void CVRCullVisitor::apply(osg::Projection& node)
{
// push the culling mode.
pushCurrentMask();
// push the node's state.
StateSet* node_state = node.getStateSet();
if(node_state)
pushStateSet(node_state);
// record previous near and far values.
float previous_znear = _computed_znear;
float previous_zfar = _computed_zfar;
// take a copy of the current near plane candidates
DistanceMatrixDrawableMap previousNearPlaneCandidateMap;
previousNearPlaneCandidateMap.swap(_nearPlaneCandidateMap);
_computed_znear = FLT_MAX;
_computed_zfar = -FLT_MAX;
ref_ptr<RefMatrix> matrix = createOrReuseMatrix(node.getMatrix());
pushProjectionMatrix(matrix.get());
//OSG_NOTIFY(osg::INFO)<<"Push projection "<<*matrix<<std::endl;
// note do culling check after the frustum has been updated to ensure
// that the node is not culled prematurely.
bool status = _cullingStatus;
bool firstStatus = _firstCullStatus;
if(!isCulled(node))
{
handle_cull_callbacks_and_traverse(node);
}
_firstCullStatus = firstStatus;
_cullingStatus = status;
popProjectionMatrix();
//OSG_NOTIFY(osg::INFO)<<"Pop projection "<<*matrix<<std::endl;
_computed_znear = previous_znear;
_computed_zfar = previous_zfar;
// swap back the near plane candidates
previousNearPlaneCandidateMap.swap(_nearPlaneCandidateMap);
// pop the node's state off the render graph stack.
if(node_state)
popStateSet();
// pop the culling mode.
popCurrentMask();
}
void PickVisitor::apply(osg::Projection& projection)
{
runNestedPickVisitor( projection,
_lastViewport.get(),
projection.getMatrix(),
_lastViewMatrix,
_mx, _my );
}
void IntersectionVisitor::apply(osg::Projection& projection)
{
if (!enter(projection)) return;
pushProjectionMatrix(new osg::RefMatrix(projection.getMatrix()) );
// now push an new intersector clone transform to the new local coordinates
push_clone();
traverse(projection);
// pop the clone.
pop_clone();
popProjectionMatrix();
leave();
}
void CollectOccludersVisitor::apply(osg::Projection &node)
{
if (isCulled(node))
return;
// push the culling mode.
pushCurrentMask();
ref_ptr<osg::RefMatrix> matrix = createOrReuseMatrix(node.getMatrix());
pushProjectionMatrix(matrix.get());
handle_cull_callbacks_and_traverse(node);
popProjectionMatrix();
// pop the culling mode.
popCurrentMask();
}
void CURRENT_CLASS::apply(osg::Projection &proj)
{
if(shouldContinueTraversal(proj))
{
// Push the new projection matrix view frustum
_projectionMatrices.push_back(proj.getMatrix());
pushLocalFrustum();
// Traverse the group
++_currentDepth;
traverse(proj);
--_currentDepth;
// Reload original matrix and frustum
_localFrusta.pop_back();
_bbCorners.pop_back();
_projectionMatrices.pop_back();
}
}