void RayTracedTechnique::traverse(osg::NodeVisitor& nv)
{
// OSG_NOTICE<<"RayTracedTechnique::traverse(osg::NodeVisitor& nv)"<<std::endl;
if (!_volumeTile) return;
// if app traversal update the frame count.
if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR)
{
if (_volumeTile->getDirty()) _volumeTile->init();
osgUtil::UpdateVisitor* uv = nv.asUpdateVisitor();
if (uv)
{
update(uv);
return;
}
}
else if (nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR)
{
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv)
{
cull(cv);
return;
}
}
if (_volumeTile->getDirty())
{
OSG_INFO<<"******* Doing init ***********"<<std::endl;
_volumeTile->init();
}
}
void Technique::traverse_implementation(osg::NodeVisitor& nv, Effect* fx)
{
// define passes if necessary
if (_passes.empty()) {
define_passes();
}
// special actions must be taken if the node visitor is actually a CullVisitor
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv)
{
// traverse all passes
for (int i=0; i<getNumPasses(); ++i)
{
// push the i-th pass' StateSet
cv->pushStateSet(_passes[i].get());
// traverse the override node if defined, otherwise
// traverse children as a Group would do
osg::Node *override = getOverrideChild(i);
if (override) {
override->accept(nv);
} else {
fx->inherited_traverse(nv);
}
// pop the StateSet
cv->popStateSet();
}
void TXPNode::traverse(osg::NodeVisitor& nv)
{
switch(nv.getVisitorType())
{
case osg::NodeVisitor::CULL_VISITOR:
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv)
{
//#define PRINT_TILEMAPP_TIMEINFO
#ifdef PRINT_TILEMAPP_TIMEINFO
const osg::Timer& timer = *osg::Timer::instance();
osg::Timer_t start = timer.tick();
std::cout<<"Doing visible tile search"<<std::endl;
#endif // PRINT_TILEMAPP_TIMEINFO
osg::ref_ptr<TileMapper> tileMapper = new TileMapper;
tileMapper->setLODScale(cv->getLODScale());
tileMapper->pushReferenceViewPoint(cv->getReferenceViewPoint());
tileMapper->pushViewport(cv->getViewport());
tileMapper->pushProjectionMatrix((cv->getProjectionMatrix()));
tileMapper->pushModelViewMatrix((cv->getModelViewMatrix()), osg::Transform::RELATIVE_RF);
// traverse the scene graph to search for valid tiles
accept(*tileMapper);
tileMapper->popModelViewMatrix();
tileMapper->popProjectionMatrix();
tileMapper->popViewport();
tileMapper->popReferenceViewPoint();
//std::cout<<" found " << tileMapper._tileMap.size() << std::endl;
cv->setUserData(tileMapper.get());
#ifdef PRINT_TILEMAPP_TIMEINFO
std::cout<<"Completed visible tile search in "<<timer.delta_m(start,timer.tick())<<std::endl;
#endif // PRINT_TILEMAPP_TIMEINFO
}
updateEye(nv);
break;
}
case osg::NodeVisitor::UPDATE_VISITOR:
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
updateSceneGraph();
break;
}
default:
break;
}
Group::traverse(nv);
}
void osgParticle::ParticleSystemUpdater::traverse(osg::NodeVisitor& nv)
{
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv)
{
if (nv.getFrameStamp())
{
if( _frameNumber < nv.getFrameStamp()->getFrameNumber())
{
_frameNumber = nv.getFrameStamp()->getFrameNumber();
double t = nv.getFrameStamp()->getSimulationTime();
if (_t0 != -1.0)
{
ParticleSystem_Vector::iterator i;
for (i=_psv.begin(); i!=_psv.end(); ++i)
{
ParticleSystem* ps = i->get();
ParticleSystem::ScopedWriteLock lock(*(ps->getReadWriteMutex()));
// We need to allow at least 2 frames difference, because the particle system's lastFrameNumber
// is updated in the draw thread which may not have completed yet.
