bool ShadowVolume::getLightPositionalState( osgUtil::CullVisitor& cv,
const Light* light, Vec4& lightPos, Vec3& lightDir )
{
if( !light )
return false;
// get positional state
osgUtil::RenderStage* rs = cv.getRenderStage();
osgUtil::PositionalStateContainer::AttrMatrixList& aml =
rs->getPositionalStateContainer()->getAttrMatrixList();
RefMatrix* matrix = NULL;
bool found = false;
// find the light and its matrix
// note: it finds the last light occurence with its associated matrix
for( osgUtil::PositionalStateContainer::AttrMatrixList::iterator itr = aml.begin();
itr != aml.end();
++itr )
{
const Light* l = dynamic_cast< const Light* >( itr->first.get() );
if( l && l == light )
{
found = true;
matrix = itr->second.get();
}
}
if( !found )
return false;
// transform light to world space
Matrix localToWorld = Matrix::inverse( *cv.getModelViewMatrix() );
if( matrix ) localToWorld.preMult( *matrix );
lightPos = light->getPosition();
if( lightPos[3] == 0 )
lightDir.set( -lightPos[0], -lightPos[1], -lightPos[2] );
else
lightDir = light->getDirection();
lightPos = lightPos * localToWorld;
lightDir = Matrix::transform3x3( lightDir, localToWorld );
lightDir.normalize();
return true;
}
void ParallelSplitShadowMap::cull(osgUtil::CullVisitor& cv){
// record the traversal mask on entry so we can reapply it later.
unsigned int traversalMask = cv.getTraversalMask();
osgUtil::RenderStage* orig_rs = cv.getRenderStage();
#ifdef SHADOW_TEXTURE_GLSL
PSSMShadowSplitTextureMap::iterator it=_PSSMShadowSplitTextureMap.begin();
#else
// do traversal of shadow receiving scene which does need to be decorated by the shadow map
for (PSSMShadowSplitTextureMap::iterator it=_PSSMShadowSplitTextureMap.begin();it!=_PSSMShadowSplitTextureMap.end();it++)
#endif
{
PSSMShadowSplitTexture pssmShadowSplitTexture = it->second;
cv.pushStateSet(pssmShadowSplitTexture._stateset.get());
//////////////////////////////////////////////////////////////////////////
// DEBUG
if ( _displayTexturesGroupingNode ) {
cv.pushStateSet(pssmShadowSplitTexture._debug_stateset.get());
}
//////////////////////////////////////////////////////////////////////////
_shadowedScene->osg::Group::traverse(cv);
cv.popStateSet();
}
// need to compute view frustum for RTT camera.
// get the bounds of the model.
osg::ComputeBoundsVisitor cbbv(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
cbbv.setTraversalMask(getShadowedScene()->getCastsShadowTraversalMask());
_shadowedScene->osg::Group::traverse(cbbv);
//////////////////////////////////////////////////////////////////////////
const osg::Light* selectLight = 0;
/// light pos and light direction
osg::Vec4 lightpos;
osg::Vec3 lightDirection;
if ( ! _userLight ) {
// try to find a light in the scene
osgUtil::PositionalStateContainer::AttrMatrixList& aml = orig_rs->getPositionalStateContainer()->getAttrMatrixList();
for(osgUtil::PositionalStateContainer::AttrMatrixList::iterator itr = aml.begin();
itr != aml.end();
++itr)
{
const osg::Light* light = dynamic_cast<const osg::Light*>(itr->first.get());
if (light)
{
osg::RefMatrix* matrix = itr->second.get();
if (matrix) lightpos = light->getPosition() * (*matrix);
else lightpos = light->getPosition();
if (matrix) lightDirection = light->getDirection() * (*matrix);
else lightDirection = light->getDirection();
selectLight = light;
}
}
osg::Matrix eyeToWorld;
eyeToWorld.invert(*cv.getModelViewMatrix());
lightpos = lightpos * eyeToWorld;
lightDirection = lightDirection * eyeToWorld;
}else{
// take the user light as light source
lightpos = _userLight->getPosition();
lightDirection = _userLight->getDirection();
