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Futher work on view dependent OverlayNode

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This commit is contained in:
Robert Osfield 2007-05-16 19:19:43 +00:00
parent 78800829ed
commit d80cf6b5ee
2 changed files with 114 additions and 65 deletions
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2
examples/osgsimulation/osgsimulation.cpp
View File

@ -366,5 +366,7 @@ int main(int argc, char **argv)
}
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
return viewer.run();
}

177
src/osgSim/OverlayNode.cpp
View File

@ -128,31 +128,12 @@ void OverlayNode::setOverlayTechnique(OverlayTechnique technique)
OverlayNode::OverlayData& OverlayNode::getOverlayData(osgUtil::CullVisitor* cv)
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_overlayDataMapMutex);
return _overlayDataMap[cv];
}
void OverlayNode::init()
{
switch(_overlayTechnique)
{
case(OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY):
init_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY();
break;
case(VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY):
init_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY();
break;
case(VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY):
init_VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY();
break;
}
}
void OverlayNode::init_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY()
{
osg::notify(osg::NOTICE)<<"OverlayNode::init() - OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY"<<std::endl;
OverlayData& overlayData = getOverlayData(0);
OverlayDataMap::iterator itr = _overlayDataMap.find(cv);
if (itr != _overlayDataMap.end()) return itr->second;
OverlayData& overlayData = _overlayDataMap[cv];
unsigned int tex_width = _textureSizeHint;
unsigned int tex_height = _textureSizeHint;
@ -181,6 +162,8 @@ void OverlayNode::init_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY()
overlayData._camera->setClearColor(_overlayClearColor);
overlayData._camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
// set viewport
overlayData._camera->setViewport(0,0,tex_width,tex_height);
@ -192,13 +175,55 @@ void OverlayNode::init_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY()
// attach the texture and use it as the color buffer.
overlayData._camera->attach(osg::Camera::COLOR_BUFFER, overlayData._texture.get());
if (_overlaySubgraph.valid()) overlayData._camera->addChild(_overlaySubgraph.get());
}
if (!overlayData._texgenNode) overlayData._texgenNode = new osg::TexGenNode;
if (!overlayData._texgenNode)
{
overlayData._texgenNode = new osg::TexGenNode;
overlayData._texgenNode->setTextureUnit(_textureUnit);
}
if (!overlayData._mainSubgraphStateSet) overlayData._mainSubgraphStateSet = new osg::StateSet;
if (!overlayData._mainSubgraphStateSet)
{
overlayData._mainSubgraphStateSet = new osg::StateSet;
setOverlayTextureUnit(_textureUnit);
overlayData._mainSubgraphStateSet->setTextureAttributeAndModes(_textureUnit, overlayData._texture.get(), osg::StateAttribute::ON);
overlayData._mainSubgraphStateSet->setTextureMode(_textureUnit, GL_TEXTURE_GEN_S, osg::StateAttribute::ON);
overlayData._mainSubgraphStateSet->setTextureMode(_textureUnit, GL_TEXTURE_GEN_T, osg::StateAttribute::ON);
overlayData._mainSubgraphStateSet->setTextureMode(_textureUnit, GL_TEXTURE_GEN_R, osg::StateAttribute::ON);
overlayData._mainSubgraphStateSet->setTextureMode(_textureUnit, GL_TEXTURE_GEN_Q, osg::StateAttribute::ON);
if (_texEnvMode!=GL_NONE)
{
overlayData._mainSubgraphStateSet->setTextureAttribute(_textureUnit, new osg::TexEnv((osg::TexEnv::Mode)_texEnvMode));
}
}
return overlayData;
}
void OverlayNode::init()
{
switch(_overlayTechnique)
{
case(OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY):
init_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY();
break;
case(VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY):
init_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY();
break;
case(VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY):
init_VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY();
break;
}
}
void OverlayNode::init_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY()
{
osg::notify(osg::NOTICE)<<"OverlayNode::init() - OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY"<<std::endl;
OverlayData& overlayData = getOverlayData(0);
}
void OverlayNode::init_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY()
@ -260,8 +285,7 @@ void OverlayNode::traverse_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeV
csn = dynamic_cast<osg::CoordinateSystemNode*>(*itr);
}
camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
if (csn)
{
osg::Vec3d eyePoint(0.0,0.0,0.0); // center of the planet
