
if (_shadowTechnique.valid())
{
_shadowTechnique->_shadowedScene = this;
_shadowTechnique->dirty();
}
}
void ShadowedScene::dirty()
{
if (_shadowTechnique.valid())
{
_shadowTechnique->dirty();
}
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv);
if (!cv)
{
Group::traverse(nv);
return;
}
Group::traverse(nv);
}