selectLight = _userLight.get();
}
if (selectLight)
{
// do traversal of shadow receiving scene which does need to be decorated by the shadow map
//unsigned int iMaxSplit = _PSSMShadowSplitTextureMap.size();
for (PSSMShadowSplitTextureMap::iterator it=_PSSMShadowSplitTextureMap.begin();it!=_PSSMShadowSplitTextureMap.end();it++)
{
PSSMShadowSplitTexture pssmShadowSplitTexture = it->second;
//////////////////////////////////////////////////////////////////////////
// SETUP pssmShadowSplitTexture for rendering
//
lightDirection.normalize();
pssmShadowSplitTexture._lightDirection = lightDirection;
pssmShadowSplitTexture._cameraView = cv.getRenderInfo().getView()->getCamera()->getViewMatrix();
pssmShadowSplitTexture._cameraProj = cv.getRenderInfo().getView()->getCamera()->getProjectionMatrix();
//////////////////////////////////////////////////////////////////////////
// CALCULATE
// Calculate corner points of frustum split
//
// To avoid edge problems, scale the frustum so
// that it's at least a few pixels larger
//
osg::Vec3d pCorners[8];
calculateFrustumCorners(pssmShadowSplitTexture,pCorners);
// Init Light (Directional Light)
//
calculateLightInitialPosition(pssmShadowSplitTexture,pCorners);
// Calculate near and far for light view
//
calculateLightNearFarFormFrustum(pssmShadowSplitTexture,pCorners);
// Calculate view and projection matrices
//
calculateLightViewProjectionFormFrustum(pssmShadowSplitTexture,pCorners);
//////////////////////////////////////////////////////////////////////////
// set up shadow rendering camera
pssmShadowSplitTexture._camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
//////////////////////////////////////////////////////////////////////////
// DEBUG
if ( _displayTexturesGroupingNode ) {
pssmShadowSplitTexture._debug_camera->setViewMatrix(pssmShadowSplitTexture._camera->getViewMatrix());
pssmShadowSplitTexture._debug_camera->setProjectionMatrix(pssmShadowSplitTexture._camera->getProjectionMatrix());
pssmShadowSplitTexture._debug_camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
}
//////////////////////////////////////////////////////////////////////////
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
osg::Matrix MVPT = pssmShadowSplitTexture._camera->getViewMatrix() *
pssmShadowSplitTexture._camera->getProjectionMatrix() *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5,0.5,0.5);
pssmShadowSplitTexture._texgen->setMode(osg::TexGen::EYE_LINEAR);
pssmShadowSplitTexture._texgen->setPlanesFromMatrix(MVPT);
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
cv.setTraversalMask( traversalMask & getShadowedScene()->getCastsShadowTraversalMask() );
// do RTT camera traversal
pssmShadowSplitTexture._camera->accept(cv);
//////////////////////////////////////////////////////////////////////////
// DEBUG
if ( _displayTexturesGroupingNode ) {
pssmShadowSplitTexture._debug_camera->accept(cv);
}
orig_rs->getPositionalStateContainer()->addPositionedTextureAttribute(pssmShadowSplitTexture._textureUnit, cv.getModelViewMatrix(), pssmShadowSplitTexture._texgen.get());
}
} // if light
// reapply the original traversal mask
cv.setTraversalMask( traversalMask );
}
void ShadowMap::cull(osgUtil::CullVisitor& cv)
{
// record the traversal mask on entry so we can reapply it later.
unsigned int traversalMask = cv.getTraversalMask();
osgUtil::RenderStage* orig_rs = cv.getRenderStage();
// do traversal of shadow receiving scene which does need to be decorated by the shadow map
{
cv.pushStateSet(_stateset.get());
_shadowedScene->osg::Group::traverse(cv);
cv.popStateSet();
}
// need to compute view frustum for RTT camera.