if (!ps->isFrozen() &&
(!ps->getFreezeOnCull() || ((nv.getFrameStamp()->getFrameNumber()-ps->getLastFrameNumber()) <= 2)) )
{
ps->update(t - _t0, nv);
}
}
}
_t0 = t;
}
}
else
{
OSG_WARN << "osgParticle::ParticleSystemUpdater::traverse(NodeVisitor&) requires a valid FrameStamp to function, particles not updated.\n";
}
}
Node::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)
{
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv) cull(*cv);
else _shadowedScene->osg::Group::traverse(nv);
}
else
{
_shadowedScene->osg::Group::traverse(nv);
}
}
void osgParticle::ParticleSystemUpdater::traverse(osg::NodeVisitor& nv)
{
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv)
{
if (nv.getFrameStamp())
{
if( _frameNumber < nv.getFrameStamp()->getFrameNumber())
{
_frameNumber = nv.getFrameStamp()->getFrameNumber();
double t = nv.getFrameStamp()->getSimulationTime();
if (_t0 != -1.0)
{
ParticleSystem_Vector::iterator i;
for (i=_psv.begin(); i!=_psv.end(); ++i)
{
ParticleSystem* ps = i->get();
ParticleSystem::ScopedWriteLock lock(*(ps->getReadWriteMutex()));
if (!ps->isFrozen() && (ps->getLastFrameNumber() >= (nv.getFrameStamp()->getFrameNumber() - 1) || !ps->getFreezeOnCull()))
{
ps->update(t - _t0, nv);
}
}
}
_t0 = t;
}
}
else
{
OSG_WARN << "osgParticle::ParticleSystemUpdater::traverse(NodeVisitor&) requires a valid FrameStamp to function, particles not updated.\n";
}
}
Node::traverse(nv);
}
void osgParticle::ParticleProcessor::traverse(osg::NodeVisitor& nv)
{
// typecast the NodeVisitor to CullVisitor
osgUtil::CullVisitor* cv = nv.asCullVisitor();
// continue only if the visitor actually is a cull visitor
if (cv) {
// continue only if the particle system is valid
if (_ps.valid())
{
if (nv.getFrameStamp())
{
ParticleSystem::ScopedWriteLock lock(*(_ps->getReadWriteMutex()));
//added- 1/17/06- [email protected]
//a check to make sure we havent updated yet this frame
if(_frameNumber < nv.getFrameStamp()->getFrameNumber())
{
// retrieve the current time
double t = nv.getFrameStamp()->getSimulationTime();
// reset this processor if we've reached the reset point
if ((_currentTime >= _resetTime) && (_resetTime > 0))
{
_currentTime = 0;
_t0 = -1;
}
// skip if we haven't initialized _t0 yet
if (_t0 != -1)
{
// check whether the processor is alive
bool alive = false;
if (_currentTime >= _startTime)
{
if (_endless || (_currentTime < (_startTime + _lifeTime)))
alive = true;
}
// update current time
_currentTime += t - _t0;
// process only if the particle system is not frozen/culled
// We need to allow at least 2 frames difference, because the particle system's lastFrameNumber
// is updated in the draw thread which may not have completed yet.
if (alive &&
_enabled &&
!_ps->isFrozen() &&
(!_ps->getFreezeOnCull() || ((nv.getFrameStamp()->getFrameNumber()-_ps->getLastFrameNumber()) <= 2)) )
{
// initialize matrix flags
_need_ltw_matrix = true;
_need_wtl_matrix = true;
_current_nodevisitor = &nv;
// do some process (unimplemented in this base class)
process( t - _t0 );
} else {
//The values of _previous_wtl_matrix and _previous_ltw_matrix will be invalid
//since processing was skipped for this frame
_first_ltw_compute = true;
_first_wtl_compute = true;
}
}
_t0 = t;
}
//added- 1/17/06- [email protected]
//updates the _frameNumber, keeping it current
_frameNumber = nv.getFrameStamp()->getFrameNumber();
}
else
{
OSG_WARN << "osgParticle::ParticleProcessor::traverse(NodeVisitor&) requires a valid FrameStamp to function, particles not updated.\n";
}
} else
{
OSG_WARN << "ParticleProcessor \"" << getName() << "\": invalid particle system\n";
}
}
// call the inherited method
Node::traverse(nv);
}
void VolumeScene::traverse(osg::NodeVisitor& nv)
{
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (!cv)
{
Group::traverse(nv);
return;
}
osg::ref_ptr<ViewData> viewData;
bool initializeViewData = false;
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_viewDataMapMutex);
if (!_viewDataMap[cv])
{
_viewDataMap[cv] = new ViewData;
initializeViewData = true;
}
viewData = _viewDataMap[cv];
}
if (initializeViewData)
{
OSG_NOTICE<<"Creating ViewData"<<std::endl;
int textureWidth = 512;
int textureHeight = 512;
osg::Viewport* viewport = cv->getCurrentRenderStage()->getViewport();
if (viewport)
{
textureWidth = static_cast<int>(viewport->width());
textureHeight = static_cast<int>(viewport->height());
}
// set up depth texture
viewData->_depthTexture = new osg::Texture2D;
viewData->_depthTexture->setTextureSize(textureWidth, textureHeight);
viewData->_depthTexture->setInternalFormat(GL_DEPTH_COMPONENT);
viewData->_depthTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
viewData->_depthTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
viewData->_depthTexture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
viewData->_depthTexture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
viewData->_depthTexture->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
// set up color texture
viewData->_colorTexture = new osg::Texture2D;
viewData->_colorTexture->setTextureSize(textureWidth, textureHeight);
viewData->_colorTexture->setInternalFormat(GL_RGBA);
viewData->_colorTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
viewData->_colorTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
viewData->_colorTexture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_EDGE);
viewData->_colorTexture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_EDGE);
// set up the RTT Camera to capture the main scene to a color and depth texture that can be used in post processing
viewData->_rttCamera = new osg::Camera;
viewData->_rttCamera->setName("viewData->_rttCamera");
viewData->_rttCamera->attach(osg::Camera::DEPTH_BUFFER, viewData->_depthTexture.get());
viewData->_rttCamera->attach(osg::Camera::COLOR_BUFFER, viewData->_colorTexture.get());
viewData->_rttCamera->setCullCallback(new RTTCameraCullCallback(this));
viewData->_rttCamera->setViewport(0,0,textureWidth,textureHeight);
// clear the depth and colour bufferson each clear.
