FGFS-4.1/OpenSceneGraph
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Added support for using the new osgShadow plugin as a psuedo loader such that:

Browse Source 
osgviewer cow.osg.shadow

Or to ShadowVolume rechnique specifically:

  osgviewer cow.osg.sv.shadow
This commit is contained in:
Robert Osfield 2007-02-15 22:28:32 +00:00
parent 1da57c124f
commit dbb7c3c74c
9 changed files with 204 additions and 19 deletions
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16
VisualStudio/osgPlugins/osgShadow/dot_osgShadow.dsp
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@ -158,27 +158,31 @@ LIB32=link.exe -lib
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ParallelSplitShadowMap.cpp.cpp
SOURCE=..\..\..\src\osgPlugins\osgShadow\ParallelSplitShadowMap.cpp
# End Source File
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowedScene.cpp.cpp
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowedScene.cpp
# End Source File
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowMap.cpp.cpp
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowMap.cpp
# End Source File
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowTechnique.cpp.cpp
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowTechnique.cpp
# End Source File
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowTexture.cpp.cpp
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowTexture.cpp
# End Source File
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowVolume.cpp.cpp
SOURCE=..\..\..\src\osgPlugins\osgShadow\ShadowVolume.cpp
# End Source File
# Begin Source File
SOURCE=..\..\..\src\osgPlugins\osgShadow\ReaderWriterOsgShadow.cpp
# End Source File
# End Group
# Begin Group "Header Files"

5
examples/osgshadow/osgshadow.cpp
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@ -453,9 +453,14 @@ int main(int argc, char** argv)
osg::ref_ptr<osg::LightSource> ls = new osg::LightSource;
ls->getLight()->setPosition(lightpos);
ls->getLight()->setAmbient(osg::Vec4(1.0,0.0,0.0,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.0,1.0,0.0,1.0));
shadowedScene->addChild(model.get());
shadowedScene->addChild(ls.get());
osgDB::writeNodeFile(*shadowedScene, "shadow.osg");
viewer.setSceneData(shadowedScene.get());

2
examples/osgshadowtexture/GNUmakefile
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@ -5,7 +5,7 @@ CXXFILES =\
CreateShadowedScene.cpp\
osgshadowtexture.cpp\
LIBS += -losgViewer -losgText -losgGA -losgDB -losgUtil -losg $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)
LIBS += -losgShadow -losgViewer -losgText -losgGA -losgDB -losgUtil -losg $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)
INSTFILES = \
$(CXXFILES)\

43
examples/osgshadowtexture/osgshadowtexture.cpp
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@ -13,6 +13,8 @@
#include <osgViewer/Viewer>
#include <osgShadow/ShadowedScene>
#include <osgShadow/ShadowVolume>
// include the call which creates the shadowed subgraph.
#include "CreateShadowedScene.h"
@ -133,7 +135,7 @@ osg::Node* createMovingModel(const osg::Vec3& center, float radius)
positioned->addChild(cessna);
osg::MatrixTransform* xform = new osg::MatrixTransform;
xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0f,2.0));
//xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0f,2.0));
xform->addChild(positioned);
model->addChild(xform);
@ -145,7 +147,7 @@ osg::Node* createMovingModel(const osg::Vec3& center, float radius)
osg::Node* createModel()
osg::Node* createModel(osg::ArgumentParser& arguments)
{
osg::Vec3 center(0.0f,0.0f,0.0f);
float radius = 100.0f;
@ -156,21 +158,48 @@ osg::Node* createModel()
// the shadowed model
osg::Node* shadowed = createBase(center-osg::Vec3(0.0f,0.0f,radius*0.25),radius);
if (arguments.read("--osgShadow"))
{
osgShadow::ShadowedScene* shadowedScene = new osgShadow::ShadowedScene;
osg::ref_ptr<osgShadow::ShadowVolume> shadowVolume = new osgShadow::ShadowVolume;
shadowedScene->setShadowTechnique(shadowVolume.get());
shadowVolume->setDynamicShadowVolumes(true);
// combine the models together to create one which has the shadower and the shadowed with the required callback.
osg::Group* root = createShadowedScene(shadower,shadowed,lightPosition,radius/100.0f,1);
osg::ref_ptr<osg::LightSource> ls = new osg::LightSource;
ls->getLight()->setPosition(osg::Vec4(0,1,1,0.0));
ls->getLight()->setAmbient(osg::Vec4(0.0,0.0,1.0,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.0,1.0,0.0,1.0));
return root;
shadowedScene->addChild(shadower);
shadowedScene->addChild(shadowed);
shadowedScene->addChild(ls.get());
return shadowedScene;
}
else
{
// combine the models together to create one which has the shadower and the shadowed with the required callback.
osg::Group* root = createShadowedScene(shadower,shadowed,lightPosition,radius/100.0f,1);
return root;
}
}
int main(int, char **)
int main(int argc, char ** argv)
{
osg::ArgumentParser arguments(&argc,argv);
// construct the viewer.
osgViewer::Viewer viewer;
// pass the model to the viewer.
viewer.setSceneData( createModel() );
viewer.setSceneData( createModel(arguments) );
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
return viewer.run();
}