// 1) get the light position
// 2) get the center and extents of the view frustum
const osg::Light* selectLight = 0;
osg::Vec4 lightpos;
osg::Vec3 lightDir;
//MR testing giving a specific light
osgUtil::PositionalStateContainer::AttrMatrixList& aml = orig_rs->getPositionalStateContainer()->getAttrMatrixList();
for(osgUtil::PositionalStateContainer::AttrMatrixList::iterator itr = aml.begin();
itr != aml.end();
++itr)
{
const osg::Light* light = dynamic_cast<const osg::Light*>(itr->first.get());
if (light)
{
if( _light.valid()) {
if( _light.get() == light )
selectLight = light;
else
continue;
}
else
selectLight = light;
osg::RefMatrix* matrix = itr->second.get();
if (matrix)
{
lightpos = light->getPosition() * (*matrix);
lightDir = osg::Matrix::transform3x3( light->getDirection(), *matrix );
}
else
{
lightpos = light->getPosition();
lightDir = light->getDirection();
}
}
}
osg::Matrix eyeToWorld;
eyeToWorld.invert(*cv.getModelViewMatrix());
lightpos = lightpos * eyeToWorld;
lightDir = osg::Matrix::transform3x3( lightDir, eyeToWorld );
lightDir.normalize();
if (selectLight)
{
// set to ambient on light to black so that the ambient bias uniform can take it's affect
const_cast<osg::Light*>(selectLight)->setAmbient(osg::Vec4(0.0f,0.0f,0.0f,1.0f));
//std::cout<<"----- VxOSG::ShadowMap selectLight spot cutoff "<<selectLight->getSpotCutoff()<<std::endl;
float fov = selectLight->getSpotCutoff() * 2;
if(fov < 180.0f) // spotlight, then we don't need the bounding box
{
osg::Vec3 position(lightpos.x(), lightpos.y(), lightpos.z());
_camera->setProjectionMatrixAsPerspective(fov, 1.0, 0.1, 1000.0);
_camera->setViewMatrixAsLookAt(position,position+lightDir,computeOrthogonalVector(lightDir));
}
else
{
// get the bounds of the model.
osg::ComputeBoundsVisitor cbbv(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
cbbv.setTraversalMask(getShadowedScene()->getCastsShadowTraversalMask());
_shadowedScene->osg::Group::traverse(cbbv);
osg::BoundingBox bb = cbbv.getBoundingBox();
if (lightpos[3]!=0.0) // point light
{
osg::Vec3 position(lightpos.x(), lightpos.y(), lightpos.z());
float centerDistance = (position-bb.center()).length();
float znear = centerDistance-bb.radius();
float zfar = centerDistance+bb.radius();
float zNearRatio = 0.001f;
if (znear<zfar*zNearRatio) znear = zfar*zNearRatio;
float top = (bb.radius()/centerDistance)*znear;
float right = top;
_camera->setProjectionMatrixAsFrustum(-right,right,-top,top,znear,zfar);
_camera->setViewMatrixAsLookAt(position,bb.center(),computeOrthogonalVector(bb.center()-position));
}
else // directional light
{
// make an orthographic projection
osg::Vec3 lightDir(lightpos.x(), lightpos.y(), lightpos.z());
lightDir.normalize();
// set the position far away along the light direction
osg::Vec3 position = bb.center() + lightDir * bb.radius() * 2;
float centerDistance = (position-bb.center()).length();
float znear = centerDistance-bb.radius();
float zfar = centerDistance+bb.radius();
float zNearRatio = 0.001f;
if (znear<zfar*zNearRatio) znear = zfar*zNearRatio;
float top = bb.radius();
float right = top;
_camera->setProjectionMatrixAsOrtho(-right, right, -top, top, znear, zfar);
_camera->setViewMatrixAsLookAt(position,bb.center(),computeOrthogonalVector(lightDir));
}
}
cv.setTraversalMask( traversalMask &
getShadowedScene()->getCastsShadowTraversalMask() );
// do RTT camera traversal
_camera->accept(cv);
_texgen->setMode(osg::TexGen::EYE_LINEAR);
#if IMPROVE_TEXGEN_PRECISION
// compute the matrix which takes a vertex from local coords into tex coords
// We actually use two matrices one used to define texgen
// and second that will be used as modelview when appling to OpenGL
_texgen->setPlanesFromMatrix( _camera->getProjectionMatrix() *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5f,0.5f,0.5f) );
// Place texgen with modelview which removes big offsets (making it float friendly)
osg::RefMatrix * refMatrix = new osg::RefMatrix
( _camera->getInverseViewMatrix() * *cv.getModelViewMatrix() );
cv.getRenderStage()->getPositionalStateContainer()->
addPositionedTextureAttribute( _shadowTextureUnit, refMatrix, _texgen.get() );
#else
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
osg::Matrix MVPT = _camera->getViewMatrix() *
_camera->getProjectionMatrix() *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5f,0.5f,0.5f);
_texgen->setPlanesFromMatrix(MVPT);
orig_rs->getPositionalStateContainer()->addPositionedTextureAttribute(_shadowTextureUnit, cv.getModelViewMatrix(), _texgen.get());
#endif
} // if(selectLight)
// reapply the original traversal mask
cv.setTraversalMask( traversalMask );
}
void SoftShadowMap::cull(osgUtil::CullVisitor& cv)
{
// record the traversal mask on entry so we can reapply it later.
