source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/src/OgreOctreeHierarchyInterface.cpp @ 827

#include "OgreOctreeHierarchyInterface.h"
#include "OgreVisibilityOctreeSceneManager.h"
#include <OgreOctree.h>
#include <OgreLogManager.h>
#include <OgreStringConverter.h>


namespace Ogre {

//-----------------------------------------------------------------------
OctreeHierarchyInterface::OctreeHierarchyInterface(OctreeSceneManager *sm, RenderSystem *rsys): 
SceneNodeHierarchyInterface(sm, rsys)
{
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::TraverseNode(GtpVisibility::HierarchyNode *node)
{
        ++ mNumTraversedNodes;

        Octree *octree = static_cast<Octree *>(node);

        // if we come across some renderable geometry => render it
        if (!octree->mNodes.empty())
        {
                RenderNode(node);
        }
        
        // if not all subtrees are empty
        if (!IsLeaf(node))
        {
                Octree *nextChild;

                if ((nextChild = octree->mChildren[0][0][0]) != NULL)
                        mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[0][0][1]) != NULL)
                        mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[0][1][0]) != NULL)
                        mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[0][1][1]) != NULL)
                mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[1][0][0]) != NULL)
                        mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[1][0][1]) != NULL)
                        mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[1][1][0]) != NULL)
                        mDistanceQueue->push(nextChild);
                if ((nextChild = octree->mChildren[1][1][1]) != NULL)
                        mDistanceQueue->push(nextChild);
        }
}
//-----------------------------------------------------------------------
bool OctreeHierarchyInterface::IsLeaf(GtpVisibility::HierarchyNode *node) const
{
        Octree *octree = static_cast<Octree *>(node);
        // HACK: if there are subtrees, they are empty => we are not interested in them
        return octree->numNodes() == (int)octree->mNodes.size();
}
//-----------------------------------------------------------------------
bool OctreeHierarchyInterface::HasGeometry(GtpVisibility::HierarchyNode *node) const
{
        return !(static_cast<Octree *>(node))->mNodes.empty();
}
//-----------------------------------------------------------------------
float OctreeHierarchyInterface::GetSquaredDistance(GtpVisibility::HierarchyNode *node) const
{
        const Vector3 bmin = static_cast<Octree *>(node)->mBox.getMinimum();
        const Vector3 bmax = static_cast<Octree *>(node)->mBox.getMaximum();

        const Vector3 pos = (bmax - bmin) * 0.5 + bmin;
        
        return (mCameraPosition - pos).squaredLength();
        //return (mCullCamera->getDerivedPosition() - pos).squaredLength();
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::SetNodeVisible(GtpVisibility::HierarchyNode *node, 
                                                                                          const bool visible) const
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        static_cast<Octree *>(node)->setOctreeVisible(visible);
#endif
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::SetLastVisited(GtpVisibility::HierarchyNode *node, 
                                                                                          const unsigned int frameId) const
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        static_cast<Octree *>(node)->setLastVisited(frameId);
#endif
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::PullUpVisibility(GtpVisibility::HierarchyNode *node) const
{               
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        Octree *octant = static_cast<Octree *>(node);

        while (octant && !octant->isOctreeVisible())
        {
                octant->setOctreeVisible(true);
                octant = octant->getParent();
        }
#endif
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::RenderNode(GtpVisibility::HierarchyNode *node)
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        Octree *octant = static_cast<Octree *>(node);

        if (octant->lastRendered() != mFrameId)
        {
                octant->setLastRendered(mFrameId);
                OctreeSceneManager *ocm = 
                        //dynamic_cast<OctreeSceneManager *>(mSceneManager);
                        static_cast<OctreeSceneManager *>(mSceneManager);
                ocm->_renderOctant(mCamera, octant, mOnlyShadowCasters, mLeavePassesInQueue);

                mVisibleNodes.push_back(node);
        }
#endif
        
}
//-----------------------------------------------------------------------
bool OctreeHierarchyInterface::IsNodeVisible(GtpVisibility::HierarchyNode *node) const
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        return static_cast<Octree *>(node)->isOctreeVisible();
#else
        return true;
#endif
}
//-----------------------------------------------------------------------
unsigned int OctreeHierarchyInterface::LastVisited(GtpVisibility::HierarchyNode *node) const
{
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        return static_cast<Octree *>(node)->lastVisited();
#else
        return 0;
#endif
}
//-----------------------------------------------------------------------
AxisAlignedBox *OctreeHierarchyInterface::GetBoundingBox(GtpVisibility::HierarchyNode *node)
{
        if (node != mSavedNode)
        {
                mSavedNode = node;
            //static_cast<Octree *>(node)->_getCullBounds(&mBox);
                mBox = static_cast<Octree *>(node)->_getWorldAABB();
        }

        return &mBox;
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::VisualizeCulledNode(GtpVisibility::HierarchyNode *node, 
                                                                                                   GtpVisibility::CullingType type) const
{
        WireBoundingBox *box = static_cast<Octree *>(node)->getWireBoundingBox();

        if (type == GtpVisibility::FRUSTUM_CULLED)
        {
                box->setMaterial("FrustumCulledNodesMaterial");
        }
        else // type == GtpVisibility::QUERY_CULLED
        {
                box->setMaterial("QueryCulledNodesMaterial");
        }

        //dynamic_cast<OctreeSceneManager *>(mSceneManager)->getBoxes()->push_back(box);
        static_cast<OctreeSceneManager *>(mSceneManager)->getBoxes()->push_back(box);
}
//-----------------------------------------------------------------------
void OctreeHierarchyInterface::GetNodeGeometryList(GtpVisibility::HierarchyNode *node,
                                                                                                   GtpVisibility::GeometryVector *geometryList, 
                                                                                                   bool includeChildren)
{
        NodeList::const_iterator nodeIt, nodeIt_end;
        nodeIt_end = static_cast<Octree *>(node)->mNodes.end();

        for (nodeIt = static_cast<Octree *>(node)->mNodes.begin(); nodeIt != nodeIt_end; ++nodeIt)
        {
                SceneNodeHierarchyInterface::GetNodeGeometryList(*nodeIt, geometryList, includeChildren);
        }
}

} // namespace Ogre