4
include/osgShadow/ShadowMap
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@ -11,8 +11,8 @@
* OpenSceneGraph Public License for more details.
*/
#ifndef OSGSHADOW_SHADOWEDTEXTURE
#define OSGSHADOW_SHADOWEDTEXTURE 1
#ifndef OSGSHADOW_SHADOWEMAP
#define OSGSHADOW_SHADOWEMAP 1
#include <osg/Camera>

4
include/osgShadow/ShadowTexture
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@ -11,8 +11,8 @@
* OpenSceneGraph Public License for more details.
*/
#ifndef OSGSHADOW_SHADOWEDTEXTURE
#define OSGSHADOW_SHADOWEDTEXTURE 1
#ifndef OSGSHADOW_SHADOWETEXTURE
#define OSGSHADOW_SHADOWETEXTURE 1
#include <osg/Camera>

2
src/osgDB/Registry.cpp
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@ -155,6 +155,8 @@ Registry::Registry()
#endif
}
addFileExtensionAlias("shadow", "osgShadow");
addFileExtensionAlias("sgi", "rgb");
addFileExtensionAlias("rgba", "rgb");
addFileExtensionAlias("int", "rgb");

3
src/osgPlugins/osgShadow/GNUmakefile
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@ -7,7 +7,8 @@ CXXFILES =\
ShadowTechnique.cpp\
ShadowTexture.cpp\
ShadowVolume.cpp\
ShadowedScene.cpp
ShadowedScene.cpp\
ReaderWriterOsgShadow.cpp
LIBS += -losgShadow -losgUtil -losg $(OTHER_LIBS)