unsigned int traversalMask = cv.getTraversalMask();
osgUtil::RenderStage* orig_rs = cv.getRenderStage();
// do traversal of shadow receiving scene which does need to be decorated by the shadow map
{
cv.pushStateSet(_stateset.get());
_shadowedScene->osg::Group::traverse(cv);
cv.popStateSet();
}
// need to compute view frustum for RTT camera.
// 1) get the light position
// 2) get the center and extents of the view frustum
const osg::Light* selectLight = 0;
osg::Vec4 lightpos;
osgUtil::PositionalStateContainer::AttrMatrixList& aml = orig_rs->getPositionalStateContainer()->getAttrMatrixList();
for(osgUtil::PositionalStateContainer::AttrMatrixList::iterator itr = aml.begin();
itr != aml.end();
++itr)
{
const osg::Light* light = dynamic_cast<const osg::Light*>(itr->first.get());
if (light)
{
osg::RefMatrix* matrix = itr->second.get();
if (matrix) lightpos = light->getPosition() * (*matrix);
else lightpos = light->getPosition();
selectLight = light;
}
}
osg::Matrix eyeToWorld;
eyeToWorld.invert(*cv.getModelViewMatrix());
lightpos = lightpos * eyeToWorld;
if (selectLight)
{
// get the bounds of the model.
osg::ComputeBoundsVisitor cbbv(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
cbbv.setTraversalMask(getShadowedScene()->getCastsShadowTraversalMask());
_shadowedScene->osg::Group::traverse(cbbv);
osg::BoundingBox bb = cbbv.getBoundingBox();
osg::Vec3 position;
if (lightpos[3]!=0.0)
{
position.set(lightpos.x(), lightpos.y(), lightpos.z());
}
else
{
// make an orthographic projection
osg::Vec3 lightDir(lightpos.x(), lightpos.y(), lightpos.z());
lightDir.normalize();
// set the position far away along the light direction
position = lightDir * bb.radius() * 20;
}
float centerDistance = (position-bb.center()).length();
float znear = centerDistance-bb.radius();
float zfar = centerDistance+bb.radius();
float zNearRatio = 0.001f;
if (znear<zfar*zNearRatio) znear = zfar*zNearRatio;
float top = bb.radius();
float right = top;
_camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
_camera->setProjectionMatrixAsOrtho(-right, right, -top, top, znear, zfar);
_camera->setViewMatrixAsLookAt(position, bb.center(), osg::Vec3(0.0f,1.0f,0.0f));
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
osg::Matrix MVPT = _camera->getViewMatrix() *
_camera->getProjectionMatrix() *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5,0.5,0.5+_bias);
_texgen->setMode(osg::TexGen::EYE_LINEAR);
_texgen->setPlanesFromMatrix(MVPT);
cv.setTraversalMask( traversalMask &
getShadowedScene()->getCastsShadowTraversalMask() );
// do RTT camera traversal
_camera->accept(cv);
orig_rs->getPositionalStateContainer()->addPositionedTextureAttribute(_textureUnit, cv.getModelViewMatrix(), _texgen.get());
}
// reapply the original traversal mask
cv.setTraversalMask( traversalMask );
}
void ShadowVolume::cull(osgUtil::CullVisitor& cv)
{
osg::ref_ptr<osgUtil::RenderBin> original_bin = cv.getCurrentRenderBin();
osg::ref_ptr<osgUtil::RenderBin> new_bin = original_bin->find_or_insert(0,"RenderBin");
cv.setCurrentRenderBin(new_bin.get());
_shadowedScene->osg::Group::traverse(cv);