viewData->_rttCamera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
// set the camera to render before the main camera.
viewData->_rttCamera->setRenderOrder(osg::Camera::PRE_RENDER);
// tell the camera to use OpenGL frame buffer object where supported.
viewData->_rttCamera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
viewData->_rttCamera->setReferenceFrame(osg::Transform::RELATIVE_RF);
viewData->_rttCamera->setProjectionMatrix(osg::Matrixd::identity());
viewData->_rttCamera->setViewMatrix(osg::Matrixd::identity());
// create mesh for rendering the RTT textures onto the screen
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
geode->setCullingActive(false);
viewData->_backdropSubgraph = geode;
//geode->addDrawable(osg::createTexturedQuadGeometry(osg::Vec3(-1.0f,-1.0f,-1.0f),osg::Vec3(2.0f,0.0f,-1.0f),osg::Vec3(0.0f,2.0f,-1.0f)));
viewData->_geometry = new osg::Geometry;
geode->addDrawable(viewData->_geometry.get());
viewData->_geometry->setUseDisplayList(false);
viewData->_geometry->setUseVertexBufferObjects(false);
viewData->_vertices = new osg::Vec3Array(4);
viewData->_geometry->setVertexArray(viewData->_vertices.get());
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array(1);
(*colors)[0].set(1.0f,1.0f,1.0f,1.0f);
viewData->_geometry->setColorArray(colors.get(), osg::Array::BIND_OVERALL);
osg::ref_ptr<osg::Vec2Array> texcoords = new osg::Vec2Array(4);
(*texcoords)[0].set(0.0f,1.0f);
(*texcoords)[1].set(0.0f,0.0f);
(*texcoords)[2].set(1.0f,1.0f);
(*texcoords)[3].set(1.0f,0.0f);
viewData->_geometry->setTexCoordArray(0, texcoords.get(), osg::Array::BIND_PER_VERTEX);
viewData->_geometry->addPrimitiveSet(new osg::DrawArrays(GL_TRIANGLE_STRIP,0,4));
osg::ref_ptr<osg::StateSet> stateset = viewData->_geometry->getOrCreateStateSet();
stateset->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
stateset->setMode(GL_BLEND, osg::StateAttribute::OFF);
stateset->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
stateset->setAttribute(new osg::Depth(osg::Depth::LEQUAL));
stateset->setRenderBinDetails(10,"DepthSortedBin");
osg::ref_ptr<osg::Program> program = new osg::Program;
stateset->setAttribute(program.get());
// get vertex shaders from source
osg::ref_ptr<osg::Shader> vertexShader = osgDB::readRefShaderFile(osg::Shader::VERTEX, "shaders/volume_color_depth.vert");
if (vertexShader.valid())
{
program->addShader(vertexShader.get());
}
#if 0
else
{
#include "Shaders/volume_color_depth_vert.cpp"
program->addShader(new osg::Shader(osg::Shader::VERTEX, volume_color_depth_vert));
}
#endif
// get fragment shaders from source
osg::ref_ptr<osg::Shader> fragmentShader = osgDB::readRefShaderFile(osg::Shader::FRAGMENT, "shaders/volume_color_depth.frag");
if (fragmentShader.valid())
{
program->addShader(fragmentShader.get());
}
#if 0
else
{
#include "Shaders/volume_color_depth_frag.cpp"
program->addShader(new osg::Shader(osg::Shader::FRAGMENT, volume_color_depth_frag));
}
#endif
viewData->_stateset = new osg::StateSet;
viewData->_stateset->addUniform(new osg::Uniform("colorTexture",0));
viewData->_stateset->addUniform(new osg::Uniform("depthTexture",1));
viewData->_stateset->setTextureAttributeAndModes(0, viewData->_colorTexture.get(), osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
viewData->_stateset->setTextureAttributeAndModes(1, viewData->_depthTexture.get(), osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
viewData->_viewportDimensionsUniform = new osg::Uniform("viewportDimensions",osg::Vec4(0.0,0.0,1280.0,1024.0));
viewData->_stateset->addUniform(viewData->_viewportDimensionsUniform.get());
geode->setStateSet(viewData->_stateset.get());
}
else
{
// OSG_NOTICE<<"Reusing ViewData"<<std::endl;
}
osg::Matrix projectionMatrix = *(cv->getProjectionMatrix());
osg::Matrix modelviewMatrix = *(cv->getModelViewMatrix());
// new frame so need to clear last frames log of VolumeTiles