@ -346,19 +370,6 @@ void OverlayNode::traverse_OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeV
// now set up the drawing of the main scene.
#if 0
// Disable for time being as _overlaySubgraphBound isn't accurate for
// detecting whether the overaly texture will sit over affect the rendering
// of the children of the OverlayNode. Frustrum intersection may prove more
// fruitful.
// note needs to use bound when captured not current bound.
if (!_overlaySubgraphBound.valid() || cv->isCulled(_overlaySubgraphBound))
{
Group::traverse(nv);
}
else
#endif
{
overlayData._texgenNode->accept(*cv);
@ -401,6 +412,7 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
}
OverlayData& overlayData = getOverlayData(cv);
osg::Camera* camera = overlayData._camera.get();
if (_overlaySubgraph.valid())
{
@ -408,8 +420,27 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
osg::ComputeBoundsVisitor cbbv(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
_overlaySubgraph->accept(cbbv);
// see if we are within a coordinate system node.
osg::CoordinateSystemNode* csn = 0;
osg::NodePath& nodePath = nv.getNodePath();
for(osg::NodePath::reverse_iterator itr = nodePath.rbegin();
itr != nodePath.rend() && csn==0;
++itr)
{
csn = dynamic_cast<osg::CoordinateSystemNode*>(*itr);
}
osg::BoundingSphere bs = _overlaySubgraph->getBound();
// push the stateset.
cv->pushStateSet(overlayData._mainSubgraphStateSet.get());
Group::traverse(nv);
cv->popStateSet();
osg::Matrix pm = *(cv->getProjectionMatrix());
osgUtil::CullVisitor::value_type znear = cv->getCalculatedNearPlane();
@ -468,18 +499,6 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
osg::notify(osg::NOTICE)<<" center ="<<center<<" diagonal ="<<diagonal<<std::endl;
osg::notify(osg::NOTICE)<<" frustum_axis ="<<frustum_axis<<" diagonal_near ="<<diagonal_near<<" diagonal_far="<<diagonal_far<<std::endl;
// see if we are within a coordinate system node.
osg::CoordinateSystemNode* csn = 0;
osg::NodePath& nodePath = nv.getNodePath();
for(osg::NodePath::reverse_iterator itr = nodePath.rbegin();
itr != nodePath.rend() && csn==0;
++itr)
{
csn = dynamic_cast<osg::CoordinateSystemNode*>(*itr);
}
osg::Vec3d lookVector(0.0,0.0,-1.0);
if (csn)
@ -518,21 +537,54 @@ void OverlayNode::traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(osg::NodeVis
osg::notify(osg::NOTICE)<<" upVector ="<<upVector<<" min="<<min_side<<" max="<<max_side<<std::endl;
osg::notify(osg::NOTICE)<<" sideVector ="<<sideVector<<" min="<<min_up<<" max="<<max_up<<std::endl;
double bs_center = (bs.center()-center) * lookVector;
double bs_near = bs_center-bs.radius();
double bs_far = bs_center+bs.radius();
osg::notify(osg::NOTICE)<<" bs_near="<<bs_near<<" bs_far="<<bs_far<<std::endl;
camera->setProjectionMatrixAsOrtho(min_side,max_side,min_up,max_up,bs_near,bs_far);
camera->setViewMatrixAsLookAt(center, center+lookVector, upVector);
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
MVP = camera->getViewMatrix() * camera->getProjectionMatrix();
osg::Matrix MVPT = MVP *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5,0.5,0.5);
overlayData._texgenNode->getTexGen()->setMode(osg::TexGen::EYE_LINEAR);
overlayData._texgenNode->getTexGen()->setPlanesFromMatrix(MVPT);
overlayData._textureFrustum.setToUnitFrustum(false,false);
overlayData._textureFrustum.transformProvidingInverse(MVP);
osg::notify(osg::NOTICE)<<std::endl;
unsigned int contextID = cv->getState()!=0 ? cv->getState()->getContextID() : 0;
// if we need to redraw then do cull traversal on camera.
camera->setClearColor(_overlayClearColor);
camera->accept(*cv);
_textureObjectValidList[contextID] = 1;
overlayData._texgenNode->accept(*cv);
}
else
{
Group::traverse(nv);
}
// osg::notify(osg::NOTICE)<<" "<<&overlayData<<std::endl;
}
void OverlayNode::traverse_VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY(osg::NodeVisitor& nv)
{
osg::notify(osg::NOTICE)<<"OverlayNode::traverse() - VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY"<<std::endl;
traverse_VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY(nv);
}
@ -576,14 +628,6 @@ void OverlayNode::setOverlayTextureUnit(unsigned int unit)
{
_textureUnit = unit;
for(OverlayDataMap::iterator itr = _overlayDataMap.begin();
itr != _overlayDataMap.end();
++itr)
{
osg::TexGenNode* texgenNode = itr->second._texgenNode.get();
if (texgenNode) texgenNode->setTextureUnit(_textureUnit);
}
updateMainSubgraphStateSet();
}
@ -613,6 +657,9 @@ void OverlayNode::updateMainSubgraphStateSet()
itr != _overlayDataMap.end();
++itr)
{
osg::TexGenNode* texgenNode = itr->second._texgenNode.get();
if (texgenNode) texgenNode->setTextureUnit(_textureUnit);
osg::StateSet* mainSubgraphStateSet = itr->second._mainSubgraphStateSet.get();
if (mainSubgraphStateSet)
{