void CURRENT_CLASS::apply(osg::Transform &transform)
{
if(shouldContinueTraversal(transform))
{
// Compute transform for current node
osg::Matrix currMatrix = _viewMatrices.back();
bool pushMatrix = transform.computeLocalToWorldMatrix(currMatrix,this);
if(pushMatrix)
{
// Store the new modelview matrix and view frustum
_viewMatrices.push_back(currMatrix);
pushLocalFrustum();
}
++_currentDepth;
traverse(transform);
--_currentDepth;
if(pushMatrix)
{
// Restore the old modelview matrix and view frustum
_localFrusta.pop_back();
_bbCorners.pop_back();
_viewMatrices.pop_back();
}
}
}
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();
}
}
void DistanceAccumulator::reset()
{
// Clear vectors & values
_distancePairs.clear();
_cameraPairs.clear();
_limits.first = DBL_MAX;
_limits.second = 0.0;
_currentDepth = 0;
// Initial transform matrix is the modelview matrix
_viewMatrices.clear();
_viewMatrices.push_back(_modelview);
// Set the initial projection matrix
_projectionMatrices.clear();
_projectionMatrices.push_back(_projection);
// Create a frustum without near/far planes, for cull computations
_localFrusta.clear();
_bbCorners.clear();
pushLocalFrustum();
}
