FGFS-4.1/OpenSceneGraph
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From Adrian Egli, "update the PSSM, i did some bug fixes and added new features to move the camera virtual against the view direction by applaying a simple distance factor (a), which is calculated camera eye - camera center distance. and we can move the "light camera" against the light direction (b).

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(a) some objects behind the camera can cast shadow
(b) object aboive the camera can cast shadow

then i fixed the shadow map orientation, now screen x coordinate alinged which improve the quality"
This commit is contained in:
Robert Osfield
2007-09-27 12:47:34 +00:00
parent 63789c81b9
commit 6df0110d0c
3 changed files with 96 additions and 66 deletions
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63
examples/osgshadow/osgshadow.cpp
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@@ -501,6 +501,7 @@ int main(int argc, char** argv)
arguments.getApplicationUsage()->addCommandLineOption("--debug-color", "ParallelSplitShadowMap display debugging color (only the first 3 maps are color r=0,g=1,b=2.");//ADEGLI
arguments.getApplicationUsage()->addCommandLineOption("--minNearSplit", "ParallelSplitShadowMap shadow map near offset.");//ADEGLI
arguments.getApplicationUsage()->addCommandLineOption("--maxFarDist", "ParallelSplitShadowMap max far distance to shadow.");//ADEGLI
arguments.getApplicationUsage()->addCommandLineOption("--moveVCamFactor", "ParallelSplitShadowMap move the virtual frustum behind the real camera, (also back ground object can cast shadow).");//ADEGLI
arguments.getApplicationUsage()->addCommandLineOption("--NVidea", "ParallelSplitShadowMap set default PolygonOffset for NVidea.");//ADEGLI
arguments.getApplicationUsage()->addCommandLineOption("--PolyOffset-Factor", "ParallelSplitShadowMap set PolygonOffset factor.");//ADEGLI
arguments.getApplicationUsage()->addCommandLineOption("--PolyOffset-Unit", "ParallelSplitShadowMap set PolygonOffset unit.");//ADEGLI
@@ -576,31 +577,6 @@ int main(int argc, char** argv)
// add stats
viewer.addEventHandler( new osgViewer::StatsHandler() );
osg::ref_ptr<osg::Node> model = osgDB::readNodeFiles(arguments);
if (model.valid())
{
model->setNodeMask(CastsShadowTraversalMask | ReceivesShadowTraversalMask);
}
else
{
model = createTestModel(arguments);
}
// get the bounds of the model.
osg::ComputeBoundsVisitor cbbv;
model->accept(cbbv);
osg::BoundingBox bb = cbbv.getBoundingBox();
osg::Vec4 lightpos;
if (postionalLight)
{
lightpos.set(bb.center().x(), bb.center().y(), bb.zMax() + bb.radius() ,1.0f);
}
else
{
lightpos.set(0.5f,0.25f,0.8f,0.0f);
}
osg::ref_ptr<osgShadow::ShadowedScene> shadowedScene = new osgShadow::ShadowedScene;
@@ -653,6 +629,14 @@ int main(int argc, char** argv)
std::cout << "ParallelSplitShadowMap : setMaxFarDistance(" << maxfardist<<")" << std::endl;
}
int moveVCamFactor = 0;
while (arguments.read("--moveVCamFactor", moveVCamFactor))
if ( maxfardist > 0 ) {
pssm->setMoveVCamBehindRCamFactor(moveVCamFactor);
std::cout << "ParallelSplitShadowMap : setMoveVCamBehindRCamFactor(" << moveVCamFactor<<")" << std::endl;
}
double polyoffsetfactor = -0.02;
double polyoffsetunit = 1.0;
while (arguments.read("--PolyOffset-Factor", polyoffsetfactor));
@@ -680,6 +664,33 @@ int main(int argc, char** argv)
osg::ref_ptr<osgShadow::ShadowMap> sm = new osgShadow::ShadowMap;
shadowedScene->setShadowTechnique(sm.get());
}
osg::ref_ptr<osg::Node> model = osgDB::readNodeFiles(arguments);
if (model.valid())
{
model->setNodeMask(CastsShadowTraversalMask | ReceivesShadowTraversalMask);
}
else
{
model = createTestModel(arguments);
}
// get the bounds of the model.
osg::ComputeBoundsVisitor cbbv;
model->accept(cbbv);
osg::BoundingBox bb = cbbv.getBoundingBox();
osg::Vec4 lightpos;
if (postionalLight)
{
lightpos.set(bb.center().x(), bb.center().y(), bb.zMax() + bb.radius() ,1.0f);
}
else
{
lightpos.set(0.5f,0.25f,0.8f,0.0f);
}
if ( arguments.read("--base"))
{
@@ -712,7 +723,7 @@ int main(int argc, char** argv)
ls->getLight()->setAmbient(osg::Vec4(0.2,0.2,0.2,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.8,0.8,0.8,1.0));
}
shadowedScene->addChild(model.get());
shadowedScene->addChild(ls.get());