144
src/osgPlugins/osgShadow/ReaderWriterOsgShadow.cpp Normal file
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@ -0,0 +1,144 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2007 Robert Osfield
*
* This application is open source and may be redistributed and/or modified
* freely and without restriction, both in commericial and non commericial
* applications, as long as this copyright notice is maintained.
*
* This application 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.
*
*/
#include <osgShadow/ShadowedScene>
#include <osgShadow/ShadowVolume>
#include <osgShadow/ShadowTexture>
#include <osgShadow/ShadowMap>
#include <osgShadow/ParallelSplitShadowMap>
#include <osgDB/ReaderWriter>
#include <osgDB/FileNameUtils>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <stdio.h>
#define EXTENSION_NAME "osgShadow"
static bool getFilenameAndParams(const std::string& input, std::string& filename, std::string& params)
{
// find the start of the params list, accounting for nesting of [] and () brackets,
// note, we are working backwards.
int noNestedBrackets = 0;
std::string::size_type pos = input.size();
for(; pos>0; )
{
--pos;
char c = input[pos];
if (c==']') ++noNestedBrackets;
else if (c=='[') --noNestedBrackets;
else if (c==')') ++noNestedBrackets;
else if (c=='(') --noNestedBrackets;
else if (c=='.' && noNestedBrackets==0) break;
}
// get the next "extension", which actually contains the pseudo-loader parameters
params = input.substr(pos+1, std::string::npos );
if( params.empty() )
{
osg::notify(osg::WARN) << "Missing parameters for " EXTENSION_NAME " pseudo-loader" << std::endl;
return false;
}
// clear the params sting of any brackets.
std::string::size_type params_pos = params.size();
for(; params_pos>0; )
{
--params_pos;
char c = params[params_pos];
if (c==']' || c=='[' || c==')' || c=='(')
{
params.erase(params_pos,1);
}
}
// strip the "params extension", which must leave a sub-filename.
filename = input.substr(0, pos );
return true;
}
///////////////////////////////////////////////////////////////////////////
class ReaderWriterShadow : public osgDB::ReaderWriter
{
public:
ReaderWriterOsgShadow() { }
virtual const char* className() const { return "osgShadow pseudo-loader"; }
virtual bool acceptsExtension(const std::string& extension) const
{
return osgDB::equalCaseInsensitive( extension, "osgShadow" ) || osgDB::equalCaseInsensitive( extension, "shadow" ) ;
}
virtual ReadResult readNode(const std::string& fileName, const osgDB::ReaderWriter::Options* options) const
{
std::string ext = osgDB::getLowerCaseFileExtension(fileName);
if( !acceptsExtension(ext) )
return ReadResult::FILE_NOT_HANDLED;
// strip the pseudo-loader extension
std::string tmpName = osgDB::getNameLessExtension( fileName );
if (tmpName.empty())
return ReadResult::FILE_NOT_HANDLED;
std::string subFileName, params;
if (!getFilenameAndParams(tmpName, subFileName, params))
{
return ReadResult::FILE_NOT_HANDLED;
}
if( subFileName.empty())
{
osg::notify(osg::WARN) << "Missing subfilename for " EXTENSION_NAME " pseudo-loader" << std::endl;
return ReadResult::FILE_NOT_HANDLED;
}
osg::notify(osg::INFO) << " params = \"" << params << "\"" << std::endl;
osg::notify(osg::INFO) << " subFileName = \"" << subFileName << "\"" << std::endl;
osg::ref_ptr<osgShadow::ShadowTechnique> technique;
if (!params.empty())
{
if (params=="ShadowVolume" || params=="sv") technique = new osgShadow::ShadowVolume;
else if (params=="ShadowTexture" || params=="st") technique = new osgShadow::ShadowTexture;
else if (params=="ShadowMap" || params=="sm") technique = new osgShadow::ShadowMap;
else if (params=="ParallelSplitShadowMap" || params=="pssm") technique = new osgShadow::ParallelSplitShadowMap;
else subFileName += std::string(".") + params;
}
// default fallback to using ShadowVolume
if (!technique) technique = new osgShadow::ShadowVolume;
// recursively load the subfile.
osg::Node *node = osgDB::readNodeFile( subFileName, options );
if( !node )
{
// propagate the read failure upwards
osg::notify(osg::WARN) << "Subfile \"" << subFileName << "\" could not be loaded" << std::endl;
return ReadResult::FILE_NOT_HANDLED;
}
osgShadow::ShadowedScene* shadowedScene = new osgShadow::ShadowedScene;
shadowedScene->setShadowTechnique(technique.get());
shadowedScene->addChild( node );
return shadowedScene;
}
};
// Add ourself to the Registry to instantiate the reader/writer.
osgDB::RegisterReaderWriterProxy<ReaderWriterOsgShadow> g_readerWriter_OsgShadow_Proxy;