viewData->clearTiles();
osg::Viewport* viewport = cv->getCurrentRenderStage()->getViewport();
if (viewport)
{
viewData->_viewportDimensionsUniform->set(osg::Vec4(viewport->x(), viewport->y(), viewport->width(),viewport->height()));
int textureWidth = static_cast<int>(viewport->width());
int textureHeight = static_cast<int>(viewport->height());
if (textureWidth != viewData->_colorTexture->getTextureWidth() ||
textureHeight != viewData->_colorTexture->getTextureHeight())
{
OSG_NOTICE<<"Need to change texture size to "<<textureWidth<<", "<< textureHeight<<std::endl;
viewData->_colorTexture->setTextureSize(textureWidth, textureHeight);
viewData->_colorTexture->dirtyTextureObject();
viewData->_depthTexture->setTextureSize(textureWidth, textureHeight);
viewData->_depthTexture->dirtyTextureObject();
viewData->_rttCamera->setViewport(0, 0, textureWidth, textureHeight);
if (viewData->_rttCamera->getRenderingCache())
{
viewData->_rttCamera->getRenderingCache()->releaseGLObjects(0);
}
}
}
cv->setUserValue("VolumeSceneTraversal",std::string("RenderToTexture"));
//OSG_NOTICE<<"Ready to traverse RTT Camera"<<std::endl;
//OSG_NOTICE<<" RTT Camera ProjectionMatrix Before "<<viewData->_rttCamera->getProjectionMatrix()<<std::endl;
viewData->_rttCamera->accept(nv);
//OSG_NOTICE<<" RTT Camera ProjectionMatrix After "<<viewData->_rttCamera->getProjectionMatrix()<<std::endl;
//OSG_NOTICE<<" cv ProjectionMatrix After "<<*(cv->getProjectionMatrix())<<std::endl;
//OSG_NOTICE<<" after RTT near ="<<cv->getCalculatedNearPlane()<<std::endl;
//OSG_NOTICE<<" after RTT far ="<<cv->getCalculatedFarPlane()<<std::endl;
//OSG_NOTICE<<"tileVisited()"<<viewData->_tiles.size()<<std::endl;
typedef osgUtil::CullVisitor::value_type NearFarValueType;
NearFarValueType calculatedNearPlane = std::numeric_limits<NearFarValueType>::max();
NearFarValueType calculatedFarPlane = -std::numeric_limits<NearFarValueType>::max();
if (viewData->_rttCamera->getUserValue("CalculatedNearPlane",calculatedNearPlane) &&
viewData->_rttCamera->getUserValue("CalculatedFarPlane",calculatedFarPlane))
{
calculatedNearPlane *= 0.5;
calculatedFarPlane *= 2.0;
//OSG_NOTICE<<"Got from RTTCamera CalculatedNearPlane="<<calculatedNearPlane<<std::endl;
//OSG_NOTICE<<"Got from RTTCamera CalculatedFarPlane="<<calculatedFarPlane<<std::endl;
if (calculatedNearPlane < cv->getCalculatedNearPlane()) cv->setCalculatedNearPlane(calculatedNearPlane);
if (calculatedFarPlane > cv->getCalculatedFarPlane()) cv->setCalculatedFarPlane(calculatedFarPlane);
}
if (calculatedFarPlane>calculatedNearPlane)
{
cv->clampProjectionMatrix(projectionMatrix, calculatedNearPlane, calculatedFarPlane);
}
osg::Matrix inv_projectionModelViewMatrix;
inv_projectionModelViewMatrix.invert(modelviewMatrix*projectionMatrix);
double depth = 1.0;
osg::Vec3d v00 = osg::Vec3d(-1.0,-1.0,depth)*inv_projectionModelViewMatrix;
osg::Vec3d v01 = osg::Vec3d(-1.0,1.0,depth)*inv_projectionModelViewMatrix;
osg::Vec3d v10 = osg::Vec3d(1.0,-1.0,depth)*inv_projectionModelViewMatrix;
osg::Vec3d v11 = osg::Vec3d(1.0,1.0,depth)*inv_projectionModelViewMatrix;
// OSG_NOTICE<<"v00= "<<v00<<std::endl;
// OSG_NOTICE<<"v01= "<<v01<<std::endl;
// OSG_NOTICE<<"v10= "<<v10<<std::endl;
// OSG_NOTICE<<"v11= "<<v11<<std::endl;
(*(viewData->_vertices))[0] = v01;
(*(viewData->_vertices))[1] = v00;
(*(viewData->_vertices))[2] = v11;
(*(viewData->_vertices))[3] = v10;
viewData->_geometry->dirtyBound();
//OSG_NOTICE<<" new after RTT near ="<<cv->getCalculatedNearPlane()<<std::endl;
//OSG_NOTICE<<" new after RTT far ="<<cv->getCalculatedFarPlane()<<std::endl;
viewData->_backdropSubgraph->accept(*cv);
osg::NodePath nodePathPriorToTraversingSubgraph = cv->getNodePath();
cv->setUserValue("VolumeSceneTraversal",std::string("Post"));
// for each tile that needs post rendering we need to add it into current RenderStage.