cv.setCurrentRenderBin(original_bin.get());
osgUtil::RenderBin::RenderBinList::iterator itr = new_bin->getRenderBinList().find(1000);
osg::ref_ptr<osgUtil::RenderBin> shadowVolumeBin;
if (itr != new_bin->getRenderBinList().end())
{
shadowVolumeBin = itr->second;
if (shadowVolumeBin.valid())
{
//OSG_NOTICE<<"Found shadow volume bin, now removing it"<<std::endl;
new_bin->getRenderBinList().erase(itr);
}
}
if (shadowVolumeBin.valid())
{
original_bin->setStateSet(_ss1.get());
osgUtil::RenderStage* orig_rs = cv.getRenderStage();
osgUtil::RenderStage* new_rs = new osgUtil::RenderStage;
orig_rs->addPostRenderStage(new_rs);
new_rs->setViewport(orig_rs->getViewport());
new_rs->setClearColor(orig_rs->getClearColor());
new_rs->setClearMask(GL_STENCIL_BUFFER_BIT);
new_rs->setDrawBuffer(orig_rs->getDrawBuffer(), orig_rs->getDrawBufferApplyMask());
new_rs->setReadBuffer(orig_rs->getReadBuffer(), orig_rs->getReadBufferApplyMask());
new_rs->setColorMask(orig_rs->getColorMask());
osg::Vec4 lightpos;
osg::ref_ptr<osgUtil::PositionalStateContainer> ps = new osgUtil::PositionalStateContainer;
new_rs->setPositionalStateContainer(ps.get());
const osg::Light* selectLight = 0;
osgUtil::PositionalStateContainer::AttrMatrixList& aml = orig_rs->getPositionalStateContainer()->getAttrMatrixList();
for(osgUtil::PositionalStateContainer::AttrMatrixList::iterator itr = aml.begin();
itr != aml.end();
++itr)
{
const osg::Light* light = dynamic_cast<const osg::Light*>(itr->first.get());
if (light)
{
osg::RefMatrix* matrix = itr->second.get();
if (matrix) lightpos = light->getPosition() * (*matrix);
else lightpos = light->getPosition();
selectLight = light;
}
else
{
ps->addPositionedAttribute(itr->second.get(), itr->first.get());
}
}
_ambientLight->setPosition(lightpos);
orig_rs->addPositionedAttribute(0,_ambientLight.get());
_diffuseLight->setPosition(lightpos);
if (selectLight)
{
_ambientLight->setAmbient(selectLight->getAmbient());
_diffuseLight->setDiffuse(selectLight->getDiffuse());
_diffuseLight->setSpecular(selectLight->getSpecular());
_diffuseLight->setDirection(selectLight->getDirection());
_diffuseLight->setConstantAttenuation(selectLight->getConstantAttenuation());
_diffuseLight->setLinearAttenuation(selectLight->getLinearAttenuation());
_diffuseLight->setQuadraticAttenuation(selectLight->getQuadraticAttenuation());
_diffuseLight->setSpotExponent(selectLight->getSpotExponent());
_diffuseLight->setSpotCutoff(selectLight->getSpotCutoff());
}
ps->addPositionedAttribute(0, _diffuseLight.get());
if (_lightpos != lightpos && _dynamicShadowVolumes)
{
_lightpos = lightpos;
osg::Matrix eyeToWorld;
eyeToWorld.invert(*cv.getModelViewMatrix());
_occluder->computeShadowVolumeGeometry(lightpos * eyeToWorld, *_shadowVolume);
}
if (shadowVolumeBin.valid())
{
// new_rs->setStateSet(_mainShadowStateSet.get());
new_rs->getRenderBinList()[0] = shadowVolumeBin;
shadowVolumeBin->setStateSet(_shadowVolumeStateSet.get());
osg::ref_ptr<osgUtil::RenderBin> nested_bin = new_rs->find_or_insert(1,"RenderBin");
nested_bin->getRenderBinList()[0] = new_bin;
nested_bin->setStateSet(_shadowedSceneStateSet.get());
}
}
}