Tiles& tiles = viewData->_tiles;
for(Tiles::iterator itr = tiles.begin();
itr != tiles.end();
++itr)
{
TileData* tileData = itr->second.get();
if (!tileData || !(tileData->active))
{
OSG_INFO<<"Skipping TileData that is inactive : "<<tileData<<std::endl;
continue;
}
unsigned int numStateSetPushed = 0;
// OSG_NOTICE<<"VolumeTile to add "<<tileData->projectionMatrix.get()<<", "<<tileData->modelviewMatrix.get()<<std::endl;
osg::NodePath& nodePath = tileData->nodePath;
cv->getNodePath() = nodePath;
cv->pushProjectionMatrix(tileData->projectionMatrix.get());
cv->pushModelViewMatrix(tileData->modelviewMatrix.get(), osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
cv->pushStateSet(viewData->_stateset.get());
++numStateSetPushed;
cv->pushStateSet(tileData->stateset.get());
++numStateSetPushed;
osg::NodePath::iterator np_itr = nodePath.begin();
// skip over all nodes above VolumeScene as this will have already been traversed by CullVisitor
while(np_itr!=nodePath.end() && (*np_itr)!=viewData->_rttCamera.get()) {
++np_itr;
}
if (np_itr!=nodePath.end()) ++np_itr;
// push the stateset on the nodes between this VolumeScene and the VolumeTile
for(osg::NodePath::iterator ss_itr = np_itr;
ss_itr != nodePath.end();
++ss_itr)
{
if ((*ss_itr)->getStateSet())
{
numStateSetPushed++;
cv->pushStateSet((*ss_itr)->getStateSet());
// OSG_NOTICE<<" pushing StateSet"<<std::endl;
}
}
cv->traverse(*(tileData->nodePath.back()));
// pop the StateSet's
for(unsigned int i=0; i<numStateSetPushed; ++i)
{
cv->popStateSet();
// OSG_NOTICE<<" popping StateSet"<<std::endl;
}
cv->popModelViewMatrix();
cv->popProjectionMatrix();
}
// need to synchronize projection matrices:
// current CV projection matrix
// main scene RTT Camera projection matrix
// each tile RTT Camera
// each tile final render.
cv->getNodePath() = nodePathPriorToTraversingSubgraph;
}
void LightPointNode::traverse(osg::NodeVisitor& nv)
{
if (_lightPointList.empty())
{
// no light points so no op.
return;
}
//#define USE_TIMER
#ifdef USE_TIMER
osg::Timer timer;
osg::Timer_t t1=0,t2=0,t3=0,t4=0,t5=0,t6=0,t7=0,t8=0;
#endif
#ifdef USE_TIMER
t1 = timer.tick();
#endif
osgUtil::CullVisitor* cv = nv.asCullVisitor();
#ifdef USE_TIMER
t2 = timer.tick();
#endif
// should we disable small feature culling here?
if (cv /*&& !cv->isCulled(_bbox)*/)
{
osg::Matrix matrix = *(cv->getModelViewMatrix());
osg::RefMatrix& projection = *(cv->getProjectionMatrix());
osgUtil::StateGraph* rg = cv->getCurrentStateGraph();
if (rg->leaves_empty())
{
// this is first leaf to be added to StateGraph
// and therefore should not already know current render bin,
// so need to add it.
cv->getCurrentRenderBin()->addStateGraph(rg);
}
#ifdef USE_TIMER
t3 = timer.tick();
#endif
LightPointDrawable* drawable = NULL;
osg::Referenced* object = rg->getUserData();
if (object)
{
if (typeid(*object)==typeid(LightPointDrawable))
{
// resuse the user data attached to the render graph.
drawable = static_cast<LightPointDrawable*>(object);
}
else if (typeid(*object)==typeid(LightPointSpriteDrawable))
{
drawable = static_cast<LightPointSpriteDrawable*>(object);
}
else
{
// will need to replace UserData.
OSG_WARN << "Warning: Replacing osgUtil::StateGraph::_userData to support osgSim::LightPointNode, may have undefined results."<<std::endl;
}
}
if (!drawable)
{
drawable = _pointSprites ? new LightPointSpriteDrawable : new LightPointDrawable;
rg->setUserData(drawable);
if (cv->getFrameStamp())
{
drawable->setSimulationTime(cv->getFrameStamp()->getSimulationTime());
}
}
// search for a drawable in the RenderLeaf list equal to the attached the one attached to StateGraph user data
// as this will be our special light point drawable.
osgUtil::StateGraph::LeafList::iterator litr;
for(litr = rg->_leaves.begin();
litr != rg->_leaves.end() && (*litr)->_drawable.get()!=drawable;
++litr)
{}
if (litr == rg->_leaves.end())
{
// haven't found the drawable added in the RenderLeaf list, therefore this may be the
// first time through LightPointNode in this frame, so need to add drawable into the StateGraph RenderLeaf list
// and update its time signatures.
drawable->reset();
rg->addLeaf(new osgUtil::RenderLeaf(drawable,&projection,NULL,FLT_MAX));
// need to update the drawable's frame count.
if (cv->getFrameStamp())
{
drawable->updateSimulationTime(cv->getFrameStamp()->getSimulationTime());
}
}
#ifdef USE_TIMER
t4 = timer.tick();
#endif
#ifdef USE_TIMER
t7 = timer.tick();
#endif
if (cv->getComputeNearFarMode() != osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
cv->updateCalculatedNearFar(matrix,_bbox);
const float minimumIntensity = 1.0f/256.0f;
const osg::Vec3 eyePoint = cv->getEyeLocal();
double time=drawable->getSimulationTime();
double timeInterval=drawable->getSimulationTimeInterval();
const osg::Polytope clipvol(cv->getCurrentCullingSet().getFrustum());
const bool computeClipping = false;//(clipvol.getCurrentMask()!=0);
//LightPointDrawable::ColorPosition cp;
for(LightPointList::iterator itr=_lightPointList.begin();
itr!=_lightPointList.end();
++itr)
{
const LightPoint& lp = *itr;
if (!lp._on) continue;
const osg::Vec3& position = lp._position;
// skip light point if it is not contianed in the view frustum.
if (computeClipping && !clipvol.contains(position)) continue;
// delta vector between eyepoint and light point.
osg::Vec3 dv(eyePoint-position);
float intensity = (_lightSystem.valid()) ? _lightSystem->getIntensity() : lp._intensity;
// slip light point if its intensity is 0.0 or negative.
if (intensity<=minimumIntensity) continue;
// (SIB) Clip on distance, if close to limit, add transparancy
float distanceFactor = 1.0f;
if (_maxVisibleDistance2!=FLT_MAX)
{
if (dv.length2()>_maxVisibleDistance2) continue;
else if (_maxVisibleDistance2 > 0)
distanceFactor = 1.0f - osg::square(dv.length2() / _maxVisibleDistance2);
}
osg::Vec4 color = lp._color;
// check the sector.
if (lp._sector.valid())
{
intensity *= (*lp._sector)(dv);
// skip light point if it is intensity is 0.0 or negative.
if (intensity<=minimumIntensity) continue;
}
// temporary accounting of intensity.
//color *= intensity;
// check the blink sequence.
bool doBlink = lp._blinkSequence.valid();
if (doBlink && _lightSystem.valid())
doBlink = (_lightSystem->getAnimationState() == LightPointSystem::ANIMATION_ON);
if (doBlink)
{
osg::Vec4 bs = lp._blinkSequence->color(time,timeInterval);
color[0] *= bs[0];
color[1] *= bs[1];
color[2] *= bs[2];
color[3] *= bs[3];
}
// if alpha value is less than the min intentsity then skip
if (color[3]<=minimumIntensity) continue;
float pixelSize = cv->pixelSize(position,lp._radius);
// cout << "pixelsize = "<<pixelSize<<endl;
// adjust pixel size to account for intensity.
if (intensity!=1.0) pixelSize *= sqrt(intensity);
// adjust alpha to account for max range (Fade on distance)
color[3] *= distanceFactor;
// round up to the minimum pixel size if required.
float orgPixelSize = pixelSize;
if (pixelSize<_minPixelSize) pixelSize = _minPixelSize;
osg::Vec3 xpos(position*matrix);
if (lp._blendingMode==LightPoint::BLENDED)
{
if (pixelSize<1.0f)
{
// need to use alpha blending...
color[3] *= pixelSize;
// color[3] *= osg::square(pixelSize);
if (color[3]<=minimumIntensity) continue;
drawable->addBlendedLightPoint(0, xpos,color);
}
else if (pixelSize<_maxPixelSize)
{
unsigned int lowerBoundPixelSize = (unsigned int)pixelSize;
float remainder = osg::square(pixelSize-(float)lowerBoundPixelSize);
// (SIB) Add transparency if pixel is clamped to minpixelsize
if (orgPixelSize<_minPixelSize)
color[3] *= (2.0/3.0) + (1.0/3.0) * sqrt(orgPixelSize / pixelSize);
drawable->addBlendedLightPoint(lowerBoundPixelSize-1, xpos,color);
color[3] *= remainder;
drawable->addBlendedLightPoint(lowerBoundPixelSize, xpos,color);
}
else // use a billboard geometry.
{
drawable->addBlendedLightPoint((unsigned int)(_maxPixelSize-1.0), xpos,color);
}
}
else // ADDITIVE blending.
{
if (pixelSize<1.0f)
{
// need to use alpha blending...
color[3] *= pixelSize;
// color[3] *= osg::square(pixelSize);
if (color[3]<=minimumIntensity) continue;
drawable->addAdditiveLightPoint(0, xpos,color);
}
else if (pixelSize<_maxPixelSize)
{
unsigned int lowerBoundPixelSize = (unsigned int)pixelSize;
float remainder = osg::square(pixelSize-(float)lowerBoundPixelSize);
// (SIB) Add transparency if pixel is clamped to minpixelsize
if (orgPixelSize<_minPixelSize)
color[3] *= (2.0/3.0) + (1.0/3.0) * sqrt(orgPixelSize / pixelSize);
float alpha = color[3];
color[3] = alpha*(1.0f-remainder);
drawable->addAdditiveLightPoint(lowerBoundPixelSize-1, xpos,color);
color[3] = alpha*remainder;
drawable->addAdditiveLightPoint(lowerBoundPixelSize, xpos,color);
}
else // use a billboard geometry.
{
drawable->addAdditiveLightPoint((unsigned int)(_maxPixelSize-1.0), xpos,color);
}
}
}
#ifdef USE_TIMER
t8 = timer.tick();
#endif
}
#ifdef USE_TIMER
cout << "compute"<<endl;
cout << " t2-t1="<<t2-t1<<endl;
cout << " t4-t3="<<t4-t3<<endl;
cout << " t6-t5="<<t6-t5<<endl;
cout << " t8-t7="<<t8-t7<<endl;
cout << "_lightPointList.size()="<<_lightPointList.size()<<endl;
cout << " t8-t7/size = "<<(float)(t8-t7)/(float)_lightPointList.size()<<endl;
#endif
}
void osgParticle::ParticleSystem::update(double dt, osg::NodeVisitor& nv)
{
// reset bounds
_reset_bounds_flag = true;
if (_useShaders)
{
// Update shader uniforms
// This slightly reduces the consumption of traversing the particle vector, because we
// don't compute tile and angle attributes that are useleff for shaders.
// At present, our lcoal shader implementation will ignore these particle props:
// _cur_tile, _s_coord, _t_coord, _prev_pos, _prev_angle and _angle
osg::StateSet* stateset = getOrCreateStateSet();
if (_dirty_uniforms)
{
osg::Uniform* u_vd = stateset->getUniform("visibilityDistance");
if (u_vd) u_vd->set((float)_visibilityDistance);
_dirty_uniforms = false;
}
}
for(unsigned int i=0; i<_particles.size(); ++i)
{
Particle& particle = _particles[i];
if (particle.isAlive())
{
if (particle.update(dt, _useShaders))
{
update_bounds(particle.getPosition(), particle.getCurrentSize());
}
else
{
reuseParticle(i);
}
}
}
if (_sortMode != NO_SORT)
{
// sort particles
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (cv)
{
osg::Matrixd modelview = *(cv->getModelViewMatrix());
double scale = (_sortMode==SORT_FRONT_TO_BACK ? -1.0 : 1.0);
double deadDistance = DBL_MAX;
for (unsigned int i=0; i<_particles.size(); ++i)
{
Particle& particle = _particles[i];
if (particle.isAlive())
particle.setDepth(distance(particle.getPosition(), modelview) * scale);
else
particle.setDepth(deadDistance);
}
std::sort<Particle_vector::iterator>(_particles.begin(), _particles.end());
// Repopulate the death stack as it will have been invalidated by the sort.
unsigned int numDead = _deadparts.size();
if (numDead>0)
{
// clear the death stack
_deadparts = Death_stack();
// copy the tail of the _particles vector as this will contain all the dead Particle thanks to the depth sort against DBL_MAX
Particle* first_dead_ptr = &_particles[_particles.size()-numDead];
Particle* last_dead_ptr = &_particles[_particles.size()-1];
for(Particle* dead_ptr = first_dead_ptr; dead_ptr<=last_dead_ptr; ++dead_ptr)
{
_deadparts.push(dead_ptr);
}
}
}
}
// force recomputing of bounding box on next frame
dirtyBound();
}
void Widget::traverseImplementation(osg::NodeVisitor& nv)
{
if (!_graphicsInitialized && nv.getVisitorType()!=osg::NodeVisitor::CULL_VISITOR) createGraphics();
osgGA::EventVisitor* ev = nv.asEventVisitor();
if (ev)
{
if (_visible && _enabled)
{
updateFocus(nv);
// OSG_NOTICE<<"EventTraversal getHasEventFocus()="<<getHasEventFocus()<<std::endl;
// signify that event has been taken by widget with focus
bool widgetsWithFocusSetHandled = getHasEventFocus();
osgGA::EventQueue::Events& events = ev->getEvents();
for(osgGA::EventQueue::Events::iterator itr = events.begin();
itr != events.end();
++itr)
{
if (handle(ev, itr->get()) || widgetsWithFocusSetHandled)
{
(*itr)->setHandled(true);
ev->setEventHandled(true);
}
}
GraphicsSubgraphMap::iterator itr = _graphicsSubgraphMap.begin();
while(itr!= _graphicsSubgraphMap.end() && itr->first<=0)
{
itr->second->accept(nv);
++itr;
}
osg::Group::traverse(nv);
while(itr!= _graphicsSubgraphMap.end())
{
itr->second->accept(nv);
++itr;
}
}
}
else if (_visible ||
(nv.getVisitorType()!=osg::NodeVisitor::UPDATE_VISITOR && nv.getVisitorType()!=osg::NodeVisitor::CULL_VISITOR && nv.getVisitorType()!=osg::NodeVisitor::INTERSECTION_VISITOR) )
{
osgUtil::CullVisitor* cv = (nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR) ? nv.asCullVisitor() : 0;
if (cv && _widgetStateSet.valid()) cv->pushStateSet(_widgetStateSet.get());
GraphicsSubgraphMap::iterator itr = _graphicsSubgraphMap.begin();
while(itr!= _graphicsSubgraphMap.end() && itr->first<=0)
{
itr->second->accept(nv);
++itr;
}
Group::traverse(nv);
while(itr!= _graphicsSubgraphMap.end())
{
itr->second->accept(nv);
++itr;
}
if (cv && _widgetStateSet.valid()) cv->popStateSet();
}
}
void Impostor::traverse(osg::NodeVisitor& nv)
{
if (nv.getVisitorType() != osg::NodeVisitor::CULL_VISITOR)
{
LOD::traverse(nv);
return;
}
osgUtil::CullVisitor* cv = nv.asCullVisitor();
if (!cv)
{
LOD::traverse(nv);
return;
}
osg::Vec3 eyeLocal = nv.getEyePoint();
const BoundingSphere& bs = getBound();
unsigned int contextID = cv->getState() ? cv->getState()->getContextID() : 0;
float distance2 = (eyeLocal-bs.center()).length2();
float LODScale = cv->getLODScale();
if (!cv->getImpostorsActive() ||
distance2*LODScale*LODScale<osg::square(getImpostorThreshold()) ||
distance2<bs.radius2()*2.0f)
{
// outwith the impostor distance threshold therefore simple
// traverse the appropriate child of the LOD.
LOD::traverse(nv);
}
else
{
// within the impostor distance threshold therefore attempt
// to use impostor instead.
RefMatrix& matrix = *cv->getModelViewMatrix();
// search for the best fit ImpostorSprite;
ImpostorSprite* impostorSprite = findBestImpostorSprite(contextID,eyeLocal);
if (impostorSprite)
{
// impostor found, now check to see if it is good enough to use
float error = impostorSprite->calcPixelError(*(cv->getMVPW()));
if (error>cv->getImpostorPixelErrorThreshold())
{
// chosen impostor sprite pixel error is too great to use
// from this eye point, therefore invalidate it.
impostorSprite=NULL;
}
}
// need to think about sprite reuse and support for multiple context's.
if (impostorSprite==NULL)
{
// no appropriate sprite has been found therefore need to create
// one for use
// create the impostor sprite.
impostorSprite = createImpostorSprite(cv);
//if (impostorSprite) impostorSprite->_color.set(0.0f,0.0f,1.0f,1.0f);
}
//else impostorSprite->_color.set(1.0f,1.0f,1.0f,1.0f);
if (impostorSprite)
{
// update frame number to show that impostor is in action.
impostorSprite->setLastFrameUsed(cv->getTraversalNumber());
if (cv->getComputeNearFarMode()) cv->updateCalculatedNearFar(matrix,*impostorSprite, false);
StateSet* stateset = impostorSprite->getStateSet();
if (stateset) cv->pushStateSet(stateset);
cv->addDrawableAndDepth(impostorSprite, &matrix, distance(getCenter(),matrix));
if (stateset) cv->popStateSet();
}
else
{
// no impostor has been selected or created so default to
// traversing the usual LOD selected child.
LOD::traverse(nv);
}
}
}